The CPS consists of several signals to shut down the fission reaction or reduce the power to a lower level. The CPS Signals and the actuation criteria applicable for the RELAP5 model are summarized below.
Fast-Acting Scram (FAS Signal)
The FAS Signal is used in especially urgent situations, when a sudden change in reactivity cannot be avoided. The FAS Signal leads to the insertion of 24 fast-acting scram rods (FASR) at 2.5 m/s and 40 shortened absorber rods at a speed of 0.4 m/s, and the remaining 147 rods in 14 s. The actuation signals are developed next [3]. These include;
• High pressure in the ACS
Since the ACS is not modeled, the high pressure signal from a LOCA will not be considered.
• Instability during start-up
The scope of the current model is for full-power, operational transients. Consequently, these signal will not be considered.
• Reactor power level 10% above nominal
The non-dimensional power level is compared to the setpoint power (4155 MW) [2] in Control Variable 520 and a trip is issued if the power exceeds 110% of the setpoint (110% is referenced in [3] ).
Non-dimensionalize the core power coming out of the reactor physics package as
520 CV-520 = P/P0 = (rktpow 0)/4.155e9 W
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20552000
W1(A) ALPHANUMERIC NAME = power
W2(A) CONTROL COMPONENT TYPE = constant
W3(R) SCALING FACTOR = 1.0
For a constant component, this quantity is the constant value. No additional words are entered on this card, and cards 205CCC01 through 205CCC09 or 205CCCC1 through 205CCCC9 are not entered.
130 Is the non-dimensional power > 110%?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601300
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 520
W1(A) and W2(I) represent the current non-dimensional core power
W3(A) RELATIONSHIP = gt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 1.1
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Manual FAS Signal
The FAS Signal is the combination of the signals defined above and a manual signal.
131 The manual signal will occur when time > 1.e6 s (e.g., never active)?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601310
W1(A) VARIABLE CODE = time
W2(I) PARAMETER = 0
W1(A) and W2(I) represent the current transient time
W3(A) RELATIONSHIP = gt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 1.e6
This is an arbitrarily high user-specified time.
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611010
W1(A) TRIP NUMBER = 131
The manual signal will occur when time > 1.e6 s (e.g., never active)
W2(A) OPERATOR = and
W3(A) TRIP NUMBER = 101
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
FAS Signal
The FAS Signal is the combination of the signals defined above.
1130 Is there either a 110% high power signal or a short-term ECCS signal?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611300
W1(I) TRIP NUMBER = 130
110% high power signal
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1110
Short-term ECCS signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1131 Is there a 110% high power signal, a short-term ECCS signal, or a manual FAS signal?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611310
W1(I) TRIP NUMBER = 1130
110% high power or short-term ECCS signal
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 131
Manual FAS signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
FAS reactivity
Upon getting a FAS Signal, Table 525 is used to provide the negative reactivity versus time for the insertion of 24 fast-acting scram rods (FASR) at 2.5 m/s, 40 shortened absorber rods at a speed of 0.4 m/s, and the remaining 147 rods in 14 s. The FAS reactivity versus time is obtained from plant data and calculations ([3] for the first 3 s).
521 CV-521 = FAS Reactivity from Table 525
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20552100
W1(A) ALPHANUMERIC NAME = fas_reac
W2(A) CONTROL COMPONENT TYPE = function
Specifies a function component. The function component gets a value from a standard table.
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = 0.0
Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20552101
W1(A) & W2(I) VARIABLE REQUEST CODE V1 = time 0
Specifies the transient time.
W3(R) TABLE NUMBER = 525
The FAS reactivity table.
525 FAS Reactivity Table
CARD 202TTT00, TABLE TYPE AND MULTIPLIER DATA
Card 20252500
W1(A) TABLE TYPE = reac-t
react-t specifies a table type for reactivity versus time. Although the data in this table does not have to represent reactivity versus time data, it is a common practice to use this option when no units conversion is desired.
W2(I) TRIP NUMBER = 1131
CARD 202TTT01 THROUGH 202TTT99, GENERAL TABLE DATA
|
Card Number |
Time after Trip [s] |
Reactivity [$] |
|
20252501 |
0.0 |
0.0 |
|
20252502 |
0.5 |
-0.3 |
|
20252503 |
1.0 |
-1.0 |
|
20252504 |
1.2 |
-2.5 |
|
20252505 |
1.5 |
-2.7 |
|
20252506 |
2.0 |
-2.8 |
|
20252507 |
2.5 |
-2.9 |
|
20252508 |
3.0 |
-3.0 |
|
20252509 |
4.7 |
-6.8 |
|
20252510 |
7.1 |
-10.0 |
|
20252511 |
9.5 |
-12.4 |
|
20252512 |
11.9 |
-14.3 |
|
20252513 |
14.2 |
-17.0 |
To eliminate discontinuities if successively higher CPS signals are actuated, the highest negative reactivity from all lower level signals and FAS signal are considered. For example, if an AZ-3 signal is generated and degrades into a FAS signal, the control rod movement already considered in the AZ-3 signal will not be reset back to zero.
522 CV-522 = min( rFAS, rAZ-1, rAZ-3, rAZ-4, and CV-522)
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20552200
W1(A) ALPHANUMERIC NAME = react
W2(A) CONTROL COMPONENT TYPE = stdfnctn
Specifies a function component. The function component gets a value from a standard table.
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20552201
W1(A) FUNCTION TYPE = min
W2(A) & W3(I) VARIABLE REQUEST CODE V1 = cntrlvar 521
Specifies the FAS reactivity.
Card 20552202
W1(A) & W2(I) VARIABLE REQUEST CODE V2 = cntrlvar 526
Specifies the AZ-1 reactivity.
Card 20552203
W1(A) & W2(I) VARIABLE REQUEST CODE V3 = cntrlvar 562
Specifies the AZ-3 and AZ-4 reactivity.
Card 20552204
W1(A) & W2(I) VARIABLE REQUEST CODE V4 = cntrlvar 522
Specifies the previous timestep minimum value.
Next, the minimum reactivity developed by the CPS signals is multiplied by a "trip unit" signifying the occurrence of either a FAS or AZ-1 signal.
523 CV-523 = tripunit (FAS or AZ-1 signal)
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20552300
W1(A) ALPHANUMERIC NAME = fas_az1
W2(A) CONTROL COMPONENT TYPE = tripunit
Specifies a trip unit function.
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20552301
W1(A) TRIP NUMBER = 1253
AZ-1 or a FAS signal
525 CV-525 = min (rFAS, rAZ-1 , rAZ-3, rAZ-4 )* tripunit(FAS or AZ-1)
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20552500
W1(A) ALPHANUMERIC NAME = fas_az1
W2(A) CONTROL COMPONENT TYPE = mult
Specifies a multiply function.
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20552501
W1(A) & W2(I) VARIABLE REQUEST CODE V1 = cntrlvar 522
Card 20552502
W1(A) & W2(I) VARIABLE REQUEST CODE V2 = cntrlvar 523
Specifies the FAS or AZ-1 trip has occurred.
Emergency Protection 1 (AZ-1) Signal
This is a normal shutting down of the chain reaction. The AZ-1 Signal leads to the insertion of 24 FASR in 6-8 s and the remaining rods as in the FAS. The actuation signals [ ] are developed next.
Turbine Trip or Loss of Load
An AZ-1 Signal is initiated when both turbines trip or lose their load (or one turbine trip or loss of load to one turbine if only one turbine is operating). The turbine is not simulated in the RELAP5 model. Furthermore, the RBMK model assumes that both turbines are operating. Consequently, this trip will be monitored by a closure of both turbine control valves. Trip 140 monitors the RHS of the reactor while Trip 141 monitors the LHS of the reactor.
140 Is the LHS TCV flow area < 5.e-2 (e.g., closed)?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601400
W1(A) VARIABLE CODE = vlvarea
W2(I) PARAMETER = 195
W1(A) and W2(I) represent the non-dimensional valve area for the RHS Turbine Control Valve
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 5.e-2
Arbitrarily small valve opening.
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
141 Is the RHS TCV flow area < 5.e-2 (e.g., closed)?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601410
W1(A) VARIABLE CODE = vlvarea
W2(I) PARAMETER = 595
W1(A) and W2(I) represent the non-dimensional valve area for the RHS Turbine Control Valve
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 5.e-2
Arbitrarily small valve opening.
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1140 Are either the RHS and the LHS TCV closed?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611400
W1(I) TRIP NUMBER = 140
LHS TCV closure signal
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = 141
RHS TCV closure signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Main Coolant Pump (MCP) Trip
An AZ-1 Signal is activated when two out of the three MCPs trip off. Since all three pumps are lumped together on the LHS, an AZ-1 Signal is generated when the lumped pump trips. On the RHS, two out of three logic is used to evaluate whether the two pumps are tripped. It is not known how a MCP trip is monitored at the plant. For the RELAP5 model, failure of the main recirculation pumps will be monitored through the pump motor torque. Since the pump motor torque is not normally available as a minor edit variable, it must also be designated through the expanded plot variables. The culmination of the logic is Logical Trip 1155.
CARD 2080XXXX, EXPANDED PLOT VARIABLE REQUEST CARD
Card 20800110
W1(I) & W2(A) EXPANDED VARIABLE REQUEST CODE = pmpmt 135
Requests the motor torque from LHS Pumps (Component 135)
Card 20800111
W1(I) & W2(A) EXPANDED VARIABLE REQUEST CODE = pmpmt 535
Requests the motor torque from RHS Pump (Component 535)
Card 20800112
W1(I) & W2(A) EXPANDED VARIABLE REQUEST CODE = pmpmt 635
Requests the motor torque from RHS Pump (Component 635)
Card 20800113
W1(I) & W2(A) EXPANDED VARIABLE REQUEST CODE = pmpmt 835
Requests the motor torque from RHS Pump (Component 835)
150 CV-150 = LHS MCP motor torque
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20515000
W1(A) ALPHANUMERIC NAME = torque
W2(A) CONTROL COMPONENT TYPE = sum
Specifies a sum component.
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = 130264.
Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20515001
W1(R) ADDITIVE CONSTANT = 0.0
No additive constant.
W2(R) GAIN FOR V1 = 1.0
W3(A) & W4(I) VARIABLE REQUEST CODE V1 = pmpmt 135
Motor torque for the LHS MCPs
151 CV-151 = RHS MCP motor torque
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20515100
W1(A) ALPHANUMERIC NAME = torque
W2(A) CONTROL COMPONENT TYPE = sum
Specifies a sum component.
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = 43229.6
Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20515101
W1(R) ADDITIVE CONSTANT = 0.0
No additive constant.
W2(R) GAIN FOR V1 = 1.0
W3(A) & W4(I) VARIABLE REQUEST CODE V1 = pmpmt 535
Motor torque for the RHS MCP
152 CV-152 = RHS MCP motor torque
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20515200
W1(A) ALPHANUMERIC NAME = torque
W2(A) CONTROL COMPONENT TYPE = sum
Specifies a sum component.
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = 43229.6
Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20515201
W1(R) ADDITIVE CONSTANT = 0.0
No additive constant.
W2(R) GAIN FOR V1 = 1.0
W3(A) & W4(I) VARIABLE REQUEST CODE V1 = pmpmt 635
Motor torque for the RHS MCP
153 CV-153 = RHS MCP motor torque
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20515300
W1(A) ALPHANUMERIC NAME = torque
W2(A) CONTROL COMPONENT TYPE = sum
Specifies a sum component.
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = 43229.6
Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20515301
W1(R) ADDITIVE CONSTANT = 0.0
No additive constant.
W2(R) GAIN FOR V1 = 1.0
W3(A) & W4(I) VARIABLE REQUEST CODE V1 = pmpmt 835
Motor torque for the RHS MCP
150 Is the LHS pump motor torque > 1.e-3 N-m (e.g., the motor has tripped)
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601500
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 150
W1(A) and W2(I) represent the LHS MCP motor torque
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 1.e-3
Arbitrarily small pump motor torque.
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
151 Is the RHS pump motor torque > 1.e-3 N-m (e.g., the motor has tripped)
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601510
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 151
W1(A) and W2(I) represent the RHS MCP motor torque
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 1.e-3
Arbitrarily small pump motor torque.
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
152 Is the RHS pump motor torque > 1.e-3 N-m (e.g., the motor has tripped)
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601520
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 152
W1(A) and W2(I) represent the RHS MCP motor torque
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 1.e-3
Arbitrarily small pump motor torque.
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
153 Is the RHS pump motor torque > 1.e-3 N-m (e.g., the motor has tripped)
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601530
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 153
W1(A) and W2(I) represent the RHS MCP motor torque
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 1.e-3
Arbitrarily small pump motor torque.
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Next, all possible combinations of 2 out of 3 pumps tripped are evaluated.
1150 Have RHS 1 and RHS 2 pumps tripped?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611500
W1(I) TRIP NUMBER = 151
RHS 1 pump motor has tripped off
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = 152
RHS 2 pump motor has tripped off
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1151 Have RHS 1 and RHS 3 pumps tripped?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611510
W1(I) TRIP NUMBER = 151
RHS 1 pump motor has tripped off
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = 153
RHS 3 pump motor has tripped off
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1152 Have RHS 2 and RHS 3 pumps tripped?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611520
W1(I) TRIP NUMBER = 152
RHS 2 pump motor has tripped off
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = 153
RHS 3 pump motor has tripped off
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1153 Have the LHS or RHS 1 and RHS 2 pumps tripped?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611530
W1(I) TRIP NUMBER = 150
LHS pump motor has tripped off
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1150
RHS 1 and RHS 2 pump motors have tripped off
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1154 Have the RHS 1 and RHS 3 or RHS 2 and RHS 3 pumps tripped?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611540
W1(I) TRIP NUMBER = 1151
RHS 1 and RHS 3 pump motor have tripped off
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1152
RHS 2 and RHS 3 pump motor have tripped off
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1155 Have the 2/3 pumps tripped on either the LHS or the RHS? This trip indicates whether 2 of 3 MCPs have tripped on either side of the reactor.
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611550
W1(I) TRIP NUMBER = 1153
LHS or RHS 1 and RHS 2 pump motors have tripped off
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1154
RHS 1 and RHS 3 or RHS 2 and RHS 3 pump motors have tripped off
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Low flow in MCPs
Low flow (< 5,000 m3/hr) in 2 out of 3 MCPs will be monitored by examining the average flowrate through the pumps. Control Variables are used to evaluate the volumetric flow near the pumps. Logical Trips are used to evaluate whether 2 out of 3 pumps are simultaneously at low flow conditions. The culmination of the logic is Logical Trip 1165.
535 CV-535 = v A (3600 s/hr) = [m3/hr]
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20553500
W1(A) ALPHANUMERIC NAME = lhs_mcp
W2(A) CONTROL COMPONENT TYPE = mult
Specifies a multiplier component.
W3(R) SCALING FACTOR = 3600.0
Converts m3/s to m3/hr.
W4(R) INITIAL VALUE = 22941.06
Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20553501
W1(A) & W2(I) VARIABLE REQUEST CODE V1 = velf 135010000
Specifies the cell center liquid velocity in the lhs MCP.
W3(A) & W4(I) VARIABLE REQUEST CODE V2 = avol 135010000
Specifies the cell flow area in the lhs MCP.
536 CV-536 = v A (3600 s/hr) = [m3/hr]
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20553600
W1(A) ALPHANUMERIC NAME = rhs_mcp1
W2(A) CONTROL COMPONENT TYPE = mult
Specifies a multiplier component.
W3(R) SCALING FACTOR = 3600.0
Converts m3/s to m3/hr.
W4(R) INITIAL VALUE = 7643.9
Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20553601
W1(A) & W2(I) VARIABLE REQUEST CODE V1 = velf 535010000
Specifies the cell center liquid velocity in the rhs 1 MCP.
W3(A) & W4(I) VARIABLE REQUEST CODE V2 = avol 535010000
Specifies the cell flow area in the rhs 1 MCP.
537 CV-537 = v A (3600 s/hr) = [m3/hr]
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20553700
W1(A) ALPHANUMERIC NAME = rhs_mcp2
W2(A) CONTROL COMPONENT TYPE = mult
Specifies a multiplier component.
W3(R) SCALING FACTOR = 3600.0
Converts m3/s to m3/hr.
W4(R) INITIAL VALUE = 7643.9
Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20553701
W1(A) & W2(I) VARIABLE REQUEST CODE V1 = velf 635010000
Specifies the cell center liquid velocity in the rhs 2 MCP.
W3(A) & W4(I) VARIABLE REQUEST CODE V2 = avol 635010000
Specifies the cell flow area in the rhs 2 MCP.
538 CV-537 =v A (3600 s/hr) = [m3/hr]
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20553800
W1(A) ALPHANUMERIC NAME = rhs_mcp3
W2(A) CONTROL COMPONENT TYPE = mult
Specifies a multiplier component.
W3(R) SCALING FACTOR = 3600.0
Converts m3/s to m3/hr.
W4(R) INITIAL VALUE = 7643.9
Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20553801
W1(A) & W2(I) VARIABLE REQUEST CODE V1 = velf 835010000
Specifies the cell center liquid velocity in the rhs 3 MCP.
W3(A) & W4(I) VARIABLE REQUEST CODE V2 = avol 835010000
Specifies the cell flow area in the rhs 3 MCP.
Next, it is determined whether the flow through any MCP is < 5000 m3/hr
160 Is the sum of the flows through the three LHS MCPs < 15,000 m3/hr (3*5,000 m3/hr)? Since the lumped LHS MCP model represents three working MCPs, it will be assumed that the average flow through all three MCPs must drop below 15,000 m3/hr.
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601600
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 535
W1(A) and W2(I) represent the flow through the 3 lumped LHS MCPs
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 15000
Since three MCPs are considered, the flow is compared to 15,000 m3/hr or 3*5000 m3/hr
W7(A) LATCH INDICATOR = n
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
161 Is the flow through RHS 1 MCP < 5000 m3/hr?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601610
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 536
W1(A) and W2(I) represent the flow through the RHS 1 MCP
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 5000.0
The flow through the RHS 1 MCP is compared to 5000 m3/hr
W7(A) LATCH INDICATOR = n
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
162 Is the flow through RHS 2 MCP < 5000 m3/hr?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601620
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 537
W1(A) and W2(I) represent the flow through the RHS 2 MCP
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 5000
The flow through the RHS 2 MCP is compared to 5000 m3/hr
W7(A) LATCH INDICATOR = n
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
163 Is the flow through RHS 3 MCP < 5000 m3/hr?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601630
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 538
W1(A) and W2(I) represent the flow through the RHS 3 MCP
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 5000
The flow through the RHS 3 MCP is compared to 5000 m3/hr
W7(A) LATCH INDICATOR = n
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Finally, 2 out of 3 logic is used to evaluate whether 2 out of 3 MCPs on either side of the reactor have low flow signals.
1160 Do the RHS 1 and RHS 2 pumps have low flow signals?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611600
W1(I) TRIP NUMBER = 161
RHS 1 MCP has a low flow signal
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = 162
RHS 2 MCP has a low flow signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1161 Do the RHS 1 and RHS 3 pumps have low flow signals?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611610
W1(I) TRIP NUMBER = 161
RHS 1 MCP has a low flow signal
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = 163
RHS 3 MCP has a low flow signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1162 Do the RHS 2 and RHS 3 pumps have low flow signals?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611620
W1(I) TRIP NUMBER = 162
RHS 2 MCP has a low flow signal
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = 163
RHS 3 MCP has a low flow signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1163 Do the LHS MCPs or RHS 1 and RHS 2 pumps have low flow signals?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611630
W1(I) TRIP NUMBER = 160
The LHS MCPs have low flow signals
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = 1160
RHS 1 and RHS 2 MCP have low flow signals
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1164 Do the RHS 1 and RHS 3 MCPs or RHS 2 and RHS 3 pumps have low flow signals?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611640
W1(I) TRIP NUMBER = 1161
RHS 1 and RHS 3 MCP have low flow signals
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = 1162
RHS 2 and RHS 3 MCP have low flow signals
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1165 Are there 2 out of 3 MCPs on either side of the reactor with low flow signals?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611650
W1(I) TRIP NUMBER = 1163
LHS MCPs or RHS 1 and RHS 2 MCP have a low flow signals
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = 1164
RHS 2 and RHS 3 MCP or RHS 1 and RHS 3 MCP have a low flow signals
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Low feedwater flow
Low feedwater flow (< 50%) relative to setpoint for the current power will be monitored by examining the
non-dimensional flowrate through the feedwater inlet. The culmination of the logic is Logical Trip 1167.
530 CV-530 = /0 = (mflowj 107000000)/(1074 kg/s)
where,
mflowj 107000000 LHS feedwater flow
1074 kg/s Steady state feedwater flow to the LHS steam drums at 4155 MW.
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20553000
W1(A) ALPHANUMERIC NAME = lhs_fw
W2(A) CONTROL COMPONENT TYPE = mult
Specifies a multiplier component. The feedwater flow is scaled according to W3, no multiplication is performed because only one variable request code is entered.
W3(R) SCALING FACTOR = 9.306x10-4
1/1074 kg/s to non-dimensionalize the LHS feedwater flow.
W4(R) INITIAL VALUE = 1.040317
Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20553001
W1(A) & W2(I) VARIABLE REQUEST CODE V1 = mflowj 107000000
Specifies the LHS feedwater flow
531 CV-531 = /0 = (mflowj 507000000)/(537 kg/s)
where,
mflowj 507000000 RHS 1 feedwater flow
537 kg/s Steady state feedwater flow to the RHS 1 steam drum at 4155 MW.
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20553100
W1(A) ALPHANUMERIC NAME = rhs_fw1
W2(A) CONTROL COMPONENT TYPE = mult
Specifies a multiplier component. The feedwater flow is scaled according to W3, no multiplication is performed because only one variable request code is entered.
W3(R) SCALING FACTOR = 1.861x10-3
1/532 kg/s to non-dimensionalize the RHS 1 feedwater flow.
W4(R) INITIAL VALUE = 2.080184
Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20553101
W1(A) & W2(I) VARIABLE REQUEST CODE V1 = mflowj 507000000
Specifies the RHS 2 feedwater flow
533 CV-533 = 50% of the mfw demand flow ~ 50% * P/P0
where,
P/P0 Load demand signal from the feedwater controllers
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20553300
W1(A) ALPHANUMERIC NAME = dmd_mfw
W2(A) CONTROL COMPONENT TYPE = mult
Specifies a multiplier component. The feedwater flow is scaled according to W3, no multiplication is performed because only one variable request code is entered.
W3(R) SCALING FACTOR = 0.5
The low feedwater signal is based on 50% of the main feedwater demand signal.
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20553301
W1(A) & W2(I) VARIABLE REQUEST CODE V1 = cntrlvar 200
Load demand signal from the drum level control system
Next, the flow feedwater flow signals for the LHS and RHS are determined.
Low feedwater flow
Low feedwater flow (< 75%) relative to setpoint for the nominal power will be monitored by examining the average flowrate through the pump. 75% of the feedwater demand flow is estimated by taking the non-dimensional load signal from the steam drum controllers and multiplying it by 0.75. The culmination of the logic is Logical Trip 1250.
534 CV-534 = 75% of the mfw demand flow ~ 75% * P/P0
where,
P/P0 Load demand signal from the feedwater controllers
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20553400
W1(A) ALPHANUMERIC NAME = dmd_mfw
W2(A) CONTROL COMPONENT TYPE = mult
Specifies a multiplier component. The feedwater flow is scaled according to W3, no multiplication is performed because only one variable request code is entered.
W3(R) SCALING FACTOR = 0.75
The low feedwater signal is based on 75% of the main feedwater demand signal.
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20553401
W1(A) & W2(I) VARIABLE REQUEST CODE V1 = cntrlvar 200
Load demand signal from the drum level control system
166 Is the LHS feedwater flow < 50% of the demand flow?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601660
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 530
W1(A) and W2(I) LHS feedwater flow
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = cntrlvar
W5(I) PARAMETER = 533
Comparison to 50% of the feedwater demand flow
W6(R) ADDITIVE CONSTANT = 0.0
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
167 Is the RHS 1 feedwater flow < 50% of the demand flow?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601670
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 531
W1(A) and W2(I) RHS 1 feedwater flow
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = cntrlvar
W5(I) PARAMETER = 533
Comparison to 50% of the feedwater demand flow
W6(R) ADDITIVE CONSTANT = 0.0
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1167 Is there a low LHS feedwater signal or a low RHS 1 feedwater signal?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611670
W1(I) TRIP NUMBER = 166
Low LHS feedwater signal
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 167
Low RHS 1 feedwater signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
High or Low Water Level in Steam Separator Drums
High (+250 mm) and low (-1000 mm) water levels relative the 0 mm level will be monitored by examining the steam drum water levels. The 0 mm level is 295 mm above the geometric center (see Section 4.3). The culmination of the high and low level logic is Logical Trip 1174.
First, the high steam drum signals are evaluated.
170 Is the LHS steam drum level > 250 mm?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601700
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 212
W1(A) and W2(I) represent the collapsed steam drum level in the LHS
W3(A) RELATIONSHIP = gt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 250.0
Current collapsed level is compared to a high level setting of 250 mm.
W7(A) LATCH INDICATOR = n
Do not latch to permit momentary high level signals to be ignored.
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
171 Is the RHS 1 steam drum level > 250 mm?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601710
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 222
W1(A) and W2(I) represent the collapsed steam drum level in the RHS 1
W3(A) RELATIONSHIP = gt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 250.0
Current collapsed level is compared to a high level setting of 250 mm.
W7(A) LATCH INDICATOR = n
Do not latch to permit momentary high level signals to be ignored.
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
173 Is the LHS steam drum level < -1000 mm?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601730
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 212
W1(A) and W2(I) represent the collapsed steam drum level in the LHS
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = -1000.0
Current collapsed level is compared to a low level setting of -1000 mm.
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
174 Is the RHS 1 steam drum level < -1000 mm?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601740
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 222
W1(A) and W2(I) represent the collapsed steam drum level in the RHS 1
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = -1000.0
Current collapsed level is compared to a low level setting of -1000 mm.
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Finally, the high and low level signals from the LHS and RHS are combined.
1171 Is there a high level signal from either the LHS or the RHS?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611710
W1(I) TRIP NUMBER = 171
High steam drum level from RHS
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 170
High steam drum level from LHS
W4(A) LATCH INDICATOR = n
Do not latch to permit momentary high level signals to be ignored.
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1173 Is there a low level signal from either the LHS or the RHS?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611730
W1(I) TRIP NUMBER = 174
Low steam drum level from RHS
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 173
Low steam drum level from LHS
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1174 Is there a low or high level signal from either the LHS or the RHS?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611740
W1(I) TRIP NUMBER = 1171
High steam drum level from the LHS or RHS
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1173
Low steam drum level from LHS or RHS
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
High Steam Drum Pressure
High steam drum pressure (> 7.36 MPa) signal will be monitored by examining the steam drum pressure. The culmination of the high pressure logic is Logical Trip 1181.
180 Is LHS steam drum pressure > 7.36 MPa?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601800
W1(A) VARIABLE CODE = p
W2(I) PARAMETER = 100010000
W1(A) and W2(I) represent the LHS steam drum pressure
W3(A) RELATIONSHIP = gt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 7.36e6
High pressure setpoint of 7.36 MPa
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
181 Is RHS 1 steam drum pressure > 7.36 MPa?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601810
W1(A) VARIABLE CODE = p
W2(I) PARAMETER = 500010000
W1(A) and W2(I) represent the RHS 1 steam drum pressure
W3(A) RELATIONSHIP = gt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 7.36e6
High pressure setpoint of 7.36 MPa
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Next, the high pressure signals from the LHS and RHS are combined together.
1181 Is there a high pressure signal from either the LHS or the RHS steam drums?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611810
W1(I) TRIP NUMBER = 180
High pressure signal from the LHS steam drum
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = 181
High pressure signal from the RHS 1 steam drum
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Loss of voltage in all 6 kV lines
The loss of the 6 kV lines is not modeled explicitly in the RELAP model. Trip 102, which signifies a loss-of-offsite power, will be used as the loss of the 6 kV lines. Consistent with the Station Blackout Analysis [ ], a 2 s delay is used between the loss of offsite power and the AZ-1 signal.
185 Has 2 s elapsed since the loss-of-offsite power?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20601850
W1(A) VARIABLE CODE = time
W2(I) PARAMETER = 0
W1(A) and W2(I) represent the transient time
W3(A) RELATIONSHIP = gt
W4(A) VARIABLE CODE = timeof
W5(I) PARAMETER = 102
W6(R) ADDITIVE CONSTANT = 2
A 2 s delay from the loss-of-offsite power is included to be consistent with the Station Blackout analysis.
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Signals of systems not modeled
The following AZ-1 Signals will not be monitored because the systems are not modeled.
• Neutron flux exceeds the trip limits in three or more LPLP zones (RELAP5 uses a point kinetics model and does not model any spatial dependency). A 110% over-power condition is considered in the FAS trip logic.
• For the case of the station blackout, the loss of the 6 kV lines is modeled with loss-of-offsite power (Trip 102).
• Reduction of the water level in the top storage tank of the control rod cooling circuit (CRCC).
• Reduction of the water flow in the CRCC distribution header to 255 kg/s.
• Reduction of the over-pressure in the CRCC distribution header to 150 kPa.
• Decrease in the ECCS top tanks to 15% below nominal.
• High gage pressure 2 kPa in the feedwater and the steam pipe compartments.
Manual AZ-1 Signal
The AZ-1 Signal is the culmination of the signals listed above. It also includes a manual signal (Trip 190).
190 Manual AZ-1 Signal will occur when time > 1.e6 s (e.g., never active)?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CAR
Card 20601900
W1(A) VARIABLE CODE = time
W2(I) PARAMETER = 0
W1(A) and W2(I) represent the current transient time
W3(A) RELATIONSHIP = gt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 1.e
This is an arbitrarily high user-specified time.
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
AZ-1 Signa
The AZ-1 Signal is the culmination of the signals listed above
1190 Is there a turbine trip signal or a MCP trip signal?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611900
W1(I) TRIP NUMBER = 1140
Turbine trip signal
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1155
MCP trip signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1191 Have any of the following signals occurred; Turbine trip, MCP trip, Low MCP flow?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611910
W1(I) TRIP NUMBER = 1190
Turbine trip or MCP trip signals
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1165
Low MCP flow signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1192 Have any of the following signals occurred; Turbine trip, MCP trip, Low MCP flow, and Low feedwater flow?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611920
W1(I) TRIP NUMBER = 1191
Turbine trip, MCP trip, or low MCP flow signals
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1167
Low feedwater signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1193 Have any of the following signals occurred; Turbine trip, MCP trip, Low MCP flow, Low feedwater flow, High or low steam drum level?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611930
W1(I) TRIP NUMBER = 1192
Turbine trip, MCP trip, low MCP flow, or low feedwater flow signals
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1174
High or Low steam drum level signals
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1194 Have any of the following signals occurred; Turbine trip, MCP trip, Low MCP flow, Low feedwater flow, High or low steam drum level, High steam drum pressure?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611940
W1(I) TRIP NUMBER = 1193
Turbine trip, MCP trip, low MCP flow, low feedwater flow, or high or low steam drum level signals
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1181
High steam drum pressure signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1195 Have any of the following signals occurred; Turbine trip, MCP trip, Low MCP flow, Low feedwater flow, High or low steam drum level, High steam drum pressure, Low of 6 kV bus (Trip 102 + 2 s delay)?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611950
W1(I) TRIP NUMBER = 1194
Turbine trip, MCP trip, low MCP flow, low feedwater flow, high or low steam drum level, or high steam drum pressure signals
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 185
Low of 6 kV bus (Trip 102 + 2 s delay)
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1196 Have any of the following signals occurred; Turbine trip, MCP trip, Low MCP flow, Low feedwater flow, High or low steam drum level, High steam drum pressure, Low of 6 kV bus (Trip 102 + 2 s delay), or Manual AZ-1 signal?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611960
W1(I) TRIP NUMBER = 1195
Turbine trip, MCP trip, low MCP flow, low feedwater flow, high or low steam drum level, high steam drum pressure, or low of 6 kV bus signals
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 190
Manual AZ-1 signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Logic is added to prevent a simultaneous AZ-1 and FAS signal. Since the control logic inserts negative reactivity most quickly during an FAS signal, a AZ-1 signal is precluded from occurring when an FAS signal is active.
1196 Have any of the following signals occurred; Turbine trip, MCP trip, Low MCP flow, Low feedwater flow, High or low steam drum level, High steam drum pressure, Low of 6 kV bus (Trip 102 + 2 s delay), Manual AZ-1 signal, and an FAS signal has not occurred
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611970
W1(I) TRIP NUMBER = 1196
Turbine trip, MCP trip, low MCP flow, low feedwater flow, high or low steam drum level, high steam drum pressure, low of 6 kV bus, or a manual AZ-1 signal
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = -1131
No FAS signal
W4(A) LATCH INDICATOR = n
Not latched to permit FAS to over-ride.
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
AZ-1 Reactivity
Upon getting an AZ-1 Signal, Table 535 is read to provide the negative reactivity versus time for inserting 24 FASR in 6-8 s and the remaining rods as in the FAS. The AZ-1 reactivity versus time is obtained from plant data .
535 CV-535 = AZ-1 Reactivity from Table 535
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20552600
W1(A) ALPHANUMERIC NAME = az1_reac
W2(A) CONTROL COMPONENT TYPE = function
Specifies a function component. The function component gets a value from a standard table.
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20552601
W1(A) & W2(I) VARIABLE REQUEST CODE V1 = time 0
Specifies the transient time.
W3(R) TABLE NUMBER = 535
The AZ-1 reactivity table.
535 AZ-1 Reactivity Table
CARD 202TTT00, TABLE TYPE AND MULTIPLIER DATA
Card 20253500
W1(A) TABLE TYPE = reac-t
react-t specifies a table type for reactivity versus time. Although the data in this table does not have to represent reactivity versus time data, it is a common practice to use this option when no units conversion is desired.
W2(I) TRIP NUMBER = 1197
CARD 202TTT01 THROUGH 202TTT99, GENERAL TABLE DATA
|
Card Number |
Time after Trip [s] |
Reactivity [$] |
|
20253501 |
0.0 |
0.0 |
|
20253502 |
1.0 |
-0.9 |
|
20253503 |
2.0 |
-1.8 |
|
20253504 |
2.4 |
-2.3 |
|
20253505 |
4.7 |
-6.8 |
|
20253506 |
7.1 |
-10.0 |
|
20253507 |
9.5 |
-12.4 |
|
20253508 |
11.9 |
-14.3 |
|
20253509 |
14.2 |
-17.0 |
Emergency Protection 3 (AZ-3) Signal
The AZ-3 Signal causes a reduction in the total power to 50% of nominal. The power is reduced at a rate of 2%/s and takes 25 s to reach the 50% power level [ ]. The following signals from the RELAP5 model will be used to initiate the AZ-3 signal.
Turbine Trip or Loss of Load
An AZ-3 Signal is initiated when one turbine trips or loss load. The turbine is not simulated in the RELAP5 model. Furthermore, the model assumes that both turbines are operating. Consequently, this trip will be monitored by a closure of one turbine control valves. Trip 1112 monitors the exclusive closure of either the RHS or LHS turbine control valve.
1142 Is either the LHS TCV or the RHS TCV (but not both) closed?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20611420
W1(I) TRIP NUMBER = 140
Closure signal for the LHS TCV
W2(A) OPERATOR = xor
RELAP5 argument for an exclusive comparison
W3(I) TRIP NUMBER = 141
Closure signal for the RHS TCV
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Signals of systems not modeled
The following AZ-3 Signal will not be monitored because the system is not modeled.
• AZ-6 Signal while operating at 50% to 100%. The AZ-6 Signal is at least two SLP-R neutron flux sensors in a single Local Power Level Protection (LPLP) zone exceeds the power setpoint (RELAP5 uses a point kinetics model and does not model spatial dependence).
Manual AZ-3 Signal
200 A manual AZ-3 signal will occur when time > 1.e6 s (e.g., never active)?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20602000
W1(A) VARIABLE CODE = time
W2(I) PARAMETER = 0
W1(A) and W2(I) represent the current transient time
W3(A) RELATIONSHIP = gt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 1.e6
This is an arbitrarily high user-specified time.
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
AZ-3 Signal
The AZ-3 signal is the culmination of all the signals listed above. The trip logic to combine those signals is listed below.
1200 Have either of the TCVs closed or is there a manual AZ-3 signal?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612000
W1(I) TRIP NUMBER = 1142
Closure of either the LHS or RHS TCV
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 200
Manual AZ-3 signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
The AZ-3 signal is the least severe CPS signal considered. Logic is added to prevent a AZ-3 power reduction signal if an FAS, AZ-1, or AZ-4 signal has occurred.
1201 Has either a FAS or AZ-1 signal occurred?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612010
W1(I) TRIP NUMBER = 1131
FAS signal
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1197
AZ-1 signal
W4(A) LATCH INDICATOR = n
Not latched to permit other protection signals to over-ride.
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1203 Is there a AZ-3 signal and a FAS or a AZ-1 signal not occurred?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612030
W1(I) TRIP NUMBER = -1201
Not a FAS or a AZ-1 signal
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = 1200
AZ-3 signal
W4(A) LATCH INDICATOR = n
Not latched to permit other protection signals to over-ride.
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Emergency Protection 4 (AZ-4) Signal
The AZ-4 Signal causes a reduction in the total power to 60% of nominal. The power is reduced at a rate of 2%/s and takes 20 s to reach the 60% power level [3,4]. The following signals from the RELAP5 model will be used to initiate the various levels of CPS.
One MCP Trip
An AZ-3 Signal occurs when one out of the three MCPs trip off. Since all three pumps are lumped together on the LHS, only three pumps can trip. The AZ-1 MCP pump trip signal already addresses the situation of all three pumps tripping. Consequently, a LHS pump trip will not be modeled here. On the RHS, one out of three logic will be used to evaluate whether the two pumps are tripped. The culmination of the logic is Logical Trip 1217.
1210 Are RHS 1 and RHS 2 MCPs operating?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612100
W1(I) TRIP NUMBER = -151
RHS 1 pump is not tripped
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = -152
RHS 2 pump is not tripped
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1211 Are RHS 1 and RHS 3 MCPs operating?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612110
W1(I) TRIP NUMBER = -151
RHS 1 pump is operating
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = -153
RHS 3 pump is operating
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1212 Are RHS 2 and RHS 3 MCPs operating?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612120
W1(I) TRIP NUMBER = -152
RHS 2 pump is operating
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = -153
RHS 3 pump is operating
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1213 Is RHS 1 tripped with RHS 2 and RHS 3 operating?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612130
W1(I) TRIP NUMBER = 151
RHS 1 pump is tripped
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = 1212
RHS 2 and RHS 3 pump are operating
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1214 Is RHS 2 tripped with RHS 1 and RHS 3 operating?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612140
W1(I) TRIP NUMBER = 152
RHS 2 pump is tripped
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = 1211
RHS 1 and RHS 3 pump are operating
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1215 Is RHS 3 tripped with RHS 1 and RHS 2 operating?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612150
W1(I) TRIP NUMBER = 153
RHS 3 pump is tripped
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = 1210
RHS 1 and RHS 2 pump are operating
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1216 Is RHS 1 tripped with RHS 2 and RHS 3 operating or is RHS 2 tripped with RHS 1 and RHS 3 operating?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612160
W1(I) TRIP NUMBER = 1213
RHS 1 tripped with RHS 2 and RHS 3 operating
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1214
RHS 2 tripped with RHS 1 and RHS 3 operating
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1217 Is RHS 1 tripped with RHS 2 and RHS 3 operating is RHS 2 tripped with RHS 1 and RHS 3 operating, or is RHS 3 tripped with RHS 1 and RHS 2 operating?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612170
W1(I) TRIP NUMBER = 1216
RHS 1 tripped with RHS 2 and RHS 3 operating or RHS 2 tripped with RHS 1 and RHS 3 operating
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1215
RHS 3 tripped with RHS 1 and RHS 2 operating
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
220 Is the LHS feedwater flow less than 75% of the feedwater demand?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20602200
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 530
W1(A) and W2(I) represent the non-dimensional LHS feedwater flow, a value of 1 is the nominal LHS feedwater flow at 4155 MW.
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = cntrlvar
W5(I) PARAMETER = 534
W1(A) and W2(I) represent 75% of the feedwater demand flow
W6(R) ADDITIVE CONSTANT = 0.0
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
221 Is the RHS 1 feedwater flow less than 75% of the feedwater demand?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20602210
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 531
W1(A) and W2(I) represent the non-dimensional RHS 1 feedwater flow, a value of 1 is the nominal RHS 1 feedwater flow at 4155 MW.
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = cntrlvar
W5(I) PARAMETER = 534
W1(A) and W2(I) represent 75% of the feedwater demand flow
W6(R) ADDITIVE CONSTANT = 0.0
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
222 Is the RHS 2 feedwater flow less than 75% of the feedwater demand?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20602220
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 531
W1(A) and W2(I) represent the non-dimensional RHS 1 feedwater flow, a value of 1 is the nominal RHS 1 feedwater flow at 4155 MW.
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = cntrlvar
W5(I) PARAMETER = 534
W1(A) and W2(I) represent 75% of the feedwater demand flow
W6(R) ADDITIVE CONSTANT = 0.0
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1220 Is either the RHS 1 or the RHS 2 feedwater flow less than 75% of the feedwater demand flow?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612200
W1(I) TRIP NUMBER = 221
Low (< 75%) RHS 1 feedwater flow signal
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 222
Low (< 75%) RHS 2 feedwater flow signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1221 Is either the LHS or the RHS feedwater flow less than 75% of the feedwater demand flow?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612210
W1(I) TRIP NUMBER = 220
Low (< 75%) LHS feedwater flow signal
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1220
Low (< 75%) RHS 1 or RHS 2 feedwater flow signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Low Water Level in Steam Separator Drums
Low (-500 mm) water level relative the 0 mm level will be monitored by examining the steam drum water levels . The 0 mm level is 295 mm above the geometric center (see Section 4.3). The culmination of this logic is Trip 1231.
230 Is the LHS steam drum level less than -500 mm?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20602300
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 212
W1(A) and W2(I) represent the LHS steam drum level signal.
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = -500 mm
Low level signal is at -500 mm
W7(A) LATCH INDICATOR = n
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
231 Is the RHS 1 steam drum level less than -500 mm?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20602310
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 222
W1(A) and W2(I) represent the RHS 1 steam drum level signal.
W3(A) RELATIONSHIP = lt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = -500 mm
Low level signal is at -500 mm
W7(A) LATCH INDICATOR = n
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1231 Are the LHS or the RHS steam drum levels less than -500 mm?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612310
W1(I) TRIP NUMBER = 231
Low level (-500 mm) signals from the RHS 1 and RHS 2 steam drums
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 230
Low level (-500 mm) signal from the LHS steam drum
W4(A) LATCH INDICATOR = n
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
High Water Level in Steam Separator Drums
High (+100 mm) water level relative the 0 mm level will be monitored by examining the steam drum water levels . The 0 mm level is 295 mm above the geometric center (see Section 4.3). The culmination of this logic is Trip 1231.
233 Is the LHS steam drum level greater than 100 mm?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20602330
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 212
W1(A) and W2(I) represent the LHS steam drum level signal.
W3(A) RELATIONSHIP = gt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 100 mm
High level signal is at 100 mm
W7(A) LATCH INDICATOR = n
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
234 Is the RHS 1 steam drum level greater than 100 mm?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20602340
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 222
W1(A) and W2(I) represent the RHS 1 steam drum level signal.
W3(A) RELATIONSHIP = gt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = +100 mm
High level signal is at +100 mm
W7(A) LATCH INDICATOR = n
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1233 Are the LHS or the RHS 1 steam drum level greater than 100 mm?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612330
W1(I) TRIP NUMBER = 233
High level (100 mm) signal from the LHS steam drum
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 234
High level (100 mm) signal from the RHS 1 steam drum
W4(A) LATCH INDICATOR = n
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
High or Low Water Level in Steam Separator Drums
The high (+100 mm) and low (-500 mm) water level signals are combined into a signal level signal in this logical trip.
1234 Are the LHS or the RHS steam drum levels greater than 100 mm or less than -500 mm?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612340
W1(I) TRIP NUMBER = 1233
High level (100 mm) signals
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1231
Low level (-500 mm) signals
W4(A) LATCH INDICATOR = n
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Low flow in MCPs
Low flow (< 5000 m3/hr) in any of the MCPs will be monitored by examining the average flowrate through the pump. Since the LHS includes three lumped pumps and low flow condition was already sensed for the AZ-1 Signal, a low flow signal will not be calculated for the LHS. The culmination of the logic is Logical Trip 1141.
1240 Is the RHS 1 or RHS 2 MCP flow < 5000 m3/hr?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612400
W1(I) TRIP NUMBER = 161
RHS 1 low MCP flow signal
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 162
RHS 2 low MCP flow signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1241 Is the RHS 1, RHS 2, or RHS 3 MCP flow < 5000 m3/hr?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612410
W1(I) TRIP NUMBER = 1240
RHS 1 or RHS 2 low MCP flow signal
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 163
RHS 3 low MCP flow signal
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
Signals of systems not modeled
The following AZ-4 Signals will not be monitored because the systems are not modeled.
• AZ-6 Signal while operating at 50% to 100%. The AZ-6 Signal is at least two SLP-R neutron flux sensors in a single Local Power Level Protection (LPLP) zone exceeds the power setpoint (RELAP5 uses a point kinetics model and has not spatial dependency).
Manual AZ-4 Signal
250 The manual AZ-4 signal will occur when time > 1.e6 s (e.g., never active)?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20602500
W1(A) VARIABLE CODE = time
W2(I) PARAMETER = 0
W1(A) and W2(I) represent the current transient time
W3(A) RELATIONSHIP = gt
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 1.e6
This is an arbitrarily high user specified time.
W7(A) LATCH INDICATOR = l
W8(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
AZ-4 Signal
The AZ-4 Signal is the culmination of the signals listed above.
1250 Have 1 out of 3 of the RHS MCPs tripped or is there low (< 75%) feedwater flow?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612500
W1(I) TRIP NUMBER = 1217
1 out of 3 MCP trip
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1221
Low (< 75%) feedwater flow
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1251 Have any of the following signals occurred; 1 out of 3 of the RHS MCPs tripped; Low (< 75%) feedwater flow; or Low or High (< -500 mm and 100 mm) steam drum level?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612510
W1(I) TRIP NUMBER = 1250
1 out of 3 MCP trip or low (< 75%) feedwater flow
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1234
Low or high (< -500 mm or +100 mm) steam drum level signals
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1252 Have any of the following signals occurred; 1 out of 3 of the RHS MCPs tripped; Low (< 75%) feedwater flow; Low (< -500 mm) steam drum level; or Low (< 5000 m3/hr) MCP flow?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612520
W1(I) TRIP NUMBER = 1251
1 out of 3 MCP trip, low (< 75%) feedwater flow, or low (< -500 mm) steam drum level
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1241
Low (< 5000 m3/hr) MCP flow
W4(A) LATCH INDICATOR = l
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
The AZ-4 signal is less severe than the FAS, AZ-1, and the AZ-3 CPS signals. Logic is added to prevent a AZ-4 signal if an FAS, AZ-1, or a AZ-3 signal has occurred.
1253 Has either a FAS or AZ-1 signal occurred?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612530
W1(I) TRIP NUMBER = 1131
FAS signal
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1197
AZ-1 signal
W4(A) LATCH INDICATOR = n
Not latched to allow FAS or AZ-1 to over-ride
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1254 Has either a FAS, AZ-1, or a AZ-3 signal occurred?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612540
W1(I) TRIP NUMBER = 1203
AZ-3 signal
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 1253
FAS or AZ-1 signal
W4(A) LATCH INDICATOR = n
Not latched to allow FAS or AZ-1 to over-ride
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1255 Have any of the following signals occurred; 1 out of 3 of the RHS MCPs tripped; Low (< 75%) feedwater flow; Low (< -500 mm) steam drum level; Low (< 5000 m3/hr) MCP flow; Manual AZ-4 signal?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612550
W1(I) TRIP NUMBER = 1252
1 out of 3 MCP trip, low (< 75%) feedwater flow, low (< -500 mm) steam drum level, or low (< 5000 m3/hr) MCP flow
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 250
Manual AZ-4 signal
W4(A) LATCH INDICATOR = n
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
1256 Have any of the following signals occurred; 1 out of 3 of the RHS MCPs tripped; Low (< 75%) feedwater flow; Low (< -500 mm) steam drum level; Low (< 5000 m3/hr) MCP flow; Manual AZ-4 signal; and no FAS or AZ-1 signal!
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20612560
W1(I) TRIP NUMBER = 1255
1 out of 3 MCP trip, low (< 75%) feedwater flow, low (< -500 mm) steam drum level, or low (< 5000 m3/hr) MCP flow, or manual AZ-4 signal
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = -1254
No FAS, AZ-1, or AZ-3 signals
W4(A) LATCH INDICATOR = n
W5(R) TIMEOF QUANTITY (s) = It was set to either true (0.0) or false (-1.0) at the initiation of the transient
AZ-3 and AZ-4 Power Reduction Logic
The CPS logic for the RBMK-1500 is very complicated and is controlled by a special plant process computer. The AZ-3 and AZ-4 Signals result in a reduction in the core power to 50% or 60% of the nominal power, respectively. A simple PI controller will be used to reduce the reactor power following an AZ-3 or AZ-4 Signal. Reactivity will be added to support a 2%/s power reduction [ ].
The power error signal is generated as follows,
e(t) = ( Pset - Pact )
where,
e(t) power error signal
Pset setpoint for the reactor power
Pact actual reactor power
A proportional-integral control is applied to the error signal as follows,
U = ap {e(t) + 1/t òe(t)dt}
where,
U Reactivity command signal
ap Coefficient of proportionally
Power Signals, Pact
The core power level is evaluated and lagged to eliminate numerical sensitivities.
550 CV-550 = P/P0 = (rktpow 0)/4.2e9 W
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20555000
W1(A) ALPHANUMERIC NAME = power
W2(A) CONTROL COMPONENT TYPE = constant
W3(R) SCALING FACTOR = 1.0
For a constant component, this quantity is the constant value. No additional words are entered on this card, and cards 205CCC01 through 205CCC09 or 205CCCC1 through 205CCCC9 are not entered.
Core power setpoints, Pset
The power setpoint be prescribed to give a 2%/s decrease in power to either 50% of 60%. Trip 1203 (AZ-3)
and Trip 1256 (AZ-4) will be used to signal the actuation of the power decrease logic.
551 CV-551 = 0.5 if the AZ-3 is true and 0.0 if it is false
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20555100
W1(A) ALPHANUMERIC NAME = az-3
W2(A) CONTROL COMPONENT TYPE = tripunit
Specifies a trip unit to convert a trip signal into a control variable.
W3(R) SCALING FACTOR = 0.5
A 0.5 multiplier is used to establish a power run-back to the 50% level.
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20555101
W1(R) TRIP NUMBER = 1203
AZ-3 trip signal
552 CV-552 = 0.6 if the AZ-4 signal is true and 0.0 if it is false
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20555200
W1(A) ALPHANUMERIC NAME = az-4
W2(A) CONTROL COMPONENT TYPE = tripunit
Specifies a trip unit to convert a trip signal into a control variable.
W3(R) SCALING FACTOR = 0.6
A 0.6 multiplier is used to establish a power run-back to the 60% level.
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20555201
W1(R) TRIP NUMBER = 1256
AZ-4 trip signal
Next determine if a AZ-3 or AZ-4 signal has occurred.
553 CV-553 = 1 if an AZ-3 or AZ-4 signal has occurred or 0 if no signal has occurred.
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20555300
W1(A) ALPHANUMERIC NAME = az-3_4
W2(A) CONTROL COMPONENT TYPE = stdfnctn
Specifies a standard function to evaluate the maximum of two signals
W3(R) SCALING FACTOR = 2.0
A 2.0 multiplier is applied to either the 0.5*AZ-3 or 0.6*AS-4 level. This will generate either 1.0 or 1.2. Since minimum and maximum limits are placed on the output from this control variable, the output is 1.0 if either an AZ-3 or AZ-4 signal has occurred.
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
W6(I) LIMITER CONTROL = 3
3 means both minimum and maximum limits are to be imposed.
W7(R) MINIMUM VALUE = 0.0
W8(R) MAXIMUM VALUE = 1.0
The range of minimum and maximum will allow this control variable to be used as a multiplier to logic that evaluates reactivity addition during an AZ-3 or AZ-4 CPS signal.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Cards 20555301-302
W1(R) FUNCTION = max
Maximum function signal
W2(A) & W3(I) VARIABLE REQUEST CODE V1 = cntrlvar 551
Specifies a AZ-3 signal has occurred.
W4(A) & W5(I) VARIABLE REQUEST CODE V2 = cntrlvar 552
Specifies a AZ-4 signal has occurred.
Next, the 2%/s power decrease is calculated. This requires knowing the current timestep size, dt. dt is not normally available. Consequently, it must be requested as an additional control plot variable. The reduction in power is evaluated as follows,
PsetN+1 = PsetN - 0.02*dt
where,
PsetN+1 New time non-dimensional power setpoint
PsetN Old time non-dimensional power setpoint
CARD 2080XXXX, EXPANDED PLOT VARIABLE REQUEST CARD
Card 20800001
W1(I) & W2(A) EXPANDED VARIABLE REQUEST CODE = dt 0
Requests the timestep size
Non-dimensionalize the core power coming out of the reactor physics package as,
554 CV-554 = 0.02 * dt (if AZ-3 or AZ-4 is active) or 0.0 (if no AZ-3 or AZ-4 signal)
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20555400
W1(A) ALPHANUMERIC NAME = delt_p
W2(A) CONTROL COMPONENT TYPE = mult
Specifies a multiplier variable.
W3(R) SCALING FACTOR = 0.02
Specifies the gain of 2%/s.
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20555401
W1(A) & W2(I) VARIABLE REQUEST CODE V1 = cntrlvar 553
This variable is set to 1 if an AZ-3 or AZ-4 trip is active or 0 if they are inactive.
W3(A) & W4(I) VARIABLE REQUEST CODE V2 = dt 0
Specifies the timestep size.
555 CV-555 = -0.02* Dts
where,
Dts time since the AZ-3 or AZ-4 signal
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20555500
W1(A) ALPHANUMERIC NAME = delt_p
W2(A) CONTROL COMPONENT TYPE = sum
Specifies a sum variable.
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20555501-02
W1(R) ADDITIVE CONSTANT = 0.0
No additive constant.
W2(R) GAIN FOR V1 = 1.0
W3(A) & W4(I) VARIABLE REQUEST CODE V1 = cntrlvar 555
This variable is set to 1 if an AZ-3 or AZ-4 trip is active or 0 if they are inactive.
W5(R) GAIN FOR V2 = -1.0
W6(A) & W7(I) VARIABLE REQUEST CODE V2 = cntrlvar 554
Specifies the timestep size times 0.02 if an AZ-3 or AZ-4 trip has occurred. Otherwise, it is zero.
556 CV-556 = 1 - 0.02* Dts
where Dts time since the AZ-3 or AZ-4 signal
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20555600
W1(A) ALPHANUMERIC NAME = p_set
W2(A) CONTROL COMPONENT TYPE = sum
Specifies a sum variable.
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20555601
W1(R) ADDITIVE CONSTANT = 1.0
The nominal, non-dimensional power (e.g., 1) is subtracted by the 2%/s signal.
W2(R) GAIN FOR V1 = 1.0
W3(A) & W4(I) VARIABLE REQUEST CODE V1 = cntrlvar 555
0.02* Dts, where Dts time since the AZ-3 or AZ-4 signal.
Finally, the power setpoint is calculated. It is limited to 50% and 60% of nominal power for the AZ-3 and AZ-4 signals, respectively.
557 CV-557 = max{50% if an AZ-3 signal is active, 60% if an AZ-4 signal is active, and the Power reduction signal (Control variable 556, 1 - 0.02* Dts) }
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20555700
W1(A) ALPHANUMERIC NAME = min_pow
W2(A) CONTROL COMPONENT TYPE = stdfnctn
Specifies a standard function to evaluate the maximum of two signals
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
W6(I) LIMITER CONTROL = 3
3 means both minimum and maximum limits are to be imposed.
W7(R) MINIMUM VALUE = 0.0
W8(R) MAXIMUM VALUE = 1.0
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Cards 20555701-703
W1(R) FUNCTION = max
Maximum function signal
W2(A) & W3(I) VARIABLE REQUEST CODE V1 = cntrlvar 551
Specifies a AZ-3 signal has occurred.
W4(A) & W5(I) VARIABLE REQUEST CODE V2 = cntrlvar 552
Specifies a AZ-4 signal has occurred.
W6(A) & W7(I) VARIABLE REQUEST CODE V2 = cntrlvar 556
Specifies the power reduction signal from an AZ-3 or AZ-4 trip, if present.
Power mismatch signal, e(t)
The power mismatch signal is only generated when either AZ-3 or AZ-4 is true. The difference between the actual non-dimensional power and the setpoint is calculated as follows,
e(t) = ( Pset - Pact ) Power error signal
558 CV-558 = e(t) = ( Pset - Pact ) Power error signal
where Pset set power (Control Variable 557)
Pact actual power (Control Variable 550)
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20555800
W1(A) ALPHANUMERIC NAME = error
W2(A) CONTROL COMPONENT TYPE = sum
Specifies a sum variable.
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20555801-02
W1(R) ADDITIVE CONSTANT = 0.0
W2(R) GAIN FOR V1 = 1.0
W3(A) & W4(I) VARIABLE REQUEST CODE V1 = cntrlvar 557
Power setpoint
W5(R) GAIN FOR V1 = -1.0
W6(A) & W7(I) VARIABLE REQUEST CODE V1 = cntrlvar 550
Current, non-dimensional reactor power signal
The error signal is multiplied by zero if there has not been an AZ-3 or AZ-4 signal.
559 CV-559 = e(t) * 1, if there is an AZ-3 or AZ-4 signal or e(t) * 0, if there is not an AZ-3 or AZ-4 signal
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20555900
W1(A) ALPHANUMERIC NAME = error
W2(A) CONTROL COMPONENT TYPE = mult
Specifies a multiplier variable.
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20555901
W1(A) & W2(I) VARIABLE REQUEST CODE V1 = cntrlvar 553
This variable is set to 1 if an AZ-3 or AZ-4 trip is active or 0 if they are inactive.
W3(A) & W4(I) VARIABLE REQUEST CODE V2 = cntrlvar 558
Specifies the power error signal.
Integral Power Mismatch Signal, 1/t òe(t)dt
The integral of the power mismatch signal is generated next. Separate signals are generated for the LHS TCV and the RHS TCV. The time constant was empirically derived during a manual AZ-3 and AZ-4 scram to give stable response.
556 CV-556 = 1/t òe(t)dt = 1/5 òe(t)dt
where,
t = 5 s time constant
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20556000
W1(A) ALPHANUMERIC NAME = int_err
W2(A) CONTROL COMPONENT TYPE = integral
Specifies an integral variable.
W3(R) SCALING FACTOR = 0.2
Specifies an empirically derived gain of 1/5 s.
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20556001
W1(A) & W2(I) VARIABLE REQUEST CODE V1 = cntrlvar 559
This is the power error signal from Control Variable 559.
Reactivity Control Signal
The reactivity control signal is based on combining the proportional and integral error signals.
561 CV-561 = ap { e(t)dt + 1/t òe(t)dt }
where,
ap 20.0 proportional constant derived empirically
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20556100
W1(A) ALPHANUMERIC NAME = p_cont
W2(A) CONTROL COMPONENT TYPE = sum
Specifies a sum variable.
W3(R) SCALING FACTOR = 20.0
An empirically gain of 20.
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Cards 20556101-102
W1(R) ADDITIVE CONSTANT = 0.0
W2(R) GAIN FOR V1 = 1.0
W3(A) & W4(I) VARIABLE REQUEST CODE V1 = cntrlvar 559
Proportional error signal.
W5(R) GAIN FOR V2 = 1.0
W6(A) & W7(I) VARIABLE REQUEST CODE V2 = cntrlvar 560
Integral error signal.
In case of a AZ-1 or FAS Signal should occur after a AZ-3 or AZ-4 Signal, the AZ-3 and AZ-4 reactivity signal should be eliminated. A hierarchy is given in the trip logic to allow successively higher scram signals to occur.
562 CV-562 = ap { e(t)dt + 1/t òe(t)dt } * {AZ-3 or AZ-4 Trip Signal}
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20556200
W1(A) ALPHANUMERIC NAME = p_cont
W2(A) CONTROL COMPONENT TYPE = mult
Specifies a multiplier variable.
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means no initial value calculation and W4 is used as the initial condition.
CARD 205CCC01, CONTROL COMPONENT DATA CARDS
Card 20556201
W1(A) & W2(I) VARIABLE REQUEST CODE V1 = cntrlvar 561
Proportional-integral reactivity signal.
W3(A) & W4(I) VARIABLE REQUEST CODE V2 = cntrlvar 553
AZ-3 or AZ-4 Signal.