Nuclear Event | Reactor Pressure Vessel [RPV] pressure boundary leakage – Degraded Condition: Susquehanna Nuclear Power Plant, Pennsylvania
Technological Hazard – Nuclear Event: Reactor Shutdown
Nuclear Event in USA on Wednesday, 08 June, 2016 at 02:26 [EDT].
DISCOVERY OF UNISOLABLE REACTOR PRESSURE BOUNDARY LEAKAGE
“Susquehanna Unit 1 identified RPV [reactor pressure vessel] pressure boundary leakage from [local power range monitor] LPRM 24-09 housing above the flange during an under vessel leak inspection on 06/08/2016 at 0226 EDT. The leakage point is a through wall indication on the ASME Class 1 LPRM stub tube. The leakage is not isolable from the reactor vessel. The reactor was in Mode 4 at the time of discovery.
“This event is being reported as a degraded condition pursuant to 10CFR50.72(b)(3)(ii)(A).”
A repair plan is being formulated.
The licensee has notified the NRC Resident Inspector.
Source: NRC Event Number: 51987
Nuclear Event in USA on Monday, 06 June, 2016 at 05:56 [EDT]. ISOLABLE LEAKAGE IDENTIFIED FROM SEAL WATER LINE WELD INSIDE RCS PRESSURE BOUNDARY