ENS 51820

v t e ENS Event
06:11 Mar 24, 2016
Title	Control Room Ventilation Declared Inoperable
Event Description	At approximately 0211 [EDT], on March 24, 2016, both control room ventilation filtration trains were declared inoperable in accordance with Technical Specification 3.7.10, Condition B, due to a control room boundary door not being fully closed. Following routine security rounds, the door was unable to be fully closed due to the door's locking bolts not retracting back into the door body, causing interference between the door and door frame. Mitigating actions have been implemented that ensure control room envelope (CRE) occupant radiological exposures will not exceed limits, and CRE occupants are protected from chemical and smoke hazards. Repairs to the door are currently in progress. Technical Specification 3.7.10 allows control room boundary doors to be opened intermittently, under administrative control for preplanned activities, provided the doors can be rapidly restored to the design condition. Previous evaluations of the door not being fully closed for a limited time concluded no loss of safety function had existed. This condition had no impact on the health and safety of the public. The NRC Resident Inspector has been notified.

ENS 51820 +/-
Where
Palisades Michigan (NRC Region 3)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Time - Person (Reporting Time:+2.78 h0.116 days <br />0.0165 weeks <br />0.00381 months <br />)
Opened:	Paul Rhodes 08:58 Mar 24, 2016
NRC Officer:	Karl Diederich
Last Updated:	Mar 24, 2016
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v • d • e

v t e Emergency Notification System
Palisades with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
WEEKMONTHYEAR2021-06-16T19:50:00 [Table view]
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