ML20052E930

Interim Deficiency Rept Re Transamerica Delaval Standby Diesel Generator ASME Section Iii,Class 3 Piping,Originally Reported on 820329.Insp of Piping Will Be Completed by 820901 & All Welds Repaired.Final Rept by 821001

ML20052E930
Person / Time
Site:	Perry
Issue date:	04/20/1982
From:	Davidson D CLEVELAND ELECTRIC ILLUMINATING CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8205110548
Download: ML20052E930 (2)

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1 THE CLEVELAND ELECTRIC ILLUMIN ATING COMPANY P.O Box 5000 e CLEVELAND. OHIO 44101 e TELEPHONE (216) 622-9800 e ILLUMINATING BLDG e 55 PUBLIC SOUARE "9 "'" # # "

Dalwyn R. Davidson VICE PRESIDENT -

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.N f $ s Mr. James G. Keppler J  ;...,'.fg '-S ,

Director, Region III "* t :. 7 + s .N Office of Inspection and Enforcement hb N N

U. S. Nuclear Regulatory Commission 799 Roosevelt Road ,

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Glen Ellyn, Illinois 60137 O RE: Perry Nuc1 car Power Plant Docket Nos. 50-440; 50-441, Interim Report on Standby Diesel Generator ASME Code Piping Welds (RDC 52(82))

Dear Mr. Keppler:

This letter will serve as the Interim Report as required by 10CFR50.55(e) on the potential significant deficiency concerning Transamerica Delaval Standby Diesel Generator ASME Section III, Class 3, piping. This matter was c.. cussed during a telephone conversation between E. Riley of The Cleveland Electric Illuminating Company and Mr. J. Neisler of your office, on March 29, 1982.

This report contains a description of the deficiency, an analysis of safety implication, and planned corrective action.

DESCRIPTION OF DEFICIENCY The Model DSRV16 Standby Diesel Cencrators were manufactured by Transamerica Delaval, Incorporated. Delaval is supplying four (4) diesel generator units that will be used as a standby power source for the Perry Nuclear Power Plant. During a pre-installation inspection program conducted by the installing contractor, diesel generator jacket water pipe 02.717.02 DV/75051 was found to have a fillet weld overlap which violated the surface condition of welds for ASME Section III Class 3 pipe. In addition, lub oil pipe 02.717.01 th/75051 had weld reinforce-ment which violated ASME Section III Class 3 requirements for weld reinforcement.

These nonconformances were documented on site nonconformance report PO 39-0477.

Upon the detection of these two nonconforming welds, a sampling of all code piping welds was initiated. This inspection consisted of approximately 20 pipes (100 welds), approximately 10 welds were nonconfeming. This indicates a potential 10% nonconformance rate for the remaining welds on code piping.

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e Mr. James Keppler April 28, 1982 ANALYSIS OF SAFETY IMPLICATIONS Failure of any welds in this piping could result in diesel generator unavailability.

However, failure of these welds is unlikely due to the low operating pressures of the systems and the large design margin used in system design.

CORRECTIVE ACTION Due to the results of previous inspections, an inspection of 100% of diesel genera-tor ASME code piping will be conducted. All deficient welds will then be repaired.

This inspection will be completed by September 1, 1982, and we are presently plan-ning to file our final report by October 1, 1982.

Sincerely, Dalwy R. Davidson Vice President System Engineering and Construction DRD/llp cc: Mr. M. L. Gildner NRC Site Director, Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 U. S. Nuclear Regulatory Commission c/o Document Management Branch Washington, D.C. 20555