ML20135F739

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Forwards Suppl 3 to 970129 License Amend Request Re Cooling Water Sys Emergency Intake Design Bases
ML20135F739
Person / Time
Site: Prairie Island  Xcel Energy icon.png
Issue date: 03/07/1997
From: Sorensen J
NORTHERN STATES POWER CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20135F742 List:
References
NUDOCS 9703130392
Download: ML20135F739 (2)


Text

Northern states Power Company 5

1717 Wakonade Dr. E.

Welch, MN 55089 Telephone 612-388-1121 March 7,1997 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 3 to License Amendment Request Dated January 29,1997 Amendment of Coolina Water System Emeraency Intake Desian Bases This letter is submitted to supplement the subject license amendment request pursuant to discussions with the NRC Staff in meetings on February 24,1997 and in partial response to Question 3 in NRCs Request for Additional Information dated February 21,1997. Attachment 1 contains the Prairie Island site seismic time histories for use in the dynamic finite element analysis requested in Question 3.

Complete response to Question 3 of the Request for Additional Information dated February 21,1997 requires performance of two-dimensional dynamic finite element f j

analyses of the Prairie Island intake canal banks. An important input into these analyses is the Prairie Island site seismic time histories. Attached for NRC information is the Prairie Island seismic time histories which have been generated for use in the two-dimensional dynamic finite element analysis of the intake canal lII;/

banks. If the NRC has any concerns with the attached information, please let us know as soon as possible.

A revised Safety Evaluation, Significant Hazards Determination and Environmental Assessment have not been submitted since these evaluations, as originally 130072 9703130392 970307 2 lgg{ggglllllllgllll$

DR ADOCK 0500

USNRC

.' March 7,1997 Paga 2 of 2 presented in the January 29,1997 submittal, continue to bound the proposed i license amendment as supplemented. '

If you have any questions related to this supplement to the subject license amendment request, please contact myself or Dale Vincent at 612-388-6758.

f Joel P. Sorensen Plant Manager, Prairie Island Nuclear Generating Plant Attachment 1: Generation of Artificial Time Histories for Use in the 2-D Finite Element Dynamic Seismic Analysis of Prairie Island Seismic Intake Canal Slopes  ;

l c: Regional Administrator-Ill, NRC NRR Project Manager, NRC Senior Resident inspector, NRC State of Minnesota Attn: Kris Sanda i J E Silberg l

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