The reactor safety relief valves are installed on a high pressure ring on the main steam piping to protect the reactor from over-pressure conditions. These valves dump into the pressure suppression pools of the ACS. The two ring headers will be modeled together and connected to either end of the steam lines. To simplify the model, the high pressure ring header is not modeled and the MSVs are connected directly to the steam lines. Six MSVs are connected to the LHS of the steam line and 6 MSVs are connected to the RHS. The control logic for opening the MSVs is based on the average pressure at these two locations.
MSV Logic
The pressure setpoints are specified as follows
|
Valve Type |
Number of Valves in this Component |
Opening Pressure [MPa] |
Closing Pressure [MPa] |
Equivalent Number of Valves |
Incremental Non-Dimensional Area |
|
Bank 1 MSV |
2 |
7.4554 |
7.161 |
2.00 |
0.1667 |
|
Bank 2 MSV |
4 |
7.5537 |
7.2594 |
6.00 |
0.5000 |
|
Bank 3 MSV |
6 |
7.652 |
7.3575 |
12.00 |
1.0000 |
|
Total |
12 |
||||
CARD 205CCC00, CONTROL COMPONENT TYPE CARD
Card 20560000
W1(A) ALPHANUMERIC NAME = p_vid
W2(A) CONTROL COMPONENT TYPE = sum
Specifies a sum component.
W3(R) SCALING FACTOR = 1.0
W4(R) INITIAL VALUE = 6749928.0
Initial conditions established after steady state simulation.
W5(I) INITIAL VALUE FLAG = 0
Zero means non initial value calculation and W4 is used as the initial condition.
CARD 205CCC0X, CONTROL COMPONENT DATA CARDS
Card 20560001
W1(R) ADDITIVE CONSTANT = 0.0
W2(R) GAIN FOR V1 = 0.5
A gain of 0.5 is used to average the LHS and RHS steam line pressures
W3(A) & W4(I) VARIABLE REQUEST CODE V1 = p 100010000
Specifies the LHS steam drum pressure
Card 20560002
W1(R) GAIN FOR V2 = 0.5
A gain of 0.5 is used to average the LHS and RHS steam line pressures
W2(A) & W3(I) VARIABLE REQUEST CODE V2 = p 500010000
Specifies the RHS steam drum pressure
601 CV-601 = MSV Set Points (First Group)
CARD 206CCCC0, CONTROL COMPONENT TYPE CARD
Card 206 06010
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 600
W3(A) RELATIONSHIP = ge
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 7.4554e+6
Opening pressure of the first group of MSV
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
602 CV-602 = MSV Set Points (First Group)
CARD 206CCCC0, CONTROL COMPONENT TYPE CARD
Card 206 06020
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 600
W3(A) RELATIONSHIP = le
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 7.1613e+6
Closing pressure of the first group of MSV
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
603 CV-603 = 4 Second Delay of Valves Opening
CARD 206CCCC0, CONTROL COMPONENT TYPE CARD
Card 206 06030
W1(A) VARIABLE CODE = time
W2(I) PARAMETER = 0
W3(A) RELATIONSHIP = ge
W4(A) VARIABLE CODE = timeof
W5(I) PARAMETER = 601
W6(R) ADDITIVE CONSTANT = 4.0
4 Second Delay of Valves Opening
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
604 CV-604 = 10 Second Delay of Valves Closing
CARD 206CCCC0, CONTROL COMPONENT TYPE CARD
Card 206 06040
W1(A) VARIABLE CODE = time
W2(I) PARAMETER = 0
W3(A) RELATIONSHIP = ge
W4(A) VARIABLE CODE = timeof
W5(I) PARAMETER = 602
W6(R) ADDITIVE CONSTANT = 10.0
10 Second Delay of Valves Closing
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
CARD 206CCCC0, CONTROL COMPONENT TYPE CARD
Card 20616000
W1(A) TRIP NUMBER = 602
W2(A) OPERATOR = and
W3(A) TRIP NUMBER = 604
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
First Group of MSV Logic
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616010
W1(A) TRIP NUMBER = 1602
W2(A) OPERATOR = or
W3(A) TRIP NUMBER = 603
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
1602 Opening of the first group of MSV.
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616020
W1(A) TRIP NUMBER = 1601
W2(A) OPERATOR = and
W3(A) TRIP NUMBER = -1600
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
1603 Closing of the first group of MSV.
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616030
W1(A) TRIP NUMBER = -1602
W2(A) OPERATOR = or
W3(A) TRIP NUMBER = -1602
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
605 CV-605 = MSV Set Points (Second Group)
CARD 206CCCC0, CONTROL COMPONENT TYPE CARD
Card 206 06050
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 600
W3(A) RELATIONSHIP = ge
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 7.5537e+6
Opening pressure of the second group of MSV
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
606 CV-606 = MSV Set Points (Second Group)
CARD 206CCCC0, CONTROL COMPONENT TYPE CARD
Card 206 06060
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 600
W3(A) RELATIONSHIP = le
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 7.2594e+6
Closing pressure of the second group of MSV
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
607 CV-607 = 4 Second Delay of Valves Opening
CARD 206CCCC0, CONTROL COMPONENT TYPE CARD
Card 206 06070
W1(A) VARIABLE CODE = time
W2(I) PARAMETER = 0
W3(A) RELATIONSHIP = ge
W4(A) VARIABLE CODE = timeof
W5(I) PARAMETER = 605
W6(R) ADDITIVE CONSTANT = 4.0
4 Second Delay of Valves Opening
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
608 CV-608 = 10 Second Delay of Valves Closing
CARD 206CCCC0, CONTROL COMPONENT TYPE CARD
Card 206 06080
W1(A) VARIABLE CODE = time
W2(I) PARAMETER = 0
W3(A) RELATIONSHIP = ge
W4(A) VARIABLE CODE = timeof
W5(I) PARAMETER = 606
W6(R) ADDITIVE CONSTANT = 10.0
10 Second Delay of Valves Closing
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
CARD 206CCCC0, CONTROL COMPONENT TYPE CARD
Card 20616040
W1(A) TRIP NUMBER = 606
W2(A) OPERATOR = and
W3(A) TRIP NUMBER = 608
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
Second Group of MSV Logic
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616050
W1(A) TRIP NUMBER = 1606
W2(A) OPERATOR = or
W3(A) TRIP NUMBER = 607
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
1606 Opening of the second group of MSV.
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616060
W1(A) TRIP NUMBER = 1605
W2(A) OPERATOR = and
W3(A) TRIP NUMBER = -1604
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
1607 Closing of the second group of MSV.
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616070
W1(A) TRIP NUMBER = -1606
W2(A) OPERATOR = or
W3(A) TRIP NUMBER = -1606
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
609 CV-609 = MSV Set Points (Third Group)
CARD 206CCCC0, CONTROL COMPONENT TYPE CARD
Card 206 06090
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 600
W3(A) RELATIONSHIP = ge
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 7.6520e+6
Opening pressure of the third group of MSV
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
610 CV-610 = MSV Set Points (Third Group)
CARD 206CCCC0, CONTROL COMPONENT TYPE CARD
Card 206 06100
W1(A) VARIABLE CODE = cntrlvar
W2(I) PARAMETER = 600
W3(A) RELATIONSHIP = le
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the third variable
W6(R) ADDITIVE CONSTANT = 7.3575e+6
Closing pressure of the second group of MSV
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
611 CV-611 = 4 Second Delay of Valves Opening
CARD 206CCCC0, CONTROL COMPONENT TYPE CARD
Card 206 06110
W1(A) VARIABLE CODE = time
W2(I) PARAMETER = 0
W3(A) RELATIONSHIP = ge
W4(A) VARIABLE CODE = timeof
W5(I) PARAMETER = 609
W6(R) ADDITIVE CONSTANT = 4.0
4 Second Delay of Valves Opening
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
612 CV-612 = 10 Second Delay of Valves Closing
CARD 206CCCC0, CONTROL COMPONENT TYPE CARD
Card 206 06120
W1(A) VARIABLE CODE = time
W2(I) PARAMETER = 0
W3(A) RELATIONSHIP = ge
W4(A) VARIABLE CODE = timeof
W5(I) PARAMETER = 610
W6(R) ADDITIVE CONSTANT = 10.0
10 Second Delay of Valves Closing
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
CARD 206CCCC0, CONTROL COMPONENT TYPE CARD
Card 20616080
W1(A) TRIP NUMBER = 610
W2(A) OPERATOR = and
W3(A) TRIP NUMBER = 612
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
Third Group of MSV Logic
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616090
W1(A) TRIP NUMBER = 1610
W2(A) OPERATOR = or
W3(A) TRIP NUMBER = 611
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
1610 Opening of the third group of MSV.
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616060
W1(A) TRIP NUMBER = 1609
W2(A) OPERATOR = and
W3(A) TRIP NUMBER = -1608
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
1611 Closing of the third group of MSV.
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616110
W1(A) TRIP NUMBER = -1610
W2(A) OPERATOR = or
W3(A) TRIP NUMBER = -1610
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
SDV-A Logic
The 2 SDV-As are modeled with separate valve components with separate control logic. To control the SDV-A steam dump valves, trip control logic will be used. The SDV-A will open at 7.1613 MPa and close at 6.867 MPa. This control logic will be written as follows;
620 Is the steam line pressure greater than 7.161 MPa (Open the LHS SDV-As)?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20606200
W1(A) VARIABLE CODE = p
W2(I) PARAMETER = 175020000
W1(A) and W2(I) represent the steam line pressure at the LHS SDV-As.
W3(A) RELATIONSHIP = ge
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 7.1613e6 Pa
SDV-A pressure setpoint.
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
621 Is the steam line pressure less than 6.867 MPa (Close the LHS SDV-As)?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20606210
W1(A) VARIABLE CODE = p
W2(I) PARAMETER = 175020000
W1(A) and W2(I) represent the steam line pressure at the LHS SDV-As.
W3(A) RELATIONSHIP = le
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 6.867e6 Pa
SDV-A pressure setpoint.
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
625 Is the steam line pressure greater than 7.1613 MPa (Open the RHS SDV-As)?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20606250
W1(A) VARIABLE CODE = p
W2(I) PARAMETER = 575020000
W1(A) and W2(I) represent the steam line pressure at the RHS SDV-As.
W3(A) RELATIONSHIP = ge
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 7.1613e6 Pa
SDV-A pressure setpoint.
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
626 Is the steam line pressure less than 6.867 MPa (Close the RHS SDV-As)?
CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD
Card 20606260
W1(A) VARIABLE CODE = p
W2(I) PARAMETER = 575020000
W1(A) and W2(I) represent the steam line pressure at the RHS SDV-As.
W3(A) RELATIONSHIP = le
W4(A) VARIABLE CODE = null
W5(I) PARAMETER = 0
No comparison value is entered for the second variable
W6(R) ADDITIVE CONSTANT = 6.867e6 Pa
SDV-A pressure setpoint.
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
1619 Are the LHS SDVs already open or is the pressure greater than the opening setpoint (7.161 MPa)?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616190
W1(I) TRIP NUMBER = 1621
LHS SDV open signal
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 620
Above the LHS SDV opening setpoint
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
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616200
W1(I) TRIP NUMBER = 1619
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = -103
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
1621 Are the LHS SDVs already open or is the pressure greater than the opening setpoint (7.1613 MPa) and the pressure is not below the closing setpoint pressure?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616210
W1(I) TRIP NUMBER = 1620
LHS SDV open signal
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = -621
The pressure is not below the LHS SDV closing setpoint
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
1622 If the LHS SDV-A closed? Note, this trip is required to create a logical opposite of Trip 1621 for the required valve closing trip value in the motor valve input.
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616220
W1(I) TRIP NUMBER = -1621
Inverse of the LHS SDV open signal
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = -1621
Inverse of the LHS SDV open 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
1624 Are the RHS SDVs already open or is the pressure greater than the opening setpoint (7.1613 MPa)?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616240
W1(I) TRIP NUMBER = 1626
RHS SDV open signal
W2(A) OPERATOR = or
W3(I) TRIP NUMBER = 625
Above the RHS SDV opening setpoint
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
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616250
W1(I) TRIP NUMBER = 1624
RHS SDV open signal
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = -103
Above the RHS SDV opening setpoint
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
1626 Are the RHS SDVs already open or is the pressure greater than the opening setpoint (7.1613 MPa) and the pressure is not below the closing setpoint pressure?
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616260
W1(I) TRIP NUMBER = 1625
RHS SDV open signal
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = -626
The pressure is not below the RHS SDV closing setpoint
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
1627 If the RHS SDV-A closed? Note, this trip is required to create a logical opposite of Trip 1626 for the required valve closing trip value in the motor valve input.
CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD
Card 20616270
W1(I) TRIP NUMBER = -1626
Inverse of the RHS SDV open signal
W2(A) OPERATOR = and
W3(I) TRIP NUMBER = -1626
Inverse of the RHS SDV open 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