RCIC

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Author:
heidin
ID:
141753
Filename:
RCIC
Updated:
2012-03-15 12:05:45
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RCIC ILC
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  1. Following a Unit Two scram, the MSIVs close. The operator attempts to start RCIC for
    injection and observes the following:

    RCIC Turbine Tripped alarm sealed in (A-03 5-3)
    RCIC Pump Disch Flow Lo alarm sealed in (A-03 3-4)
    Turbine Governor Valve E51-V9 indicates open
    Turbine Trip & Throttle Valve E51-V8 valve position indicates closed
    Turbine Trip & Throttle Valve E51-V8 actuator position indicates open

    The operator closes the E51-V8 actuator and attempts to open the Turbine Trip &
    Throttle Valve, but the valve and actuator will not open (both green). No other RCIC alarms have been received. What action is required to make RCIC available for injection?

    A. Reset the RCIC Turbine mechanical trip device locally at the turbine.
    B. Reset the Turbine Trip & Throttle Valve thermal overload at the MCC.
    C. Reset the RCIC Isolation Trip System A and B push buttons at the RTGB.
    D. Hold the control switch for the Turbine Trip & Throttle valve in close for 5 seconds to ensure latching.
    A. Reset the RCIC Turbine mechanical trip device locally at the turbine.



    Overspeed trip actuates a micro switch in the opening circuit for the TT&TV that will not allow the valve to be opened until the local trip device is reset. A thermal overload would prevent the TT&TV from being opened, but would give a RCIC valve overload alarm. An isolation signal sealed in would prevent the TT&TV from latching, but would not prevent reopening the actuator and would give alarms. The actuator must be held in close for 5 seconds after close indication is received to ensure latching, but failure todo this would not prevent the actuator from being opened.
  2. RCIC is in pressure control @ 400 gpm flow, with a cooldown rate of 50 degrees/hr. The SRO directs the RO to increase the cooldown rate to 100 degrees/hr. What action(s) should the RO take to accomplish this?
    NOTE: RCIC steam flow is maximized by maintaining 400 gpm flow against the highest achievable discharge pressure.
  3. Following a loss of feedwater, RCIC initiated on low RPV level, then subsequently shut down on high RPV level. Current status:

    RPV water level is +200", steady
    RCIC initiation white light is lit
    RCIC steam supply valve (F045) is closed
    RCIC injection valve (F013) is closed
    RCIC flow controller in Auto set at 200 gpm

    A small line break then results in drywell pressure rising above 2 psig. RPV level has dropped to +170·. The operator opens steam supply valve (F045). How will the injection valve (F013) respond, and what action will raise RCIC flow to maximum (500 GPM) flow?

    A. F013 will automatically open. The flow controller setpoint must be manually raised to 500 gpm.
    B. F013 must be manually opened by the operator. The flow controller setpoint must be manually raised to 500 gpm.
    C. F013 will automatically open. Depressing the controller PF push button will raise the flow controller setpoint to 500 gpm.
    D. F013 must be manually opened by the operator. Depressing the controller PF push button will raise the flow controller setpoint to 500 gpm.
    B. F013 must be manually opened by the operator. The flow controller setpoint must be manually raised to 500 gpm.


    The RCIC injection valve will close when the F045 valve closes at high level shutdown. The valve will not reopen automatically when F045 is reopened unless RPV level is below LL2 (+105 inches). The PF push button will raise the flow controller setpoint to only 400 gpm (and only if the controller is in Manual). To achieve a setpoint of 500 gpm requires the operator to manually raise the setpoint.
  4. RCIC was operating in a full flow test lineup (CST to CST) per PT-10.1.1, when a high drywell pressure signal results in closure of the redundant return to the CST (E41-F011) and opening of the RCIC minimum flow valve (E51-F019). The flow controller is in Auto set at 400 GPM. Which of the following describes the flow indication and the flow controller output in this mode of operation?

    A. The flow indication will be 0 gpm, the flow controller will be at its minimum output.
    B. The flow indication will be 0 gpm, the flow controller will be at its maximum output.
    C. The flow indication will be approximately 50 gpm, the flow controller will be at its minimum output.
    D. The flow indication will be approximately 50 gpm, the flow controller will be at its maximum output.
    B. The flow indication will be 0 gpm, the flow controller will be at its maximum output.


    The flow element is located in the pump discharge piping downstream of the min flow line connection; therefore, min flow is not monitored by the flow element. With the flow controller on Auto calling for 400 gpm and an actual flow of zero, the flow controller output will be trying to raise turbine speed until max rpm or 400 gpm is achieved, and is a direct acting controller.
  5. Following an automatic initiation of RCIC, reator pressure dropped from 1000 to 600 psig.

    Determine how the change in RPV pressure affects the following parameters.
    (Assume RCIC is operating as designed and no operator action is taken).


    A. RCIC flow to the reactor remains the same, RCIC pump discharge head decreases, and RCIC turbine speed decreases.

    B. RCIC flow to the reactor remains the same, RCIC pump discharge head increases, and RCIC turbine speed increases.

    C. RCIC flow to the reactor decreases, RCIC pump discharge head remains the same, and RCIC turbine speed decreases.

    D. RCIC flow to the reactor decreases, RCIC pump discharge head increases, and RCIC turbine speed remains the same.
    A. RCIC flow to the reactor remains the same, RCIC pump discharge head decreases, and RCIC turbine speed decreases.
  6. Unit 2 has experienced a small break LOCA resulting in the following conditions:

    Drywell pressure 1.5 psig
    RCIC automatically initiated on low level
    RPV level currently 101” and rising

    If the RCIC manual isolation pushbutton is depressed, what will be the respons of the RCIC system?


    A. The Steam Supply Outboard Isolation Valve, E51-F008, the RCIC Discharge Valve, E51-F012, and the Turbine Trip and Throttle Valve, V8, will close.

    B. The Steam Supply Outboard Isolation Valve, E51-F008, the RCIC Injection Valve, E51-F013, and the RCIC Steam Supply Valve, F045, will close.

    C. The Steam Supply Outboard Isolation Valve, E51-F008, the RCIC Injection Valve, E51-F013, and the Turbine Trip and Throttle Valve, V8, will close.

    D. The RCIC system will continue to operate, the manual isolation pushbutton has no effect under these conditions.
    C. The Steam Supply Outboard Isolation Valve, E51-F008, the RCIC Injection Valve, E51-F013, and the Turbine Trip and Throttle Valve, V8, will close.


    Manual isolation will only functon if an initiation signal is active (below LL2). Manual isolation only affects the Outboard valves so only the F008 closes. Any isolation is also a turbine trip so the F013 and the V8 also close.
  7. RCIC operation from the Remote shutdown Panel (RSDP) has been established per AOP-32, plant shutdown from Outside the Control Room. RPV level is currently at 212”.

    What is the current status of RCIC, and what actions are necessary to re-establish RCIC as a level control system?

    RCIC is:


    A. Shutdown with the Steam supply valve, E51-F045 CLOSED. The Turbine trip & throttle valve, E51-V8 is reset. E51-F045 will auto open at low level 2.

    B. Tripped with the Steam supply valve, E51-F045 CLOSED. The Turbine trip & throttle valve, E51-V8 must be reset at the RSDP. E51-F045 will not auto open at low level 2.

    C. Shutdown with the Steam supply valve, E51-F045 CLOSED. The Turbine trip & throttle valve, E51-V8 is reset. E51-F045 must be opened as RPV level lowers below 206”.

    D. Tripped with the Steam supply valve, E51-F045 CLOSED. The Turbine trip & throttle valve, E51-V8 must be reset at the RSDP. E51-F045 will auto open as RPV level lowers below 206”.
    C. Shutdown with the Steam supply valve, E51-F045 CLOSED. The Turbine trip & throttle valve, E51-V8 is reset. E51-F045 must be opened as RPV level lowers below 206”.


    • SD-16
    • Although the Turbine Trip and Throttle Valve does not close, a high reactor water level effectively trips the RCIC Turbine due to the closure of the Turbine Steam Supply Valve, E51-F045, whether being controlled from the RTGB or RSDP. Once the Turbine Steam Supply Valve is full closed, the RCIC Injection Valve, E51-F013 and the Minimum Flow Bypass to Suppression Pool Valve, E51-F019 automatically close (if previously open and if being controlled from the RTGB).
    • When the valve is being controlled locally, the automatic opening signal is bypassed. A high level condition will still automatically close the valve. Additionally, all valve position indications and controls are unavailble at the RTGB.
  8. Unit Two is at rated power when a faulty CST level instrument initiates a false low CST
    level input to the RCIC logic. RCIC SUCT XFER CST LO LVL annunciator is received.

    Which one of the following identifies the correct RCIC system suction valves response?

    Suppression Pool Suction Valves, E51-F029 and E51-F031, _____________.
    CST Suction Valve, E51-F010, __________.


    A. immediately auto open;
    begins to close when both suppression pool suction valves are not full closed.

    B. immediately auto open;
    begins to close after both suppression pool suction valves are full open.

    C. begin to open when CST suction valve is not full open;
    immediately auto closes.

    D. begin to open only after the CST suction valve is full closed;
    immediatley auto closes.
    B. immediately auto open; begins to close after both suppression pool suction valves are full open.


    • The normal RCIC suction valve configuration is the CST suction (F010) open and the suppression pool
    • suction valves (F029 and 31) closed. If a low CST level is sensed, with reactor pressure above the RCIC
    • isolation setpoint, the F029 and 31 will auto open. When they are both full open, the F010 will auto close.
    • If reactor pressure is below the RCIC isolation setpoint, the valves respond differently. (F029 and F031 will auto-close upon receiving an isolation signal.)
  9. Unit Two is operating at full power when a loss of DC distribution panel 4B occurs. Which one of the following identifies the effect this will have on the RCIC system and what action is required to be taken per Tech Spec 3.5.3, RCIC System?

    RCIC is ___________ for injection from the RTGB;

    Examine logs or other information, to determine if the HPCI system is out of service,
    HPCI Operability PT __________ required to be performed.


    A. unavailable
    is not

    B. unavailable
    is

    C. available
    is not

    D. available
    is
    • A. unavailable
    • is not


    The primary power source for the RCIC system is Div. II 125/250 VOC. A loss of 2-XDB causes a loss of power to the majority of the RCIC system valves. With a loss of RCIC TS have you verify HPCI operable by administrative means. This is defined as looking at the logs or other information does not require a PT to be performed.

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