ENS 46593
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ENS Event | |
|---|---|
21:00 Feb 4, 2011 | |
| Title | Loss of Emergency Response Data System Due to Planned Replacement of Plant Process Computer |
| Event Description | The implementation of a planned replacement of the Unit 3 plant process computer, also known as the Critical Function Monitoring System (CFMS), with a new Plant Integrated Computer System (PICS), resulted in the loss of the Emergency Response Data System (ERDS). The Meteorological Radiological Plant Data Acquisition System (MRPDAS), and Meteorological Information and Dose Assessment System (MIDAS) is also impacted. MIDAS will function but the automatic download of Unit 3 plant parameters will not be available and the MIDAS Operator (SM or Dose Assessor) will have to manually input this data to perform dose assessment. Meteorological data will remain available. All Unit 2 functions remain available. Other systems such as the Safety Parameter Display System (SPDS), the Radiological Emergency Communication System (RECS), and the Emergency Notification System (ENS) remain available. As a compensatory measure, a proceduralized backup method is available to FAX applicable data for ERDS and MRPDAS. As discussed in a letter to the NRC data October 6, 2010, the plant process computer is being replaced due to obsolescence. The new Unit 3 computer processors will be located in the Unit 2 Computer Room which will become the Computer Room for both the Unit 2 and Unit 3 Plant Computers. The new Unit 3 plant process computer work stations will be located in the Unit 3 Control Room. The new PICS was previously installed in the Unit 3 plant simulation facility. The modification was initiated on February 4, 2011 and is scheduled to be completed by March 6, 2011. The new PICS will not affect the transmitted data points nor affect the transmission format and computer communication protocol to ERDS. In accordance with the site reporting procedure, a loss of ERDS is reportable as a major loss of emergency assessment capability.
The licensee expects the duration of the ERDS outage to be from one to three weeks. The licensee notified the NRC Resident Inspector. The licensee also notified the following: New York State, Putnam County, Westchester County, Rockland County, and Orange County.
This notification is an update to the information previously provided on February 4, 2011. The replacement of the Unit 3 plant process computer with a new plant integrated computer system (PICS) has been completed. With the return of PICS to service the function of ERDS was also returned to service. A quarterly test with the NRC on April 5, 2011, verified ERDS is functional. The link to PICS for MRPDAS and MIDAS remains unavailable. The previously reported compensatory measure using a proceduralized backup method remains available to FAX applicable data for MRPDAS. Future upgrades will address the PICS data for MRPDAS and MIDAS. The licensee notified the NRC Resident Inspector and will notify the state and local authorities. Notified the R1DO (Henderson). |
| Where | |
|---|---|
Indian Point  New York (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-4.72 h-0.197 days <br />-0.0281 weeks <br />-0.00647 months <br />) | |
| Opened: | Robert Andersen 16:17 Feb 4, 2011 |
| NRC Officer: | Donald Norwood |
| Last Updated: | Apr 11, 2011 |
| 46593 - NRC Website | |
Unit 3 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 485482012-12-01T19:00:0001 December 2012 19:00:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Tsc Ventilation Not Able to Direct Airflow to the Charcoal Filter ENS 479392012-05-21T19:30:00021 May 2012 19:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Tsc Temporarily Out of Service for Planned Maintenance ENS 469612011-06-15T19:30:00015 June 2011 19:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Event Notification System Phone Inoperable ENS 469462011-06-10T15:45:00010 June 2011 15:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Non-Functional Due to Malfunctioning Ventilation System ENS 465932011-02-04T21:00:0004 February 2011 21:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Response Data System Due to Planned Replacement of Plant Process Computer ENS 460922010-07-14T11:20:00014 July 2010 11:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Power Lost to the Emergency Operations Facility ENS 457182010-02-23T06:00:00023 February 2010 06:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Erds Not Availble Due to Plant Computer Malfunction ENS 453542009-09-16T14:36:00016 September 2009 14:36:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Sirens Out of Service ENS 440482008-03-09T00:37:0009 March 2008 00:37:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Power to Off-Site Emergency Sirens ENS 433672007-05-16T20:55:00016 May 2007 20:55:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of 26 Emergency Sirens Due to Severe Weather ENS 428492006-09-19T16:08:00019 September 2006 16:08:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of All Emergency Sirens for Greater than One Hour ENS 427492006-08-02T04:06:0002 August 2006 04:06:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of All Off Site Emergency Notification Sirens ENS 423962006-03-08T15:30:0008 March 2006 15:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Offsite Communications - Sirens in Emergency Planning Zone ENS 422692006-01-18T17:45:00018 January 2006 17:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Response Capability Due to Weather ENS 422662006-01-18T13:48:00018 January 2006 13:48:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Power to Off-Site Emergency Sirens ENS 418512005-07-19T06:00:00019 July 2005 06:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Siren Power ENS 417342005-05-28T17:05:00028 May 2005 17:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Failure of the Plant Integrated Computer System (Pics) ENS 411742004-11-05T12:05:0005 November 2004 12:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergnecy Sirens Found Inoperable Due to Equipment Malfunction ENS 400782003-08-15T14:15:00015 August 2003 14:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Power Lost to Emergency Sirens. 2012-05-21T19:30:00 | |
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