Sparky Sparky
Makes The Roundy Roundy
Makes The Roundy Roundy
The DC Buses that, when de-energized, will DIRECTLY cause reactor trips.
D-01 (Via D-11, D-12) and D-02 (Via D-27 and D-13)
This (C)HUT is aligned to Unit 2 and receives inputs from what primary source? When does this source align?
The 'A' CVCS Holdup Tank is aligned to Unit 2 and primarily receives water from diverted letdown flow via 2CV-112A. This valve goes to diver when positioned as such AND when VCT level gets sufficiently high (LT-112A 78%, LT-141 56%).
The setpoint of the low suction pressure trip of the condensate pump
The Limit Does Not Exist
When preparing to use In-Core instrumentation, the path for one of the detectors is set to "EMERGENCY" prior to use. What does this function do, and how is this controlled?
When in emergency, the 5-path will direct the detector to the next 10-path (A->B, D->A, Etc.) and the detector will be sent to the core location selected on the next 10-path device. Protective functions (withdrawal limit and safety limit switches are disabled).
LCO 3.8.1 will be not met when Outside air temperature is 97.5 degF as G-01 and G-02 will be inoperable.
At 98 degF outside, both trains of standby emergency power are inoperable and shutdown will be required if not restored in < 2 hours
This is the flow path of energy produced and aligned for excitation of the Main Turbine Generator.
PMG (Produces AC) -> Field Circuit Breaker -> (Rectified to DC) Power Amplifier -> Exciter Field (Produces AC) -> Exciter Windings -> (Rectified to DC) Generator Windings
Unit 1 has experienced a LOCA and SI automatically actuated on Low Pressurizer Pressure. After stabilizing the event, the operator wants to continue blending Boric Acid at a lowered concentration into the RCS via CVCS to add to the sump level without lowering sump pH.
If SI has not been reset, can this be done? If so, what pump(s) can be used, and are any alignment changes needed?
P-23B (2B-31) Reactor Makeup Water Pump is available and 1P-4A (B-33) Boric Acid Transfer Pump is available for flowing water.
One would have to ensure that P-23B is aligned for the blender and not the services header.
The Start Permissives for a Steam Generator Feed Pump
(D) Discharge Valve Shut
(R) mini-Recirc Valve Open
(O) lube Oil Pressure >10 psig
(P) suction Pressure > 184 psig
(S) Seal water/pump suction >30 psid
No Protective Relays
This permissive unblocks my "At Power" Trips at this setpoint. What trips are my "At Power" Trips?
P-7: >10% Power FSP via PT-485 or 486 OR P-10 Met (>10% Power on NIs 2/4).
At Power Trips consist of Low Pressurizer Pressure, High Pressurizer Level, Two Loop Loss of Coolant Flow, Reactor Trip from Turbine Trip, Undervoltage A01/A02
PPCS alarms indicating N-42 quadrant power at 1.05. If the unit is operating at 92% power, what must power be reduced to?
85%.
The crew is performing TS-82 to test G-02 as it is returned to service from maintenance. When taking initial logs, the AO notices both air banks are depressurized. The Control Switch is in the ON position. These MCCs would need checked to ensure power is aligned to K-4B and K-5B Starting Air Compressor.
2B-42 (K-4B) and 2B-32 (K-5B)
This valve can be throttled to adjust Component Cooling Water system flow. What valve is this and what is the continuous operation flow rate for 1 CCW Pump.
CC-753 Bypass Loop Outlet Throttle is used to adjust flow between 1000 gpm and 3550 gpm.
The Purpose of CS-2252 Condensate Pump Mini-Recirc Valve and its operating setpoints and interlocks.
CS-2252 maintains flow across the Gland Seal Condenser and the Inter/After coolers for the Air Ejection System.
This valve opens at <3 psid from pump discharge to outlet of the air ejector condensers and shuts when >8.5 psid.
This valve is interlocked to go SHUT when CS-2273 Low Pressure Feedwater Heater Bypass Valve is opened.
The Intermediate Range Instruments were calibrated prior to reactor startup at BOL, the reactor is preparing for power coast down. After shutdown is complete, it is noted that source range instruments did not re-energize automatically. What mistake during calibration would cause this to occur?
If the IR instruments were Undercompensated during calibration, they would be reading artificially high following shutdown, preventing the re-energization of the SR detectors by not meeting the P-6 setpoint.
RCS Temperature is 400 degrees during warmup to normal operating temperature. What is TS limit for shutdown margin at this time? Are there any hour or less actions if this is out of spec?
Mode 3- Limit is 2.0% SDM, if out of spec, borate to restore within 15 minutes.
The modes of control for the Main Generator Voltage Regulator and how they are controlled and major protective features from the Voltage Regulator.
(Don't worry about other Generator Trips)
Automatic (AC Control):
-Limiters (Min Excitation, Max Excitation, Volts/Hertz)
-Loss of Excitation, Loss of Sensing, Loss of Field, Field Breaker Open (Auto to Manual)
Manual (DC Control):
Common:
-Overexcitation Protection (T/D, 10 sec to man, 3 from man to trip)
-Volts/Hertz Protection
The RWST levels at which HHSI, LHSI, and CS should or must be secured.
LHSI and HHSI should be transitioned to Sump B recirc by 17% (Low-Low Level Alarm), this should be initiated by 34% (Low Level Alarm)
CS (Full Flow) 17%, CS (Orifice Flow) 10%
Bus 1B-41 has been lost due to an unknown fault during turbine startup with turbine speed ~1200 rpm. What is maintaining seal oil pressure? What pressure is being maintained in the Seal Oil Header? What pump(s) in the lube oil and seal oil systems are operating?
Seal oil pressure (Air and Hydrogen Side) is being maintained by P-59B. This is maintaining 12 psid in the air side header and is providing makeup to the hydrogen side header.
P-37D DC Emergency LO pump and P-59B are the only pumps running.
Unit 2 has had a series of electrical faults due to grid perturbation causing trips of both main feed pumps and has lost B Train Safeguards power with a 2A-06 Lockout due to a fault when the diesel loaded onto the bus. The reactor has a valid low steam generator water level trip signal but has not tripped. Turbine pressure is reading 63% and lowering.
What is the status of AMSAC, at what time do actions take place?
AMSAC cannot actuate due to loss of 2Y-06.
Chemistry has tested the spray add tank concentration following makeup addition to the tank. Tank level is 51% and concentration is 36% hydroxide by weight.
What LCOs, if any, are not met, and why?
LCO 3.6.7 Spray Add System is Not Met due to concentration high. Must restore to operable within one hour.
Somehow, Circuit Switcher 112 has failed open. What is the effect on the electrical system. What major components, if any, are de-energized/stopped?
No Fast Bus Transfer, 1X-04 de-energized, EDGs start, G-01 and G-03 load (supplying 1A-05/06)
Charging pumps can be restarted but were de-energized
Letdown Isolated
The temperatures that the SFP is designed to maintain with how many trains in operation and under what conditions?
SFP Temp < 145degF with 1 train in operation following complete core offload.
A seismic event leads to a LOCA on Unit 1, causing an SI. The event also causes the hydrogen header in the PAB to rupture, starting a fire.
What is the response of the fire water system after the sprinklers begin actuating? At what point do these actions take place?
P-35A Electric Driven Fire Pump- Start signal received at 95 pounds, does not start due to stripping
P-35B Diesel Driven Fire Pump- Start signal received at 80 pounds, starts when required.
Low Header Pressure Header Alarm at 90 pounds.
P-36 Jockey Pump- Starts with low tank pressure and level, continues to run as accumulator will not repressurize/fill.
The operator at the controls takes the block valve to shut. What is the status of the LTOP enabled light and PCV-431C?
LTOP Enabled light for PCV-431C is OFF and PCV-431C is OPEN
The control room is performing its approach to criticality to prepare for reactor physics testing when N-31 fails. What LCOs are not met, what actions are required (and time requirements). What, if any, additional instrumentation that is required may be affected by this failure?
LCO 3.3.1 RPS Instrumentation is not met for function 4(a). Per condition H, operations involving positive reactivity additions are to be suspended immediately.
No additional considerations should need made for this failure.