Week 10 Flashcards
• The plant is at 100% power.
• A shutdown CEA drops into the core.
In accordance with Tech Specs the operator should ….
A. not enter LCO 3.1.6, entry is not required for 2 hours.
B. enter LCO 3.1.6 immediately and immediately restore shutdown CEAs to within limits.
C. enter LCO 3.1.6 immediately and restore shutdown CEAs to within limits in the next 2 hours.
D. enter LOC 3.1.6 immediately and restore shutdown CEAs to within limits in the next 4 hours.
C. enter LCO 3.1.6 immediately and restore shutdown CEAs to within limits in the next 2 hours.
- The unit is at rated power.
- A Regulating Group CEA slips 10 inches into the core.
Based on these conditions, the applicable COLR graph requires that the crew BEGIN reducing power within ______ minutes of the event.
A. 2
B. 10
C. 30
D. 45
B. 10
• The Plant is at 100% power. • Tc - 565°F. • Pressurizer Pressure - 2250 psia. • CEA #14 deviates from group 5 by 15 inches and is being troubleshot by I&C. The operator should ...
A. be in Mode 3 within 6 hours.
B. open the RTCBs immediately
C. open the RTCBs within 2 hours.
D. reduce thermal power in accordance with the COLR within 1 hour.
D. reduce thermal power in accordance with the COLR within 1 hour.
• The plant is in Mode 3 with the reactor trip circuit breakers closed and CEAs capable of being
withdrawn.
• It is discovered that adequate SDM does not exist.
In accordance with TS 3.1.2 SDM Reactor Trip Breakers Closed, the operating crew must initiate boration within a maximum of minutes.
A. 10
B. 15
C. 30
D. 60
B. 15
The plant is at 100% power when CRS discovers that the surveillance requirement (SR) to verify operable CEA position indicator channels indicate within 5.2 inches of each other was not performed within the last 17 hours (SR 3.1.5.2). The required frequency of SR 3.1.5.2 is 12 hours.
The operator should:
A. invoke SR 3.0.3 but not enter into LCO 3.1.5, because the SR may be delayed for 24 hours from the time of discovery, by invoking SR3.0.3
B. declare entry into LCO 3.1.5 immediately & perform the SR.
C. invoke SR 3.0.3 and declare entry into LCO 3.1.5 immediately and reduce thermal power in accordance with the limits in the COLR.
D. declare entry into LCO 3.1.5 immediately & perform the SR within 1 hour.
A. invoke SR 3.0.3 but not enter into LCO 3.1.5, because the SR may be delayed for 24 hours from the time of discovery, by invoking SR3.0.3
• Unit 1 is operating at 100% power.
• A Group 4 CEA drops to the bottom of the core (The unit does not trip).
• The crew responds in accordance with the abnormal operating procedure for a dropped rod.
• The I&C technician contacts the control room and informs them that the dropped CEA can be
recovered.
Based on these conditions, the CRS declares L.C.O. (1) NOT MET and (2) .
A. (1) 3.1.5 Control Element Assembly (CEA ) Alignment
(2) restore CEA alignment to avoid violation of Reactor Coolant System integrity.
B. (1) 3.1.6 Shutdown Control Element Assembly (CEA) Insertion Limits
(2) restore the rod to within 6.6 inches of all other group 4 CEAs to ensure Shutdown Margin
C. (1) 3.1.7 Regulating Control Element Assembly (CEA ) Insertion Limits
(2) commence a unit shutdown within 1 hour to prevent exceeding acceptable fuel design limits.
D. (1) 3.1.8 part Strength Control Element Assembly Insertion Limits
(2) declare CPCs INOPERABLE until dropped CEA within 6.6 inches of all other group 4 CEAs
A. (1) 3.1.5 Control Element Assembly (CEA ) Alignment
(2) restore CEA alignment to avoid violation of Reactor Coolant System integrity.
With the plant operating at 100% power one CEA slips 15 inches into the core.
Which ONE of the following describes the required operator action within the next hour and the
basis for that action?
This event requires a (1) of thermal power providing assurance (2).
A. (1) reduction (2) of fuel integrity during continued operation
B. (1) reduction (2) that minimum moderator temperature coefficient is maintained
C. (1) stabilization (2) of fuel integrity during continued operation
D. (1) stabilization (2) that minimum moderator temperature coefficient is maintained
A. (1) reduction (2) of fuel integrity during continued operation
Given only the following information, which criteria can be used to determine when a CEA is considered fully withdrawn?
A. ≥ 147.75” withdrawn (Pulse Counter).
B. ≥ 150” withdrawn (Pulse Counter).
C. at the UEL.
D. at the UGS position and greater.
C. at the UEL.
• The plant is at 70% power.
• All CEAs are fully withdrawn at 150 inches.
• CEA 76 slips to 142 inches withdrawn.
What are the required Tech Spec actions required to maintain the unit in Mode 1?
Lower thermal Power a minimum of …
A. 10% within one hour and restore CEA 76 to ≥ 144.6 within 2 hours.
B. 15% within one hour and restore CEA 76 to ≥ 144.6 inches within 2 hours.
C. 10% within one hour and restore CEA 76 to ≥ 147.75 inches within 2 hours.
D. 15% within one hour and restore CEA 76 to ≥ 147.75 inches within 2 hours.
C. 10% within one hour and restore CEA 76 to ≥ 147.75 inches within 2 hours.
• The plant is at 100% power
• Main feed pump A trips causing a RPCB actuation
• Groups 4 & 5 have dropped into the core
In accordance with Technical Specifications the operator should:
A. not enter LCO 3.1.7, entry is not required for 2 hours.
B. enter LCO 3.1.7, immediately restore regulating CEAs to within limits within 4 hours.
C. enter LCO 3.1.7 immediately and restore regulating CEAs to within limits in the next 2 hours.
D. not enter LCO 3.1.7, but regulating CEAs must be restored within 2 hours or power must be reduced as specified in the COLR.
A. not enter LCO 3.1.7, entry is not required for 2 hours.
• Unit 1 is operating at 80% power.
• Engineering informs the operating crew that there is a problem with Reactor Trip Circuit breakers (RTCB) #1 and #3.
• This problem will impact their ability to open.
Based on these conditions, the operating crew is required to open…
A. RTCBs #1 and #3 immediately.
B. RTCBs #1 and #3 within 1 hour.
C. either RTCBs #1 or #3 immediately.
D. either RTCBs #1 or #3 within 1 hour.
A. RTCBs #1 and #3 immediately.
- Unit 2 is at 19% power and exiting a Short Notice Outage.
- Axial Shape Index (ASI) is -0.35.
The Reactor Engineer supporting the crew stated to the Shift Manager that increasing power
would reduce ASI to approximately -0.25 within 1 hour. The CRS also noted that the SR 3,2.5.1 for monitoring ASI also has a note that states: “Not required to be performed until 2 hours after MODE 1 with THERMAL POWER > 20% RTP.”
A risk evaluation for exceeding 20% in the current condition has NOT been performed. The
crew should:
A) Remain less than 20% power and reduce ASI to within limits, because exceeding 20% is NOT ALLOWED by Tech Specs.
B) Raise power to >20% and restore ASI to within limits within one hour with the power ascension as the SR allows 2 hours to perform the ST.
C) Raise power to >20% and restore ASI to within limits within one hour with the power ascension as LCO 3.0.4 would allow going greater than 20% power when
not in compliance with LCO 3.2.5.
D) Even though there is no TS restriction, the crew should attempt to restore ASI to within limits before increasing power.
A) Remain less than 20% power and reduce ASI to within limits, because exceeding 20% is NOT ALLOWED by Tech Specs.
• Unit 2 is at 100% power.
• CEA exercising had been completed the previous shift.
• Shutdown CEA 36 currently has an inoperable pulse counter, but both Reed Switch Position Transmitters are operable.
• The CEA was left at its Upper Electrical Limit (UEL) following CEA exercising, as indicated by the lit UEL indication on CEDMCs, and both RSPTs indicate 150” withdrawn.
Subsequently, the UEL light goes out for CEA 36. A lamp check shows the light is still good.
Both RSPTs still indicate 150” withdrawn. Per Technical specifications:
A) No entry into TS Conditions are required as LCO 3.1.5 only requires 2 of the 3 position indications to be operable.
B) Enter Condition B of LCO 3.1.5 for the loss of the UEL.
C) Enter Condition A of LCO 3.1.6 for the CEA position not being within limits.
D) Enter BOTH Condition A of LCO 3.1.6 and Condition B of LCO 3.1.5.
C) Enter Condition A of LCO 3.1.6 for the CEA position not being within limits.
