Pre-Test Review Flashcards
Can the ADVs operate without IA?
Yes. They have a nitrogen backup
What mode will the DFWCS Master Controller be in 5 seconds after a reactor trip?
TRACKING the RTO controller
What role does PKA-M41 play in the AF System?
AFA govornor control power
AFN normal control power
When does the first MSSV lift?
1250 psig
What does pressing the SG Low Pressure Reset push button do?
It lowers the setpoint 200 psig
AFAS 1 is for #__ SG and will start ____ AF pump(s) and cycle based on level
#1 both
From where do MCCs get control power for their magnetic starters?
From downstream of the circuit breaker
If containment pressure reaches ____ psig on any two channels ____ RTCBs open.
3 psig
4 RTCBs open
If the Steam Blanketing switch is taken to the steam blanketing position, what will happen?
The RSSV and the RSCV will close
What signal does RRS send CEDMCS if selected TLI fails low?
Insert
At what header pressures do the different fire pumps start?
As pressure decreases: Jockey Pump - 104 psig Motor Pump - 95 psig Diesel Pump A - 90 psig Diesel Pump B - 85 psig
Taking the MSIV EXER/TEST switch to EXER does what?
Closes the valve to 90% open using the air operated pump
When does the MFP swap to the D MSR?
at 90%
What cools the isophase bus ducts?
TC
What happens if you depress the TEST pushbutton on a FBEVAS channel?
Complete actuation of FBEVAS and CREFAS
What is the time delay associated with start of the standby CEDM fan?
120 seconds
Which SGWL detector does DFWCS use for control?
The higher reading NR detector
What determines what’s on the SESS Panel?
This display checks which components must change status to be in their Post-ESF position.
What starts automatically on a Control Building Air Intake RU Monitor alarm?
Control Room Essential ACUs
Why does the Fuel Building Exhaust Fan have a higher capacity than the Fuel Building Supply Fans?
To maintain a negative pressure on the Fuel Building
What would happen to the Essential Chiller if operating under load and the EW pump trips?
The Essential Chiller would trip on high condenser pressure
What is the power supply to the Ex-Core NI’s?
NNN-D11 and NNN-D12
CEA movement within the Reactor Vessel requires refueling water level to be greater than or equal to ______ ft above ________________________.
23 ft above the irradiated fuel asseblies
From where does the ESOP take a suction?
The bearing oil supply header
What happens to the MSIVs on a loss of IA?
You lose the air operated pump. They’ll remain as-is and may be Fast Closed
What is the purpose in the flywheel on the RCPs?
To increase coast down time
When in Auto-Sequential or Manual-Sequential, once Group 1 CEAs reach 90”, what will happen?
Group 2 CEAs will begin to withdraw simultaneously with Group 1.
What does the TG for the MFP need to engage?
Adequate oil pressure
If Tave decreases, what signal does RRS send to CEDMCS?
Withdraw
What will happen if you take the PPCS Master Controller to 0 output?
Spray will secure
B/U heaters will energize 100%
If RVLMS indication lowers, what has happened to the void size?
It has increased
What does the main turbine trip at -3” in the MSR protect from?
Moisture carryover
What is the difference between COLSS and the CMC?
COLSS is for indications
CMC is for protection
What happens to boron concentration if CVCS IX temperature lowers?
Boron concentration will lower
When, on an up power, will the CPC value for ASI swap to a calculated value vice a canned value?
When the sum of the 3 excore detectors reaches 51%
AFN requires both suction valves to be > ____ % open to start.
80
What calibrates JCPCAL?
JSCALOR
How does a loss of PND-D28 effect CEDMCS?
You’ll get a reverse Pac-Man on the Core Mimic
What will trip off the Normal Battery Exhaust Fans?
CO2 discharge
List the CPC Aux Trips
- < 2 RCPs running
- Th saturation (19F from saturation)
- Asymmetric SG Temps
- VOPT
- Input parameters out of range
- Internal Computer Processor Faults
If SGWL transmitter fails low, what effect does it have on the DFWCS?
None
What is used to compensate excore power for shielding effects?
Tcold
When the AUTO/MAN switch for the MFP is in MAN only the _____________ can control the MFP.
potentiometer
Theres a leak in pressurizer level transmitter LT-110 variable leg. How does this effect indicated level, letdown flow, and heaters?
Indicated level will lower which will in turn lower letdown flow and trip off all heaters
A LOP occurs and starts AFB. A SIAS occurs later. What is the status of AFB?
It’ll load shed but it’ll be running again once the sequencer starts it again.
The downcomer controller is in LOCAL. The operator places the downcomer controller on the board in valve output and attempts to use the up/down arrows. Will this move the valve?
Yes
What do the background detectors in the ICI’s compensate for?
the current flow caused by non-neutron interactions
What happens to the PK Battery Room Normal Exhaust Fan if the room is flooded with Carbon Dioxide?
The fans will stop.
What happens if the selected Lpzr instrument fails high?
B/U heaters will energize (+3% insurge)
Letdown increases (Level is now higher than called for)
Normally Running Charging Pump stops ( > +15%)
If Tave fails low, how will this effect RTO in the DFWCS?
This will cause DFWCS to feed at a lower rate in RTO
What is the status of CHA-UV-524 while at 100%?
Down powered with position indication provided from a secondary power source
During holding ops, how many stages of the AR pump are in service?
both
What is RTO in DFWCS designed for?
To prevent a post-trip overcooling event
A single CEA cannot be withdrawn above the ______.
UEL (Upper Electrical Limit)
What type of detectors are the ICI’s?
Rhodium detectors
What kind of reactivity is added to the Reactor if SG pressure increases? Why?
Negative because the increase in SG pressure will increase Tc.
During a plant startup, what is AS used for?
heating the #4 heater
What is required to be running to start a RCP?
its lift oil pump
Who determines duration for alarms in fast flash and any required monitored parameters or contingency actions for an annunciator?
The CRS
How do you get Setpoint Override on the B/U heaters?
Go to OFF then ON
What cools the hydrogen coolers?
TC
Communicate alarms to the CRS ________ activity. If not previously briefed, treat alarms as ____________.
- before
- un-expected
When do we go to one Letdown Control Valve and one Letdown Back Pressure Control Valve and why?
When RCS pressure > 1200 psia to prevent from exceeding the capacity of the installed relief valve
How does QSPDS calculate upper head saturation margin?
The hottest of the top 3 unheated junction thermocouple temperatures
If the DWST becomes contaminated are there any other options we can use to supply the DW header?
We can use the Water Rec Header
What happens to pump current when its discharge valve is throttled closed?
Current will lower and stabilize at that lower value
At 7% power, what is the status of the MSR Drain Tank Hi Level Control Valve?
Failed Open
You’re selected to Tave. Tc fails high. What signal will be generated?
AMI
What happens to DNBR POL as ASI goes more positive?
DNBR POL will increase
What component in the EC system minimizes stacking?
The RHPCV
Where is the only Containment temperature detector that will read > 200F displayed?
ERFDADS
What does the red breaker light signify?
That the breaker is closed and there is continuity through the trip coil
How does a loss of IA affect SBCS?
All the SBCS valves fail closed
Who is required to be in the Control Room during refueling operations?
The RO and Responsible Engineer representative
How much time will 2.75ft in the DG FOST give you?
About 1.5 hours
How does the WC makeup valve on the surge tank fail on a loss of IA?
closed
What happens to CW on a loss of TC?
The CW Pump bearings will overheat
B CREFAS is in BYPASS. You get a valid alarm on a FBEVAS channel. What will be running?
Both trains of FBEVAS and CREFAS
Only one Aux Building Exhaust and Supply are running. What happens if you take the other Supply Unit to START?
It won’t start
How fast is rod insertion?
30”/min
possible to be 3”/min in Auto-Sequential
What happens to the Letdown Back Pressure Control Valves if Letdown is lost?
They will go closed trying to maintain pressure
What do you have to do if you get the AZ TILT alarm?
Change the addressable constant in CPCs.
At 1275#, how may SG safeties are open?
4
What happens in PPS if a single matrix relay fails?
one RTCB will open
The black and white pointer on the Pressurizer Level Controller is the __________ set point.
Remote
What is the makeup for WC?
DW
How will JSCALOR indicate if blowdown is in service with a 0 BD constant?
High
What cools the Charging Pump Room ACUs?
WC
If on SDC, a leak occurs in the SDCHX, what would happen to the EW System?
The EW Surge Tank level would rise
How do the vacuum breakers operate?
Air to open and spring to close
Reactivity Briefs should contain what three aspects of control?
Rate
Duration
Method of Control
PMS is OOS. How does this affect COLSS?
COLSS is now INOP
What happens to the feed system if you lose NBN-S01?
You lose two CD pumps which cases you to lose a MFP on low suction pressure
What happens if you lose supervisory service air to pre-action valves?
Alarms - no actuations
The air is applied to the piping to ensure piping integrity. Lowering air pressure may indicate a system breach.
What rooms are not protected by CO2?
Remote Shutdown Panel
What is the vent path for the MSR Drain Tank?
The Hot Reheat Line
The normal overload setpoint for the fuel transfer machine is _____ lbs.
800 lbs
How is TC temperature maintained?
By throttling HX outlet and bypass
RVLMS has ___ sets of heated and unheated thermocouples located in the upper head and outlet plenum per train.
8
What alarm can you expect when taking a component to override from its actuated position?
SEAS Alarm
What cools the AR pumps?
PW
What does the combo of a Reactor Trip with a low Tave do to SBCS?
it will prevent a Quick Open of the SBCS Valves
When down powering from 85% to 70%, what will the downcomer do?
nothing
The MFT trips at ________ inches of mercury.
13.5
The Load Limit light is lit. How can the turbine be controlled in this condition.
Only the Load Limit Pot will control at this time.
Smoothed Power = 99.8%. DNBR POL = 109%. LPD POL = 111%. What does the Margin Meter read?
< 2%
The margin meter reads the difference between Smoothed Power and the lowest of either Licensed Power (101.5%), DNBR POL, or
Which RCS Pressure does QSPDS monitor: Narrow Range or Wide Range?
Wide Range
Where do the SBCS valves go?
A shell - 3
B shell - 2
C shell - 1
Atmos - 2
How is a leak in the SP System detected in the Control Room?
A gross flow deviation from the supply and return header
CEA movement within the Reactor Vessel requires refueling water level to be greater than _____ feet above the _________________.
23 feet
irradiated fuel assemblies
What is the purpose in the background detector for the ICI’s?
Corrects for the signal wire
‘A’ MSIS will do what?
Close all MSIVs, one Economizer and one Downcomer in each line
When should you have GS applied?
Whenever vacuum is present
What is the purpose in the Dropped Rod Contact?
To reset the pulse counter in the Plant Computer
How does the failure of a Tc instrument affect COLSS?
There is no effect. The redundant instrument will take over.
What rod groups insert on a LLR and why?
Groups 4 and 5 because SBCS alone cannot remove all the RCS heat
You get a 2/4 on Containment Pressure at > 3 psig. What happens?
Reactor Trip
SIAS
CIAS
MSIS
What happens to COLSS NKBDELT as RCP D/P lowers?
NKBDELT will increase.
D/P does down as flow goes up. Lower D/P means more flow. More flow means higher power. Higher power means NKBDELT increases.
When does the High Log Power Trip occur?
10 -2%
What is the status of the RCP HP seal cooler inlet and outlet valves at 100% power?
Open and de-energized
How are the Class 86 Lockouts reset?
By going to the trip position
If you place the Local Mode Control Switch for the DG in OFF, will you be able to start the DG?
no
What will the PPS Power Trip Test Interlock (PTTI) trip and why?
It will trip DNBR and LPD in the event of NI switch misalignments or voltage problems.
What does the PPCS Master Controller do with its output to increase pressure?
It lowers it.
Name one CPC output.
Calibrated Neutron Flux
What signals are sent to the EHC System on a RPCB?
Setback
Runback
Increase Inhibit
How is reactor head flange leakage detected?
Flange seal pressure
What is the Pressurizer Pressure Safety valve setpoint?
2475 psia
Which forces do a thrust bearing absorb?
axial
When a MSIV slow closes what is doing the closing?
the air operated pump
If blowdown flow is lowered, how will JCPCAL read immediately after and one hour after?
JCPCAL will read lower immediately and lower again over the next hour.
The SBCS valves are open due to a normal signal. If pressure drops below the Permissive Setpoint, how will the valves close?
They will modulate closed because of the 15 second time delay that prevents a quick close of the valves.
What happens to the CVCS System on a loss of NKN-D42?
All charging pumps will stop and letdown will isolate
What would be the status of the VCT makeup system if LT226 saw 0 D/P?
It would be on continuous makeup
Are the PC pumps sequenced back on if the Class bus loses power?
No - it must be manually restarted
What in the SP System do the multipoint recorders monitor?
SP Pump bearing temperatures
If D/P goes down on a wet reference leg D/P indicator, what happens to indicated level?
it goes up
Containment Spray is designed to reduce Containment pressure by ______ in _______ hours.
Half
24
If a FBEVAS is actuated by a RU monitor, what happens to the Control Room Normal AHU?
It trips.
- You’ll get all the cross trips which means CREFAS will actuate, closing the Control Room Normal dampers which trips the ACU
If Tc is high, what CEDMCS signals will be generated?
AMI and AWP
How does the CE Heat Exchanger temperature control valve fail?
Through the HX’s and it lowers temperature
What happens to the PW System if a low discharge pressure is detected on the running pump?
The standby pump will start
When do we normally use the reactor makeup water flow alarm?
During refueling operations
Does AFB start on a CIAS?
no
What will happen to the MSIVs if you lose a PKA battery charger?
The MSIVs will remain as-is and will operate normally until the battery is depleted at which time they will Fast Close
How would one clear a Main Turbine Setback?
Lower the Load Limit Pot until the Load Limit Light illuminates.
What cools the normal chillers?
NC
Per the TRM, what mode must the LPVMS be in?
Supervisory Mode
Who has free access to the ‘at the controls’ area of the control room?
On-Shift Personnel
Ops Management
NRC Inspectors
One member of Nuclear Oversight Operations
What happens to the discharge valve of a CW pump if it trips?
It goes fully closed
When can a peer check be forgone?
During AOPs if the action must be taken immediately and there is no peer checker available.
What happens to the mass flow rate in a density compensated steam flow instrument if steam pressure rises?
Mass flow rate goes up
You actuate a BOP-ESFAS trip from B05. What lights will be lit?
Actuate, RST, MAN
How often should the RO do a thorough evaluation of the control room?
Every 2 hours minimum
What is the purpose of the Local/Remote switches on the B Class components?
To prevent spurious actuations during a fire
Volts/Hz Regulator operates to ________ voltage.
limit
How long do the Class and Non-Class batteries last?
2 hours
LSPI A has lost control power. You get a SIAS. What lights are lit on the SESS panel for the LPSI A pump?
The white and blue lights are lit.
If a leak occurs in the RCS, how will indicated leak rate and actual leak rate relate on the ERFDADS screen?
Actual leak rate will exceed indicated leak rate for 7.5 minutes
What is needed to get a LOFP RPCB?
Low Control Oil Pressure (75 psig) on 2/3 switches for the same feed pump
Do the Normal Supply and Exhaust dampers for the Aux Building have override?
No
What happens when a Class 480 LC transformer trips on over current?
Both the LC B2 breaker and the 4160V transformer supply breaker open
What is the minimum level in the RDT? Why?
52% to provide a quench volume for the Pressurizer Safeties
When does the RESET lamp illuminate on a BOP-ESFAS trip initiated by a RU monitor?
When the RU monitor alarm condition clears
From where can you immediately secure a CW Pump?
The Control Room
Locally at the breaker
As IA pressure lowers, what occurs first: IA Lo pressure alarm or start of the standby IA Compressors?
Standby Compressors first followed by the low pressure alarm
How many starts is each DG starting air receiver sized for?
5
What will a single upper detector excore safety monitor failing high cause?
VOPT
High LPD
Low DNBR
How does a loss of NKN-D42 effect Charging Pumps and Letdown flow?
All charging pumps will stop
Letdown flow will isolate (high temp RHX)
What would be the status of NNN-D15 and NNN-D16 in Unit 1 with a LOOP and a SIAS?
Both de-energized
IA to the Containment isolates on a _________.
CSAS
CETs monitor _______ plenum temperature and enter from the _________ of the core.
Outlet
Bottom
Why is ASN-HV-14 kept open?
To prevent a loss of GS in the event of a MSIS
What does the DG need to auto close its output breaker?
DG at rated speed and voltage
normal and alternate breakers open for PB bus
no 86 lockouts
What would happen if the DG TG was not fully disengaged while attempting to start the DG?
The DG would not turn over at all
What does the SG Low Flow trip protect against?
RCP Shaft Shear
In the EHC System, which error signal controls at high rotor speed and which at low rotor speed?
Acceleration Error controls at low rotor speed
Speed Error controls at high rotor speed
What will isolate NC to the Containment?
CSAS
What safety device is installed on the SGs in the event of a main steam line break?
Flow restrictors
What system provides the operator with indication of the approach to, the existence of, and the recovery from an inadequate core cooling condition?
QSPDS
The __________ and ___________ are required to be in the Control Room during refueling operations.
Reactor Operator
A RE Representative
How do you de-select the chosen CEAs for a RPCB and leave RPCB in service?
Press the TEST/RESET button twice
Procedure says the AAOOS button twice also
From what does the High SGWL Trip protect?
Moisture carryover to the Main Turbine
What is the cooling medium for the Containment Normal ACUs?
Normal Chill Water (WC)
Both sets of Aux Building Supplies and Exhausts are running. ‘B’ Exhaust gets a low D/P. What happens?
The ‘A’ Supply AHU will trip
N2 backup to IA comes in at ______ psig.
85 psig
What will happen on the loss of a single PN bus?
Two RTCB will open and the plant will remain at power
What cools the DG Turbocharger Intercooler?
SP
What aspects of the Spray Ponds does LCO 3.7.9 address?
Level and Temperature only
How is NKCBTFSP generated by COLSS?
COLSS correlates Turbine Power from TFSP and then calibrates that with JSCALOR to get NKCBTFSP.
What is the power supply to the CEDMCS Logic?
Non-Vital 120VAC (NNN-D11 and NNN-D12)
When is Stage Pressure Feedback used and what is it for?
It is used during Control Valve testing to maintain TLI
How do the CO pumps maintain discharge pressure?
By varying their pump stroke
You’re selected to Ppzr Instrument 100X. What happens if 100Y fails high?
Alarms - thats it
What happens to the Fuel Building Ventilation on receipt of a B FBEVAS?
The Fuel Building Normals will run dead-headed.
What will start an EW Pump?
LOP
CSAS
CREFAS
AFAS
What cools the AS Vent Condenser?
NC
What do the Second Stage Reheater Vents do on a Hi-Hi Level in #7 HPFWH?
They align to the condenser
At 1285#, how may safeties are open?
4
If Tave fails high, how will this effect RTO in the DFWCS?
This will cause DFWCS to feed at a higher rate in RTO
You lose NNN-D12. A Cutback occurs. What happens with CEAs, Setback, and Runback?
CEAs - all cutback rods drop
Setback - to 60% like normal
Runback - will not occur
What would happen if you went through OFF while cross connecting NBN-S01 and NBN-S02?
You would lose both buses
Does SBCS send a RBCP signal every time it senses a Load Rejection?
No; it has to be of a large enough magnitude to warrant a RPCB
What will auto start a RCP Lift Oil Pump?
If its RCP is secured
What will auto close the Aux Feed Room Supply dampers?
High liquid level in the pump room
What pump can fill the SITs?
B HPSI
Where does the HDP seal water come from?
The Condensate Header
How does a SIAS effect the proportional heaters?
It doesn’t
________ is sprayed into the ________ manifold of the AR Pump to condense steam at high vacuum conditions.
Coolant
inlet
When is the Main Generator Output Breaker Bypass used?
When closing the second breaker during synchronization
VCT is at 25% and CHE-536 is open. What will CHN-501 do if CHE-536 is taken to close?
CHN-501 will open
A low Tc will cause CPC compensated neutron flux power to _______ and delta T power to _______.
Rise (Signal has to get boosted more)
Rise (A larger Delta T means higher power)
Who maintains plant oversight and continuous monitoring during shift turnover?
The RO
The RWT is sized for _______ minutes of full ECCS close.
20
Where does core bypass flow go?
To the Upper Head and Upper Guide Structure
Loads in excess of ________ lbs shall be prohibited from travel over fuel assemblies in the spent fuel pool.
2000 lbs
When the main turning gear is engaged, how many lift pumps turn off and why?
2 to prevent the rotor from spinning too fast and disengaging the turning gear
What is the Main Turbine Trip on High Vibes?
12 mil
What is the status of the NN buses in Unit 2 after a LOOP + SIAS?
NNN-D11/12 will transfer to alternate power
NNN-D15/16 will de-energize
If a FBEVAS is initiated normally, what cross trips will you receive?
Both trains of FBEVAS and both trains of CREFAS
Why is a loss of IA to the Downcomer Control Valves not a huge deal?
Because they have a dedicated Nitrogen backup
Which valves receive a QOB on a LOFP Cutback?
All of them; X and Y valves
What is the RCS Safety Limit?
2750 psia
Where does the HDP suction vent?
To the HDT
What directly causes the AFA ACU to start?
The opening of the steam supply valves
What happens if CDN-UV-191 motor fails and starts to close at 100% power?
The Demin Bypass valve will start to open
You’ve got a SIAS/CIAS. What would be needed to change sequencer modes?
LOP
Pressurizer Pressure is 2310 psia. What would be the next thing to happen in the plant?
A Reactor Trip on High Pressurizer Pressure
What supplies the generator field prior to syncing onto the grid?
P Bars
What would happen to the EW System if SP were secured while on SDC?
EW temperaures would rise
Which MFP stop valve has an internal pilot valve?
The Low Pressure Stop Valve
What will trip AFN?
Load Shed
Electrical Protection
SIAS
Suction < 80% open
Power is 50%. Th fails high. What happens to letdown flow?
Letdown flow will lower to 30 gpm
When excitation is removed from the generator, the field shorting breaker _________ and the SCRs are ____________.
Closes
Fired On
On a lo-lo level in the RWT, what happens to a running BAMP?
It auto stops
What will auto start the Containment Normal ACUs?
Loss of power to the running fan.
Who can grant permission for someone to be the peer checker and the IV’er? What must also be done if this permission is granted?
- SM
- A CR has to be written
At what pressure does the RDT isolate?
10 psig
What will start the standby TC Pump?
low discharge pressure
What do the servos on the control valves do?
They control the flow of EHC fluid to and from the control valves
How many ADVs are operable if you lose PNC?
4
When at lower powers (< 20%), what is the steam supply for the Main Feed Pumps?
Main Steam
What is the purpose of the HPSI cold leg injection orifice?
It helps balance the flow between the hot and cold legs
How long does a RPCB signal last?
10 seconds. After that, rods are in control of the RRS or the operator
If the Normal Level Control Valve and the High Level Control Valve for the MSR Drain Tank both fail closed, what will happen?
The Main Turbine will trip on MSR level at -3”.
Stacking is prevented by ___________ EW flow to the EC Chiller.
Lowering
How do the Economizer Isolation valves fail on a loss of IA?
As-Is and remains capable of Fast Closing
How does the NBN-X03 transformer failing affect the NC Pumps?
it doesn’t - FBT should pick up before anything happens
Where does 12th stage extraction steam go?
to the #1 LPFWH
When EW is supplying NC Priority loads, does RU-6 monitor for radiation?
No. RU-2 or RU-3 will monitor flow
What happens to the #5 Extraction Steam Block valve on a HDT Hi-Hi?
It closes
What happens to a RMWP on a RMWT lo-lo level?
It will trip and get a blue light
To what power will the Main Turbine Setback? How fast will it get there?
60%
480%/min
If the Essential Chiller secures itself on Low Load Recycle, how long will this be in effect?
Until EC temperature rises > 45F
What is used to calibrate Safety Channel NI’s?
JSCALOR
What will secure the Containment and CEDM ACUs
SIAS
What will cause the DG to trip if in Emergency Mode?
Low LO Pressure
Generator Differential
Over Speed
What happens to the mini-flow valves on a RAS?
They go closed
What pumps does a RAS secure?
both LPSI Pumps
What alarm(s) is(are) received when a CEA subgroup is placed on the Hold Bus?
CEDMCS TRBL ALARM
From what does the High Pressurizer RPS trip protect?
The RCS in the event of a loss of condenser vacuum
What will cross trip on a FBEVAS?
CREFAS
Who can maintain the command function in the control room in modes 5 and 6?
A qualified SRO or RO
What does WHITE data on an ERFDADS Screen signify?
That the data is suspect
What supplies AF pumps if theres no water in the CST?
RMWT
How do the Downcomer Control Valves fail on a loss of IA?
As-Is
What percentage of feed flow is the High Pressure Heater Bypass rated for?
25%
How many buttons are required to be pushed to reset a SIAS from the Aux Relay Cabinet?
1 - either one for that channel
What will cause the DG to start automatically?
SIAS
CSAS (test)
LOP
AFAS (1 and 2)
What is the EW design temperature for a LOCA?
135F
When does a MSIS actuate on SGWL?
91% NR
When do we go to two Letdown Control Valves and two Letdown Back Pressure Control Valves and why?
RCS pressure < 1000 psia to ensure sufficient letdown flow due to the reduced D/P
What events will result from a loss of any two PN buses?
Reactor Trip
Full ESFAS
When do the 1st stage MSR drain tank high level dumps close on a start up? Second Stage?
10%
20%
The Regen Heat Exchanger minimizes thermal shock to ______________________.
The RCS inlet nozzles
What happens to plant efficiency and CD pump cavitation as condensate depression rises?
Plant efficiency lowers and CD Pump cavitation lowers
Brittle fracture concern is from a large tensile stress on the _________ wall of the reactor vessel.
inner
What is the purpose of the delay coil?
Allows for the decay of N-16 gammas to reduce exposure
What indication is given in the Control Room that AFA-54 is in standby?
Two red lights: one for the valve and one for the actuator
How do the BFT vents work?
4A will open to maintain set pressure in the BFT. When 4A is full open, 4B opens to relieve excess pressure to the condenser.
How is the Core Monitor filter normally operated?
Bypassed
What is the makeup source for WC?
DW
Can EW supply cool the SFP?
Yes
Actual Lpzr is 50%. Setpoint is 33%. What will happen with charging pumps and letdown flow?
Normally Running Charging Pump will stop.
Letdown flow will increase.
When the DG trips on overspeed, what happens to the butterfly valve?
It trips shut
How must AFA be reset if tripped on overspeed?
locally
What is the control valve configuration on chest warming?
2 Stop valve is open with all control valves closed
What happens to the Fuel Building Essentials on receipt of a SIAS?
The suction shifts from the Fuel Building to below 100’ of the Aux Building.
From where do the SDC isolations inside containment get their power?
125 VDC inverters
Theres a LOCA. You’ve got a bright green light on A HPSI pump. What happens if you take this switch to START?
SIAS override light comes on
Pump stays off.
Aux Building Supply/Exhaust Fans ‘A’ are running. What happens if you start the ‘B’ Aux Building Supply Fan?
The ‘A’ Supply Fan will secure.
What will close the motor operated EW cross connect valves to NC?
SIAS
Lo-Lo Level in EW Surge Tank
While on SDC, how is RCS temperature maintained?
By throttling SDCHX Bypasses
What is the position of the discharge valve for CW pumps when they are started? Why?
Closed to prevent runout
What happens if the running Containment Normal ACU loses power?
The standby unit will start after a 60 second time delay
- sensed by low D/P
How does a complete loss of the Incore Instruments affect the CMC and the PC?
COLSS will not function on either computer
What cools the BDHX?
Condensate
What happens in the DFWCS at 50% steam flow going down?
The downcomer control valve goes closed
How can a RCP cause a DNBR Trip?
If one RCP reaches 95% of rated speed the reactor will trip.
How is steam aligned to AFA on an auto start signal?
both steam supplies are aligned
Normal Supply and Exhaust dampers for the Aux Building automatically close on a _______.
SIAS.
The _______ grants permission to enter the control room and the _________ grants permission to approach the ‘at the controls’ area.
CRS
RO/CO
How do the GS valves fail on a loss of IA?
Both regulating valves fail open to preserve GS and there is no effect to the unloading valve
What is the preferred source for GS? AS or MS? Why?
AS - so you don’t lose GS on a MSIS
What effect to the Load Limit Pot and the Load Set Motor have while in Standby Mode?
None
If you were to lose UV relays 727-1/5, would the DG start?
no
The Reed Switch Position Transmitters input into the Plant Computer. Why?
To zero the the pulse counter position when a CEA drops
What will isolate RU-1?
CIAS
AC Regulator regulates _________ voltage and the DC Regulator regulates ________ voltage.
terminal
field
IAA-UV-2 auto closes on what ESFAS signal?
CSAS
Does indicated SDC flow include loop bypass flow?
yes
What is the supply for 1st and 2nd stage reheat steam in the MSRs?
first: 3rd stage extraction steam
second: Main Steam
HV-11 is fully open with all four CW pumps running. If CW Pump C is taken to STOP, what will happen?
C Discharge valve will close and at 8% the pump will trip and the valve will then close fully. All other valves stay as is
What uses the COLSS inputs?
PC and CMC
SFP Cooling takes a suction on the _____ of the SFP and discharges to the _____ of the SFP to aid in _______________.
Top
Bottom
Natural Circulation
What cools the generator collector housing?
WC
When the EC System is started up, what is the first component to start?
The Essential Chilled Water Pump
Taking the SBCS Master Controller to MAN controls the controller ___________ and defeats the _____________ and ________________
output
Quick Open
Auto Modulate
What will cause the hotwell draw off valve to close?
Low Feed Pump pressure
High conductivity
What happens to the MSIVs on a complete loss of electrical power?
They Fast Close
What is the sequence for starting the main turning gear?
- piggyback motor
- engagement
- big motor
When in purge mode, where are the MSR tube bundles aligned?
To the Main Condenser
What happens on a loss of IA to the Charging Pump Room
The TCV will fail to max cooling
If the Main Feed Pump trips on low suction pressure, what valve will auto close?
The Hotwell Drawoff Valve
After 90 minutes of full ECCS flow after a LOCA, from where will the CS pump be taking a suction?
The RAS Sump
How do CHA-UV-505 and CHB-UV-506 fail?
Closed on a loss of air and power
What will start the ESF Switchgear Room Essential AHUs?
SIAS
LOP
What happens if you lose PK while the DG is running?
The DG will trip and the output breaker will stay closed causing the DG to motorize
The CPC Operational Bypass will automatically come out of Bypass when power reaches ______%.
10 (-4)%
Following an inadvertent CSAS with a SIAS, what must the operator do to start a CS pump?
Go to START twice
What happens if a short occurs on an NC pump when the bus has no control power?
The feeder breaker for the NB bus will open
How would PNA in Unit 1 be restored on a loss of PKA?
By manual shift to its voltage regulator
What are the interlocks that must be met before a CW Pump can be started?
Its discharge must be closed
Its waterbox outlet valve must be open
What happens to the PC pumps on a LOOP?
They will both lose power. However, they can be manually restarted once the DGs are on the bus.
CEAC penalty factor _________ over a _____ hour period due to xenon redistribution.
increases
6 hour
What is the purpose of the MSIV Bypass Valves?
To warm up downstream piping and to equalize pressure around the MSIVs
What other system uses the SBCS Master Controller?
DFWCS;
for use in 1E anticipitory control
What would happen if during a LOFP RPCB a LLR RPCB was manually initiated?
This would result in the SBCS Valves Quick Opening
If you lose GS, what must be done with the secondary plant?
Trip the Turbine and break vacuum
Loads in excess of _______ lbs shall be prohibited from travel over fuel assemblies in the storage pool.
2000 lbs
How is the position of the Pressurizer Safeties determined?
Acoustic Monitors
Hot Gas Bypass prevents _____________.
Surging
How long can the DG run without SP flow?
2.6 minutes loaded
15 minutes unloaded
What is the max temperature allowed for SDC?
350F
What happens to speed and voltage control of the DG if it is taken to override?
Speed and Voltage control are restored to the Control Room
How does CEDMCS determine that the UGS has been reached?
Once a certain number of pulse counts is attained
What happens to the CVCS system on a loss of PK?
The Auxiliary Spray valves fail closed
What is control power to the RTSG?
PK
There’s a Reactor Trip with a MSIS. No operator actions. What is the plant doing?
AF feeding both SGs and SG safeties controlling SG Pressure at 1250 psig.
What information from QSPDS is sent to B02?
The more limiting of either RCS or Upper Vessel Head Saturation Margin
The TEST/RESET button is backlit on the RPCB control panel. A RPCB occurs. What happens?
Signals will be sent but no rods will drop
What must be done to regain heater control if RCN-LT-110Y fails low?
The heater selector switch must be taken to the X channel
AFA requires _______ rpm for adequate lubrication.
1000
How do the valves fail for the AR post filter blower on a loss of IA?
Through the filter
What protects the Remote Shutdown Panel from fire?
Halon
What will trip the Control Room Normal AHU?
LOP
SIAS
CREFAS
CRVIAS
Reactor Power is ramping up at 15% per minute. How long before you get a VOPT?
2 minutes
What is the design basis for CPC’s?
To prevent exceeding Specified Acceptable Fuel Design Limits (SAFDLs)
What effect does a loss of IA have on the GS unloading valve?
none
A higher generator frequency results in a _________ load when synching onto the grid.
higher
B CD pump is running with one suction valve open. If this valve is taken off its open seat, will anything happen?
Yes, the pump will trip
What is reflux boiling?
A flow path from the hot leg to the SG and back down the hot leg.
A CPIAS will close the __________ __________ Isolation Valves.
Refueling Purge
What closes the Hydrogen Analyzer supply valves? Can they be overridden?
CIAS
Yes
What signals will close the Power Access Purge Containment Isolation valves?
CIAS
CPIAS
During a Refueling Purge, a __________ pressure is maintained due to the exhaust fans having a _________ capacity than the supply fans.
negative
higher
Where does the LRS Evaporator Steam Condensate Pump send its discharge?
The AS Receiver Tank
What flow rate is required to keep hydrogen below the combustion limit during a waste gas release?
25000 scfm
How long before a Radwaste alarm rings in the Control Room?
5 minutes
What is the purpose in the GR Surge Tank?
Absorbs fluctuations in gas volume to minimize compressor run time.
If RU-7 alarms, to where does the AS Receiver Tank discharge get sent?
Low TDS Holdup Tank
