ENS 44560
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ENS Event | |
|---|---|
05:49 Oct 11, 2008 | |
| Title | Discovery of an After-The-Fact Notification of Unusual Event |
| Event Description | At 0049 on 10/11/08 Letdown Relief valve BG8117 lifted prior to set point, resulting in Pressurizer water inventory being diverted the Pressurizer Relief Tank. Letdown was isolated within 13 minutes, isolating the leakage. Upon review of the level trends of the Pressurizer Relief Tank level changes, approximately 574 gallons were diverted from the Reactor Coolant system. This would result in an RCS leakage rate of 44 gpm of RCS Identified Leakage. At the time that the calculation of leakage rate was discovered, it was immediately recognized that this met the requirements for EAL 4R, 'RCS Identified Leakage greater than 25 gpm'. As a result of identification that the criteria of an EAL was exceeded, and no longer existed, a notification was made to the NRC Operation Center in accordance with 10 CFR50.72(a)(1)(i).
Licensee has notified NRC Resident Inspector and will notify state and local agencies on the next business day. |
| Where | |
|---|---|
Callaway  Missouri (NRC Region 4) | |
| Reporting | |
| Other Unspec Reqmnt | |
| Time - Person (Reporting Time:+-3.03 h-0.126 days <br />-0.018 weeks <br />-0.00415 months <br />) | |
| Opened: | Steve Kochert 02:47 Oct 11, 2008 |
| NRC Officer: | John Knoke |
| Last Updated: | Oct 11, 2008 |
| 44560 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Hot Standby (0 %) |
| After | Hot Standby (0 %) |
WEEKMONTHYEARENS 559722022-05-02T04:05:0002 May 2022 04:05:00
[Table view]Other Unspec Reqmnt, 10 CFR 50.73(a)(1), Submit an LER Invalid Specified System Actuation ENS 445602008-10-11T05:49:00011 October 2008 05:49:00 Other Unspec Reqmnt Discovery of an After-The-Fact Notification of Unusual Event ENS 428522006-09-08T15:15:0008 September 2006 15:15:00 Other Unspec Reqmnt Discovery of After-The-Fact Emergency Condition: Inapproriate Change Made to Emergency Action Level 3J Back in 1997 Caused an Emergency, Alert, Not to Be Declared. ENS 413262005-01-12T19:30:00012 January 2005 19:30:00 Other Unspec Reqmnt, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition 24 Hour Condition of License Report Regarding Halon System Actuator Port Connection Error ENS 412052004-09-18T22:35:00018 September 2004 22:35:00 Other Unspec Reqmnt Discovery of After-The-Fact Emergency Condition (Unusual Event) ENS 407052004-04-26T22:11:00026 April 2004 22:11:00 Other Unspec Reqmnt Technical Specifications Required Report of Steam Generator Defective Tubes 2022-05-02T04:05:00 | |
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