ENS Event | |
|---|---|
17:55 Aug 5, 2010 | |
| Title | Discovery of After-The-Fact Emergency Condition Meeting Unusual Event Criteria |
| Event Description | {{#Wiki_filter:At 1345 EDT, following maintenance on 1-CH�LCV-1115A, VCT divert valve, testing was commenced. At 1355 EDT, the valve failed to the full divert position and could not be repositioned from the normal control system, resulting in 75 gpm letdown flow being diverted to the gas stripper.
At 1401 EDT, the normal letdown flowpath was isolated in accordance with plant procedures and the leakage isolated. The identified flow rate exceeded the threshold for entry into a Notice of Unusual Event under EAL tab SU6.1 due to identified leakage greater than 25 gpm. The licensee will inform State and local agencies and has notified the NRC Resident Inspector. }} |
| Where | |
|---|---|
North Anna  Virginia (NRC Region 2) | |
| Reporting | |
| Emergency class: | Unusual Event |
| Other Unspec Reqmnt | |
| Time - Person (Reporting Time:+-3.03 h-0.126 days <br />-0.018 weeks <br />-0.00415 months <br />) | |
| Opened: | Page Kemp 14:53 Aug 5, 2010 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Aug 5, 2010 |
| 46153 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 474972011-12-05T13:47:0005 December 2011 13:47:00
[Table view]Other Unspec Reqmnt Discovery of After-The-Fact Emergency Condition - Unusual Event ENS 466972011-03-24T18:00:00024 March 2011 18:00:00 Other Unspec Reqmnt Non-Compliance with Nuhoms Technical Specification ENS 461532010-08-05T17:55:0005 August 2010 17:55:00 Other Unspec Reqmnt Discovery of After-The-Fact Emergency Condition Meeting Unusual Event Criteria ENS 454602009-10-23T20:34:00023 October 2009 20:34:00 Other Unspec Reqmnt, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Plant Shutdown Due to Excess Letdown Heat Exchanger Tube Leak and After-The-Fact Unusual Event ENS 450132009-04-22T09:00:00022 April 2009 09:00:00 Other Unspec Reqmnt Discovery of After-The-Fact Emergency Condition - Alert - Due to Fire Damage to Safety-Related Breaker ENS 403282003-11-17T16:50:00017 November 2003 16:50:00 Other Unspec Reqmnt Significant Leak in Fire Protection Header 2011-03-24T18:00:00 | |