Week 7 Flashcards
• A major event has occurred causing an automatic reactor trip.
• Containment pressure is 8.7 psig and increasing slowly.
• Class 4160 bus power has been restored from a Unit 2 Diesel Generator.
• The TSC Emergency Coordinator directs the Control Room to NOT initiate CSAS.
To follow the Emergency Coordinator’s directions, the SM/CRS must…
A. enter Tech Spec 3.0.3.
B. declare 10CFR50.54x
C. declare both containment spray train inoperable per LCO 3.6.6.
D. enter LCO 3.6.4 for “Containment pressure” and complete the actions.
B. declare 10CFR50.54x
With Unit 1 at 100%, and given the following information from Tech Specs:
• Action statement for 3.7.5 (Condition A) states, …with one steam supply to turbine driven AFW pump inoperable, restore the steam supply to OPERABLE status within 7 days AND 10 days from the discovery of the failure to meet the LCO.
• Action statement for 3.7.5 (Condition B) states, …with one train of AFW inoperable for reasons other than Condition A, restore the AFW train to OPERABLE status within 72 hours AND 10 days from the discovery of the failure to meet the LCO.
Given the following conditions:
11/10 @1300: AFA-P01 becomes inoperable because the wrong oil was added.
11/12 @1300: Steam supply SGA-UV-138 becomes inoperable.
11/12 @1400: AFA-P01 oil change-out is complete.
11/16 @1300: AFB-P01 becomes inoperable.
11/16 @1500: AFB-P01 becomes OPERABLE.
Assuming that extensions are applied (if applicable), which of the following identifies the time and
date for restoration of SGB-UV-138 before further action is required.
A. 1300 on 11/17
B. 1300 on 11/19
C. 1300 on 11/20
D. 1300 on 11/23
B. 1300 on 11/19
What is the most limiting accident, including time in core life and power level, for Shutdown Margin (SDM) requirements?
Main Steam Line Break at Hot Zero Power, End of Core life
• Unit 1 is operating in Mode 1.
• One Pressurizer Safety valve becomes inoperable.
• All other safety valves are operable.
What actions (if any) are required per Technical Specifications 3.4.10 Pressurizer Safety Valves -
MODES 1, 2, and 3?
A. No actions since the LCO is MET.
B. Restore the safety valve to OPERABLE status in 15 minutes.
C. Restore the safety valve to OPERABLE status in 30 minutes.
D. Restore the safety valve to OPERABLE status in 1 hour.
B. Restore the safety valve to OPERABLE status in 15 minutes.
• The plant is in MODE 5.
• Preparations are in progress to heatup/startup the plant.
• Containment average air temperature is 121F.
• A risk assessment has NOT been performed.
Can a RCS heatup proceed to above 210F? Why or why not?
A. No. The TS ACTIONS do NOT allow unlimited operation when containment average air temperature is >117F.
B. No. The applicable LCO is NOT met when the highest containment air temperature indicator is >117F.
C. Yes. The applicable LCO is met provided containment average air temperature is < 117F within 8 hours after entering MODE 4.
D. Yes. The LCO is considered MET until the MODE of APPLICABILITY is entered, then the containment air temperature would have to be lowered to < 117F.
A. No. The TS ACTIONS do NOT allow unlimited operation when containment average air temperature is >117F.
If the Train essential cooling water pump becomes INOPERABLE, what other Train equipment
becomes INOPERABLE?
A. Essential chilled water and ECCS Train.
B. Diesel generator and spray pond pump.
C. Spray pond pump and essential chilled water.
D. ECCS Train pump and diesel generator.
A. Essential chilled water and ECCS Train.
• The plant is at 100% power.
• The Crew is presently in 3.8.1 condition A due to a loss of an off-site circuit.
• All actions in 3.8.1 condition A. have been completed.
• 4 Hours later the AO reports the associated circuit Emergency Diesel Generator (EDG) lube oil indicates 0.5 inches in the site-glass.
Based on these conditions, the crew should declare the EDG inoperable…
A. 48 hours after time of discovery.
B. and enter the required actions 3.8.2.
C. and enter the required actions of 3.8.1 condition b and d.
D. and enter the required actions of 3.8.1 condition d and 3.8.2 actions a and b.
C. and enter the required actions of 3.8.1 condition b and d.
• Unit 1 at 90% power, normal alignment.
The following occurs:
• At 0700, Class Instrument Inverter PKA-N11 is DE-energized and isolated.
• Class Instrument Bus PNA-D25 is ENERGIZED from its Constant Voltage Transformer to allow maintenance on Inverter PKA-N11.
• Current time is 0900.
A. With the above conditions, is the Class Instrument Bus PNA-D25 considered OPERABLE? Why? (Justify your answer and include reference as applicable)
B. GIVEN the current time, what TS LCO/TRM TLCO(s) CONDITION(s) is/are required to be entered given the status of Unit 1?
A. Yes
(Per Bases B.3.8.9-3 for Section B.3.8.9) “OPERABLE AC vital instrument bus electrical power distribution subsystems require the associated buses to be energized to their proper voltage from the associated inverter via inverted DC voltage, or Class 1E constant
voltage regulator.”
B. LCO 3.8.7
Condition A (Action A.1 7 days)
(Subtract .125 if Condition B is listed)
• Unit 1 has been at rated power for 6 months.
• An RCS leak is identified and AOP 40AO-9ZZ02, Excessive RCS Leakrate is entered.
• All available Charging Pumps are running, and Pressurizer Level continues to lower.
• The crew isolates Letdown.
• Pressurizer Level is slowly rising.
• There are no indications of any Containment radiation monitors in alarm or trending to alarm.
• Auxiliary Building radiation monitor RU-9 is in alarm.
Based on these indications the crew has determined that the leak occurred on the Letdown Line
outside of Containment. What type of leak (if any) occurred?
A. Tech. Spec. Identified Leakage
B. Tech. Spec. Unidentified Leakage
C. Tech. Spec. Pressure Boundary Leakage
D. A Tech. Spec. defined leak did not occur
D. A Tech. Spec. defined leak did not occur
• Unit 2 is at 100% power
• Three main steam safety valves on each steam generator (a total of six MSSVs) are declared
inoperable.
What action is required by Tech Specs?
A. Be in mode 3 within 6 hours
B. Reduce power to < 68% within 4 hours
C. Reduce power to < 76.4% within 4 hours
D. Enter LCO 3.0.3 and be in mode 3 in 7 hours
B. Reduce power to < 68% within 4 hours
