ML070510257

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Request Conference Call Re. Extension of Third 10-Year ISI Interval
ML070510257
Person / Time
Site: Palisades Entergy icon.png
Issue date: 02/20/2007
From: Tam P S
NRC/NRR/ADRO/DORL/LPLIII-1
To: Hazelhoff A C, Lahti L A, Salamon G
Nuclear Management Co
References
TAC MD3059
Download: ML070510257 (2)


Text

From: Peter TamTo:Amy C. Hazelhoff; Laurie A. Lahti; Salamon, GaborDate: 02/20/2007 8:45:11 AM

Subject:

Palisades: Request Conference Call re. Extension of Third 10- Year ISIInterval (TAC MD3059)Laurie:

We are reviewing your 9/15/06 relief request to extend the third 10-year ISI interval. The reliefrequest is based on the proposed alternative to the ASME requirements providing an acceptable level of quality and safety. RG 1.174 includes quantitative guidelines that can be used to determine if the change in risk arising from the requested action is sufficiently small to support a determination that the requested action provides an acceptable level of quality and safety. Our reviewer, Steve Dinsmore, has provided the following 2 draft RAI questions: (1) Please provide an estimate of the increase in core damage frequency (CDF) and largeearly release frequency (LERF) associated with extending the reactor vessel weld inspection interval from ten years to ten years plus two operating cycles.(2) Please describe the process used to develop the above estimates, including the processrelied upon to provide confidence that the risk/reliability models correspond with the as built, as-operated plant.Please call me to arrange a conference call to discuss these 2 questions. This e-mail aimssolely to prepare you and others for the requested conference call. It does not formally request for additional information, and it does not convey a formal NRC staff position.

We will discuss with you how to disposition the above 2 draft questions.Peter S. Tam, Senior Project ManagerPlant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulatione-mail: pst@nrc.gov Tel.: 301-415-1451 CC:Chawla, Mahesh; Dinsmore, StephenMail Envelope Properties(45DAFB67.3CB : 12 : 35330)

Subject:

Palisades: Request Conference Call re. Extension of Third 10- Year ISIInterval (TAC MD3059)Creation Date02/20/2007 8:45:11 AMFrom: Peter TamCreated By:PST@nrc.govRecipientsActionDate & Timenmcco.comTransferred02/20/2007 8:45:35

AM AMY.HAZELHOFF (Amy C. Hazelhoff)

Gabor.Salamon (Gabor Salamon)

LAURIE.LAHTI (Laurie A. Lahti)nrc.gov OWGWPO03.HQGWDO01Delivered02/20/2007 8:45:20 AM MLC CC (Mahesh Chawla)

SCD1 CC (Stephen Dinsmore)Opened02/20/2007 8:54:31

AMPost Office DeliveredRoutenmcco.com OWGWPO03.HQGWDO0102/20/2007 8:45:20 AMnrc.govFilesSizeDate & Time MESSAGE243602/20/2007 8:45:11 AMOptions Auto Delete:

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