ENS Event | |
|---|---|
04:43 Mar 11, 2013 | |
| Title | Invalid Actuation Of The Auxiliary Feedwater System |
| Event Description | This 60-day telephone notification is provided in accordance with 10 CFR 50.73(a)(1) to report an invalid actuation of the Unit 3 Auxiliary Feedwater (AFW) System reportable in accordance with 10 CFR 50.73(a)(2)(iv)(A).
On March 11,2013 at approximately 0043 [EDT], while starting the 3B Steam Generator Feed Pump (SGFP) for a one minute run, both trains of AFW started. Operators then manually closed the AFW flow control valves. AFW Trains 2 and 1 were restored to operable standby status at approximately 0112 [EDT] and 0117 [EDT], respectively. AFW actuation occurred because of a misunderstood procedure step and unnecessarily placed jumpers in AFW actuation logic in preparation for start of the 3B SGFP, which resulted in the invalid signal. At the time, the level in the steam generators was being maintained by the 3A Standby Steam Generator Feed Pump (SBSGFP). Because no actual loss of normal feedwater condition existed (with the 3A SBSGFP in service) which required AFW to start, and the start was not in response to actual plant conditions satisfying the requirements for actuation, this event is an invalid actuation. The licensee will notify the NRC Resident Inspector. |
| Where | |
|---|---|
Turkey Point  Florida (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+1427.45 h59.477 days <br />8.497 weeks <br />1.955 months <br />) | |
| Opened: | Paul Czaya 16:10 May 9, 2013 |
| NRC Officer: | John Shoemaker |
| Last Updated: | May 9, 2013 |
| 49017 - NRC Website
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WEEKMONTHYEARENS 527962017-04-10T17:47:00010 April 2017 17:47:00
[Table view]10 CFR 50.73(a)(1), Submit an LER Invalid System Actuation During Testing ENS 515472015-11-18T08:26:00018 November 2015 08:26:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of 3A Emergency Diesel Generator (Edg) ENS 505492014-10-01T20:56:0001 October 2014 20:56:00 10 CFR 50.73(a)(1), Submit an LER Two Invalid Specified System Actuations of Safety Injection ENS 490172013-03-11T04:43:00011 March 2013 04:43:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of the Auxiliary Feedwater System 2017-04-10T17:47:00 | |