ML20198N814

Forwards Application for Change to Ts,App a of OLs DPR-42 & DPR-60,respectively,authorization Ltr & Accompanying affidavit.Non-proprietary & Proprietary W Rept Thimble Deletion Study, Encl.Proprietary Encl Withheld

ML20198N814
Person / Time
Site:	Prairie Island
Issue date:	01/15/1998
From:	Sorensen J NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20070L182	List: ML20198N814 ML20198N824 ML20198N830 ML20198N840 ML20198N855
References
NUDOCS 9801210224
Download: ML20198N814 (3)

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Northern States Power Company Prairie Island Nuclear Generating Plant 1717 Wakonade Dr. East Wekh, Minnesota 55089 January 15,1998 10 CFR Part 50 Section 50.90 U S Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 PRAIRIE ISLAND NUCLEAR GENFRATING PLANT Docket Nos. 50-282 License Nos. DPR-42 50 306 DPR-60 License Amendment Request Dated January 15,1998 Moveable incore Detector Thimble Reduction For Unit 1 Cycle 19 Attached is a request for a change to the Technical Specifications, Appendix A of the Operating Licenses, for the Prairie Island Nuclear Generating Plant. This request is submitted in accordance with the provisions of 10 CFR Part 50, Section 50.90.

This License Amendment Request proposes one-time only changes for Prairie Island Unit 1 Cycle 19 that would allow the use of the moveable incore detector system for measurement of the core peaking factors with less than 75% and greater thars cr equal to 50% of the detector thimbles available. This amendment request is being submitted in response to degradation of the Unit 1 moveable incore detector system, which has raised concerns that the number of available detector thimble locations may drop below the 75% requirement of Technical Specification 3.11.A. The proposed changes would allow continued operation of Unit i should the degradation worsen through the remainder of Cycle 19.

Exhibit A contains a description of the proposed changes, the reasons for requesting the changes, the supporting safety evaluations and significant hazards determinations.

Exhibit B contains current Prairie Island Technical Specification pages marked up to show the proposed changes. Exhibit C contains the revised Technical Specification pages. Exhibits D and E contain proprietary and non-proprietary versions of the Westinghouse Thimble Deletion Study for Prairie Island Unit 1 Cycle 19. Exhibit F

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contains the Westinghouse authorization letter, CAW-98-1196 and accompanying y

Affidavit, Proprietary Ir. formation Notice, and Copyright Notice.

,,; C vU U. ATTACHMENT CONTAINS PROPRIETARY INFORMATION TO BE WITHHELD FROM PUBLIC DISCLOSURE IN ACCORDANCE WITH 10 CFR PART 2, SECTION 2.790

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USNRCi NORTHERN STATES POWER COMPANY January 15,1998 Page 2

. As Exhibit D contains information proprietary _ to Westinghouse Electric Company, a -

~ division of CBS Corporation (" Westinghouse"), it is supported _ by an affidavit (Exhibit F).

signed by Westinghouse, the owner of the'information. ~ The Affidavit sets forth the :

basis _on which the information may.be' withheld from public disclosure by the Commission and addresses with specificity the considerations listed in Paragraph _

l

._ (b)(4) of 10 CFR Section 2.790 of the Commission's regulations, a

L Accordingly, it is respectfully requested that the information which is proprietary to -

Westinghouse be withheld from public disclosure in accordance with 10 CFR Part 2, 3

Section 2.790 of the Commission's regulations.

- Correspondence with respect to the copyright or proprietary aspec's of the reports attached as Exhibits D and E, or the supporting Westinghouse Affidavit, should -

t reference CAW-98-1196 and should be addressed to Henry A. Sepp, Manager of.

' Regulatory and Licensing Engineering, Westinghouse Electric Company, P.O. Box

- 355, Pittsburgh, Pennsylvania 15230-0355, Note that although the proposed Technical Specification changes apply only to Unit 1 Cycle 19, and there are no technical changes to the Unit 2 specifications, the Unit 2 Technical Specifications are administratively affected since they are combined by -

Northern States Power into one Technical Specification manual applying to both_ Prairie Island Uniis 1 and 2. Therefore, when approved, the proposed changes should be incorporated into both the Unit 1 and Unit 2 Technical Specifications.

It is requested that review and approval of this license amendment request be expedited in view of the recent history regarding availability of detector thimbles during Unit _1 Cycle _19 and the need for the use of the moveable incore detector system for

-Technical Specification required monitoring / calibration functions in the near future.

Please contact Gene Eckholt (612-388-1121) if you have any questions reiated to this License Amendment Request.

~ Joel P Sorensen

' Plant Manager -

Prairie Island Nuclear Generating Plant DETLARLT. DOC 4

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USNRCL NORTHERN 8TATES POWER COMPANY l

- January 15,1998 Page 3 -

c: Regional Administrator-Ill, NRC NRR Project Manager, NRC -

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Senior Resident inspector, NRC State of Minnesota (w/o proprietary attachment)

Attn: Kris Sanda J E Silberg (w/o proprietary attachment)

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i Attachments:

Affidavit Exhibit A - Evaluation of Proposed Changes to the Technical Specifications.

Exhibit B - Proposed Changes Marked Up on Existing Technical Specification Pages.

Exhibit C - Revised Technical Specification Pages.

Exhibit D - Proprietary version of Pralrie Island Unit 1 Cycle 19 Thimble Deletion Study Exhibit E - Non-proprietary version of Prairie Island Unit 1 Cycle 19 Thimble Deletion Study Exhibit F - Westinghouse authorization letter, CAW-98-1196, accompanying Affidavit, Proprietary Information Notice and Copyright Notice DETLARLT. DOC

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