ENS 45517
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ENS Event | |
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08:05 Nov 24, 2009 | |
Title | Unusual Event - Reactor Coolant System Leakage Greater than 25 Gpm |
Event Description | Beaver Valley Unit 2 declared an unusual event due to reactor coolant system unidentified leakage greater than 25 GPM into the pressurizer relief tank. Leakage occurred during shutdown of the residual heat removal system Train-A. The Train-A suction relief valve lifted due to pressure from the in-service Train-B residual heat [removal] system. The leakage has been stopped by isolating Train-A RHR from Train-B RHR. The duration of relief valve lifting was about 9 minutes. The pressurizer relief tank remained intact. All other systems functioned as designed and the plant is stable. Containment was closed at time of the event. No radioactive release occurred.
The licensee terminated the unusual event at 0404 EST. The licensee notified the NRC Resident Inspector.
Licensee clarified that the event was due to identified leakage not unidentified leakage as stated in the paragraph above. Notified R1DO. |
Where | |
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Beaver Valley Pennsylvania (NRC Region 1) | |
Reporting | |
Emergency class: | Unusual Event |
10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
Time - Person (Reporting Time:+-4.42 h-0.184 days <br />-0.0263 weeks <br />-0.00605 months <br />) | |
Opened: | Dan Schwer 03:40 Nov 24, 2009 |
NRC Officer: | Vince Klco |
Last Updated: | Nov 24, 2009 |
45517 - NRC Website
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Unit 2 | |
---|---|
Reactor critical | Not Critical |
Scram | No |
Before | Hot Shutdown (0 %) |
After | Hot Shutdown (0 %) |
Beaver Valley with 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | |
WEEKMONTHYEARENS 554132021-08-18T04:24:00018 August 2021 04:24:00
[Table view]10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notification of Unusual Event Declared Due to Fire Alarms in Cable Tunnel ENS 525132017-01-27T11:41:00027 January 2017 11:41:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Unverified Fire Alarm in Containment ENS 516312016-01-01T21:34:0001 January 2016 21:34:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Unverified Fire Alarm in Containment ENS 498652014-03-02T05:13:0002 March 2014 05:13:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due a Fire Alarm in the Containment Building ENS 495052013-11-05T23:28:0005 November 2013 23:28:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Notification of Unusual Event Due to Explosion and Fire in the Turbine Building ENS 491162013-06-14T12:35:00014 June 2013 12:35:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to High Co2 Levels in the Turbine Building ENS 455172009-11-24T08:05:00024 November 2009 08:05:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event - Reactor Coolant System Leakage Greater than 25 Gpm ENS 451432009-06-19T01:39:00019 June 2009 01:39:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Emergency Declared Due to Indicated Fire in Emergency Response Facility Substation 2021-08-18T04:24:00 | |
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