ENS 43452
ENS Event | |
|---|---|
05:58 May 3, 2007 | |
| Title | Invalid System Actuation |
| Event Description | This event is being reported in accordance with 10 CFR 50.73(a)(1) and 10 CFR 50.73(a)(2)(iv)(A). This condition meets the criteria of 10 CFR 50.73(a)(2)(iv)(A) for any event or condition that results in manual or automatic actuation for any of the systems listed in paragraph 10 CFR 50.73(a)(2)(iv)(B). The specific requirements apply here to 'General containment isolation signals affecting containment isolation valves in more than one system.'
During the performance of surveillance instruction 'Low Pressure Coolant Injection (LPCI) 'B' and 'C' Initiation and Loss of EH12 Response Time Test,' the following valves auto closed during the test activities: - 1G61-F0075 (Containment Equipment Drain Inboard Isolation), - 1G61-F0165 (Containment Floor Drain Inboard Isolation), - 1P11-F0090 (Containment Pools Drain Inboard Isolation), and - 1P50-F140 (Containment Vessel Chilled Water Inboard Return MOV Isolation) The signals are considered to be invalid as the signals were a result of test activities and not actual plant conditions. The valve logic to close the valves was momentarily satisfied due to the sequence of electrical power restoration during the test; however, the test did not address the valve movement and the valve actuations could not be considered to be preplanned. The system actuations were considered to be partial, and the valves functioned successfully as designed. The event was captured within the corrective action program under condition report (CR) 07-19866. The resident inspector was notified of this event notification. |
| Where | |
|---|---|
Perry  Ohio (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+1329.32 h55.388 days <br />7.913 weeks <br />1.821 months <br />) | |
| Opened: | Thomas Stec 15:17 Jun 27, 2007 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Jun 27, 2007 |
| 43452 - NRC Website
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WEEKMONTHYEARENS 552632021-03-23T04:37:00023 March 2021 04:37:00
[Table view]10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification for an Invalid Diesel Generator Initiation ENS 510842015-03-26T20:29:00026 March 2015 20:29:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification for an Invalid Primary Containment and Drywell Isolation Valve Actuation ENS 504502014-07-26T17:13:00026 July 2014 17:13:00 10 CFR 50.73(a)(1), Submit an LER Electrical Transient Causes an Invalid System Actuation ENS 483192012-07-24T00:57:00024 July 2012 00:57:00 10 CFR 50.73(a)(1), Submit an LER Invalid System Actuations ENS 434522007-05-03T05:58:0003 May 2007 05:58:00 10 CFR 50.73(a)(1), Submit an LER Invalid System Actuation ENS 405982004-02-22T15:16:00022 February 2004 15:16:00 10 CFR 50.73(a)(1), Submit an LER Partial Rps Actuation During Testing at Perry ENS 404692003-11-29T20:26:00029 November 2003 20:26:00 10 CFR 50.73(a)(1), Submit an LER Invalid System Actuation ENS 401262003-08-02T01:18:0002 August 2003 01:18:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Division 2 Balance-Of-Power Inboard Isolation Valves 2021-03-23T04:37:00 | |