ENS 46669

v t e ENS Event
14:15 Mar 10, 2011
Title	Malfunctioning Valve Leads to a Loss of Defense in Depth
Event Description	During a performance of temporary operating procedure on a laser optical device, it was identified that one of two valves used to isolate the device failed to operate. The valves are operated as a pair and the valves are redundant to provide defense in depth. One valve shut as expected. The second valve did not shut. The valves are identified as an Item Relied on For Safety (IROFS). The system was not operating and one of the valves operated as designed. No unsafe condition existed. Operability of both valves is required to meet the performance requirements of 10CFR70.61. This event is being reported pursuant to the requirements of 10CFR70 Appendix A(b)(2) within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The affected device will remain shutdown pending further investigation and implementation of associated corrective actions. [This event is of] low safety significance - the discovery did not result in an unsafe condition.

ENS 46669 +/-
Where
Global Nuclear Fuel - Americas Wilmington, North Carolina (NRC Region 2)
License number:	SNM-1097
Reporting

Part 70 App A (B)(2)
Time - Person (Reporting Time:+18 h0.75 days <br />0.107 weeks <br />0.0247 months <br />)
Opened:	Julie Olivier 08:15 Mar 11, 2011
NRC Officer:	Pete Snyder
Last Updated:	Mar 11, 2011
46669 - NRC Website
v • d • e

v t e Emergency Notification System
Global Nuclear Fuel with Part 70 App A (B)(2)
WEEKMONTHYEAR2022-12-02T20:30:00 [Table view]
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