Pre-Test Review (No RQ-C-KNOW) Flashcards
What are the safety related functions of the Reactor Protection System
- Keep fuel within DNBR
- Limit RCS Pressure w/in design
What are the non-safety related functions of the Reactor Protection System
- Initiate Turbine trip from a Reactor Trip
- Status and Alarm Conditions
What is the function of OTDT & what are the inputs
- Protects from DNB
- Inputs from dT, Tave, AFD, and Pressurizer Pressure
What is the function of OPDT & what are the inputs
- Protects from kW/ft
- Inputs from dT and Tave
What are the Safety Limits
- WRB-1 DNBR >= 1.17
- W-3 BNDR >= 1.30
- Centerline Fuel Temperature < 5080 deg F (decreasing by 58 deg F per 10K MWD/MTU)
- RCS Pressure < 2735 psig
Loss of 4kV Bus Voltage MDAFP start signal:
- Setpoint
- Coincidence
- Interlock
- 94 (93) V
- 2/3 on EITHER T11A/T11D bus
- None
Loss of 4kV Bus Voltage MDAFP Valve repositioning signal:
- Setpoint
- Coincidence
- Interlock
- 94 (93) V
- 2/3 on BOTH T busses in the same train
- None
AMSAC MDAFP start signal:
- Setpoint
- Coincidence
- Interlock
- Feedwater Flow <25%
- 3/4 flow channels
- C20
Low Low Steam Generator Water Level MDAFP start signal:
- Setpoint
- Coincidence
- Interlock
- 5 (22) % Level
- 2/3 level channels on 1 Steam Generator
- None
Loss of Both Main Feedpumps MDAFP start signal:
- Setpoint
- Coincidence
- Interlock
- Feedpump Turbine Stop Valves Closed
- 2/2 limit switches madeup (1 from each MFP)
- Only Available w/ switch in AUTO
RCP Bus Undervoltage TDAFP start signal:
- Setpoint
- Coincidence
- Interlock
- 88 V
- 1/2 on 2 RCP busses
- On time delay
SG Water Level Low Low TDAFP start signal:
- Setpoint
- Coincidence
- Interlock
- 5 (22) % Level
- 2/3 level channels on 2 Steam Generators)
- None
AMSAC TDAFP start signal:
- Setpoint
- Coincidence
- Interlock
- Feedwater Flow <25%
- 3/4 flow channels
- C20
Loss of Voltage Load Shed signal:
- Setpoint
- Coincidence
- Interlock
- 94 (93) V
- 2/3 on ANY T bus
- 2 sec Delay
Degraded Bus Voltage signal:
- Setpoint
- Coincidence
- Interlock
- 113 V
- 2/3 on EITHER T11A/T11D
- 2 min Delay
RWST Sequence signal:
- Setpoint
- Coincidence
- Interlock
- VCT Level < 2.5%
- 2/2 Level Channels (QLC-451/2)
- Either IMO-910/911 full open before QMO-451/452 closes
Which Pressurizer Pressure Channels are used for SI
- Channels 1-3
Which Containment Pressure Channels are used for SI
- Channels 2-4
Which Containment Pressure Channels are used for CTS
- Channels 1-4
What is the input into Pressurizer Level Program Control
- Auctioneered high Tave
How many gallons per % Level in the Pressurizer
- 75 gallons per % level
What happens at 17% Pressurizer Level and lowering
- All heaters are de-energized AND Letdown Orifice valves close to protect heaters
Why is NLI-151 (Pressurizer Level Cold Cal) used during cooldown
- Because actual level is lower than indicated on the hot cal channels and doesn’t provide heater protection
What instrument inputs to LTOP Protection for NRV-152
- NPS-122 (Loop 1 WR)
- Even, Even, Odd
What instrument inputs to LTOP Protection for NRV-153
- NPS-121 (Loop 2 WR)
- Odd, Odd, Even
What is the normal PRT:
- Temperature
- Level
- Pressure
- 100 deg F
- 83 % level
- 3 psig
Why are all backup heaters energized before a large dilution
- To promote boron equalization between the RCS and the Pressurizer
What are the dT limits for Aux Spray
- 320 deg F (TRM)
- 302 deg F (QTI-451)
- 290 deg F (QTI-60)
During cold shutdown why must PRT level remains less than 5% level
- To ensure sparger line are uncovered to aid in RCS draining
What is the minimum demand/flow achievable with QRV-251 in AUTO and what does this ensure
- QRV-251 stops at 23.5% demand/47 gpm in AUTO
- Prevents isolating seal injection
What action is required with regards to the BAT during emergency boration
- Must be manually shifted to FAST speed
What do the CCP ELO valves (QMO-225/226) do on an SI
- Close on SI
- w/ standing SI, 2 sec delay then cycle to maintain RCS pressure 1812-1825 psig (controlled by NPP-151/153)
- Continue to cycle until SI reset AND valves taken to Pull-to-Reset
If shutdown margin IS NOT within COLR limits what action must be taken
- Borate to restore within 15 minutes
Why is Charging flow kept slightly higher than Letdown flow during normal at power operations
- To account for seal leakoff flow
Generally speaking, what functions are associated with QLC-451
- VCT Makeup Functions
Generally speaking, what functions are associated with QLC-452
- VCT Divert Functions
What happens at 87% VCT level on QLC-451/452
- Trip open divert AND alarm (QLC-451)
- Divert full open (QLC-452)
What happens at 78% VCT level on QLC-451/452
- Nothing (QLC-451)
- Divert starts opening (QLC-452)
What happens at 24% VCT level on QLC-451/452
- Makeup secured (QLC-451)
- Nothing (QLC-452)
What happens at 14% VCT level on QLC-451/452
- Auto makeup starts AND low level alarm (QLC-451)
- Nothing (QLC-452)
What happens at 7% VCT level on QLC-451/452
- Nothing (QLC-451)
- Low level alarm (QLC-452)
What happens at 2.5% VCT level on QLC-451/452
- VCT Low Low Level Alarm (QLC-451/452)
- RWST Sequence on 2/2
What flow path does QRV-303 Letdown Divert Valve fail to
- Fails to VCT
What are the inputs to the Steam Dump controller in Tave Mode while on the “Load Rejection Controller”
- Auctioneered Tave-Tref
What are the inputs to the Steam Dump controller in Tave mode while on the “Turbine Trip Controller”
- Auctioneered Tave-547
How many groups of Steam Dump Valves are available while on the “Load Rejection Controller” AND at what temperature delta do they begin to open
- Group 1 (5 deg delta)
- Group 2 (9 deg delta)
- Group 3 (13 deg delta)
How many groups of Steam Dump Valves are available while on the “Turbine Trip Controller” AND at what temperature delta do they begin to open
- Group 1 (0 deg delta)
- Group 2 (10 deg delta)
What temperature is T no load
- 547 deg F
How many groups of Steam Dump Valves are available below “Low-Low Tave” when the controller has been taken to “Bypass Interlock”
- One Group available below 541 deg F
What pressure is being controlled with the Steam Dump Controller in “Steam Pressure Mode”
- Bypass Header UPC-101
What are the ECCS Design Acceptance Criteria
- Peak clad temperature ,2200 deg F
- Max clad oxidation <17%
- H2 generation <1%
At what pressure does the CCP start to inject during an accident
- 2300 psig
At what pressure does the SI start to inject during an accident
- 1600 psig
At what pressure do the accumulators start to inject during an accident
- 600 psig
At what pressure does the RHR start to inject during an accident
- 200 psig
At what flow rate does the CCP inject during an accident
- 150-550 gpm
At what flow rate does the SI inject during an accident
- 400-600 gpm
At what flow rate does the RHR inject during an accident
- 4500 gpm
What is acceptable volume range for the Accumulators
- 921-971 cuft
What is acceptable pressure range for the Accumulators
- 585-658 psig
What is acceptable boron concentration range for the Accumulators
- 2400-2600 ppm
What interlocks must be met in order to start an RCP
- Bearing Lift Pump Motor Start Closed
- Bearing Lift Oil Pressure > 510 psig
What is the flow rate up through the #1 RCP seal
- 3 gpm
What is the flow rate up through the #2 RCP seal
- 3 gph
What is the flow rate up through the #3 RCP seal
- 100 cc/hr
Where does #1 RCP seal return go
- Seal Water Hx to the CCP suction/VCT
Where does #2 RCP seal flow go
- RCP standpipe/RCDT
Where does #3 RCP seal flow go
- RCDT
With regards to the RCPs, what must be done on a loss of CCW or a Phase B Containment Isolation AND what is the timeframe for this action AND why is this action taken
- Trip the RCPs
- Within 2 minutes
- Prevent damaging bearings
If at power what must be done if an RCP trips
- Trip the reactor
What do the Incore NIs do
- Determine magnitude/location of fuel burnup
- Identify misaligned rods
- Perform flux profiles/QPTR
What type of detectors are the Source Range NIs
- BF3 Proportional
What type of detectors are the Intermediate Range NIs
- Compensated Ion Chamber
What would your Intermediate Range NIs read if they are over compensated
- IR would give a false LOW indication