ML20212F962

Forwards Suppl 11 to LAR Re CWS Emergency Intake Design Bases,Including STS Consultants,Ltd to D Anderson,Nsp,Figures 1,2,3 & 4 & Excerpt from 1972 Shake Manual,Containing Pages 7 & 8 & Figures 3 & 4

ML20212F962
Person / Time
Site:	Prairie Island
Issue date:	10/28/1997
From:	Sorensen J NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20212F965	List: ML20212F962 ML20212F971
References
NUDOCS 9711050183
Download: ML20212F962 (2)

Text

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Northern States Power company 1717 Wakonado Dr. E.

Welch MN 55009 Telephone 612 388-1121 October 28,1997 10 CFR Part 50 Section 50.90 U S Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket Nos. 50 282 License Nos. DPR-42 50 306 DPR 60 Supplement 11 to License Amendment Request Dated January 29,1997 Amendment of Coolina Water System Emeraency intake Deslan Bases This letter is submitted to supplement the subject license amendment request pursuant to discussions with the NRC Staff. Attachments 1 provides answers to three questions raised during a telephone conference with the NRC Staff on September 22,1997. Attachment 1 includes: a cover letter to Mr. Don Anderson, NSP, from Mr. Tony A. Kiefer and Mr. William H. Walton, STS, dated October 21, 1997; four figures; a " white paper" discussion entitled, ' Mathematical Formulation of SHAKE Transfer Function Versus Deconvolution"; an excerpt from the 1972 SHAKE //,

., manual which contains pages 7 and 8 and Figures 3 and 4; and a technical paper //

4# by Carl J. Costantino, et al, entitled, " Seismic Hazard Studies For the High Flux Beam Reactor at Brookhaven National Laboratory".

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A revised Safety Evaluation, Significant Hazards Determination and Environmental Assessment have not been submitted since these evaluations, as presented in the original January 29,1997 submittal and Supplement 5 dated March 11,1997, continue to bound the proposed license amendment as supplemented by this letter.

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. 10/28/97 Pcg3 2 of 2 If you have any questions related to this supplement to the subject liconse amendment request, please contact myself or Dale Vincent at 612 388-1121.

Joel P. Sorensen Plant Manager, Pralrie Island Nuclear Generating Plant Attachments:

Affidavit

1. Letter to Mr. Don Anderson, NSP, from Mr. Tony A. Kiefer and Mr. William H.

Walton, STS, dated October 21,1997 c: Regional Administrator-Ill, NRC NRR Project Manager, NRC Senior Resident inspector, NRC State of Minnesota Attn: Kris Sanda J E Silberg J