AOP Basics Flashcards
There is steam biding in the AFW system. The procedure has you check Rx Power less than 97%. Why?
Because cold AFW will raise power
If there is a dropped or misaligned rod, what must Tave-Tref deviation be maintained at?
+/- 3 degreed
East charging pump is in run and the west pump is in neutral. What must be done if the east pump trips off in order to restore pressurizer level control back to normal?
Manually start the west CCP, take charging to minimum, and restore letdown.
What must be done if bus duct cooling is INOPERABLE?
Immediately reduce bus loading to 10,000 amps/phase (~40% turbine load)
How does the turbine trip controller work for steam dumps?
Trips 1 group open at a 10 degree difference and a second group open at a 20 degree delta.
What is affected if one rod falls into the core?
Radial Power Distribution
NOT SDM
During a PR Failure, Tech specs give you 1 hour to
Verify P-7, P-8 and P-10 status
During continuous rod motion, what is the preferred recovery of low RCS temperature to restore equilibrium conditions?
Reduce turbine load
What must be done if a SG Tube leak exceeds 50 gpm?
Trip the Reactor and go to EO
During a loss of CCW, you check CCP status in attempt to save 1 CCP for operations upon CCW Restoration. What do you do in Modes 5-6?
Stop both CCPs
What are the immediate actions of a tripped HDP?
NONE! Check to ensure proper plant response
VCT Level instrument QLC-451 is responsible for _____. Are there any alarms?
Makeup at 14 % to 24%
Divert trips open at 87%
Alarms for High and low level, as well as MU not in auto
Per TS, if a leaky PRZ PORV is not capable of being manually cycled, you have….
1 hour to close block valve and 1 hr to remove power
What are the RO stable parameter Reports?
- Reactor Power- LEFM, NI or DT
- RCS Temp
- RCS Pressure
- PRZ Level
- Delta I
- Controllers in Manual
What issues can the BOP use IFR-001 for?
SG Pressure / Level Control
MFP DP
FW Htr Level
LO Temp
At 99% power and with rods in auto, continuous rod motion begins. Rods are inserted below the low-low RIL. What must be done?
emergency boration
If there is a turbine lagging fire, what must be done?
Send AEO to verify with local observation
If frequency is < 59 Hz but >58.2 Hz Then….
Trip Reactor in 30 mins per E-0
What is the cutoff for containment inspection for a RCS Leak?
> 1 gpm
What must be done if ALL aux building Exhaust fans (both units) fail?
Request RP to verify all AB doors that lead to uncontrolled areas closed AND verify that AB pressure is negative within 30 mins
When recovering a single dropped rod, Why must power be stable? And for how long?
Because of xenon. It should be stable for 48 hrs
If you lose CRID 1 or 4, will the red handle switches work for a manually SI Actuation for that train?
NO!
Each pump must be started manually
Per LTOP TS, if there are 2 CCPs capable of injections, you must….
Immediately restore to max of 1 CCP
What are possible indications of CCW Inleakage?
- Rising Surge Tank Level
- Rad Monitor Alarm
- Rising tritium concentration
When is RHR operation not permitted?
Less than 614’
What are the Plant and
control air key pressures and ACTIONS?
95 psig - Sby PAC Starts
90 psig - CAC Starts
85 psig - PA Ring Hdr Isolates
80 psig - Manual Trip Required
Entry conditions for E-0
M 1-3 with SI
M 1-2 with Rx Trip
When implementing the High Reactor Coolant Activity our Failed Fuel AOP, what should be done with CVCS and why?
Charging and LD should be maximized thru the LD Demins to maximize clean up.
During a loss of CCW, you check CCP status in attempt to save 1 CCP for operations upon CCW Restoration. What do you do with 1 CCP available?
Place C/S in lockout- SAVE ONLY PUMP
When temperature is dropping rapidly during a secondary transient, what should you do with rods?
Do NOT withdraw them manually bc it would be a second positive reactivity addition
If screen DP is > 50” or trashrack DP is > 24 “, what do you do?
Trip both units and enter E-0
Close Stop valves and trip ALL CW pumps and verify disch valves closed.
What are potential sources of CCW out-leakage?
RCP Seal Return Hx
Containment pressure channel 2/3/4 are indicating normal and channel 1 is failed high. Actions per AOP complete. MTI requests permission to test containment channel 3. What is the appropriate response to the request?
Surveillance should be allowed since it takes a minimum of 2 additional protection channels to actuate an SI or Containment spray.
What condition must exist before starting a RCP?
DP across No 1 seal must be greater than 215 psig
What are the Control Room Operator actions necessary during an irradiated fuel handling accident in the spent fuel storage area?
Sound NEA
If vent stack rad monitor levels are rising, secure both trains of SFP supply fans from service.
While making preparations to locate and isolate the thimble tube leak, detector “C” fails to move into the storage position. Which one of the following locations should be used for a safe parking position?
Directly under the reactor core
How does the CCP ELO work with a standing SI signal?
2 sec delay, then operates to maintain 1812-1825#s
If a Tcold instrument fails high, what are the effects?
OP delta T and OT delta T lowers
Delta T gets smaller
Tavg gets larger
With 120 gpm letdown in service and blender controls in automatic, QLC-452 fails to 100%. With no operator action, actual VCT level will:
Lower to zero and eventually result in loss of CCP suction.
During a loss of CCW, the operator verifies all 4 CRDM Fans are running. Why?
Cools Rx Head during natural circulation cooldown
What must be done if a RCS leak exceeds the capacity of 2 CCPs?
Trip the Reactor and Enter E-0
During a RCS leak, what should be done if containment pressure approaches 1 psig?
trip the Rx and Enter E-0
What are the BOP E-0 Immediate actions?
Turbine Trip
a. All turbine stop valves closed status lights – LIT
Power to AC Emergency Buses
a. AC Emergency buses – at least 1 energized. T11A or T11D
b. AC Emergency buses – all energized. T11A, T11B, T11C, T11D
SI Status
a. SG pressures
What is the expected plant response to a loss of control air?
PRZ Spray valves fail closed (backup air used)
Blender and LD Isolate
SG PORV (nitrogen backup)
Ctmt cooling lost
CCW Flow lost
What is the system response to a high rad on R-5 for SFP Area?
- Places FHA exhaust fan in charcoal mode (if not already there)
- Trips SFP Supply Fans
Which one of the following effects will result from an Intermediate Range compensated ion chamber detector that is UNDER COMPENSTED?
P-6 status light energizes much sooner than normal during a reactor startup
How do you identify leaking thimble tubes?
measure thimble tube temps 6” above tube isolation valves (greater than ambient)
After a spurious Phase A Isolation, what should happen after it is reset?
CUVs should autostart
What is the RCP Trip Criteria for the foldout page?
- Complete Loss of RCP Seal Cooling
- # 1 Seal Leakoff Temp - 185*F and loss of seal injection
- # 1 Seal Leakoff Temp - 200*F
- RCP Lower Bearing Water Temp - 225*F
- RCP Upper Motor Bearing Temp - 200*F
- RCP Vibes - 20 mils
- # 1 Seal Leakoff > 6 gpm
- # 1 Seal Leakoff < 1 gpm and temp rising
AES fan 1 charcoal filter fire or abnormal is lit, Operator has confirmed a fire exists. Which actions should be taken
Manually open deluge isolation valve, Verify deluge valve opens, Start 2-HV-AES-2
What is needed for AMSAC actuation?
3/4 Feed Flows < 25%
What happens if CRID 1 is lost?
Train A SSPS slave relays lose power
All 4 FRVs close on FWI
Rx Trip
What happens if PRZ Level bistable channel fails high?
NOTHING other than an alarm
If there is a PR failure high, what will rods do?
Rods step in due to mismatch. Rods will NOT withdraw due to temp deviation after the power mismatch decays bc of PR Rod Stop C2
How low must the CCW Surge tank be lowered to figure out which header the leak is on?
baffle height ~ 48”
At what pressure does CRV-224 begin modulating open? Trips?
240# CRV-224 begins to modulate
210# CRV-224 trips open
What must be done if rods are inserted below the low low rod insertion limit?
Emergency Borate
Following the resetting of a SI and Phase A, the control air containment isolation valves failed to open. Which one of the following describes the current status of the plant?
RCS charging is available but letdown can not be restored
What are the indications of an uncontrolled dilution?
Rise in power and temperature
Rod insertion
Audio count rate
What must be done if there is a fire in the AES Fan?
STOP AES Fan, as it does not auto trip
What are potential sources of CCW in-leakage?
LD Hx RCP Thermal Barrier Hx XS LD Hx SFP Hx NBAE WGC Fill Valve RHR Opp Unit
A load rejection at ______ presents the greatest short term plant operational challenge due to the ______ MTC reactivity feedback allowing a larger rise in Tave.
BOL
Lower
Grid frequency must be maintained …..
greater than or equal to 59 Hz
What are the operator actions for loss of SFP Cooling?
Stop SFP and skimmer Pumps if SFP level < 23’8”
Stop SF Movement
If below P-8 and there is a total loss of NESW, what must be done?
Trip MT and MFPs
Break Condenser Vacuum
Stop MT LO Pumps