RWCU

Card Set Information

Author:
heidin
ID:
144231
Filename:
RWCU
Updated:
2012-05-29 11:45:56
Tags:
RWCU ILC
Folders:

Description:
questions
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user heidin on FreezingBlue Flashcards. What would you like to do?


  1. Unit Two reactor startup and heat up is in progress. RWCU is being used to reject water to the main condenser. The operator increases reject flow in response to rising reactor water level and the following alarms are received:

    Cleanup Filt Inlet Temp Hi (A-04 2-5)
    Non-Regen HX Disch High Temp (A-024-6)
    How will RWCU respond?

    A. Outboard isolation valve F004 closes, and reject valve F033 closes on low system pressure.
    B. Outboard isolation valve F004 closes, and reject valve F033 remains open until closed by the operator.
    C. Inboard isolation valve F001 and outboard isolation valve F004 both close, and reject valve F033 closes on low system pressure.
    D. Inboard isolation valve F001 and outboard isolation valve F004 both close, and reject valve F033 remains open until closed by the operator.
    A. Outboard isolation valve F004 closes, and reject valve F033 closes on low system pressure.


    Alarm A-02 4-6 comes in at the isolation setpoint 135°F. This isolation signal closes only outboard isolation valve, F004. The RWCU pump trips on closure of F004. The reject path remains open to the condenser until system pressure lowers sufficiently to close the F033 valve on low upstream pressure.
  2. Which one of the following requires Health Physics Window notification prior to starting the evolution in accordance with 1OP-14.0, Reactor Water Cleanup System Operating Procedure?


    A. RWCU Reject Operation For Vessel Chemistry to radwaste
    B. Precoat of a RWCU filter
    C. Backwash of a RWCU filter only
    D. Transfer of the Backwash Receiving Tank to radwaste only
    D. Transfer of the Backwash Receiving Tank to radwaste only


    Backwashing, precoating, or rejecting do not have steps in the procedure for the operator to notify HPW prior to starting the task. Transfer of resins through the building will change dose rates considerably.
  3. Unit 2 is operating at power when BOP Bus 2C trips on bus lockout. The associated Diesel Generator auto starts and energizes its E bus. One minute later, a Reactor scram occurs. Following the scram:

    117 control rods fail to fully insert
    SLC system is intiated with both SLC pumps
    Reactor water level is lowered to + 125 inches, after SLC started

    The operator notes that the RWCU system Inboard Isolation Valve (F001) and the Outboard Isolation Valve (F004) are both closed.

    What closed the RWCU Isolation valves?

    A. F001 and F004 both closed when power was lost.
    B. F001 closed on low RPV level, F004 closed when power was lost.
    C. F001 closed on low RPV level, F004 closed when SLC was started.
    D. F001 closed when power was lost; F004 closed when SLC was started.
    A. F001 and F004 both closed when power was lost.

    Div II power was lost; NUMAC isolation
  4. Unit One (1) is operating at 80% power with the 1B RWCU pump and both filter demineralizers in service when a plant transient results in the following conditions:

    Reactor water level 110 inches
    Regenerative Heat Exchanger outlet temp 235°F
    RWCU pump room ambient temp 124°F
    RWCU inlet flow 190 gpm
    RWCU return flow 158 gpm
    Reject flow 0 gpm

    Which one of the following describes the response of the RWCU system to these conditions?


    A. The operating RWCU pump continues to run with no isolation signal.
    B. Both Group 3 Isolation valves, G31-F001 and F004, CLOSE immediately with a resultant RWCU pump trip.
    C. Both Group 3 Isolation valves, G31-F001 and F004, CLOSE after 28.5 minutes with a resultant RWCU pump trip.
    D. The outboard Isolation valve, G31-F004, only CLOSES with a resultant RWCU pump trip.
    A. The operating RWCU pump continues to run with no isolation signal.
  5. A plant heatup in progress per GP-02. The RWCU system is aligned for reject to the main condenser to control RPV water level.

    How will the RWCU system respond if RWCU Non-Regenerative Heat Exchanger outlet temperature rises above 135°F due to the reject operation?


    A.Inboard isolation valve G31-F001 only will close. Reject valve G31-F033 will close due to low pressure sensed upstream of the reject valve.
    B. Outboard isolation valve G31-F004 only will close. Reject valve G31-F033 will close due to low pressure sensed upstream of the reject valve.
    C. Inboard isolation valve G31-F001 only will close. Reject valve G31-F033 will close due to low pressure sensed downstream of the reject valve.
    D. Outboard isolation valve G31-F004 only will close. Reject valve G31-F033 will close due to low pressure sensed downstream of the reject valve.
    B. Outboard isolation valve G31-F004 only will close. Reject valve G31-F033 will close due to low pressure sensed upstream of the reject valve.

What would you like to do?

Home > Flashcards > Print Preview