ENS 45076
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ENS Event | |
|---|---|
08:50 May 18, 2009 | |
| Title | Tsc Hvac Rendered Non-Functional Due to Planned Maintenance |
| Event Description | At 0450 on Monday, May 18, 2009, power was removed to the Peach Bottom Atomic Power Station (PBAPS) Technical Support Center (TSC) ventilation system for planned preventative maintenance activities on the Unit 1 480VAC Load Center 10B014. During the 10B014 bus outage work activities, temporary power will be supplied to maintain all TSC facility equipment functional with the exception of TSC Normal and Emergency Ventilation. The TSC Supply, Exhaust and HEPA Filter fans will be de-energized, rendering the TSC HVAC non-functional while planned maintenance activities are in progress. This maintenance is scheduled to be worked continuously until completion to minimize out of service time. The planned TSC ventilation outage is scheduled to be completed within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />, including a total of 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> to establish and remove the clearances. If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing EP procedures and checklists. It will take no more than 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> to return the Ventilation system back to an operable status, dependent on the stage of the work at the time the emergency occurs. If radiological conditions require TSC facility evacuation during ventilation system restoration, the Station Emergency Director will evacuate and relocate the TSC staff in accordance with, EP-AA-112-200-F-01.
The NRC Resident Inspector has been notified.
This is a follow-up courtesy notification to EN# 45076. All scheduled work to the Unit 1 480VAC Load Center 10B014 is complete, with [the] exception of relay trip testing. Bus restoration has been delayed due to differences between the newly installed transformer and the old transformer, which required changes to the clearance. TSC facility restoration to normal power, including Normal and Emergency Ventilation system operation, is scheduled to occur on 5/20/09 day shift. The [NRC] Resident Inspector has been notified. Notified R1DO (Jackson). |
| Where | |
|---|---|
Peach Bottom  Pennsylvania (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-3.73 h-0.155 days <br />-0.0222 weeks <br />-0.00511 months <br />) | |
| Opened: | Mitchell Saare 05:06 May 18, 2009 |
| NRC Officer: | Howie Crouch |
| Last Updated: | May 20, 2009 |
| 45076 - NRC Website | |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Unit 3 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 565132023-05-09T18:55:0009 May 2023 18:55:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Preparedness Capabilities ENS 563582023-02-06T11:30:0006 February 2023 11:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communications and Assessment Capabilities ENS 549172020-09-28T09:00:00028 September 2020 09:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | ENS 548292020-08-11T17:34:00011 August 2020 17:34:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Technical Support Center Ventilation System ENS 535942018-09-11T04:00:00011 September 2018 04:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation Non-Functional ENS 529092017-08-16T14:39:00016 August 2017 14:39:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Power to Technical Support Center ENS 498642014-03-01T16:25:0001 March 2014 16:25:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Sample Flow for Main Stack Wide Range Radiation Monitor ENS 498102014-02-09T06:00:0009 February 2014 06:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Offsite Communications Capability ENS 494802013-10-29T09:00:00029 October 2013 09:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Main Stack Radiation Monitors Removed from Service ENS 484552012-10-30T04:30:00030 October 2012 04:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Sirens Due to Impacts from Hurricane Sandy ENS 477862012-03-29T08:00:00029 March 2012 08:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation System Outage ENS 475812012-01-09T22:22:0009 January 2012 22:22:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Determined to Be Non-Functional ENS 464932010-12-20T12:00:00020 December 2010 12:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation Maintenance ENS 462692010-09-22T21:53:00022 September 2010 21:53:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Sirens Unavailable Due to Inclement Weather ENS 450762009-05-18T08:50:00018 May 2009 08:50:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Tsc Hvac Rendered Non-Functional Due to Planned Maintenance ENS 446442008-11-07T23:00:0007 November 2008 23:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Loss of Emergency Phone Service ENS 440022008-02-22T10:30:00022 February 2008 10:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Commercial and Emergency Phone Systems ENS 439862008-02-14T11:47:00014 February 2008 11:47:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Tsc Power Outage ENS 419402005-08-23T10:13:00023 August 2005 10:13:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Power to Technical Support Center (Tsc) ENS 418082005-06-28T18:00:00028 June 2005 18:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation Inoperable ENS 401772003-09-19T05:45:00019 September 2003 05:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Power to the Technical Support Center ENS 401712003-09-19T00:00:00019 September 2003 00:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of 27 of 97 Emergency Sirens Due to Storm 2023-05-09T18:55:00 [Table view] | |
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