10 février 2018
Alors que la porte extérieure de confinement du niveau 63 m était hors d’état de fonctionnement suite à une maintenance programmée, la porte intérieure du personnel du même niveau était inopérable suite à un test d’étanchéité. Ce test a été déclaré satisfaisant alors que l’analyse des résultats montre le contraire... La déclaration est faite suite à l’insiponibilté de deux sas de confinement.
Type : BWR Mark3 - Puissance : 3 898 MWth - Première divergence : 08 1982 -
Available in english only
Event Number : 53201 Facility : GRAND GULF Region : 4 State : MS Unit : [1] [ ] [ ] RX Type : [1] GE-6 NRC Notified By : BRANDON STARNES HQ OPS Officer : DONALD NORWOOD Notification Date : 02/10/2018 Notification Time : 22:37 [ET] Event Date : 02/10/2018 Event Time : 18:35 [CST] Last Update Date : 02/10/2018 Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL Person (Organization) : HEATHER GEPFORD (R4DO)
Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode 1 N Y 68 Power Operation 70 Power Operation
Event Text BOTH INNER AND OUTER CONTAINMENT AIRLOCK DOORS INOPERABLE AT THE SAME TIME
"On 2/10/18 at 1835 CST at Grand Gulf Nuclear Station, while the 208 ft. Containment Airlock Outer Door was tagged-out for planned maintenance, the 208 ft. Containment Inner Door was determined to be inoperable. Grand Gulf had performed 06-ME-1M23-R-0001, Personnel Airlock Door Seal Air System Leak Test, on the 208 ft. Containment Airlock Inner Door which had been deemed satisfactory. While performing planned maintenance on the outer door an additional review of the paperwork determined that the test was actually unsatisfactory on the inner door. TS 3.6.1.2 Condition C was entered at 1835 CST on 2/10/18 for both 208 ft. Containment Airlock Doors being inoperable. Maintenance of the Outer Door is expected to be completed, and the airlock returned to operable status, prior to TS required action completion time."
The licensee notified the NRC Resident Inspector.
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2018/20180212en.html