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17 Cards in this Set
- Front
- Back
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What is the purpose of the SW system? |
The SW system supports heat removal for components required to mitigate a LOCA on one Unit while supplying normal heat loads on the opposite Unit.
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What are the normal and alternate power supplies for the Service Water Pumps? |
Pump Normal Alternate P-32A 1B-03 P-32B 1B-03 B-08 P-32C 1B-04 B-09 P-32D 2B-04 P-32E 2B-04 B-09 P-32F 2B-03 B-08 |
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What will cause an automatic start of the SW Pumps? |
- Safety Injection auto starts all 6 SW Pumps - Diesel Breaker Closure will start associated train specific SW Pumps. |
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Describe the operation of the Main SW Zurn Strainers. |
The strainer section of the Main SW Zurn coners 240 degrees of the Zurn, the inlet is the remaining 120 degrees. The backwash arm rotates through the 240 degrees removing large particles and sends them out the bottom of the strainer, where they are directed to the screen wash trench. |
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What alarms are associated with the Main SW Zurns? |
- High D/P Alarm on C01 at 2psid (reset @ 1psid) - Motor Overload - Failure of reversing limit switch |
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Describe the operation of the 6" Zurn Strainers. - Where are these Zurn Strainers located? |
The 6" Zurn Strainers have a 360 degree rotating backwash arm rotation, which scrapes large particles and sends them out the backwash outlet. Operated in continuous backwash. - PAB A/C Unit Zurn, 8' PAB near BAST's U-1 and U-2 TH Zurns, 8" AFP Tunnel South and North ends |
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What indications / alarms are available for the 6" Zurn Strainers?
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- Locally the 6" Zurn Strainers have a Red Power on Light, and an Amber light indicating Hi D/P at 5 psid (resets at 4 psid). - The high D/P will cause an alarm on C01. |
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How do the different CCW Heat Exchangers control their outlet temperature? - Why is this accomplished in this way? |
A, and D CCW Heat Exchanger SW TCV's monitor the Combined CCW outlet temperature from both heat exchangers on that unit (Unit 1 A, and B, Unit 2 C, and D). - B and C CCW Heat Exchanger SW TCV's sense the outlet of only that heat exchanger. This is due to the ability to align B and C CCW Heat Exchangers to either Unit. |
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What is the purpose of SW-LW-61 ands 62, Rad Waste SW Isolation Valves? - what components are cooled by Rad Waste SW? |
SW-LW-61 and 61 isolate non-essential SW loads during an SI on either Unit. - BDE Overhead Condenser BDE Distillate Cooler Unit 1 Blow Down Vent Condenser Unit 2 Blow Down Vent Condenser Blowdown Tank Spray (Unit 2 Only) |
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Which SW Loads have an alternate supply from a different header?
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- IA Compressors - K-3B SA Compressor - MDAFP Emergency Suction - P-38A & B Bearing Cooling and Alternate Suction Supply - CCW HX's - G-01 / G-02 Coolers and Fire Water - P-29 Emergency Suction - Battery Room Cooling - CR / CSR Ventillation |
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What SW Header supplies the Unit 1 and Unit 2 Containment Accident Fans?
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Both Units have 2 Accident Fans with SW supplied from the West Header, Unit 1 has two Accident Fans with cooling from the South Header, and Unit 2 has 2 Accident Fans with cooling from the North Header.
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What is the normal flow through a Containment Accident Fan? - What is the mechanism to raise these flows in an accident? - What is the expected flow rate during an accident? |
Normal flow is 500 - 600 gpm through each Containment Accident Fan. - - Flow through an Accident Fan during an SI should be >1000 gpm. |
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What are the power supplies for SW-2907 and SW-2908 SW Alternate Outlet Valves? - What is the consequence of one of these valves not opening on an SI? |
SW-2907 is powered from B-32 SW-2908 is powered from B-42 - Valves are in parallel on the outlet of the Containment Accident Fans, only one is required to open during an accident. |
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What alarms are associated with the Containment Accident Fans? - When are these alarms going to be received? |
There is a Low Flow Alarm @ 778 gpm on C01 - Low flow alarm is only received if there is an active SI Signal present. |
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What monitors the SW Effluent from the Containment Accident Fans?
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RE-216 monitors the effluent from all 4 accident fans, each sample valve is throttled to send an equal amount of flow through the monitor. - Also monitored by 1 and 2RE-229, SW Overboard Monitors. |
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How is fire water supplied to Containment? - What headers supply the Containment Fire Water? |
Fire water in containment is supplied by SW when shutdown. - The West Header supplies hose reels in both containment buildings, Unit 1 also has hose reels supplied by the South Header, and Unit 2 also has hose reels supplied by the North Header. |
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Which valves are affected by an SI signal?
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- Affected Unit SW-2907 / 2908 Open - SW-2816 / 4479 PAB A/C Unit SW MOV's shut - SW-2816 / 4478 WT Supply MOV's shut - SW-2927A/B SFP SW Inlet MOV's shut - SW-2930A/B SFP SW Outlet MOV's shut - SW-LW-61 and 62 Rad Waste SW Isolations shut |
