ENS 40888
ENS Event | |
|---|---|
13:00 Jul 21, 2004 | |
| Title | 4-Hour 91-01 Nrc Bulletin Notification Due to Adu in Non-Favorable Geometry Nitrogen Accumulator Tank |
| Event Description | Facility: Westinghouse Electric Company, Commercial Fuel Fabrication Facility, Columbia SC,
low enriched (less than or equal to 5.0 wt.% U-235) PWR fuel fabricator for commercial light water reactors. License: SNM-1107. Time and Date of Event: July 21, 2004, 0900 Reason for Notification: During a highly unusual upset condition on Conversion line 3, ADU powder backed up in the elevator and hot oil dryer. Subsequently, the ADU backed up into the dryer filter housing, crushing stainless steel filter frames and opening a path via dual flexible lines to a non favorable geometry nitrogen accumulator tank. The tank normally serves as a nitrogen gas accumulator/heater to provide heated nitrogen to pulse/clean the bag filters in the dryer filter housing. No similar event has ever occurred in the history of the facility. In accordance with Westinghouse Operating License (SNM-1107), paragraph 3.7.3 (b.3), this event satisfies the criteria for a 4-hour notification, specifically, any determination that a criticality safety analysis or evaluation was deficient, or that a particular system was not previously analyzed. As Found Condition: 10.5 kg of dry material (primarily ADU) was removed from the nitrogen accumulator tank. Summary of Activity: - The affected line remains shutdown until all equipment is cleaned out. - The nitrogen accumulator tanks on all other Conversion lines have been inspected. No evidence of ADU powder has been found. Conclusions: - This particular tank was not previously analyzed for criticality safety. - There was less than a critical mass of SNM involved. - 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) has determined that this is a safety significant incident in accordance with governing procedures. - A causal analysis will be performed. The licensee will inform the NRC Headquarters Criticality Specialist and the NRC Region 2 Office. |
| Where | |
|---|---|
| Westinghouse Electric Corporation Columbia, South Carolina (NRC Region 2) | |
| License number: | SNM-1107 |
| Reporting | |
| Response | |
| Time - Person (Reporting Time:+0.33 h0.0138 days <br />0.00196 weeks <br />4.52034e-4 months <br />) | |
| Opened: | Michael O. Connelly 13:20 Jul 21, 2004 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Jul 21, 2004 |
| 40888 - 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 | |