ENS 41477
ENS Event | |
|---|---|
08:00 Mar 9, 2005 | |
| Title | Planned Loss of the Emergency Response Data System |
| Event Description | The following information was obtained from the licensee via e-mail (licensee text in quotes):
On Thursday, March 10, 2005 San Onofre Nuclear Generating Station, Unit 2, will remove a portion of the Safety Parameter Display System (SPDS) and the Emergency Response Data System (ERDS) from service for a planned upgrade to ensure long-term reliability and improve the human-machine interface. This work is expected to complete within seven days. The SPDS emergency assessment function at San Onofre is implemented by a combination of the Qualified Safety Parameter Display System (QSPDS) and the Critical Function Monitoring System (CFMS). The QSPDS portion, which provides emergency assessment capability to plant operators in the control room, will remain functional. The CFMS portion, which receives input from the QSPDS, implements the ERDS and communicates data to the Technical Support Center and Emergency Offsite Facility. Only the CFMS and ERDS are impacted by this upgrade. This planned CFMS outage is being reported in accordance with 10CFR50.72(b)(3)(xiii) as a courtesy notification even though only a portion of the SPDS will be removed from service and preplanned compensatory measures will be in place for the duration of the work. At the time of this report, Unit 2 and Unit 3 were operating at about 79 percent and 99 percent power, respectively. The NRC Resident Inspectors will be notified of this occurrence and will be provided with a copy of this report. Should an emergency event occur, the licensee intends to transmit emergency response data to the NRC via facsimile and voice via the emergency notification system. No electronic data will be sent to the NRC Operations Center for the outage duration.
The CFMS upgrade work was completed on March 17, 2005 at 2310 PST. The SPDS and ERDS have been returned to service. The licensee has notified the NRC Resident Inspector. Notified R4DO (Farnholtz). |
| Where | |
|---|---|
San Onofre  California (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+12.6 h0.525 days <br />0.075 weeks <br />0.0173 months <br />) | |
| Opened: | Mike Mcbrearty 20:36 Mar 9, 2005 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Mar 18, 2005 |
| 41477 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 475502011-12-23T13:00:00023 December 2011 13:00:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Out of Service ENS 467112011-03-30T14:00:00030 March 2011 14:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Sirens Out of Service Due to Inadvertent Securing of Power ENS 465032010-12-22T03:32:00022 December 2010 03:32:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Access to Primary Emergency Operations Facility Not Possible Due to Road Flooding ENS 457142010-02-21T16:00:00021 February 2010 16:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Power Outage at Primary Emergency Operations Facility (Eof) ENS 456342010-01-19T03:50:00019 January 2010 03:50:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Operations Facility Inaccessible Due to Road Flooding ENS 454622009-10-23T19:05:00023 October 2009 19:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Preparedness Capabilities ENS 452052009-07-13T18:00:00013 July 2009 18:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Temporary Loss of Power to Ten Emergency Notification Sirens ENS 443552008-07-18T15:00:00018 July 2008 15:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Operations Facility Inoperable for Maintenance Work ENS 442512008-05-30T22:05:00030 May 2008 22:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Power Outage at Primary Emergency Operations Facility (Eof) ENS 438372007-12-11T19:05:00011 December 2007 19:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Major Loss of Communications Capability ENS 419582005-08-29T17:45:00029 August 2005 17:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System and Emergency Response Data System Planned Upgrade Outage ENS 414772005-03-09T08:00:0009 March 2005 08:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Loss of the Emergency Response Data System ENS 413202005-01-10T03:45:00010 January 2005 03:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness San Onofre Emergency Operations (Eof) Inaccessible Due to Road Flooding 2011-03-30T14:00:00 | |