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
