ENS 55002

v t e ENS Event
01:18 Nov 17, 2020
Title	Both Trains of Main Control Room Ventilation and Air Conditioning Systems Inoperable
Event Description	At 1918 CST on 11/16/2020, it was discovered both required trains of the Main Control Room Ventilation and Air Conditioning systems were simultaneously inoperable. Due to these inoperabilities, the systems were in a condition that could have prevented the fulfillment of a safety function; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v). Subsequent post-maintenance testing demonstrated that the Division 1 Main Control Room Ventilation system was available at the time of the event and was restored to operable status at 2036 CST on 11/16/2020. There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified.

ENS 55002 +/-
Where
Clinton Illinois (NRC Region 3)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
LER:	05000461/LER-2020-002 Simultaneous Lnoperability of Main Control Room Ventilation Subsystems a and B
Time - Person (Reporting Time:+2.37 h0.0988 days <br />0.0141 weeks <br />0.00325 months <br />)
Opened:	James Forman 03:40 Nov 17, 2020
NRC Officer:	Brian Lin
Last Updated:	Nov 24, 2020
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v • d • e

v t e Emergency Notification System
Clinton with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
WEEKMONTHYEAR2020-11-17T01:18:00 [Table view]
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