When starting SWP with one A train pump and one B train pump in service, what combination of loads is sufficient to provide min flow requirements AND prevent exceeding max flow rates?
one A train RPCCW HX, one B train RPCCW HX, and two TPCCW HXs
When starting up SWP with only one A train pump in service, what load configuration is sufficient to maintain flow rate between min and max?
one A train RPCCW HX
What is the preferred source of dilution water for hypochlorite injection?
domestic water
When blowing down in-service SW strainer, why is it necessary to isolate or shutdown hypo injection?
prevent unmonitored release, and potentially exceeding NPDES limits when strainer backwashes
What signals or conditions will auto start a standby service water pump?
low service water discharge header pressure on associated train
What condition will auto start a FOLLOW service water pump?
low service water header pressure at the pump discharge header
What correctly describes the operation of a service water strainer when the strainer motor auto starts due to high DP?
the strainer backwash cycle will continue to operate for 3 minutes after the strainer DP becomes less than 4 psid
What is the flow path of service water within the “A” EDG enclosure?
inter coolant HX, through jacket water HX, through AOV-39A
What automatic actions occur in the service water system as a result of a SI signal?
outlet valves from the EDG open
Which of the following service water system loads isolate during a CDA?
RPCCW HXs
CDA occurs during EOP network, RSS pumps started. What should be the position of the RPCCW HX service water inlet isolation valves and the service water inlet valve to the containment recirc coolers?
RPCCW HX service inlet isolation valves CLOSED, service water inlet valves to containment recirc coolers OPEN
Both the “B” and “D” service water pumps trip and cannot be restarted. Why is it necessary to close 3SWP*MOV71B?
Closing 3SWP*MOV71B ensures the operable “A” SWP train physically separated from the inoperable “B” SWP train
Both “A” train SWP pumps trip and cannot restart. The “A” RPCCW HX SWP flow is isolated. The “C” RPCCW pump and HX must be aligned to the “A” train. What need to be done to the “C” RPCCCW pump breaker?
the breaker will need to be moved from the “B” train cubicle and racked up into the “A” train cubicle
Where are the two valves (3CHSV540 and 3CHSV541) located?
3CHS540 is in the “B” CHS pump cubicle. 3CHSV541 is in the VCT cubicle
What correctly describes the operation of a service water strainer when the strainer motor auto starts due to high DP?
the strainer backwash cycle will continue to operate for 3 minutes after strainer DP becomes less than 4 psid
Why is the service water pump discharge the preferred location for hypo injection?
prevents unmonitored release of hypo when the service water pump strainer backflushes
Why must service water pump cubicle drains be closed when intake structure water level is greater than 13 feet above sea level?
to preclude service water pump cubicle flooding up through the sump drain piping
A CDA occurred. What describes proper operation of the RSS HX service water supply valves 3SWP*MOV54A-D?
only 3SWPMOV54A and B open immediately. 3SWPMOV54C and D open after a three minute time delay
Describe the reason 3SWP*MOV54C and D (service water supply valves to the C and D RSS coolers) are time delayed from opening upon a CDA.
The time delay allows the service water piping to the HVK chiller service water booster pump piping to refill, prime, and start the booster pumps prior to 3SWP*MOV54C and D opening
