ENS 56175

v t e ENS Event
08:05 Oct 23, 2022
Title	Stage Four Automatic Depressurization System (ADS) Inoperable
Event Description	The following information was provided by the licensee via email: At 0405 EDT on 10/23/2022, with [Vogtle] Unit 3 in Mode 6 and the reactor subcritical for greater than 28 hours3.240741e-4 days <br />0.00778 hours <br />4.62963e-5 weeks <br />1.0654e-5 months <br />, it was discovered that all three required flow paths for the stage four ADS were simultaneously inoperable; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v). The diverse actuation system was operable for manual stage four ADS during this time period. At 0432 EDT on 10/23/2022, two of the three required flow paths were restored to operable status, which exited the reportable condition. All required flow paths were operable at 0447 EDT. There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified.

ENS 56175 +/-
Where
Vogtle Georgia (NRC Region 2)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Time - Person (Reporting Time:+3.15 h0.131 days <br />0.0187 weeks <br />0.00431 months <br />)
Opened:	Greg Crosby 11:14 Oct 23, 2022
NRC Officer:	Ernest West
Last Updated:	Oct 23, 2022
56175 - NRC Website
v • d • e

v t e Emergency Notification System
Vogtle with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
WEEKMONTHYEAR2022-10-23T08:05:00 [Table view]
[ENS list for Vogtle]

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