ENS 45310

v t e 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.

ENS 45310 +/-
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
v • d • e

v t e Emergency Notification System
Areva Np Inc Richland with 10 CFR 70.50(b)(2)
WEEKMONTHYEAR2013-11-08T18:45:00 [Table view]
[ENS list for Areva Np Inc Richland]

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