ENS 50133
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ENS Event | |
|---|---|
05:48 Apr 16, 2014 | |
| Title | 60-Day Optional Telephonic Notification for Inadvertent Fast Start of Diesel Generator During Testing |
| Event Description | In accordance with 10 CFR 50.73(a)(2)(iv)(A), this 60-day telephone notification addresses an unplanned, invalid actuation of the 2B-B Diesel Generator (DG). The event occurred on 04/16/2014 at approximately 0148 EDT while Watts Bar (WBN) Unit 1 was in Mode 6 for a refueling outage. At this time, an 18 month performance of 0-SI-82-6, '18 Month Loss of Offsite Power DG 2B-B,' was in process which required that 2-HS-82-113 (Maint-Auto Hand Switch Generator 2B-B) be placed in the Auto position. When this action was taken, the 2B-B DG experienced a fast start. At 0314 EDT on 04/16/2014, while in the process of stopping the DG, the DG experienced a second fast start. For both starts of the 2B-B DG, the DG successfully functioned and achieved its rated speed of 900 RPM. Following the second start of the 2B-B DG, an emergency stop was performed on the DG in accordance with SOI 82.04, 'Diesel Generator (DG) 2B-B.' The cause of the invalid starts was determined to be an intermittent open between a relay pin on the R3 relay (DG start relay) and the relay base due to oxidation. This event was documented in TVA's corrective action program as Problem Evaluation Report (PER) 872575.
The NRC Resident Inspector has been informed of this notification. |
| Where | |
|---|---|
Watts Bar  Tennessee (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+897.45 h37.394 days <br />5.342 weeks <br />1.229 months <br />) | |
| Opened: | David Allen 15:15 May 23, 2014 |
| NRC Officer: | Charles Teal |
| Last Updated: | May 23, 2014 |
| 50133 - NRC Website
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WEEKMONTHYEARENS 570772024-02-16T02:24:00016 February 2024 02:24:00
[Table view]10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Emergency Diesel Generators ENS 562742022-11-24T21:21:00024 November 2022 21:21:00 10 CFR 50.73(a)(1), Submit an LER 60-DAY Optional Telephonic Notification of Invalid Actuation of Containment Ventilation Isolation Valves ENS 548702020-07-23T13:56:00023 July 2020 13:56:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification for Two Invalid Containment Ventilation Isolation Actuations ENS 542202019-07-26T14:03:00026 July 2019 14:03:00 10 CFR 50.73(a)(1), Submit an LER Invalid Containment Ventilation Isolation Actuation ENS 538402018-12-02T05:28:0002 December 2018 05:28:00 10 CFR 50.73(a)(1), Submit an LER Invalid Containment Ventilation Isolation Actuation ENS 527902017-04-28T09:00:00028 April 2017 09:00:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification for an Invalid Auxiliary Feedwater Actuation ENS 525392016-12-15T18:32:00015 December 2016 18:32:00 10 CFR 50.73(a)(1), Submit an LER 60 Day Optional Telephonic Notification for an Invalid Containment Ventilation Isolation Actuation ENS 520012016-04-14T18:06:00014 April 2016 18:06:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification for an Invalid Containment Vent Isolation Actuation ENS 511522015-04-15T16:07:00015 April 2015 16:07:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuations of the Containment Ventilation Isolation System ENS 510792015-03-17T17:06:00017 March 2015 17:06:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Auxiliary Feedwater System During Electrical Testing ENS 501332014-04-16T05:48:00016 April 2014 05:48:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification for Inadvertent Fast Start of Diesel Generator During Testing ENS 482042012-06-19T03:49:00019 June 2012 03:49:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Containment Ventilation Isolation ENS 441602008-02-23T04:00:00023 February 2008 04:00:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Verbal Notification of Invalid Specified System Actuation ENS 411832004-09-15T14:14:00015 September 2004 14:14:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Containment Vent Isolation Valve 2024-02-16T02:24:00 | |
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