ENS Event | |
|---|---|
11:04 Apr 3, 2005 | |
| Title | Containment Isolation Valve Closure |
| Event Description | This telephone notification is provided in accordance with 10 CFR 50.73(a)(1), to report an invalid actuation reportable under 10 CFR 50.73(a)(2)(iv)(A), 'Any event or condition that resulted in manual or automatic actuation of any system listed in paragraph (a)(2)(iv)(B).' General containment isolation signals affecting containment isolation valves in more than one system are identified in paragraph (a)(2)(iv)(B).
On April 3, 2005, at 0604 hours0.00699 days <br />0.168 hours <br />9.986772e-4 weeks <br />2.29822e-4 months <br />, with Unit 2 in Mode 1, 'Power Operation,' fuse 2-902-3-RR-F20 in the 902-3 panel failed, which resulted in a partial Group 2 Primary Containment Isolation. The containment isolation signal affected containment isolation valves in more than one system. All affected containment isolation valves operated as designed. The fuse was successfully replaced and all affected components were restored to operable status. The fuse was replaced at 0630 on 4/3/2005 and isolation valves were restored to the normal at-power lineup at 0637. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Dresden  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+874.55 h36.44 days <br />5.206 weeks <br />1.198 months <br />) | |
| Opened: | Gary Sipe 21:37 May 9, 2005 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | May 9, 2005 |
| 41682 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (97 %) |
| After | Power Operation (97 %) |
WEEKMONTHYEARENS 497322013-11-17T16:00:00017 November 2013 16:00:00
[Table view]10 CFR 50.73(a)(1), Submit an LER 60-Day Report for Invalid System Actuation of Emergency Diesel Generators ENS 471182011-06-05T03:43:0005 June 2011 03:43:00 10 CFR 50.73(a)(1), Submit an LER Invalid Signal Caused a Partial Containment System Isolation ENS 455922009-11-06T21:32:0006 November 2009 21:32:00 10 CFR 50.73(a)(1), Submit an LER ENS 452162009-05-25T21:15:00025 May 2009 21:15:00 10 CFR 50.73(a)(1), Submit an LER Optional 60-Day Report of Invalid Specified System Actuation ENS 422012005-11-06T07:19:0006 November 2005 07:19:00 10 CFR 50.73(a)(1), Submit an LER Invalid Containment Isolation Signal Generated ENS 420512005-09-08T15:08:0008 September 2005 15:08:00 10 CFR 50.73(a)(1), Submit an LER Invalid System Actuation ENS 416822005-04-03T11:04:0003 April 2005 11:04:00 10 CFR 50.73(a)(1), Submit an LER Containment Isolation Valve Closure 2013-11-17T16:00:00 | |