LOIT Simulator Quizzes Flashcards
The following plant conditions exist: NC lost due to a pipe rupture A EW cross connected to NC What will isolate EW to the RCPs A. PZR pressure 1900 psia B. CNTMT Press 4 psig C. IA header pressure 60 psig D. Loss of power to the EW/NC cross connect valves
B
Unit 1 in Mode 1
A NC Pump under permit
B NC pump trips with an 86 lockout
The crew has how long to restore NC flow
A. 10 min or trip the reactor, stop all RCPs and ensure CBO isolated
B. 3 min or commence a controlled shutdown
C. 3 min or trip the reactor, stop all RCPs and ensure CBO isolated
D. 10 min or commence a controlled shutdown
A
U1 at 100% power
An RCS Leak to the NC system is in progress
Which of the following would indicate a leak into the letdown HX
A. BPCV opening
B. indicated letdown flow increasing
C. NC flow from the letdown HX is decreasing
D. BPCV closing
D
Unit 1 is in Mode 1
Due to a loss of NC pumps EW A is connected to NC
Based on these conditions EW A is
A. OPERABLE as long as it is not supplying SFP Cooling
B. INOPERABLE
C. OPERABLE since the crosstie valves will auto isolate on SIAS or LO-LO EW Surge tank level
D. OPERABLE since it was analyzed to support the plant during an accident while supplying the NC system
B
EW will supply which of the following loads A. Letdown HX B. CNTMT Normal ACUs C. Normal Chillers D. Waste Gas Compressors
C
U1 100% PW Pump A removed from service for repair PW B trips on ground fault What action is required A. Trip RX and enter SPTAs B. Immediately cross tie EW and NC C. Trip turbine and stabilize
A
U1 100%
Seal Injection isolated to RCPs due to a leak in Aux Building
What effect (if any) does this have on RCP temps
A. No impact
B. HP Seal cooler inlet temp will rise 200-220 degF all other seals should increase by 70 degF
C. HP Seal cooler inlet temp will remain constant and all other seals rise by 70 degF
D. HP Seal cooler inlet temp will rise 200-220 degF and all other seals remain normal
D
U1 100% Reg Group 4 CEA drops to bottom of core The crew must A. begin a power reduction in 10 min B. have the CEA restored in 15 min C. be less than 80% in 30 min D. begin efforts to restore the CEA in 10 min
A
U1 100% CHB-UV-515 failed closed PZR Lvl is 55% All CHP have been stopped NC flow is lost To avoid securing all RCPs what must be restored A. seal injection in 10 min B. both seal injection and NC in 3 min C. NC in 3 min D. both seal injection and NC in 10 min
C
U1 100% with all rods at 150” withdrawn
A reg group 3 CEA slips to 135” withdrawn
shortly after this a reg group 5 rod falls to the bottom of the core
what must the crew do
A. monitor CPC ASI and trip RX if it approaches +0.5
B. Reduce turbine load to maintain Tavg/Tref 3 degF of each other
C. trip the RX immediately
D. monitor CPC DNBR and LPD margins to trip and trip RX if the setpoint is approached
C
When a CEA drops what action satisfies the requirement of initiating a power reduction A. when boration started B. as soon as CEA drops C. the crew notices effect on temp D, when load is taken off turbine
D
U1 100%
RX power is lowering
Tavg/Tref HI-LO alarm (4A08B)
RCS temp is lowering
One four fingered rod bottom light and LEL lit
PZR level and pressure are lowering
COLSS, CPC and PDIL alarms
CVCS is responding as expected to a lowering PZR lvl
What condition would most likely be observed in the next five minutes with no operator action
A. RX power stabilizes at ~100% with a higher Tavg
B. RX power stabilizes at ~100% with a lower Tavg
C. RX power stabilizes at 50% with a lower Tavg
D. The RX would trip on low PZR pressure
B
Following RPCB how will the crew comply with LCO 3.1.7
A. Enter the appropriate action but add 2 hrs to the completion time
B. Enter the appropriate action but add 4 hrs to the completion time
C. Do not apply the LCO for up to 2 hrs following the RPCB
D. Do not apply the LCO for up to 4 hrs following the RPCB
C
Which RRS failure would result in AMI and AWP with all switches in average A. Tcold fails HI B. Tcold fails LO C. TLI fails HI D. UIC fails LO
A
U1 100%
CEA exercising in progress
CEA #14 is being moved and CEDMCS Trouble alarm comes in
Area 3 reports the breaker for CEA #14 is tripped open
CEA 14 is indicating within 2.5” from its group
What actions are needed
A. Trip RX and enter SPTAs
B. Continue with testing
C. Perform procedure for CEAC INOPERABLE
D. Enter TS 3.1.5 for an inoperable CEA
D
U1 100% RRS Tavg is selected to Loop 2 TAVG-TREF HI-LO Alarms LOOPS TEMP HI alarms All control systems in a normal lineup what is the immediate consequence of this failure A. PZR spray full on B. CEAs driving in C. Letdown flow increasing dramatically D. SBCS permissive for all 8 valves
B
U1 5% PZR lvl controller in REMOTE AUTO PZR lvl control selector switch CH X RRS is aligned to monitor Tave Tc instrument 111Y fails HI What is the plant response A. No impact B. Letdown flow lowering C. Normally running CHP stops D. Standby CHP starts
B
U1 100% Single NI channel failed to 0% With no operator action how will DFWCS respond A. Both DFWCS will go through swapover B. SG level will rise rapidly C. No effect on the plant D. both downcomers will go closed
C
