ENS 45048

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v t e ENS Event
12:17 May 8, 2009
Title	Primary Containment Isolation Valves Discovered Open
Event Description	At 0817, 4 of the 5 ball valves associated with the Traversing Incore Probe (TIP) system were discovered to be open. In conjunction with explosive shear valves located on each line, these ball valves function to isolate the primary containment upon the receipt of a containment isolation signal. Further investigation revealed that the associated TIP detectors were in the drywell at the indexer. With the TIP detectors in the drywell the detector cable is passing through the ball valves and this condition renders the valves inoperable. This condition had existed for approximately 48hrs and was due to improper shutdown of the system on May 5, 2009. This is a violation of technical specification 3.6.3 and resulted in a condition which would have prevented the automatic safety function of the TIP system to control the release of radioactive material during an accident. The explosive shear valves are manually actuated per Operations abnormal procedures should a ball valve not close during accident conditions and remained operable throughout the time the ball valves were impaired. At 0937 the TIP detectors were withdrawn to their chamber shields, the ball valves closed and declared operable. This event was limited to the TIP system and its associated containment penetrations. Plant operation was not affected. Investigation is in progress and will be entered into the station's corrective action program. There was nothing unusual or not understood. All safety related equipment and systems are operable. The licensee notified the NRC Resident Inspector. Notified the R1DO(Caruso).

ENS 45048 +/-
Where
Hope Creek New Jersey (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
LER:	05000354/LER-2009-003
Time - Person (Reporting Time:+3.15 h0.131 days <br />0.0187 weeks <br />0.00431 months <br />)
Opened:	Tom Fowler 15:26 May 8, 2009
NRC Officer:	Vince Klco
Last Updated:	May 8, 2009
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v • d • e

v t e Emergency Notification System
Hope Creek with 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
WEEKMONTHYEAR2015-07-28T17:58:00 [Table view]
[ENS list for Hope Creek]

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