View source for PNO-III-11-012, A - Perry Unplanned Shutdown Greater than 72 Hours (Update)

{{Adams
| number = ML11292A119
| issue date = 10/19/2011
| title = PNO-III-11-012A - Perry Unplanned Shutdown Greater than 72 Hours (Update)
| author name = Giessner J, Marshfield M
| author affiliation = NRC/RGN-III
| addressee name = 
| addressee affiliation = 
| docket = 05000440
| license number = NPF-058
| contact person = 
| document report number = PNO-III-11-012A
| document type = NRC Preliminary Notification of Event/Occurrence
| page count = 1
}}
{{#Wiki_filter:PRELIMINARY NOTIFICATION - REGION III October 19, 2011 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE - PNO-III-11-012A This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region III staff on this date.
Facility                                           Licensee Emergency Classification Perry Nuclear Power Plant                               Notification of Unusual Event FirstEnergy Nuclear Operating Company                   Alert Perry, Ohio                                             Site Area Emergency Docket: 50-440                                          General Emergency License: NPF-58                                      X Not Applicable

==SUBJECT:==
PERRY UNPLANNED SHUTDOWN GREATER THAN 72 HOURS (UPDATE)
DESCRIPTION:
On October 2, 2011, at 1:00 a.m. (EDT), Perry Nuclear Power Plant began to shut down the reactor (Event Notification 47312) as required by Technical Specification 3.8.1.A.2 due to one of two required off-site power sources being inoperable.
The Unit 1 startup transformer, one of the two required off-site power sources, was declared inoperable at 5:29 a.m. (EDT) on September 29, 2011, due to a suspected internal electrical fault, which also caused a crack in the reservoir that holds oil used to cool the transformer.
This put the plant in a Technical Specification Limiting Condition for Operation (LCO) to restore the startup transformer within 72 hours or shutdown. The other source of off-site power remained available.
On October 17, 2011, the NRC approved an emergency, one-time Technical Specification amendment request to allow the licensee to operate for approximately 60 days with the startup transformer currently out-of-service, while another transformer is modified and installed.
The NRC resident inspectors verified that the compensatory actions specified in the Technical Specification amendment were implemented. Perry was restarted on October 19, 2011.
The NRC resident inspectors monitored plant shutdown and restart, and will continue to monitor licensee compensatory actions and activities as they complete the replacement of the transformer.
The information presented herein has been discussed with the licensee and is current as of October 19, 2011, at 8:30 a.m. (EDT).
ADAMS Accession Number ML11292A119 CONTACTS: Mark Marshfield                               John Giessner 440/259-3610                           630/829-9619 Mark.Marshfield@nrc.gov                John.Giessner@nrc.gov}}

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