ENS Event | |
|---|---|
13:15 Aug 29, 2009 | |
| Title | Nuclear Criticality Detection System Inoperable |
| Event Description | On 08/29/2009 at 0615 PDT, during a scheduled testing of the Nuclear Criticality Detection [NCD] System, it was discovered that in one of the nine locations, two of three NCD units were non-functional. The two NCD units were non-functional apparently due to miswiring. This is still under investigation.
All movement of SNM [Special Nuclear Material] on site was suspended during the testing of the Nuclear Criticality Detection System. This occurrence is reportable to the NRC in accordance with 10CFR70.50.b(2)(i). This is a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> reporting requirement with a follow up 30 day written report. Safety Significance of Event: The safety significance is very low. Accidental nuclear criticality is highly unlikely. Only two of three NCD units in one of nine locations through out the plant were nonfunctional. The one deficient unit had one functional NCD that would have produced a trouble alarm if actuated. The remaining eight Criticality Detector systems were fully functional and covered the areas where SNM is processed. The licensee will be notifying their NRC Region II Inspector. |
| Where | |
|---|---|
| Areva Np Inc Richland Richland, Washington (NRC Region 2) | |
| License number: | SNM-1227 |
| Reporting | |
| 10 CFR 70.50(b)(2) | |
| Time - Person (Reporting Time:+3.4 h0.142 days <br />0.0202 weeks <br />0.00466 months <br />) | |
| Opened: | Konrad Kulesza 16:39 Aug 29, 2009 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Aug 29, 2009 |
| 45310 - NRC Website | |
Areva Np Inc Richland with 10 CFR 70.50(b)(2) | |
WEEKMONTHYEARENS 495242013-11-08T18:45:0008 November 2013 18:45:00
[Table view]10 CFR 70.50(b)(2) Apparent Deterioration of Primary and Secondary Hepa Filters ENS 454072009-10-02T20:30:0002 October 2009 20:30:00 10 CFR 70.50(b)(2) 24 Hour Report on Process Exhaust Hepa Filter Damage ENS 454022009-10-01T02:10:0001 October 2009 02:10:00 10 CFR 70.50(b)(2) 24 Hour Report on Process Exhaust Hepa Filter Deterioraton ENS 453102009-08-29T13:15:00029 August 2009 13:15:00 10 CFR 70.50(b)(2) Nuclear Criticality Detection System Inoperable 2013-11-08T18:45:00 | |