ENS 44705

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v t e ENS Event
08:19 Dec 8, 2008
Title	Process Gas Leak Detection System Inoperable
Event Description	At 0219 CST, on 12-08-08 the Plant Shift Superintendent (PSS) was notified that the C-333 Unit 6 Cell 5 UF6 Release Detection (PGLD) System would not test fire during routine testing. Operators found that the READY, MANUAL, and POWER lights for this system were properly illuminated. This PGLD System contains detectors that cover only C-333 Unit 6 Cell 5 which was operating above atmospheric pressure. TSR 2.4.4.1 requires that at least the minimum number of detector heads in the cell are operable during steady state operations above atmospheric pressure. With the Unit 6 Cell 5 PGLD system inoperable, none of the required cell heads were operable. This PGLD System was declared inoperable, TSR LCO 2.4.4.1.B.1 was entered and a continuous smoke watch was put in place within one hour. Engineering has determined, by analyzing the failed component, that the system would not have been able to perform its intended safety function when this condition was discovered. This 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 in accordance with 10CFR76.120(c)(2)(i). This is an event in which equipment is disabled or fails to function as designed when: a.) 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 pre-established safe condition after an accident; b.) the equipment is required by a TSR to be available and operable and either should have been operating or should have operated on demand, and c.) no redundant equipment is available and operable to perform the required safety function. The NRC Senior Resident Inspector has been notified of this event. As of the time of the report, the problem has been corrected and the system returned to service.

ENS 44705 +/-
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:+7 h0.292 days <br />0.0417 weeks <br />0.00959 months <br />)
Opened:	Billy Wallace 15:19 Dec 8, 2008
NRC Officer:	Donald Norwood
Last Updated:	Dec 8, 2008
44705 - 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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