ML053250171

Questions on UHS Amendment

ML053250171
Person / Time
Site:	Hope Creek
Issue date:	11/18/2005
From:	Stewart Bailey Office of Nuclear Reactor Regulation
To:	Duke P Public Service Enterprise Group
References
Download: ML053250171 (2)

Text

Paul Below are the technical staff's questions on the UHS amendment. The technical staff developed these questions during their acceptance review, so they are not a complete set of questions from any of the review groups. Please look these over and lets discuss them. Unless this information has already been provided to the staff, the application will need to be supplemented to allow the staff to perform its review.

The application did not provide an adequate discussion of the changes to allow the NRC staff to perform a detailed technical review. In particular, the application did not address the changes to the Hope Creek licensing basis that was approved in Amendment 120, or the basis for the changes. Please supplement the application with the following information:

1. The application states that the allowable ultimate heat sink (UHS) temperature is increased from 89 to 89.5 degrees F; however, the application provides little information on the basis for the higher temperature limit. Provide a more complete discussion of the basis for the 89.5 degree limit, including the changes since Amendment 120.

2. The application does not address the impact of the UHS temperature change on the safety auxiliaries cooling system (SACS) heat exchanger (HX) outlet temperature limits. Discuss the SACS HX outlet temperatures during normal operation and following a design basis event, what functional capabilities were evaluated for these SACS HX outlet temperatures, and the extend to which the current safety margin is reduced.

3. Describe how instrument uncertainty is (or has been) accounted for when confirming that the measured value does not exceed the proposed TS limit.

Stewart Bailey 301-415-1321 Mail Envelope Properties (437E3ADA.E38 : 2 : 34886)

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Questions on UHS Amendment Creation Date: 11/18/05 3:34PM From: Stewart Bailey Created By: SNB@nrc.gov Recipients pseg.com Paul.Duke (Paul Duke)

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