ENS 48574
ENS Event | |
|---|---|
19:14 Dec 10, 2012 | |
| Title | Loss of Emergency Response Capability - Tsc/Osc Unavailable |
| Event Description | Unavailability of TSC/OSC Ventilation System due to Ventilation Fan (FN-1) failure to start.
On Monday, December 10, 2012, at 1414 hours0.0164 days <br />0.393 hours <br />0.00234 weeks <br />5.38027e-4 months <br /> with Pilgrim Nuclear Power Station (PNPS) at 100% core thermal power, the Technical Support Center (TSC)/Operations Support Center (OSC) emergency ventilation system was declared non-functional due to the failure of a fan (FN-1) to start during a scheduled surveillance (8.B.24). The balance of the TSC/OSC ventilation is not affected by this event and remain available. Under certain accident conditions the TSC/OSC may become unavailable due to inability of the filtration system to maintain a habitable atmosphere. Compensatory measures exist to relocate TSC/OSC personnel to the Emergency Offsite Facility (EOF) and the Control Room. In the event of a declared emergency, all OSC personnel will report to the Control Room Annex. TSC minimum staffing will report to the Control Room and all other TSC staff will report to the EOF. The troubleshooting is being worked as a high priority and is conservatively scheduled to be completed by 1900 hours0.022 days <br />0.528 hours <br />0.00314 weeks <br />7.2295e-4 months <br /> on Wednesday, November 12, 2012. A follow-up to this notification will be made when the TSC/OSC is returned to functional status or if the maintenance effort is significantly extended. The licensee has notified the NRC Senior Resident Inspector. This notification is being made in accordance with 10 CFR 50.72(b)(3)(xiii) due to the loss of an emergency response facility.
This is an informational update to notification EN 48574 made on Monday December 10, 2012. On Wednesday, December 12, 2012 at 1550 [EST] with Pilgrim Nuclear Power Station (PNPS) at 100% core thermal power, the Technical Support Center (TSC) / Operations Support Center (OSC) emergency ventilation system was returned to functional status following repair and successful post maintenance testing of the fan (FN- 1). Notification has been made to the Emergency Response Organization that the normal facility activation capability has been restored. Additionally, in our initial notification there was a documentation error in that we stated November 12, 2012 as the expected return to service vice the correct date of today, December 12, 2012. The licensee has notified the NRC Senior Resident Inspector that the TSC/OSC emergency ventilation has been restored to functional status. Notified the R1DO (Holody). |
| Where | |
|---|---|
| Pilgrim Massachusetts (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+0.17 h0.00708 days <br />0.00101 weeks <br />2.32866e-4 months <br />) | |
| Opened: | Paul Gallant 19:24 Dec 10, 2012 |
| NRC Officer: | Charles Teal |
| Last Updated: | Dec 12, 2012 |
| 48574 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Pilgrim with 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
WEEKMONTHYEARENS 532422018-03-03T04:15:0003 March 2018 04:15:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Potential Loss of Offsite Response Capabilities ENS 530412017-10-30T06:47:00030 October 2017 06:47:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Severe Weather Causes Loss of Power to Support Buildings ENS 515232015-11-09T13:00:0009 November 2015 13:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Unavailable Due to Planned Maintenance ENS 507902015-02-05T18:00:0005 February 2015 18:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Sea Water Intake Bay Level Instrumentation Due to Loss of Instrument Air ENS 502732014-07-11T12:23:00011 July 2014 12:23:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Assessment Capability - Loss of Power to the Plant Process Computer ENS 499052014-03-12T17:15:00012 March 2014 17:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communication - Federal Telephone System (Fts) ENS 496052013-12-03T18:30:0003 December 2013 18:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Communications Capability- Ep Conferencing Lines Unavailable ENS 490132013-05-08T21:00:0008 May 2013 21:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Main Annunciator System Inoperable Due to Maintenance ENS 489972013-05-03T09:42:0003 May 2013 09:42:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Main Control Room Annunciators During Planned Spds Maintenance ENS 487432013-02-11T19:35:00011 February 2013 19:35:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Response Capability - Joint Information Center (Jic) Unavailable ENS 485742012-12-10T19:14:00010 December 2012 19:14:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Response Capability - Tsc/Osc Unavailable ENS 476152012-01-23T11:33:00023 January 2012 11:33:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Out of Service Due to Planned Maintenance ENS 462712010-09-23T10:00:00023 September 2010 10:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Response Capability - Tsc/Osc Is Unavailable ENS 458402010-04-14T21:03:00014 April 2010 21:03:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Response Organization In-Plant Notification System ENS 452192009-07-21T18:05:00021 July 2009 18:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Response Capability - Tsc/Osc Is Unavailable Due to Hvac System Trouble ENS 445092008-09-22T10:00:00022 September 2008 10:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center and Operational Support Center Unavailable ENS 436672007-09-26T18:55:00026 September 2007 18:55:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center and Operations Support Center Ventilation Inoperable ENS 404482004-01-14T15:00:00014 January 2004 15:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Sirens Inoperable/Degraded Due to Potential Amplifier Problems 2018-03-03T04:15:00 | |