ML20150C583

Advises That Relief from ASME Code Hydrostatic Test Requirement for Repair Welds Granted,In Response to 880128 Relief Request 88-01.Requirement Impractical to Perform. Record Copy

ML20150C583
Person / Time
Site:	McGuire
Issue date:	03/14/1988
From:	Hood D Office of Nuclear Reactor Regulation
To:	Tucker H DUKE POWER CO.
References
TAC-67032, NUDOCS 8803210100
Download: ML20150C583 (3)

Text

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1. pp* Crog'o UNITED STATES

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NUCLEAR REGULATORY COMMISSMN o

h WASHING TON, D. C, 20555 March 14, IM8 Docket No.

50-369 Fr. H. B. Tucker, Vice President Nuclear Production Department Duke Power Company 42? South Church Street Charlotte, Porth Carolina 28242

SUBJECT:

RELIEF FROM ASME CODE TEST REQUIREMENT FOR THE NUCLEAR SERVICE WATER 1

SYSTEM, MCGUIRE NUCLEAR STATION, UNIT 1 (TAC 67032)

By letter dated January 28, 1988, you submitted Relief Request No. 8R-01 which requested relief from the ASME Boiler and Pressure Vessel Code reouirement for hydrostatic testing of repair welds RN1F 841A, RN 507-? and IPN-EXP48-1 in the Nuclear Service Water Systen at the McGuire Nuclear Station, Unit 1.

You had determined that the test reauirement of Section XI, 1980 Edition, Winter 1980 Addenda, Articles IWA-4000 and IWD-5000, was impractical to perform because the piping containing these welds could not be isobted for pressurization. The pump capacity to pressurize the piping is insufficient to offset the leakage through the butterfly valve used to isolate the welded section.

The Nuclear Service Water System is a 24-in, diameter plain carbon steel line designed to operate at 35 psig pressure and 95 F temperature.

The integrity of the weld repair is assured by performing either a dye penetrant or magnetic particle inspection of both the root and final weld passes.

In addition, a radiographic examination is made on the repair weld involving the base metal. An inservice leak test at system pressure and temperature is performed when the system is placed in service to detect weld defects and through wall leakage.

The staff has evaluated Relief Request No. 88-01. We conclude that the ASME Code requirement is impractical to perform at the McGuire Nuclear Station, Unit 1, and that the alternative tests provide an acceptable level of structural integrity for the Nuclear Service Water Systen. Compliance with the specific i

ASME Code requirement would result in hardship without a compensating increase in the level of quality and safety, g/

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l Mr. H. B. Tucker Accordingly, relief from the hydrostatic test requirement is granted for i

McGuire Unit 1 as requested, pursuant to 10 CFR 50.55a(g)(6)(i).

This relief is authorized by law and will not endanger life or property or the comon defense and security and is otherwise in the public interest given due consideration to the burden upon the licensee that could result if the requirements were imposed on the facility.

Sincerely, Original signed by:

Darl Hood, Acting Director Project Directorate 11-3 Division of Reactor Projects-I/II cc:

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Mr. H. B. Tucker Duke Power Company McGuire Nuclear Station CC:

Mr. A.V. Carr, Esq.

Dr. John M. Barry Duke Power Company Department of Environmental Health P. O. Box 33189 Mecklenburg County 422 South Church Street 1200 Blythe Boulevard Charlotte, North Carolina 28242 Charlotte, North Carolina PPP03 County Manager of Mecklenburg County Mr. Dayne H. Brown, Chief 720 East Fourth Street Radiation Protection Branch Charlotte, North Carolina 28202 Division of Facility Services Department of Human Resources 701 Barbour Drive Mr. Robert Gill Raleich, North Carolina 27603-7008 Duke Power Company Nuclear Production Department P. O. Box 33189 l

Charlotte, North Carolina 2E?42 J. Michael McGarry, III, Esq.

Bishop, Libernan, Cook, Purcell i

and Reynolds 1200 Seventeenth Street, N.W.

Washington, D. C.

20036 Senior Resident Inspector c/o U.S. Nuclear Regulatory Commission Route 4, Box 579 Hunterville, North Carolina 78078 Regional Administrator, Region II V.S. Nuclear Regulatory Commission, 101 Marietta Stre2t, N.W., Suite 7900 Atlanta, Georgia 303?3 S. S. Kilbnrn Area Manager, Mid-South Area j

ESSD Projects 1

Westinghouse Electric Corporation j

MNC West Tower - Bay 239 P. O. Box 355 Pittsburgh, Pennsylvania 15?30 w

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