ENS 44597
ENS Event | |
|---|---|
22:00 Oct 23, 2008 | |
| Title | Information Only Notification Regarding Plant Shutdown |
| Event Description | This is an information only notification that Beaver Valley Power Station Unit No. 2 has initiated a plant shutdown as of 1800 on 10/23/08, a proactive measure, to complete repairs on the Train 'A' Low Head Safety Injection (LHSI) Pump 2SIS-P21A. On 10/19/08 at 2326, Beaver Valley Power Station Unit No. 2 removed 2SIS-P21A from service for routine preventive maintenance. Technical Specification 3.5.2, Condition A was entered during this maintenance activity with the Required Action A.1 to restore 2SIS-P21A to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> (2326 on 10/22/08). On 10/20/08, during this maintenance; the pump shaft was unable to be rotated by hand after approximately 3/4 revolution. The pump was then disassembled and the apparent cause was determined to be that the pump rotating assembly was not centralized in the casing bore resulting in minimal clearance between the pump wear rings. On 10/22/08, First Energy Nuclear Operating Company (FENOC) requested enforcement discretion from the NRC to permit an additional 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> of time to complete repairs on the pump. The NRC verbally granted FENOC's request for enforcement discretion on 10/22/08 at 1105. The enforcement discretion period will expire on 10/24/08 at 1126. Since unexpected difficulties have delayed the reassembly of the pump, FENOC management decided to proactively shutdown Beaver Valley Power Station Unit No.2 beginning at 1800 on 10/23/08. While pump reassembly and testing to restore operability may still be completed by the end of the enforcement discretion period, FENOC management determined that it was more prudent to shutdown the unit at this time so that the Operations crews are not placed under undue time pressure to reach Mode 3 conditions.
The licensee notified the NRC Resident Inspector.
This 4-hour notification is to report that Beaver Valley Power Station Unit No. 2 has initiated a manual reactor shutdown at 0600 on 10/24/08 in accordance with Technical Specification 3.5.2, 'ECCS - Operating'. On 10/19/08 at 2326 Beaver Valley Power Station Unit No. 2 removed 2SIS-P21A (Train 'A' Low Head Safety Injection [LHSI] Pump) from service for routine preventive maintenance. Technical Specification 3.5.2 was not met during this maintenance activity for two operable trains of Emergency Core Cooing System and Condition A was entered with the Required Action A.1 to restore 2SIS-P21A to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> (2326 on 10/22/08). Problems were unexpectedly encountered during this maintenance; the pump shaft was unable to be rotated by hand after approximately 3/4 revolution. The pump was disassembled and the apparent cause was determined to be that the pump rotating assembly was not centralized in the casing bore resulting in minimal clearance between the pump wear rings. On 10/22/08 FirstEnergy Nuclear Operating Company requested enforcement discretion from the NRC to permit an additional 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> of time to complete reassembly of the pump. The NRC verbally granted FENOC's request for enforcement discretion on 10/22/08 at 1105. The enforcement discretion period would have expired on 10/24/08 at 1126. Since unexpected difficulties have delayed the reassembly of the pump, FENOC management decided to proactively shutdown Beaver Valley Power Station Unit No.2 beginning at 1800 on 10/23/08 (reference Information Only EN#44597). Beaver Valley Power Station Unit No. 2 entered Mode 3 at 0519 on 10/24/08 as part of the planned controlled shutdown. On 10/24/08 at 0600, Technical Specification 3.5.2, Condition B was entered based on a determination that the projected work completion time for restoring 2SIS-P21A to operable status would not meet the conditions of the enforcement discretion. Technical Specification 3.5.2, Required Action B.1 was met since the plant was in Mode 3, the plant is continuing the cooldown to be in Mode 4 within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> per Required Action B.2. This event is being reported as a Technical Specification required shutdown pursuant to 10CFR50.72(b)(2)(i). No radiological release occurred due to this event. The licensee notified the NRC Resident Inspector. Notified R1DO (Cahill). |
| Where | |
|---|---|
| Beaver Valley Pennsylvania (NRC Region 1) | |
| Reporting | |
| Information Only 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-3.58 h-0.149 days <br />-0.0213 weeks <br />-0.0049 months <br />) | |
| Opened: | Ken Tiefenthal 18:25 Oct 23, 2008 |
| NRC Officer: | Jeff Rotton |
| Last Updated: | Oct 24, 2008 |
| 44597 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (99 %) |
Beaver Valley with Information Only, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
WEEKMONTHYEARENS 535482018-08-12T04:00:00012 August 2018 04:00:00
[Table view]10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown En Revision Imported Date 8/17/2018 ENS 534192018-05-22T04:00:00022 May 2018 04:00:00 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown En Revision Imported Date 6/22/2018 ENS 467442011-04-10T07:45:00010 April 2011 07:45:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Manual Reactor Trip While Performing a Technical Specification Required Shutdown ENS 445972008-10-23T22:00:00023 October 2008 22:00:00 Information Only, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Information Only Notification Regarding Plant Shutdown ENS 429172006-10-18T01:00:00018 October 2006 01:00:00 Information Only Reactor Vessel Head Nozzle Weld Area Flaw ENS 426062006-05-26T18:15:00026 May 2006 18:15:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Solid State Protection System Train Inoperable ENS 424912006-04-11T13:24:00011 April 2006 13:24:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown ENS 404342004-01-10T06:27:00010 January 2004 06:27:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Initiated and Subsequently Terminated 2018-08-12T04:00:00 | |