ENS 42640
ENS Event | |
|---|---|
16:41 Jun 14, 2006 | |
| Title | Erds Inoperable |
| Event Description | On June 14, 2006, at 0941 PDT, plant operators declared both Units 1 and 2 Emergency Response Data System (ERDS) inoperable due to the failure to complete scheduled surveillance testing. The in-plant emergency response facility data system (ERFDS) and safety parameter display system (SPDS) are operating as expected, but data transfer could not be accomplished via the digital data transfer to the NRC Event Response Center.
Plant personnel are actively investigating the cause of the data transfer failure, and will update this notice upon completion of troubleshooting, repair, and successful performance of the surveillance test. Plant management, emergency personnel, and the NRC Resident Inspector(s) will be informed of the condition, planned maintenance actions, and resolution of this condition.
PG&E restored the ERDS data system to service and satisfactorily completed communication testing with the NRC Incident Response Center." The system was declared operable at 1433 PT. The licensee will notify the NRC Resident Inspector. Notified R4DO (A. Gody)
The following update is provided to clarify the reason for reporting the failure of the Emergency Response Data System (ERDS) on June 14, 2006. On June 14, 2006, at 0941 PDT, plant operators declared both Units 1 and 2 ERDS inoperable when it was discovered during surveillance testing that, although the in-plant emergency response facility data system (ERFDS) and safety parameter display system (SPDS) were operating as expected, the data transfer to the NRC Event Response Center could not be accomplished. This update is to clarify that the ERDS inoperability was discovered during surveillance testing and was not due to a failure to complete scheduled surveillance testing as initially reported. The licensee notified the NRC Resident Inspector. R4DO (Graves) notified. |
| Where | |
|---|---|
Diablo Canyon  California (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+0.82 h0.0342 days <br />0.00488 weeks <br />0.00112 months <br />) | |
| Opened: | Ken Johnston 17:30 Jun 14, 2006 |
| NRC Officer: | Bill Gott |
| Last Updated: | Jun 23, 2006 |
| 42640 - 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 | |