Event Notification Report for April 01, 2022
U.S. Nuclear Regulatory Commission
EVENT REPORTS FOR
03/31/2022 - 04/01/2022
Event Number: 55808
Region: 2 State: SC
Unit:   
RX Type:  W-3-LP, W-AP1000, W-AP1000
NRC Notified By: Justin Bouknight
HQ OPS Officer: Brian Lin
Notification Date: 03/30/2022
Notification Time: 09:43 [ET]
Event Date: 06/22/2021
Event Time: 00:00 [EST]
Last Update Date: 03/30/2022
Emergency Class: Non Emergency
10 CFR Section:
21.21(d)(3)(i) - Defects And Noncompliance
Miller, Mark (R2DO)
Part 21/50.55 Reactors, - (EMAIL)
Power Reactor Unit Info
||Initial RX Mode
||Current RX Mode
EN Revision Imported Date: 4/1/2022
EN Revision Text: PART 21 - POPPET SEAL FAILURE
The following information was provided by the licensee via fax or email:
"This is a non-emergency notification required by 10 CFR 21.21(d)(3)(i). A written notification in accordance with 10 CFR 21.21(d)(3)(ii) will be provided within 30 days.
"On June 22, 2021, VC Summer Nuclear Station (VCSNS) received information indicating that a poppet seal failure in the Feedwater Isolation Valve (FWIV) 'B' control block was due to laminations in the Viton material. The failure occurred on May 12, 2021 and was captured in the corrective action program as CR-21-01263.
"VCSNS completed a Substantial Safety Hazard Evaluation and determined that the laminations in VCSNS poppet seal lots 7064051 and 7081558 constituted a substantial safety hazard. The FWIV poppet seals are responsible for retaining and directing pressurized air to each side of the FWIV actuator for repositioning and maintaining FWIV position in both the open and closed positions.
"The NRC Senior Resident Inspector has been notified."
Page Last Reviewed/Updated Friday, April 01, 2022