Primary Coolant System Alarms

Question 1

EK-0731 – “QUENCH TANK HI TEMP”

Answer 1

Also Look at:

• Safety Valve and PORV Tailpipe temperatures
• Quench Tank pressure and level
• Any other high temperature, high pressure fluid that inputs to the Quench Tank (i.e. Letdown Hx Relief, Reactor Head Vent, S/D Cooling Relief Valve, SI Fill & Drain Relief Valve etc.)

Question 2

EK-0732 “QUENCH TANK HI PRESS”

Answer 2

Also Look At:

• Safety Valve and PORV Tailpipe temperatures
• Quench Tank level and temperature
• Any other high temperature, high pressure fluid that inputs to the Quench Tank (i.e. Letdown Hx Relief, Reactor Head Vent, S/D Cooling Relief Valve, SI Fill & Drain Relief Valve, N2, etc.)

Question 3

EK-0733 “QUENCH TANK HI-LO LEVEL”

Answer 3

Also Look At:

• Safety Valve and PORV Tailpipe temperatures
• Quench Tank level and temperature
• Any other high temperature, high pressure fluid that inputs to the Quench Tank (i.e. Letdown Hx Relief, Reactor Head Vent, S/D Cooling Relief Valve, SI Fill & Drain Relief Valve, N2, etc.)
• Quench Tank Drain Valve position CV-0148
• Quench Tank Spray Valve position CV-0155
• Quench Tank Vent Valve position CV-0152

Question 4

EK-0737 (EK-0738) “PRESSURIZER SPRAY LINE 1B (2A) LO TEMP”

Answer 4

Also Look at:

• Spray Line Temperature indications
• Loop 1B and 2A cold leg temperatures

Question 5

EK-0739 “PRESSURIZER SURGE LINE LO TEMP

Answer 5

Also Look At:

• Surge Line Temperature indication
• Loop 1 & Loop 2 Hot Leg Temperatures

Question 6

EK-0743 “PRESSURIZER PWR OPERATED RELIEF VALVE DISCH HI TEMP”

Answer 6

Also Look At:

• Tailpipe temperature indication
• Acoustical Monitor panel
• Quench Tank level, temperature, and pressure

Question 7

EK-0744 (EK-0745, EK-0746) “PRESSURIZER SAFETY VALVE RV-1039 (RV-1040, RV-1041) DISCH HI TEMP”

Answer 7

Also Look At:

• RV discharge temperature indications
• Acoustical Monitor panel
• Quench Tank level, temperature, and pressure

Question 8

EK-0760 “PRESSURIZER RELIEF MOV OVERLOAD”

Answer 8

Also Look At:

• Valve position indicating light
• Blue indicating light illuminated

Question 9

EK-0766 (EK-0772) “LOOP 1 (2) HOT LEG HI TEMP”

Answer 9

Also Look At:

• Loop T_hot panel indications
• PTR-0112/0122 T_hot indication
• Hi or low Tave indication (instrument failure)
• CVCS response

Question 10

EK-0967 “LOOP 1 LOOP 2 TAVE DEVIATION”

Answer 10

Also Look At:

• T_hot & T_cold loop panel indications
• Other T_ave Channel indication
• Loop differential temperatures
• Panel Temperature recorders

Question 11

EK-0968 (EK0969) “LOOP 1 (2) TAVE/TREF GROSS DEVIATION”

Answer 11

Also Look At:

• Temperature inputs to Tave controllers
• Compare Loop Temperature indications from Loops 1B and 2A against Loops 1A and 2B
• Response of CVCS to Pressurizer Level
• Loop DT

Question 12

EK-1120 “LOW SUB-COOLING MARGIN”

Answer 12

Also Look At:

• Compare individual loop T_colds, T_hots and PZR pressure
• Other sub-cooling margin monitor
• Verify sub-cooling using steam tables