ENS 40255
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ENS Event | |
|---|---|
19:30 Oct 16, 2003 | |
| Title | 24 Hour Bulletin 91-01 Notification from Westinghouse Columbia Fuel Facility |
| Event Description | Double Contingency Protection: Double contingency protection for the ADU Bulk Blending System is assured by (1) preventing moderator from becoming available to a bulk container, and (2) preventing moderator from entering a bulk container. The first contingency did not occur because the moderator was never available to a bulk container. Moderator is prevented from entering a bulk container by preventing high moisture polypaks from being dumped into the bulk container. The polypaks are processed through a scan and dump interlock, which prevents unacceptable polypaks from being dumped. The software malfunction left less than previously documented double contingency protection for the system. In accordance with Westinghouse Operating License (SNM-1107), paragraph 3.7.3 (c.5a), this event satisfies the criteria for a 24-hour notification.
As Found Condition: See Reason for Notification above. Summary of Activity: Immediately after all packs were dumped into the bulk container to complete the blend of material, Operations noticed that the packs had not been denoted as "consumed" by the data base, and notified the computer system administrator and Nuclear Criticality Safety. The computer system administrator stopped all dumping operations. The computer system administrator immediately checked all packs that had been dumped into the blend. All moisture values were acceptable. All operations that use the same PLC interface program for criticality controls were stopped. Conclusions: Less than previously documented double contingency protection remained. All moisture values for the material involved were acceptable, and the total amount of moderator in the blend was very low, far less than criticality limits. At no time was the health or safety to any employee or member of the public in jeopardy. No exposure to hazardous material was involved. The Incident Review Committee (IRC) determined that this is a safety significant incident in accordance with governing procedures. A causal analysis will be performed. |
| Where | |
|---|---|
| Westinghouse Electric Corporation Columbia, South Carolina (NRC Region 2) | |
| License number: | Snm-1107 |
| Reporting | |
| Response | |
| Time - Person (Reporting Time:+-1.62 h-0.0675 days <br />-0.00964 weeks <br />-0.00222 months <br />) | |
| Opened: | David Williams 17:53 Oct 16, 2003 |
| NRC Officer: | Rich Laura |
| Last Updated: | Oct 16, 2003 |
| 40255 - NRC Website | |
Westinghouse Electric Corporation with Response | |
WEEKMONTHYEARENS 419332005-08-19T19:30:00019 August 2005 19:30:00
[Table view]Response Nrc Bulletin 91-01 Violation of Criticality Spacing Requirements ENS 417232005-05-20T22:40:00020 May 2005 22:40:00 Response, Part 70 App A (B)(5) Deviation from Integrated Safety Analysis, and a 24 Hour Notification - Bulletin 91-01 Criticality Control ENS 414182005-02-17T17:00:00017 February 2005 17:00:00 Response, Part 70 App A (B)(1) 24 Hour 91-01 Response Bulletin and Part 70 App a Unanalyzed Condition ENS 413722005-02-04T14:00:0004 February 2005 14:00:00 Response 24-Hour Notification-Bulletin 91-01 Criticality Control ENS 409852004-08-24T14:05:00024 August 2004 14:05:00 Response 24 Hour 91-01 Response Bulletin ENS 408882004-07-21T13:00:00021 July 2004 13:00:00 Response 4-Hour 91-01 Nrc Bulletin Notification Due to Adu in Non-Favorable Geometry Nitrogen Accumulator Tank ENS 408552004-07-07T21:00:0007 July 2004 21:00:00 Response Nrc Bulletin 91-01 - 4 Hour Report ENS 407932004-06-04T22:00:0004 June 2004 22:00:00 Response Licensee Reported a 4 Hour 91-01 Response Bulletin ENS 405672004-03-04T20:00:0004 March 2004 20:00:00 Response 24-Hour Notification - Bulletin 91-01 Criticality Control ENS 404402004-01-12T20:45:00012 January 2004 20:45:00 Response 24 Hour Notification Bulletin 91-01 Criticality Control ENS 402552003-10-16T19:30:00016 October 2003 19:30:00 Response 24 Hour Bulletin 91-01 Notification from Westinghouse Columbia Fuel Facility ENS 402462003-10-14T11:30:00014 October 2003 11:30:00 Response 24-Hour Nrc 91-01 Bulletin Report Involving Improper Mass Control ENS 401522003-09-12T14:32:00012 September 2003 14:32:00 Response Improper Scanning of Lead Rods for the Product Engineering Laboratory 2005-08-19T19:30:00 | |
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