ENS 40246
ENS Event | |
|---|---|
11:30 Oct 14, 2003 | |
| Title | 24-Hour Nrc 91-01 Bulletin Report Involving Improper Mass Control |
| Event Description | Improper Filling of Dry Combustible Trash Drum
Facility: Westinghouse Electric Company, Commercial Fuel Fabrication Facility, Columbia SC, low enriched less then or equal 5.0 wt.% U-235) PWR fuel fabricator for commercial light water reactors. License: SNM-1107. Time and Date of Event: October 14, 2003 Reason for Notification: Dry combustible trash was placed into a single 55-gallon drum without proper mass control. Dry combustible trash drums are positioned on scales for filling. An operator removed a single drum from a scale and then filled the drum with dry combustible trash. The filling of drums on scales prevents exceeding the critical mass limit of [DELETED]. The scales actuate a visual alarm at 66 lbs.; and visual and audible alarm at 90 lbs. If the 66 lbs. limit is reached, operators are required to remove trash from a drum. If the 90 lbs. Limit is reached, operators are required to remove trash and write a Redbook. Double Contingency Protection: Double contingency protection for dry combustible trash is assured by preventing [DELETED] of UO2 from becoming available to a single combustible trash drum, and preventing the total weight of a drum from exceeding the [DELETED]. Criticality limit. The removal of the drum from the scale and subsequent filling 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: During a routine checking of drums for spacing (i.e., U-235 gram counts), a second operator noticed that a dry combustible trash drum had a net weight of 95 tbs. The operator recognized that a drum weight of 95 lbs. Exceeded the scale limit of 90 lbs. and generated the required Redbook. The drum indicated an assay value of 5.285 grams of U-235. Summary of Activity: - When the second operator found the drum, it was placed on hold. Both process engineering and EH&S were notified. - The drum contents were examined and no improper material types were found in the drum. It was also determined that the material was not compacted. - The drum was weighed and assayed and found to match the values on the drum label. Conclusions: - Less than previously documented double contingency protection remained. - Less than a critical mass was 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) determined that this is a safety significant incident in accordance with governing procedures. - A causal analysis will be performed. The licensee will inform the Region 2 Office. |
| Where | |
|---|---|
| Westinghouse Electric Corporation Columbia, South Carolina (NRC Region 2) | |
| License number: | Snm-1107 |
| Reporting | |
| Response | |
| Time - Person (Reporting Time:+1.62 h0.0675 days <br />0.00964 weeks <br />0.00222 months <br />) | |
| Opened: | Carl Snyder 13:07 Oct 14, 2003 |
| NRC Officer: | Chauncey Gould |
| Last Updated: | Oct 14, 2003 |
| 40246 - 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 | |