ENS 52511

v t e ENS Event
09:00 Jan 26, 2017
Title	Containment Valves Failed Surveillance Testing
Event Description	On January 25, 2017, at 1800 CST, during planned surveillance testing, the Drywell Vent Line Inboard Isolation valve, CV-4302, was found to exceed its valve leakage limits and was declared inoperable. After completion of repairs to CV-4302, post maintenance testing showed that the Drywell Vent Line Outboard Isolation valve, CV-4303, was exceeding its valve leakage limits, and therefore, was declared inoperable at 0300 CST on January 26, 2017. This resulted in a containment penetration flow path not within purge valve leakage limits and is reportable in accordance with 10 CFR 50.72(b)(3)(v)(C). Repairs were completed on CV-4303 and both containment valves were declared operable at 1007 CST on January 26, 2017. Secondary Containment was operable at all times. The NRC Resident Inspector has been informed.

ENS 52511 +/-
Where
Duane Arnold Iowa (NRC Region 3)
Reporting

10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
LER:	05000331/LER-2017-001
Time - Person (Reporting Time:+2.43 h0.101 days <br />0.0145 weeks <br />0.00333 months <br />)
Opened:	Mark Dickerson 11:26 Jan 26, 2017
NRC Officer:	Steven Vitto
Last Updated:	Jan 26, 2017
52511 - NRC Website
v • d • e

v t e Emergency Notification System
Duane Arnold with 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
WEEKMONTHYEAR2018-07-09T05:00:00 [Table view]
[ENS list for Duane Arnold]

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