RPS

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Author:
heidin
ID:
140724
Filename:
RPS
Updated:
2012-03-09 15:59:13
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RPS ILC
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  1. Unit Two is in Mode 2 with reactor pressure at 50 psig and all IRMs Operable and on Range 8, except for IRM G which is failed (inop trip) and bypassed. IRM Channel C High Voltage Power Supply output fails downscale. Which of the following describes the automatic protective function(s) that occur(s) due to this failure?

    A. A rod block, but no 1/2 scram wilt be generated. The rod block can be cleared by bypassing IRM Channel C.
    B. A rod block and a 1/2 scram will be generated. The rod block and 1/2 scram signal can be cleared by bypassing IRM Channel C.
    C. A rod block, but no 1/2 scram will be generated. The rod block cannot be cleared since IRM Channels C and G cannot both be bypassed.
    D. A rod block and a 1/2 scram will be generated. The rod block and 1/2 scram signal cannot be cleared since IRM Channels C and G cannot both be bypassed.
    D. A rod block and a 1/2 scram will be generated. The rod block and 1/2 scram signal cannot be cleared since IRM Channels C and G cannot both be bypassed.


    High voltage low generates an Inop trip in IRM C. The Inop trip results in both a rod block and a 1/2 scram on RPS A. Since IRM G is also a Div I IRM and is already bypassed, the rod block and 1/2 scram signals cannot be cleared. Only one Div I (or Div II) IRM can be bypassed at one time.
  2. APRM 1 indicates upscale alarm and trip
    APRM 2 indicates upscale alarm only
    APRM 3 indicates upscale alarm and trip
    APRM 4 indicates upscale alarm only

    How will the Power Range Neutron Monitoring voters respond?


    A. Voters 1, 2, 3, & 4 send a trip signal to RPS causing a full scram.
    B. Voters 1 and 3 only send a trip signal to RPS causing a full scram.
    C. Voters 1, 2, 3, & 4 send a trip signal to RPS causing a half scram only.
    D. Voters 1 and 3 only send a trip signal to RPS causing a half scram only.
    A. Voters 1, 2, 3, & 4 send a trip signal to RPS causing a full scram.


    The output of each APRM is sent to all four voters. Voters 1, 2, 3, & 4 will all sense the trip signal being generated by APRMs 1 & 3. Voter logic is 2 out of 4 to trip regardless of which APRMs are sending the trip signal. Voters 1, 2, 3, & 4 will send their trip signals to RPS channels A1, B1, A2, and B2 respectively resulting in a full reactor scram.
  3. Unit Two is operating at power with RPS distribution in the normal alignment. RPS EPA breaker #3 must be removed from service for maintenance. How would this EPA breaker be removed from service in accordance with the Operating Procedure?

    A. Shift RPS alternate power to alternate. then transfer RPS Bus A from normal to alternate power, then shutdown RPS MG Set A.
    B. Shift RPS alternate power to alternate, then transfer RPS Bus B from normal to alternate power, then shutdown RPS MG Set B.
    C. Maintain normal RPS alternate power alignment. Transfer RPS Bus A from normal to alternate power, then shutdown RPS MG Set A.
    D. Maintain normal RPS alternate power alignment, transfer RPS Bus B from normal to alternate power, then shutdown RPS MG Set B.
    B. Shift RPS alternate power to alternate, then transfer RPS Bus B from normal to alternate power, then shutdown RPS MG Set B.

    EPA Breaker #3 is on the output of RPS MG Set B; therefore, RPS Bus B must be transferred to alternate. Since the alternate source is normally from E7, if the alternate source is left on normal, both RPS distribution systems would be from the same division of power; therefore, the alternate source must first be transferred to alternate supply since E buses would remain energized.
  4. 0PT-01.1.6, Reactor Protection System Manual Scram Test, is in progress. The
    Reactor Scram System A pushbutton has been depressed.

    Which one of the following choices completes the statement below?
    The alarm(s) that will occur is/are _
    The RPS channel(s) that is/are de-energized is/are _


    A. REACTOR MANUAL SCRAM SYS A only
    A3 only

    B. REACTOR MANUAL SCRAM SYS A only
    A1, A2, and A3

    C. REACTOR MANUAL SCRAM SYS A and REACTOR AUTO SCRAM SYS A
    A3 only

    D. REACTOR MANUAL SCRAM SYS A and REACTOR AUTO SCRAM SYS A
    A1, A2, and A3
    A. REACTOR MANUAL SCRAM SYS A only A3 only



    The RPS trip system logics are normally energized. It is a fail-safe system such that de-energizing a trip system causes a trip in that system. There are two RPS trip systems. Trip system A and Trip system B. Each trip system contains two auto trip channels and one manual trip channel. (A1/A2/A3 and B1/B2/B3). If any one trip channel in each system de-energizes, a full scram will occur. With the 'A' Scram pushbutton depressed, the A3 trip channel has de-energized the A RPS trip system. The alarm would be a manual not auto trip. There are PTs that have a manual action that does cause the Auto scram alarm (PT-01.1.7).
  5. Unit One is performing 0GP-02, Approach to Criticality and Pressurization of the Reactor, with the following plant conditions:

    MSIVs are open
    Inboard Drain Isolation valve, B21-F016, is open
    Outboard Drain Isolation valve, B21-F019, is open

    Which one of the following identifies the plant response to opening the feeder breaker to 1A RPS MG set?


    A. The AC solenoids on the Inboard MSIVs and the DC solenoids on the Outboard MSIVs de-energize. The B21-F016 closes.
    B. The AC solenoids on the Inboard MSIVs and the DC solenoids on the Outboard MSIVs de-energize. The B21-F019 closes.
    C. The DC solenoids on the Inboard MSIVs and the AC solenoids on the Outboard MSIVs de-energize. The B21-F016 closes.
    D. The DC solenoids on the Inboard MSIVs and the AC solenoids on the Outboard MSIVs de-energize. The B21-F019 closes.
    A. The AC solenoids on the Inboard MSIVs and the DC solenoids on the Outboard MSIVs de-energize. The B21-F016 closes.



    Opening the feeder breaker to the 'A' RPS MG set will cause RPS bus 'A' to deenergize. RPS MG Flywheel action will not keep the bus energized. A half Group 1 A1/A2 MSIV isolation occurs due to loss of power to isolation logic. The Inboard steam line drain and Div 1 reactor sample valve, F016, will close.
  6. Which one of the following is the effect of a loss of the 24 VDC power supply located in RPS Analog Trip Cabinet A1?


    A. A1 remains energized from B1
    B. A1 remains energizes from A2
    C. A1 loses power and trip functions occur
    D. A1 loses power and trip functions do not occur
    B. A1 remains energizes from A2


    RPS Analog Trip Cabinet A1 output failure would be auctioneered to the output of A2, no power loss or trip functions would occur.

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