Week 5 Flashcards
The Train ‘B’ Essential Chiller is declared inoperable and the crew begins to perform the required
actions of 3.7.10, Condition A. Assuming LCO 3.0.6 is implemented, how should the Operating
Crew treat AFW?
Train ‘B’ AFW is considered…
A. inoperable and the required actions of 3.7.5 must be entered.
B. operable since EC provides minimal support for this safety function.
C. operable as long as the required actions for EC are being implemented.
D. inoperable, however the conditions and required actions associated with AFW are not required to be entered.
D. inoperable, however the conditions and required actions associated with AFW are not required to be entered.
• Unit 1 is operating at rated power.
• ‘B’ HPSI pump tripped on overcurrent (86LO) 1 hour ago during a post maintenance run.
• A low level alarm was received on the “A” Essential Chill water surge tank.
• Area 3 reports a leak on the “A” HPSI pump room Essential ACU, HAA-Z01.
• Chill Water (EC) is isolated to HAA-Z01.
What is the current HPSI pump status?
HPSI Pump “A” is (1) and HPSI Pump “B” is (2) .
A. 1) operable (2) inoperable
B. 1) operable (2) operable
C. 1) inoperable (2) operable
D. 1) inoperable (2) inoperable
D. 1) inoperable (2) inoperable
Is the EW plant system directly INOPERABLE if you isolate EW to a Shutdown Cooling Heat Exchanger? Circle one of the following; • Yes • No Give your justification and reference.
Yes
Per LCO Basis 3.7.7 Essential Cooling Water (EW) System, isolation of the EW System to the SDC system heat exchanger is not acceptable and would render both the EW System and the SDC system inoperable. The EW System is inoperable in this situation because it is operating outside of the acceptable limits of the system.
Upon discovery of a failure to meet an LCO, what is/are the SROs’ responsibility (ies)?
A. The Required Actions of the associated Conditions shall be met, except as provided in LCO 3.0.5 and LCO 3.0.6.
B. The Required Actions of the associated Conditions shall be met, with no exceptions.
C. Plant Operations may continue providing a Justification for Continued Operation is requested.
D. Plant Management must be consulted as each occurrence will be different.
A. The Required Actions of the associated Conditions shall be met, except as provided in LCO 3.0.5 and LCO 3.0.6.
LCO 3.8.10, Distribution Systems – Shutdown, states that…
“The necessary portion of AC, DC, and AC vital instrument bus electrical power distribution
subsystems shall be OPERABLE to support equipment required to be OPERABLE.”
The bases for this LCO is:
The AC, DC, and AC vital instrument bus electrical power distribution subsystems required to be
OPERABLE in Modes 5 and 6 and during movement of irradiated fuel assemblies, provide
assurance that…
Which of the following will complete the bases for this LCO?
1. Systems to provide adequate coolant inventory makeup are available for the irradiated
fuel in the core.
2. Systems needed to mitigate a fuel handling accident are available.
3. System must be capable of maintaining rated frequency and voltage, and accepting
required loads during an accident, while connected to the ESF bus(es).
4. Systems necessary to mitigate the effects of events that can lead to core damage during
shutdown are available.
5. Instrumentation and control capability is available for monitoring and maintaining the unit
in a cold shutdown condition and refueling condition.
A. 1, 2, 4
B. 1, 2, 3
C. 2, 3, 4
D. 3, 4, 5
A. 1, 2, 4
During the performance of Physics Testing, rated thermal power has risen to 87%.
Which of the following actions is required per TS 3.1.10, Special Test Exceptions (STE)–Modes 1
and 2?
A. Immediately trip the reactor.
B. Immediately suspend physics testing.
C. Reduce thermal power to less than or equal to the test power plateau within 15 minutes.
D. Reduce thermal power to less than or equal to the test power plateau within 1 hour.
C. Reduce thermal power to less than or equal to the test power plateau within 15 minutes.
Given the following information from Tech Specs:
• Tech Spec 3.7.7 states … with one EW train inoperable, restore the EW train to OPERABLE status within 72 hours.
• Tech Spec 3.7.8 states … with one SP train inoperable, restore the SP train to OPERABLE status within 72 hours.
Given the following conditions:
0800 5/10 SP ‘A’ is declared inoperable due to a breaker problem.
0800 5/12 EW ‘A’ is declared inoperable due to bad pump seals.
1200 5/12 SP ‘A’ is restored to service.
Assuming 3.0.6 was implemented, when does EW ‘A’ have to be restored to service?
A. 0800 5/13
B. 0800 5/14
C. 0800 5/15
D. 1200 5/13
C. 0800 5/15
- Unit 1 is at 3% reactor power and stable.
- Tcold is 565° F.
- PZR Pressure is 2300 psia.
- PZR level is 29%.
Tech Spec Limiting Conditions for Operation (LCO) (1) is NOT MET and (2) will
restore compliance.
(1) 3.4.1, RCS, DNB parameters
(2) lowering RCS pressure
• 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 operator must restore compliance of RCS Pressure Safety Limits in Modes 3, 4 and 5 in 5 minutes, however in Modes 1 & 2 compliance must be restored within 1 hour. Modes 3, 4 and 5 are more limiting because the RCS may be at a:
A. lower temperature thereby making reactor vessel less ductile.
B. lower pressure placing us closer to DNBR limit.
C. higher pressure causing a higher pressure stress on the reactor vessel.
D. higher temperature causing a higher thermal stress on the reactor vessel.
A. lower temperature thereby making reactor vessel less ductile.
