ML20035H174

Forwards SE Re Implementation of Reg Guide 1.97,per Generic Ltr 82-33.Post-accident Monitoring of Accumulator Vol & Pressure Does Not Perform Safety Function & Category 3 Qualification of Instrumentation Acceptable

ML20035H174
Person / Time
Site:	Prairie Island
Issue date:	04/27/1993
From:	Gamberoni M Office of Nuclear Reactor Regulation
To:	Richard Anderson NORTHERN STATES POWER CO.
Shared Package
ML20035H175	List: ML20035H174 ML20035H182
References
RTR-REGGD-01.097, RTR-REGGD-1.097 GL-82-33, TAC-M51122, TAC-M51123, NUDOCS 9305030246
Download: ML20035H174 (4)

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UNITED STATES E

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Docket Nos. 50-282 and 50-306 Mr. Roger 0. Anderson, Director Licensing and Management Issues Northern States Power Company 414 Nicollet Mall Minneapolis, Minnesota 55401

SUBJECT:

PRAIRIE ISLAND NUCLEAR GENERATING PLANT UNITS 1 AND 2 -

INSTRUMENTATION TO FOLLOW THE COURSE OF AN ACCIDENT (REGULATORY GUIDE 1.97 MPA A-17, TAC NOS. M51122 AND M51123)

Section 6.2 of Generic Letter 82-33 requested licensees to provide a report on their implementation of Regulatory Guide 1.97 (Ravision 2), including methods for complying with the Commission's regulations and supporting technical justification for any proposed alternatives or deviations. A large number of exception requests were received from PWR licensees asking that the environmental qualification requirement for accumulator level and pressure monitoring instrumentation be relaxed from Category 2 to Category 3, which would allow commercial grade instruments to be used. Prior to 1987 these requests were denied by the staff. Since then, these exceptions have been considered as an open item until a generic resolution can be found.

The staff has now reviewed the bases for these exceptions and has concluded that no operator action is based on this post-accident instrumentation and that it does not perform a safety function. Since this instrumentation does not perform any post-accident safety function, its qualification requirements can be reduced to Category 3.

A copy of the Safety Evaluation is enclosed.

You have alt'eady installed Category 2 instrumentation to monitor accumulator pressure and Category 3 instrumentation to monitor accumulator level. You are no longer bound by this commitment, and may, at your discretion, replace this instrumentation with Category 3 instrumentation.

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Mr. Ro'ger 0. Anderson April 27, 1993 If you have any questions regarding this issue. please do not hesitate to contact me at (301) 504-3024.

Sincerely, M

b Marsha Gamberoni, Project Manager Project Directorate.111-1 Division of Reactor Projects III-I Office of Nuclear Reactor Regulation

Enclosure:

As stated cc w/ enclosure:

See next page

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.Mr. Roger 0. Anderson April 27, 1993 If you have any questions regarding this issue, please do not hesitate to contact me at (301) 504-3024.

j Sincerely, l

l Original signed by i

Marsha Gamberoni, Project Manager Project Directorate 111-1 1

Division of Reactor Projects 111-1 l

Office of Nuclear Reactor Regulation 2

Enclosure-As stated cc w/ enclosure:

See next page l

DISTRIBUTION:

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COPY ORIGINAL OFFICE COPY G:\\WPDOCS\\ PRAIRIE \\RGl97 E.LTR t

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1-Mr.' Roger 0. Anderson, Director Prairie Island Nuclear Generating Ncrthern States Power Company Plant CC:

J. E. Silberg, Esquire Shaw, Pittman, Potts and Trowbridge 2300 N Street, N. W.

Washington DC 20037 Mr. E. L. Watzl, Site General Manager Prairie Island Nuclear Gener. ting Plant Northern States Power Company Route 2 Welch, Minnesota 55089 Lisa R. Tiegel

- Assistant Attorney General Environmental Protection Division Suite 200 520 Lafayette Road St. Paul, Minnesota 55155 U.S. Nuclear Regulatory Commission Resident Inspector Office 1719 Wakonade Drive East Welch, Minnesota 55089 i

Regional Administrator, Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. Jeff Cole, Auditor / Treasurer Goodhue County Courthouse Red Wing, Minnesota 55066 Kris Sanda, Commissioner i

Director of Public Service 121 Seventh Place East l

Suite 200

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St. Paul, Minnesota 55101-2145 l

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