ML20057A841

Discusses ASME Code Case N-10 for Replacement SGs at Plants. NRC Staff Concluded That Provisions of Former Code Case N-10 Technically Acceptable

ML20057A841
Person / Time
Site:	Mcguire, Catawba, McGuire
Issue date:	09/10/1993
From:	Matthews D Office of Nuclear Reactor Regulation
To:	Tuckman M DUKE POWER CO.
References
TAC-M86948, NUDOCS 9309160014
Download: ML20057A841 (5)

Text

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UNITED STATES y,k_J j

NUCLEAR REGULATORY COMMISSION

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September 10, 1993 Decket Nos. 50-413, 50-369, and 50-370 t

Mr. M. S. Tuckman Senior Vice President i

Duke Power Company P. O. Box 1006 i

Charlotte, North Carolina 28201-1006

SUBJECT:

ASME CODE CASE N-10 FOR REPLACEMENT STEAM GENERATORS - CATAWBA NUCLEAR STATION, UNIT 1 and McGUIRE NUCLEAR STATION, UNITS 1 AND 2, (TAC N0. M86948)

The NRC staff has reviewed the Duke Power Company's (DPC or licensee) request of July 1,1993, to use ASME Code Case N-10 in the fabrication of the replacement steam generators for McGuire, Units 1 and 2, and Catawba, Unit 1.

Code Case N-10 provided alternative examination requirements with respect to i

the timing of final non-destructive examination (NDE) of ASME Section III, Class 1, welded construction.

Normally, the record radiographic test (RT) is required to be made after the final post weld heat treatment (PWHT) for P-Nos. I and 3 materials. Code Case N-10 allowed the final RT to be made prior to PWHT, provided that an ultrasonic test be performed after PWHT.

This Code case was formerly endorsed by Regulatory Guide 1.85, without restriction.

It was eventually incorporated into the 1986 (and later) Addenda to the 1986 ASME Code. Accordingly, it was annulled as a separate Code case.

It is also incorporated into the 1989 ASME Code.

i The Addenda and the 1989 ASME Code have been incorporated by reference into Title 10 of the Code of Federal Regulations (10 CFR) 50.55a,1993 edition, effective January 1,1993. No restrict'7ns were placed on the corresponding Code subsections incorporating the provisions of the former Code case when the Addenda and the 1989 Code were incorporated by reference into 10 CFR.

The licensee requested relief to use ASME Code Case N-10 because the adopted Code of record for the replacement steam generators is 1986, without Addenda.

The 1986 Code does not incorporate the provisions of Code Case N-10.

The staff has, by prior review as discussed above, concluded that the provisions of former Code Case N-10, incorporated into ASME Section III, 1986 (and later) Addenda, as paragraph NB-5120, are technically acceptable.

However, the staff finds that since Code Case N-10 has been annulled, approval to reference it, as such, is denied.

Instead, the staff is treating DPC's request pursuant to the provisions of 10 CFR 50.55a(a)(3)(1) wherein an equally acceptable alternate examination requirement in the form of ASME Section III, paragraph NB-5120, of the 1986 Addenda has been specified.

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McGuire Nuclear Station Duke Power Company Catawba Nuclear Station l

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Mr. R. C. Futrell North Carolina Electric Membership Regulatory Compliance Manager Corporation Duke Power Company P. O. Box 27306 4800 Concord Road Raleigh, North Carolina 27611 l

York, South Carolina 29745 i

Senior Resident Inspector North Carolina Municipal Power Routt Box 179 N i

Agency Number 1 York Sc.:h Carolina 29745 1427 Meadowwood Boulevard i

P. O. Box 29513 Mr. David L. Rehn i

t Raleigh, North Carolina 27626-0513 Vice President, Catawba Site Duke Power Company County Manager of Ycrk County 4800 Concord Road York County Courthouse York, South Carolian 29745 j

York, South Carolina 29745 Mr. T. C. McMeekin Richard P. Wilson, Esquire Vice President, McGuire Site Assistant Attorney General Duke Power Company South Carolina Attorney General's 12700 Hagers Ferry Road Office Huntersville, North Carolina 28078 i

P. O. Box 11549 Columbia, South Carolina 29211 l

Piedmont Municipal Power Agency 121 Village Drive Greer, South Carolina 29651 Saluda River Electric l

P. O. Box 929 Laurens, South Carolina 29360 l

Max Batavia, Chief Bureau of Radiological Health i

South Carolina Department of

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Health and Environmental Control 2600 Bull Street l

Columbia, South Carolina 29201 1

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t McGuire Nuclear Station Duke Power Company Catawba Nuclear Station i

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Mr. A. V. Carr, Esquire Mr. Dayne H. Brown, Director Duke Power Company Department of Environmental, 422 South Church Street Health and Natural Resources l

Charlotte, North Carolina 28242-Division of Radiation Protection 0001 P. O. Box 27687 Raleigh, North Carolina 27611-7687 1

County Manager of Mecklenberg County 720 East Fourth Street Mr. Alan R. Herdt, Chief i

Charlotte, North Carolina 28202 Project Branch #3 U. S. Nuclear Regulatory Commission Mr. R. O. Sharpe 101 Marietta Street, NW. Suite 2900 l

Compliance Atlanta, Georgia 30323 i

Duke Power Company McGuire Nuclear Site Ms. Karen E. Long 12700 Hagers Ferry Road Assistant Attorney General Huntersville, NC 28078-8985 North Carolina Department of Justice J. Michael McGarry, III, Esquire P. O. Box 629 l

Winston and Strawn Raleigh, North Carolina 27602 1400 L Street, NW.

Washington, DC 20005 Mr. G. A. Copp Licensing - EC050 Senior Resident Inspector Duke Power Company c/o U. S. Nuclear Regulatory P. O. Box 1006 i

Commission Charlotte, North Carolina 28201-i 12700 Hagers Ferry Road 1006 Huntersville, North Carolina 28078 i

Regional Administrator, Region II Mr. T. Richard Puryear U.S. Nuclear Regulatory Commission Nuclear Technical Services Manager 101 Marietta Street, NW. Suite 2900 Westinghouse Electric Corporation Atlanta, Georgia 30323 Carolinas District 2709 Water Ridge Parkway, Suite 430 Charlotte, North Carolina 28217 Dr. John M. Barry Mecklenberg County Department of Environmental Protection 700 N. Tryon Street Charlotte, North Carolina 28202 l

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Mr. M. S. Tuckman September 10, 1993 Accordingly, the staff finds that the proposed alternative provides an acceptable level of quality and safety, and relief is granted under the provisions of 10 CFR 50.55a(a)(3)(i) to proceed with the appropriate technical provisions of ASME Section III, paragraph NB-5120, of the 1986 Addenda in the fabrication of the replacement steam generators for McGuire, Units 1 and 2, and Catawba, Unit 1 Sincerely, 1

ORIGINAL SIGNED BY:

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i David B. Matthews, Director Project Directorate II-3 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation l

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See next page l

DISTRIBUTION:

-Docket File T. Murley/F. Miraglia NRC & Local PDRs J. Partlow i

PDil-3 R/F E. Rossi S. Varga J. Lieberman G. Lainas E. Jordan D. Matthews C. Hill (6) i L. Berry OPA R. Martin OC/LFDCB OGC L. Plisco, EDO ACRS (10)

E. Merschoff, Ril r3

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Accordingly, the staff finds that the proposed alternative provides an i

J acceptable level of quality and safety, and relief is granted under the provisions of 10 CFR 50.55a(a)(3)(i) to proceed with the appropriate technical provisions of ASME Section III, paragraph N8-5120, of the 1986 Addenda in the f abrication of the replacement steam generators for McGuire, Units 1 and 2, and Catawba, Unit 1.

i Sincerely,

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David B. Matthews, Director

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Project Directorate II-3 Division of Reactor Projects - I/II 1

Office of Nuclear Reactor Regulation cc:

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