Beaver Valley - REACTOR COOLANT SYSTEM (RCS) PRESSURE BOUNDARY DEGRADED

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
4/24/2020 - 4/27/2020

54680

Power Reactor	Event Number: 54680
Facility: BEAVER VALLEY Region: 1     State: PA Unit: [] [2] [] RX Type: [1] W-3-LP,[2] W-3-LP NRC Notified By: JUSTIN E. CROCKER HQ OPS Officer: HOWIE CROUCH	Notification Date: 04/24/2020 Notification Time: 07:00 [ET] Event Date: 04/24/2020 Event Time: 01:30 [EDT] Last Update Date: 04/24/2020
Emergency Class: NON EMERGENCY 10 CFR Section: 50.72(b)(3)(ii)(A) - DEGRADED CONDITION	Person (Organization): FRANK ARNER (R1DO)

Unit

SCRAM     Code

RX   Crit

Initial      PWR

Initial RX      Mode

Current.       PWR

Current RX Mode

2

N

N

0

Refueling

0

Refueling

Event Text

REACTOR COOLANT SYSTEM (RCS) PRESSURE BOUNDARY DEGRADED "At 0130 [EDT] on April 24, 2020, during the Beaver Valley Power Station, Unit 2 refueling outage, while performing examinations of the 66 reactor vessel head penetrations, it was determined that one penetration could not be dispositioned as acceptable per ASME Code Section XI. Penetration 37 will require repair prior to returning the vessel head to service. The indication was not through wall and there was no evidence of leakage based on inspections performed on the top of the reactor vessel head. The examinations were being performed to meet the requirements of 10 CFR 50.55a(g)(6)(ii)(D) and ASME Code Case N-729-4 to find potential flaws/indications before they grow to a size that could potentially jeopardize the structural integrity of the reactor vessel head pressure boundary. This event is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(ii)(A). "There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."

	Edwin Lyman ⁦‪@NucSafetyUCS‬⁩ The ⁦‪@NRCgov‬⁩ reports that inspection of the Beaver Valley Unit 2 #nuclear reactor vessel head during the current outage found a flaw in one of penetrations that must be repaired before the unit can be restarted. I'm glad this inspection was not deferred due to #COVID19. pic.twitter.com/MSxkaz8Ndv 4/27/20, 9:02 AM
Link to tweet