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10 Cards in this Set
- Front
- Back
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1. What is the difference between DRW and CRW?
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Answer: DRW collects non-corrosive, potentially radioactive liquid waste, having a relatively low tritium level, for processing and recycling and CRW collects non-corrosive, potentially radioactive liquid waste, having a relatively high tritium level, for processing and recycling
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2. What CRW design feature prevents safety related equipment room flooding from external sources?
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Answer: To prevent equipment room flooding from an external source, the equipment drains are capped during normal plant operation. The equipment drain caps may be removed, during controlled maintenance operations, to facilitate equipment drainage.
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3. The safety-related level indication instrumentation for the sumps in the Auxiliary Building, RHR Pump Rooms, Control Building, Diesel Generator Building, and Containment is located in a protected corner of the respective sump. What is the function of these instruments in case of a LOCA?
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Answer: In the event of a LOCA, these level devices monitor the performance of the safety-related systems, by detecting leakage significant enough to result in detectable accumulation.
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4. What actions occur within the Floor and Equipment Drains System upon Containment Isolation System Phase A signal activation?
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Answer: Containment normal sump isolation valves LFFV0095 and LFFV0096 automatically close upon receipt of a CISA signal.
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5. What actions occur within the Floor and Equipment Drains Systems in the event of a LOCA that contains any leakage from the ECCS within the auxiliary building?
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Answer: Safety-related sump pump discharge isolation valve, LFHV0105 and LFHV0106 isolate on any SIS signal and prevents the discharge of the auxiliary building and RHR DRW sump pumps from the leaving auxiliary building
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6. What is the purpose of the oily waste leak detection feature?
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Answer: This subsystem permits the detection of water accumulation that could affect the operation of diesel generators.
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7. What is the design function of a duplex sump pump arrangement?
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Answer: With a duplex arrangement, when the level of a sump reaches the high level mark of its capacity, one pump is started. Should the level continue to rise, to a high-high level, the second pump starts. A high level alarm actuates if the water rises to the high alarm level. Both pumps will continue to operate until the sump level is pumped down to low level. Each set of pumps has an alternator that alternates pump operation, to equalize the run time of the pumps.
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8. Oily waste subsystem radiation monitor LERE0059 will close Oily Waste Sumps to Oil/Water Separator Valve, LERV0059, on a high radiation alarm. Where are turbine drains routed to with LERV0059 open and where must they be routed to with LERV0059 closed?
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Answer: * LERV0059 open -- Site oil/water separator * LERV0059 closed -- Secondary Liquid Waste System Oil Interceptor
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9. Classification of a sump as OW or LRW is dependent on the type of drainage routed to it. Name the two types of drainage that results in classifying a sump as OW or LRW.
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Answer: * OW -- oily drains (oily waste) * LRW -- potentially contaminated drains secondary liquid waste
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10. Describe the automatic actions and alarms associated with an increasing level in the sanitary drainage subsystem Sanitary Lift Station.
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Answer: * First pump starts at the high level setpoint. * Second pump starts at the high-high level setpoint. * Alarm in Main Control Room at the high-high level alarm setpoint.
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