ML20137A418

Forwards RAI to Complete Review of NSPs 960314 Submittal Requesting Relief from Section XI of ASME BPV Code, Rules for Inservice Exam of NPP Components, 1986 Edition

ML20137A418
Person / Time
Site:	Monticello
Issue date:	03/17/1997
From:	Kim T NRC (Affiliation Not Assigned)
To:	Richard Anderson NORTHERN STATES POWER CO.
References
TAC-M96255, NUDOCS 9703200321
Download: ML20137A418 (3)

Text

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March 17, 1997 Mr. Roger 0 ' Anderson, Director > Distribution Licensing and Management Issues Docket File TMcLellen Northern States Power Company. PUBLIC GBagchi 414 Nicollet Mall .

PD3-1 Rdg. ACRS Minneapolis, MN 55401. JRoe JGrobe, RIII OGC BMcCabe EAdensam(EGA1)

JJacobson, RIII

SUBJECT:

MONTICELLO NUCLEAR GENERATING PLANT - REQUEST FOR ADDITIONAL

-INFORMATION REGARDING THIRD 10-YEAR INTERVAL INSERVICE INSPECTION PROGRAM PLAN ASSOCIATED REQUESTS FOR RELIEF (TAC NO. M96255)

Dear Mr. Anderson:

We have reviewed Northern States Power Company's (NSP's) March 14, 1996, submittal requesting relief.from Section XI of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, " Rules for Inservice Examination.of Nuclear Power Plant Components," 1986 edition, no

addenda. We have also reviewed the subsequent information provided in a submittal dated January 22, 1997. During the review, the staff determined that additional information is needed to complete our review. Enclosed is the request for additional information (RAI). Please provide your response to these questions within 60 days from the date of this letter. In addition, to-expedite the review process, please send a copy of your RAI response to NRC's contractor, INEL, at the following address:

Michael T. Anderson INEL Research Center 2151 North Boulevard.

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PO Bo'x 1625 Idaho Falls, Idaho 83415-2209 If you have any questions, please contact me at (301) 415-1392.

,r L. Sincerely, e 4

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W Tae Kim,= Senior Project Manager Project Directorate 111-1 Division of Reactor Projects III/IV Offi'ce of Nuclear Reactor Regulation Docket No: 50-263f

Enclosure:

As stated'ss cc w/ enc 1: .See next page' ,

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l/L OFFICE PD31:PM l,E PD31:LA t lE PD31:PDy/ l NAME TJKim Y,/A CJamerson ci '/ JHannonV i DATE 3/4 /96 " 3//3 /96 /i 3//q/96 0FFICIAL RECORD COPY v '/

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Mr. Roger 0. Anderson, Director Monticello Nuclear Generating Plant Northern States Power Company

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4 J..E. Silberg, Esquire Adonis A. Nebiett Shaw, Pittman, Potts and Trowbridge Assistant Attorney General

2300 N Street, N. W. Office of the Attorney General Washington DC 20037 445 Minnesota Street Suite 900 U.S. Nuclear Regulatory Commission St. Paul, Minnesota 55101-2127 i Resident Inspector's Office 2807 W. County Road 75

Monticello, Minnesota 55362 Plant Manager Monticello Nuclear Generating Plant

! ATTN: Site Licensing i' Northern States Power Company 2807 West County Road 75

Monticello, Minnesota 55362-9637 Robert Nelson, President Minnesota Environmental Control Citizens Association (i!ECCA) 1051 South McKnight Road St. Paul, Minnesota 55119 Commissioner Minnesota Pollution Control Agency 520 Lafayette Road St. Paul, Minnesota 55119 Regional Administrator, Region III

, U.S. Nuclear Rogulatory Commission 801 Warrenville Road Lisle, Illinois 60532-4351 Commissioner of Health Minnesota Department of Health 717 Delaware Street, S. E.

Minneapolis, Minnesota 55440 Darla Groshens, Auditor / Treasurer Wright County Government Center 10 NW Second Street Buffalo, Minnesota 55313 Kris Sanda, Commissioner Department of Public Service 121 Secenth Place East Suite M0 St. Paul, Minnesota 55101-2145 w m3 l

REQUEST FOR ADDITIONAL INFORMATION MONTICELLO NUCLEAR GENERATING PLANT THIRD 10-YEAR INTERVAL INSERVICE INSPECTION PLAN RELIEF REQUEST NO. 8 - USE OF EXISTING CALIBRATION BLOCKS l

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1. Scone / Status of Review i

The Nuclear Regulatory Commission (NRC) is responsible for the review and disposition of a licensee request relating to inservice inspection-(i requirements contained in the Code of Federal Regulations (CFR) 10 CFR 50.55a, and the American Society of Mechanical Engineers (ASME), i Section XI. Included within a submittal, licensees are required to l provide both a regulatory basis (by citing the appropriate section of a

10 CFR 50.55a), and a technical discussion, to support the request.

l- This information is used to establish the context of each evaluation.

The staff has reviewed the available information submitted by the licensee in a letter dated March 14, 1996, and subsequent information provided in a submittal dated January 22, 1997.  !

i 2. Additional Information Reauired i Based on the current review, the staff has concluded that the following additional information and/or clarification is required to complete the '

evaluation.

1 In Request for Relief No. 8, Northern States Power Company requested authorization to continue utilizing existing calibration blocks that lack the Code required documentation. For similar requests, the NRC has determined that for existing calibration blocks without appropriate documentation, continued use is acceptable provided that the licensee performs a comparison between the attenuation and velocity'of calibration block material and the material being examined. The NRC has found that this conditional requirement is necessary to. verify that the calibration block and material being examined are similar in acoustic properties. If differences in material acoustic properties occur, the licensee can make the appropriate corrections to the ultrasonic scanning sensitivity and angle of ultrasound in the material being examined.

Should the licerisee elect to pursue the subject request for relief, the licensee should submit additional information that incorporates the aforementioned condition. This information will provide the docketed commitment that is necessary in order to authorize the licensee's  ;

alternative. '

The schedule for timely completion of this review requires that the licensee provide, by the requested date, the above requested information and/or clarifications regarding the Monticello ISI Relief Request No. 8 (Rev. 0) Use j of Existing Calibration Blocks. j ENCLOSURE l

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