ENS 41223

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v t e ENS Event
19:25 Nov 23, 2004
Title	Failure of Uf6 Release Detection System Due to Loss of Electrical Power
Event Description	At 1325 [CST] on 11-23-04, the Plant Shift Superintendent (PSS) was notified of a failure of the C-310 High Voltage UF6 Release Detection System. The High Voltage UF6 detection system was disabled due to loss of power. Power was lost when a circuit breaker was tripped to de-energize an auxiliary substation that faulted and caused a fire. This High Voltage UF6 Release System is designed to activate alarms to alert operators in the event of a UF6 release. The PSS declared the system inoperable and TSR LCO 2.3.4.4.A actions were implemented to post a continuous smoke watch in the affected area. The event is reportable as a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> event, as required by 10 CFR 76.120(c)(2)(i); An event in which equipment is disabled or fails to function as designed when the equipment is required by a TSR to prevent releases, prevent exposures to radiation and radioactive materials exceeding specified limits, mitigate the consequences of an accident, or restore this facility to a preestablished safe condition after an accident. The equipment was required by TSR to be available and operable and no redundant equipment was available to perform the required safety function. In addition, the loss of power caused the Low Voltage UF6 Detection System to isolate the C-310 withdrawal positions as designed. The substation fault and subsequent fire did not result in a release of radioactive material. The Senior NRC Resident Inspector has been notified of this event.

ENS 41223 +/-
Where
Paducah Gaseous Diffusion Plant Paducah, Kentucky (NRC Region 2)
License number:	GDP-1
Reporting

10 CFR 76.120(c)(2)
Time - Person (Reporting Time:+18.23 h0.76 days <br />0.109 weeks <br />0.025 months <br />)
Opened:	Calvin Pittman 13:39 Nov 24, 2004
NRC Officer:	Mike Ripley
Last Updated:	Nov 24, 2004
41223 - NRC Website
v • d • e

v t e Emergency Notification System
Paducah Gaseous Diffusion Plant with 10 CFR 76.120(c)(2)
WEEKMONTHYEAR2014-05-08T15:24:00 [Table view]
[ENS list for Paducah Gaseous Diffusion Plant]

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