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Memory Items > Safety System Interlocks > Flashcards

Safety System Interlocks Flashcards

1
Q

What are the ADS Logic Initiation signals?

A

Level 3(130 inches) and Level 1(16.5 inches) and RHR Pump discharge pressure of 125 psig or LPCS Pump discharge pressure of 145 psig and 105 seconds

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2
Q

What type of logic does ADS utilize?

A

1) 2 out of 2 taken once 2) Time delay and Instantaneous signals both required

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3
Q

What are the RRCS Alternate Rod Insertion initiation signals?

A

1) Level 2(130 inches) 2) 1083 psig 3) Manual Arm and Depress 4) Test

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4
Q

What is the RRCS Feedwater Runback initiation signal?

A

1083 psig and APRMS not downscale within 25 seconds

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5
Q

What is the RRCS Reactor Recirc Pump Downshift initiation signal?

A

1083 psig

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6
Q

What is the RRCS Reactor Recirc Pump Trip initiation signal?

A

1) Level 2( 130 inches) 2) 1083 psig if APRMs are not downscale within 25 seconds

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7
Q

What are the RPS Bus EPA Breaker trip signals?

A

1) 132 VAC 2) 108 VAC 3) 57 Hertz

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8
Q

What is the Low Pressure Coolant Injection initiation signal?

A

1) Level 1( 16.5 inches) 2) Drywell Pressure 1.68 psig

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9
Q

What type of logic does LPCI utilize?

A

Series/Parallel Logic

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10
Q

What is the Containment Spray Logic initiation signal?

A

LPCI initiation for 10 minutes( 10 minutes 35 seconds for B) and Drywell pressure 1.68 psig and Containment pressure 7.72 psig

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11
Q

What are the RHR pump trip signals?

A

1) Under-Voltage 2) Over-Current 3) No Suction Path( A/B Only)

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12
Q

What is the maximum injection pressure for the RHR pumps?

A

280 psig

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13
Q

What conditions cause the RHR Pump Minimum Flow Valve to automatically open?

A

RHR Pump breaker closed with less than 1650 gpm for 8 seconds

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14
Q

What condition causes the RHR Pump Minimum Flow Valve to automatically close?

A

Greater than 1650 gpm

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15
Q

What are the RHR Shutdown Cooling Isolation signals?

A

1) Level 3(178 inches) 2) RHR Room high temperature( 157 F) 3) Reactor Pressure 135 psig

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16
Q

What valves are closed by the RHR Shutdown Cooling Isolation signal?

A

1) E12-F008 RHR SDC Outboard Isolation 2) E12-F009 RHR SDC Inboard Isolation 3) E12-F023 RHR A Head Spray Isolation 4) E12-F037A/B RHR SDC Upper Pool Isolations 5) E12-F053A/B RHR SDC Feedwater Isolations

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17
Q

What are the LPCS Initiation signals?

A

1) Level 1(16.5 inches) 2) High Drywell Pressure 1.68 psig

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18
Q

What type of logic does LPCS utilize?

A

Series/Parallel Logic

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19
Q

What conditions cause the LPCS Minimum Flow Valve to automatically open?

A

LPCS Pump Breaker closed with flow less than 1350 gpm

20
Q

What condition causes the LPCS Minimum Flow Valve to automatically close?

A

Greater than 1380 gpm for 5 seconds

21
Q

What condition causes a LPCS Pump breaker trip?

A

Over-current

22
Q

What is the maximum injection pressure for the LPCS Pump?

A

450 psig

23
Q

What are the HPCS initiation signals?

A

1) Level 2(130 inches) 2) High Drywell Pressure of 1.68 psig

24
Q

What type of logic does HPCS utilize?

A

Series/Parallel Logic

25
Q

What conditions cause the HPCS Minimum Flow Valve to automatically open?

A

Discharge Pressure greater than 145 psig and Flow less than 725 gpm

26
Q

What conditions cause the HPCS Minimum Flow Valve to automatically close?

A

1) Discharge Pressure less than 145 psig 2) Flow greater than 725 gpm

27
Q

What condition causes a HPCS Pump Breaker trip?

A

Over-Current

28
Q

What conditions cause the HPCS Suppression Pool Suction Valve to automatically open?

A

1) Suppression Pool High Level(18.4 feet) 2) Condensate Storage Tank Low Level(98K gallons)

29
Q

What condition causes the HPCS Injection Valve to automatically open?

A

Level 2(130 inches)

30
Q

What condition causes the HPCS Injection Valve to automatically close?

A

Level 8(219 inches)

31
Q

What is the RCIC Initiation signal?

A

Level 2(130 inches)

32
Q

What conditions cause the RCIC Minimum Flow Valve to automatically open?

A

Discharge Pressure greater than 125 psig and Discharge Flow less than 120 gpm

33
Q

What conditions cause the RCIC Minimum Flow Valve to automatically close?

A

1) Discharge Flow greater than 180 gpm 2) E51-F045 RCIC Steam Isolation closed 3) E51-F510 RCIC Trip Throttle Valve closed

34
Q

What conditions cause the RCIC Suppression Pool Suction Valve to automatically open?

A

1) Suppression Pool High Level(18.4 feet) 2) Condensate Storage Tank Low Level(98K gallons)

35
Q

What conditions produce a RCIC Isolation signal?

A

1) RCIC Room High Temperature 2) Steam Tunnel High Temperature 3) RHR Room High Temperature 4) High Steam Flow 5) High Steam Flow RHR 6) Low Steam Supply Pressure 7) Turbine Rupture Disk 8) Manual

36
Q

What is the setpoint for the RCIC Room High Temperature Isolation signal?

A

143 F

37
Q

What is the setpoint for the RCIC Steam Tunnel High Temperature Isolation signal?

A

156 F

38
Q

How long is the time delay for the RCIC Steam Tunnel High Temperature Isolation signal?

A

29 Minutes

39
Q

What is the setpoint for the RCIC RHR Room High Temperature Isolation signal?

A

157 F

40
Q

What is the setpoint for the RCIC High Steam Flow(RHR) Isolation signal?

A

52.1 Inches of Water

41
Q

What is the setpoint for the RCIC High Steam Flow Isolation signal?

A

290 Inches of Water

42
Q

What is the setpoint for the RCIC Low Steam Supply Pressure Isolation signal?

A

60 psig RCIC Steam Line Pressure

43
Q

What is the setpoint for the RCIC Turbine Rupture Disk Isolation signal?

A

10 psig

44
Q

What condition causes the RCIC Injection Valve to automatically open?

A

Level 2(130 inches)

45
Q

What condition causes the RCIC Injection Valve to automatically close?

A

Level 8(219 inches)

46
Q

What conditions produce a Control Room Ventilation Emergency Recirculation Initiation signal?

A

1) RHR LOCA( Level 1 or 1.68 psig in the Drywell) 2) LOOP 3) High Control Room Atmosphere Radiation(on the gas channel)

47
Q

What conditions produce a Control Room Venitilation and Emergency Recirculation Train Trip signal?

A

1) Loss of power or control power to any fan 2) Low flow on any running fan

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