ML13246A368

Email from S. Pannier, NRR to J. Robles, NRR Wolf Creek AIT

ML13246A368
Person / Time
Site:	Wolf Creek
Issue date:	01/31/2012
From:	Pannier S J Office of Nuclear Reactor Regulation
To:	Robles J E Office of Nuclear Reactor Regulation
References
FOIA/PA-2013-0273
Download: ML13246A368 (1)

Text

Robles, JesseFrom: Pannier, StephenSent: Tuesday, January 31, 2012 6:54 AMTo: Robles, Jesse

Subject:

RE: Wolf Creek AITThanks a lotSteveFrom: Robles, JesseSent: Tuesday, January 31, 2012 6:46 AMTo: Pannier, Stephen

Subject:

Wolf Creek AITSteve,Here is an update on the Wolf Creek AIT, for the ET Brief.The AlT had the entrance at 3pm CST yesterday, and the licensee presented their //T progress.

They have concluded that the initial breaker fault was foreign material in the breaker internals frommanufacturing (based on the vendor's review of the faulted breaker).

They still do not know why the SUT tripped, but they've ruled out a number of options, but they did identify oneof the 13.8kV Switchgear line-side Potential Transformers indicated a short when first tested (although subsequent confirmatory tests did not show the fault; they are still reviewing that one as a possible intermittent fault as a possible cause).Their //T is chartered to review all the equipment issues we have in our charter and also the aggregate impactof the LOOP on the station.The AlT will be having team meetings at 4pm each day and a briefing with RIV management at 11 each day(however, the RIV brief will be at 3pm tomorrow (Tuesday)).

Jesse E. RoblesU.S. Nuclear Regulatory Commission Reactor Systems EngineerNRR/DIRS/IOEB 301-415-2940 301-415-3061 (fax)Jesse.Roblesýf)nrc.gov I