ML19320C274

Interim Deficiency Rept Re Incorrect Pipe Supplied by Tx Pipe Bending.Heavier Wall Would Not Cause Overstressed Condition.Generic Implications in Other Applications Under Investigation.Final Rept Will Be Submitted by 800829

ML19320C274
Person / Time
Site:	Grand Gulf
Issue date:	05/23/1980
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:
References
AECM-80-108, NUDOCS 8007160585
Download: ML19320C274 (2)

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MISSISSIPPI POWER & Li T COMPANY fb f l u Helping Build Mississippi P. O. B O X 1S 4 0. J A C K S O N. MISSISSIPPI 39205 May 23, 1980 PaoOUCTIQN QCPARTMCNT Office of Inspection & Enforcement U.S. Nuclear Regulatory Commission Region II 101 Marietta St., N.W., Suite 3100 Atlanta, Georgia 30303 Attention: Mr. J. P. O'Reilly, Director

SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416/417 File 0260/15525/15526 PRD-80/22, Status Report, Incorrect Pipe Supplied by Texas Pipe Bending AECM-80/108 On April 24, 1980, Mississippi Power & Light Company notified Mr. M. Hunt of your of fice of a Potentially Reportable Deficiency (PRD) at the Grand Gulf Nuclear Station (GG5S) construction site. The deficiency concerns the apparent failure of Texas Pipe Bending to supply pipe in accordance with design requirements. Pipe supplied for Spool QLG41G015-06 was Schedule 40. The design drawings for the system in question, Fuel Pool Cooling and Cleanup, require the use of Schedule 10 pipe.

It has been determined that the heavier wall of this spool would not cause an overstressed condition on the pipe support system in this particular application. It would, therefore, not affect the safety of the plant. 'doweve r ,

the generic implications of the use of heavier wall pipe bends in other applications is currently under investigation. The investigation is to determine where heavier wall pipe spools are used and to evaluate that i application for its effect on associated pipe support systems.

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01 8007160 686 S Member Middle South Utilities System

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, MISSISSIPPI POWER & LIGHT COMPANY Mr. 'J. P. ' O' Reilly, . Director May 23, 1980 Nuclear Regulatory Commission-

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.ni= expect to provide a final report and determination.of reportability no later than August 29, 1980. This deficiency is also being tracked by Bechtel Management ' Corrective Action Report (MCAR) - CCNS No. 76.

_Yours truly, r.. A

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JN.-

p J. P. McGaughy, Jr.

Assistant Vice President Nuclear Production JGC/JDR:lm

. _cc: Mr. N. L.-Stampley bec: Dr. D. C. Gibbs

-Mr. R. B. McGehee Mr. Adrian Zaccaria Mr. T. B. Conner. Mr. J. N. Hard Mr. D. M. Lake Mr. J. P. McGaughy Mr. Victor-Stello,Jr., Directory Division of Inspection & Enforcement Mr. T. E. Reaves U.S. Nuclear Regulatory Commission Mr. T. H. Cloninger Washington, D. C. 20555 Mr. C. K. McCoy Mr. J. W. Yelverton Mr. A. R. Smith Mr. Tom Houghton Mr. M. D. Hunt File-E

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