ENS 52563

v t e ENS Event
19:14 Feb 17, 2017
Title	Secondary Containment Inoperable
Event Description	On 2/17/2017 at 1414 EST, secondary containment was declared inoperable due to the discovery of an 18-inch open pipe penetration in the secondary containment boundary. During walkdown activities, it was discovered that a blind flange installed to support removal of a Unit 2 secondary containment isolation valve had been installed on the wrong flange to provide isolation for secondary containment. At 1503 EST, the blind flange was moved to the correct side of the flange and secondary containment was declared operable. This event is reportable per 10 CFR 50.72(b)(3)(v)(C) as a condition that at the time of discovery could have prevented the fulfillment of the safety function of a system needed to control the release of radioactive material. In conjunction with operation of the Standby Gas Treatment (SGT) subsystems, secondary containment is designed to reduce the activity level of the fission products prior to release to the environment and to isolate and contain fission products that are released during certain operations. Therefore, the lack of a qualified isolation device to limit the release of radioactive material constitutes a loss of safety function due to a loss of secondary containment integrity. CR 10332592 The NRC Resident has been notified.

ENS 52563 +/-
Where
Hatch Georgia (NRC Region 2)
Reporting

10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Time - Person (Reporting Time:+-1.47 h-0.0613 days <br />-0.00875 weeks <br />-0.00201 months <br />)
Opened:	Paul Underwood 17:46 Feb 17, 2017
NRC Officer:	Steve Sandin
Last Updated:	Feb 17, 2017
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v • d • e

v t e Emergency Notification System
Hatch with 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
WEEKMONTHYEAR2017-02-17T19:14:00 [Table view]
[ENS list for Hatch]

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