ENS 41149
ENS Event | |
|---|---|
21:30 Oct 26, 2004 | |
| Title |
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| Event Description | THIS IS NOT A NEW REPORT.
This event report was originally withheld from public release under the NRC's policy for protecting sensitive unclassified information. The NRC has reevaluated this policy and is now making this event report available to the public with suitable redactions.
FAILURE OF SAFETY SYSTEM CAUSING UNFAVORABLE GEOMETRY The licensee reported a transfer of low concentration HEU solution from favorable to unfavorable geometry was initiated upon sampling data that was not representative of the solution. The solution has been determined to be above the transfer concentration limit. Verification of HEU concentration is an administrative "item relied on for safety" (IROFS) for the accident sequence. The remaining IROFS for the accident sequence is an inline radiation detector that automatically closes redundant block valves. This system performed as designed. The system was placed in a safe shutdown condition and the solution remains in a favorable geometry. Mass is controlled in the unfavorable geometry tank by limiting the volume and concentration of transfers into it. The failed control is administrative sampling and verifying the concentration is below the limit. The licensee states the solution will be reprocessed to lower concentration prior to discharge. The licensee has informed the NRC Resident Inspector.
THIS IS NOT A NEW REPORT. This event report was originally withheld from public release under the NRC's policy for protecting sensitive unclassified information. The NRC has reevaluated this policy and is now making this event report available to the public with suitable redactions. |
| Where | |
|---|---|
| Nuclear Fuel Services Inc. Erwin, Tennessee (NRC Region 2) | |
| License number: | SNM-124 |
| Reporting | |
| Part 70 App A (B)(2) | |
| Time - Person (Reporting Time:+13.12 h0.547 days <br />0.0781 weeks <br />0.018 months <br />) | |
| Opened: | Scott Kirk 10:37 Oct 27, 2004 |
| NRC Officer: | Howie Crouch |
| Last Updated: | May 11, 2008 |
| 41149 - NRC Website | |
Nuclear Fuel Services Inc. with Part 70 App A (B)(2) | |
WEEKMONTHYEARENS 561492022-10-05T19:00:0005 October 2022 19:00:00
[Table view]Part 70 App A (B)(2) Degradation of Safety Items ENS 448872009-03-03T05:00:0003 March 2009 05:00:00 Part 70 App A (B)(2) Degradation of Item Relied on for Safety (Irofs) ENS 447402008-12-23T12:49:00023 December 2008 12:49:00 Part 70 App A (B)(2) Degraded Safety Equipment ENS 445842008-10-21T17:02:00021 October 2008 17:02:00 Part 70 App A (B)(2) Irofs Failure in Area 600 ENS 441042008-03-28T14:00:00028 March 2008 14:00:00 Part 70 App A (B)(2) Filters Not Scanned Properly for Activity Prior to Packaging ENS 415232005-03-24T19:00:00024 March 2005 19:00:00 Part 70 App A (B)(2)
2022-10-05T19:00:00 | |