Lithuanian INSC Home Page International Partners Nuclear Plants Contact Us LEI Web Site
INSC Banner

Control system for the RBMK-1500 RELAP5 model


4.10 Main Coolant Pump (MCP) Trip Logic

 

The MCPs will only trip under a loss of power conditions [ ]. Trip logic is set for both manual and a loss of power condition for each individual pump.

104 The LHS MCP will trip when time > 1.e6 s (e.g., never active)?

CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD

Card 20601040

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 large 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

 

105 The RHS MCP 1 will trip when time > 1.e6 s (e.g., never active)?

CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD

Card 20601050

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 large 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

 

106 The RHS MCP 2 will trip when time > 1.e6 s (e.g., never active)?

CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD

Card 20601060

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 large 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

 

107 The RHS MCP 3 will trip when time > 1.e6 s (e.g., never active)?

CARD 206CCCC0, EXPANDED VARIABLE TRIP CARD

Card 20601070

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 large 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

 

1104 Trip Signal for LHS MCP (Manual signal or loss-of-offsite power)

CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD

Card 20611040

W1(I) TRIP NUMBER = 104

LHS MCP manual trip signal

W2(A) OPERATOR = or

W3(I) TRIP NUMBER = 102

Loss of offsite 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

 

1105 Trip Signal for RHS MCP 1 (Manual signal or loss-of-offsite power)

CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD

Card 20611050

W1(I) TRIP NUMBER = 105

RHS 1 MCP manual trip signal

W2(A) OPERATOR = or

W3(I) TRIP NUMBER = 102

Loss of offsite 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

 

1106 Trip Signal for RHS MCP 2 (Manual signal or loss-of-offsite power)

CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD

Card 20611060

W1(I) TRIP NUMBER = 106

RHS 2 MCP manual trip signal

W2(A) OPERATOR = or

W3(I) TRIP NUMBER = 102

Loss of offsite 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

 

1107 Trip Signal for RHS MCP 3 (Manual signal or loss-of-offsite power)

CARD 206CCCC0, EXPANDED LOGICAL TRIP CARD

Card 20611070

W1(I) TRIP NUMBER = 107

RHS 3 MCP manual trip signal

W2(A) OPERATOR = or

W3(I) TRIP NUMBER = 102

Loss of offsite 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