ML12025A225

Response to Request for Additional Information Regarding the Cycle 21 Core Operating Limits Report

ML12025A225
Person / Time
Site:	Millstone
Issue date:	01/18/2012
From:	Hartz L Dominion, Dominion Nuclear Connecticut
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
TAC ME6365, 11-620A
Download: ML12025A225 (2)

Text

Dominion Nucear Conneetieut, Ie.

5000 Dominion Boulevard, Glen Allen, Virginia 23060 Web Address: www.dom.com January 18, 2012 U. S. Nuclear Regulatory Commission Serial No. 11-620A Attention: Document Control Desk NSSL/WDC RO Washington, DC 20555 Docket No. 50-336 License No. DPR-65 DOMINION NUCLEAR CONNECTICUT, INC.

MILLSTONE POWER STATION UNIT 2 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION REGARDING THE CYCLE 21 CORE OPERATING LIMITS REPORT (TAC NO. ME6365)

Dominion Nuclear Connecticut, Inc. (DNC) submitted the Millstone Power Station Unit 2 (MPS2) Cycle 21 Core Operating Limits Report (COLR) to the Nuclear Regulatory Commission (NRC) in a letter dated May 19, 2011. The COLR includes the values of cycle-specific parameter limits and is submitted to the NRC for information. In a letter dated October 24, 2011, the NRC transmitted a request for additional information (RAI) to DNC related to the MPS2 Cycle 21 COLR. In a letter dated November 30, 2011, DNC responded to the RAIs. In RAI Question 4, the NRC requested a proprietary AREVA engineering calculation which DNC agreed to provide by January 31, 2012.

The proprietary AREVA engineering calculation is provided in Attachment 1. The non-proprietary version of the calculation is provided in Attachment 2. It is respectfully requested that Attachment 1 be withheld from public disclosure in accordance with 10 CFR 2.390. The AREVA application for withholding and affidavit is provided in .

If you have any questions regarding this submittal, please contact Wanda Craft at (804) 273-4687.

Sincerely, L. N. Hartz Vice President - Nuclear ipport Services Attachments:

1. Millstone Unit 2 Cycle 21 Peaking Factor Uncertainty Analysis for ICI Detector Misalignment (Proprietary)

2. Millstone Unit 2 Cycle 21 Peaking Factor Uncertainty Analysis for ICI Detector Misalignment (Non-Proprietary)

3. AREVA Affidavit 7AObI

Serial No. 11-620A Docket No. 50-336 RAI Response for MPS2 Cycle 21 COLR Page 2 of 2 Commitments made in this letter:

1. None cc: U.S. Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, PA 19406-1415 C. J. Sanders Project Manager - Millstone Power Station U.S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Mail Stop 08-B3 Rockville, MD 20852-2738 NRC Senior Resident Inspector Millstone Power Station