ENS Event | |
|---|---|
07:09 May 6, 2011 | |
| Title | Discovery of an After-The-Fact Unusual Event |
| Event Description | Operators were making preparations to fill the Containment Spray System riser to support outage activities. At 0204 CDT, when Containment Spray Riser Isolation Valve CS-125A was opened, pressurizer level began to lower. The licensee suspects leak by of a valve in the Shutdown Cooling System. At 0214 CDT, the leak was stopped. Pressurizer level was lowered by 2.6%.
After reviewing the event, the licensee determined that the leak rate was greater than 25 gpm which would have resulted in a declaration of an Unusual Event under EAL CU1. Since the event had concluded, no declaration was made. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Waterford  Louisiana (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: | Michael Shumate 04:07 May 6, 2011 |
| NRC Officer: | Howie Crouch |
| Last Updated: | May 6, 2011 |
| 46824 - NRC Website
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Unit 3 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Cold Shutdown (0 %) |
| After | Cold Shutdown (0 %) |
WEEKMONTHYEARENS 523372016-10-31T16:00:00031 October 2016 16:00:00
[Table view]Other Unspec Reqmnt Supplemental Cooling Inoperable During Movement of Dry Cask Storage Hi-Track Transfer Cask ENS 468242011-05-06T07:09:0006 May 2011 07:09:00 Other Unspec Reqmnt Discovery of an After-The-Fact Unusual Event ENS 406322004-04-01T01:19:0001 April 2004 01:19:00 Other Unspec Reqmnt, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition New Worst Case Single Failure May Exceed 10 Cfr 50.46 Acceptance Criterion for Sbloca ENS 405192004-02-13T11:25:00013 February 2004 11:25:00 Other Unspec Reqmnt 24 Hour Notification Per Licensee Condition 2.F 2016-10-31T16:00:00 | |