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16:32 Jun 11, 2019
Normally Closed Primary Containment Isolation Valves Found in the Open Position
At 1132 CDT on 6/11/2019, both manual primary containment isolation valves in a one-inch service air line were found open. This resulted in an open primary containment penetration. Both valves are required to be closed for Primary Containment Isolation Valve Operability. Both valves were closed and independently verified closed at 1149 CDT on 6/11/2019.
There was no impact to the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified.The licensee also notified the State of Minnesota State Duty Officer.
Minnesota (NRC Region 3)
|10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition|
10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
|Time - Person (Reporting Time:+1.38 h0.0575 days <br />0.00821 weeks <br />0.00189 months <br />)|
17:55 Jun 11, 2019
|NRC Officer:||Donald Norwood|
|Last Updated:||Jun 11, 2019|
|54111 - NRC Website|
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