ML20207K891

Advises That Encl Revised Criteria for Determining Justification for Continued Operation When Encountering Major Discrepancies in As-Built Safety-Related Piping Acceptable from Anomaly Discovered to Next Refueling Outage

ML20207K891
Person / Time
Site:	Prairie Island
Issue date:	10/13/1988
From:	Virgilio M Office of Nuclear Reactor Regulation
To:	Miller H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20207K894	List: ML20207K891 ML20207L115
References
TAC-68464, TAC-68465, NUDOCS 8810170068
Download: ML20207K891 (4)

Text

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E 9 0 Klog'o d' .g UNITED STATES i

[ g NUCLEAR REGULATORY COMMISSION 74 nE WASHINGTOP., D. C. 20555

% , ,., , , # october 13, 1988 Dockets Nos. 5' .82 and 50 .,6 MEMORANDUM FOR: Hubert J. Miller, Director Division of Reactor Safety

, Region III FROM:. Martin J. Virgilio Acting Assistant Director for Regioris III and V Division of Reactor Projects - !!!,

IV, V and Special Projects Office of Nuclear Reactor Regulation

SUBJECT:

REQUEST FOR TECHNICAL ASSISTANCE - OPERABILITY CRITERIA FOR PIPING AND PIPE SUPPORT AS-BUILT DISCREPANCIES AT PRAIRIE ISLAND (AITS 021588) (TACS NOS. 68464/68465) l By memorandum dated June 14 1988, you requested NRR's assistance in determining the adequacy of the operability acceptance criteria prepared by Northern Stt,tes Power Company for application to the pipe system and supports at the Prairie Island Nuclear Generating Plant. Specifically, you requested the adequacy of using "Pipe Support and Hanger Criteria" and "Pipe Stress Criteria" shown on pages 2 and 3 of Procedure No. 832642-3 submitted by the licensce's letter dated June 8,1988, for justifying interim operation at Prairie Island. This documerit concerned with the acceptance criteria for justifying continued operation was found unacceptable, t

By letter dated Septerr.ber 26, 1988, the licensee submitted a revised criteria i titled "Criteria for Determining Justification for Continued Operation When Encountering Major Discrepancies in "As-Built" Safety Related Piping" dated September 21 1988, a copy of which is enclosed. The enclosed criteria containmodificationsthatwerenegotiatedwiththelicenseeandNRC's Mr. Shou-Nien Hou of the Mechanical Engineering Branch during the plant site meeting on September 21, 1988. We find this revised criteria, is modified, acceptable for jrtifying continued operation for an interim period from when  ;

the anorraly is discovered until the next refueling outage when the system discrepancies can be corrected.

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Th"is completes our effort on your regpst, and the associated TAC Nos 68464 and 68465 will be closed.

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Martin J. Virgilio Acting Assistant Director for Regions III and V '

Division of Reactor Projects - III, IV, Y and Special Projects Office of Nuclear Reactor Regulation i

Enclosure:

As stated

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, October 13, 1988  !

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This cornpletes our effort on your request, and the associated TAC Nos. 68464  ;

and 68465 will be closed.

Hartin J. Virgilio Acting Assistant Director (

! for Regions III and V Division of Reactor Projects - III, I

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cc w/ enclosure Office of Nuclear Reactor Regulation  ;

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Enclosure:

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l Mr. D. M. Musolf Prairie Island Nuclear Generating

. Northern States Power Company Plant cc:

Gerald Charnoff, Esq.

Shaw, Pittman, Potts and Trowbridge 2300 N Street, N.W.

Washington, DC 20037 Dr. J. W. Fenwn Minnesota Pollution Control Agency 520 Lafayette Road St. Paul, MN 55155 '

Mr. E. L. Watzl, Plant Manager Prairie Island Nuclear Generating Plant Northern States Power Company Route 2 Welch, Minnesota 55089 Jocelyn F. Olson, Esq.

Assistant Attorney General Environmental Protection Division Suite 200 520 Lafayette Road St. Paul, Minnesota 55155 U.S. Nuclear Regulatory Comission Resident Inspector's Office 1719 Wakonade Drive East Welch, Minnesota 55089 Regional Administrator, Region III U.S. Nuclear Regulatory Comission Office of Executive Director for Operations 799 Roosevelt Road Glen Ellyn, Illinois (0137 Mr. William MiIler, Auditor Goodhue County Courthouse Red Wing, '41nnesota 55066 s

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