ENS 49334
ENS Event | |
|---|---|
20:00 Sep 9, 2013 | |
| Title | Planned Partial Loss of Communications Capability in Technical Support Center |
| Event Description | This is a non-emergency eight hour notification for a planned loss of communications capability at the DCPP Technical Support Center (TSC). This event is reportable in accordance with 10CFR50.72(b)(3)(xiii) because planned maintenance affects the functionality of some TSC communications systems.
Planned maintenance activities on the TSC communications systems begins 09/09/13. The work includes removing phones and normal business use computers from service to support a minor remodel which includes the installation of new furniture and painting in the TSC command room. The communications equipment scope of work is confined to the TSC command room only and there is no expected loss of capability in the engineering, administrative or radiological rooms within the TSC. There is no expected loss of plant display systems (SPDS, ERDS, or ERFDS) in the TSC during this planned maintenance. The work is scheduled to complete by 09/26/2013. If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing emergency planning procedures. A select group of TSC ERO personnel have been pre-designated to respond to their backup TSC location in accordance with applicable site procedures. If a complete relocation of the TSC becomes necessary, the Site Emergency Coordinator will relocate the remaining TSC staff to a backup location in accordance with applicable site procedures. The Emergency Response Organization teams have been notified of the planned maintenance and the possible need to relocate during an emergency. The NRC Resident Inspector has been notified. This planned maintenance poses no threat to the public or station employees.
The planned maintenance on the TSC communications systems is complete. DCPP restored the emergency response communications capability at 1400 PDT on September 19, 2013. The licensee has notified the NRC Resident Inspector. Notified R4DO (Deese). |
| Where | |
|---|---|
Diablo Canyon  California (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-3.92 h-0.163 days <br />-0.0233 weeks <br />-0.00537 months <br />) | |
| Opened: | Jeremey Cobbs 16:05 Sep 9, 2013 |
| NRC Officer: | Donald Norwood |
| Last Updated: | Sep 19, 2013 |
| 49334 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 533612018-04-24T10:57:00024 April 2018 10:57:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Containment Radiation Monitors Inoperable ENS 493342013-09-09T20:00:0009 September 2013 20:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Partial Loss of Communications Capability in Technical Support Center ENS 491732013-07-03T07:00:0003 July 2013 07:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Response Communications Due to a Loss of Ancillary Power ENS 487862013-02-27T00:30:00027 February 2013 00:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Assessment Capability Due to Vital Inverter Maintenance ENS 486002012-12-18T02:04:00018 December 2012 02:04:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Plant Vent Continuous Radiation Monitors Inoperable ENS 483392012-09-25T12:55:00025 September 2012 12:55:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Removed from Service for Maintenance ENS 481712012-08-09T17:00:0009 August 2012 17:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Operations Facility Data Network Maintenance ENS 443052008-06-19T03:15:00019 June 2008 03:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Meteorlogical Mixing Calculations Unavailable ENS 426402006-06-14T16:41:00014 June 2006 16:41:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Erds Inoperable ENS 413022004-12-31T11:15:00031 December 2004 11:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Notification Sirens 2018-04-24T10:57:00 | |