ENS 40255: Difference between revisions

v t e 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.

ENS 40255 +/-
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
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 3: / Line 3: @@
 | facility = Westinghouse Electric Corporation
 | Organization =
-| license number = Snm-1107
+| license number = SNM-1107
 | region = 2
 | state = South Carolina

ENS 40255: Difference between revisions

Latest revision as of 18:43, 24 November 2018

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ENS 40255: Difference between revisions

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