ENS 40888: Difference between revisions

v t e 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.

ENS 40888 +/-
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
v • d • e

v t e Emergency Notification System
Westinghouse Electric Corporation with Response
WEEKMONTHYEAR2005-08-19T19:30:00 [Table view]
[ENS list for Westinghouse Electric Corporation]

@@ Line 16: / Line 16: @@
 | event date = 07/21/2004 09:00 EDT
 | last update date = 07/21/2004
-| title = 4-Hour 91-01 Nrc Bulletin Notification Due To Adu In Non-Favorable Geometry Nitrogen Accumulator Tank
+| title = 4-Hour 91-01 Nrc Bulletin Notification Due to Adu in Non-Favorable Geometry Nitrogen Accumulator Tank
 | event text = 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.

ENS 40888: Difference between revisions

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ENS 40888: Difference between revisions

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