ENS 46370
ENS Event | |
|---|---|
11:59 Oct 28, 2010 | |
| Title | Emergency Response Data System (Erds) Oos |
| Event Description | Beginning at approximately 0800 hours0.00926 days <br />0.222 hours <br />0.00132 weeks <br />3.044e-4 months <br /> EDT on October 28, 2010, Perry Plant personnel will be taking the plant Integrated Computer System (ICS) out of service for planned maintenance. During the time ICS is out of service, the Safety Parameter Display System (SPDS), the Emergency Response Data System (ERDS), and the automatic mode calculation of the Computer Aided Dose Assessment Program (CADAP) will be unavailable. The computer outage is scheduled for six hours.
In the event of an emergency, plant parameter data will be orally transmitted to the facilities through the Status Board Ring Down circuit with back-up [using] the Private Branch Exchange, Off-Premise Exchange, and various redundant intra-facility circuits throughout the emergency facilities. The dose assessment function will be maintained during the out of service time period by manual input of data into CADAP and, if required, by manual calculation. The ability to open and maintain an 'open line' using the Emergency Notification System will not be affected and will be the primary means of transferring plant data to the NRC as a contingency until the ERDS can be returned to service during the period of unavailability. This event is being reported in accordance with 10 CFR 50.72(b)(3)(xiii), as a condition that results in a major loss of offsite communications capability. A follow-up notification will be made when the maintenance activities are completed and the equipment is restored. The NRC Resident Inspector has been notified.
At 1100 EDT, the plant ICS has been returned to service and functioning normally. The NRC Resident Inspector has been informed. Notified R3DO (Skokowski). |
| Where | |
|---|---|
Perry  Ohio (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-4 h-0.167 days <br />-0.0238 weeks <br />-0.00548 months <br />) | |
| Opened: | Glendon Burnham 07:59 Oct 28, 2010 |
| NRC Officer: | Charles Teal |
| Last Updated: | Oct 28, 2010 |
| 46370 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 487082013-01-31T07:10:00031 January 2013 07:10:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Response Data System (Erds) ENS 486102012-12-20T12:51:00020 December 2012 12:51:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System (Erds) Out-Of-Service ENS 484492012-10-28T14:08:00028 October 2012 14:08:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Equipment Failure Affecting Spds and Erds ENS 484152012-10-17T12:00:00017 October 2012 12:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System (Erds) Out of Service ENS 479132012-05-10T15:00:00010 May 2012 15:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System and Emergency Response Data System Out of Service ENS 469742011-06-20T13:45:00020 June 2011 13:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unplanned Power Outages Affect Emergency Response Systems ENS 463702010-10-28T11:59:00028 October 2010 11:59:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System (Erds) Oos ENS 458802010-04-29T12:30:00029 April 2010 12:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Plant Integrated Computer System Outage Due to Scheduled Maintenance ENS 457682010-03-15T12:10:00015 March 2010 12:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Out of Service Due to Computer Failure ENS 455912009-12-25T20:40:00025 December 2009 20:40:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness ENS 449892009-04-14T11:43:00014 April 2009 11:43:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System and Erds Out of Service ENS 449452009-03-30T22:43:00030 March 2009 22:43:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System (Erds) Out of Service ENS 449052009-03-13T04:25:00013 March 2009 04:25:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Partial Loss of Plant Computer for Scheduled Maintenance Taking Erds Oos ENS 448812009-02-27T10:00:00027 February 2009 10:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System (Erds) Out of Service ENS 448432009-02-10T13:10:00010 February 2009 13:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Plant Computer Oos for Scheduled Maintenance Taking Erds Oos ENS 446222008-11-02T13:30:0002 November 2008 13:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System (Erds) Out of Service for Planned Maintenance ENS 446132008-10-30T04:20:00030 October 2008 04:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System (Erds) Out of Service ENS 444402008-08-26T12:14:00026 August 2008 12:14:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Erds and Spds Out of Service Due to Plant Computer Maintenance ENS 442792008-06-10T06:00:00010 June 2008 06:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Will Be Taken Out of Service 2013-01-31T07:10:00 | |