ENS Event | |
|---|---|
21:12 Dec 13, 2004 | |
| Title | Criticality Monitoring Dosimeters Not Configured Correctly |
| Event Description | On December 13, 2004, in preparations for new fuel receipt inspection activities, it was determined that the Electronic Dosimeters (Eds) that were previously used to meet criticality monitoring requirements of 10 CFR 70.24, were not configured correctly. Specifically, the dose rate alarm function of the Eds had been disabled. It is unknown at this time if the Eds had previously been used in this in-correct configuration during two previous new fuel receipt inspection activities. Based on the potential that the requirements of part 70.24 were not met, this event is being reported pursuant of part 70.50(b)(2), 'An event in which equipment is disabled or fails to function as designed.'
The Electronic Dosimeters were immediately re-configured correctly and new fuel receipt inspection activities will recommence. The licensee notified the NRC Resident Inspector.
The licensee performed an analysis that concluded that a monitoring system capable of detecting a criticality per 10 CFR 70.24 (a)(2) was in place during new fuel receipt. Specifically, the analysis demonstrated that the electronic dosimeters worn by the radiological workers involved adequately monitored for a criticality event." Therefore the licensee retracts the above event notification. R3DO (Sonia Burgess) & NMSS (Linda Gersey) notified. The NRC Resident Inspector was notified of this retraction by the licensee. |
| Where | |
|---|---|
Duane Arnold  Iowa (NRC Region 3) | |
| Reporting | |
| 10 CFR 70.50(b)(2) | |
| Time - Person (Reporting Time:+17.72 h0.738 days <br />0.105 weeks <br />0.0243 months <br />) | |
| Opened: | Bob Urrell 14:55 Dec 14, 2004 |
| NRC Officer: | Mike Ripley |
| Last Updated: | Jan 5, 2005 |
| 41258 - NRC Website
Loading map... | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (94 %) |
| After | Power Operation (94 %) |
WEEKMONTHYEARENS 412582004-12-13T21:12:00013 December 2004 21:12:00
[Table view]10 CFR 70.50(b)(2) Criticality Monitoring Dosimeters Not Configured Correctly 2004-12-13T21:12:00 | |