ML20010A482

Interim Deficiency Rept Re Alignment Difficulties in Diesel Generator Pipe Supports,Originally Reported on 800926.Weld Program Initiated & Supporting Documentation Compiled to Certify Compliance W/Asme Code

ML20010A482
Person / Time
Site:	Comanche Peak
Issue date:	07/29/1981
From:	Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	Madsen G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, TXX-3374, NUDOCS 8108110468
Download: ML20010A482 (2)

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IE H@s Glle topy TEXAS I'TILITIES GENERATING COMinNY 2'est liftYAN TOWEli

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"";' air;"J# ' July 29, 1981 TXX-3374 Mr. G. L. Madsen, Chief Reactor Projects Branch U. S. Nuclear Regulatory Commission Office of Inspection & Enforcement 611 Ryan Plaza Dr., Suite 1000 Docket Nos. 50-445 Arlington, TX 76012 50-446 COMANCHE PEAK STEAM ELECTRIC STATION DIESEL GENERATOR PIPE SUPPORTS FILE N0: 10110

Dear Mr. Madsen:

In accordance with 10 CFR 50.55(e), we are suomitting the attached report of actions taken to correct the identified deficiency regarding the diesel generator pipe supports. We previously made a verbal report to Mr. W. C.

Crossman on September 26, 1980 and submitted interim reports logged TXX-3222 and TXX-3268, dated October 21, 1980 and January 12, 1981, respectively.

Supporting documentation is available at the CPSES site for your Ins ector's '

review.

If we can provide any additional information, please advis q4 'g Very truly yours, i

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Attachment c: NRC Region IV - (0 + 1 copy)

Director, Inspection & Enforcement - (15 copies) c/o Distribution Services Branch, DDC, ADM.

U. S. Nuclear Regulatory Commission Washington, DC 20555 pp J

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8108110468 810729 '

PDR ADOCK 05000445 S PDR

y TXX-3374 July 29, 1981 ATTACHMENT DIESEL GENERATOR t 'E SUPPORTS DESCRIPTION OF DEFICIENCY The technical specifications for the CPSES Unit 1 and 2 Diesel Generators imposed the requirements of ASME III Subsection ND for auxiliary piping systems which imposed the requirements of Subsection NF on associated component supports. The effective edition of the Code required stamping of these supports.

The component supports - fabricated by the supplier (Delaval) - were shipped partially assembled on the auxiliary did base unit fabricated by a subtier vendor (Kaiser Steel). All welds were shop inspected by the supplier in accordance with a shop procedure based upon ANSI B31.1 for visual inspection.

Piping alignment difficulties encountered in the installation of the component supports necessitated the review of supplier /subtier vendor documentation. This review indicated the supplier had manufactured the supports without ac.knowledging the raqeirements of Subsection NF.

ANALYSIS OF SAFETY IMPLICATIONS In a seismic event resulting in the loss of off-she electrical sources, an inadequacy of power necessary to operata plant safety related auxiliaries could result.

CORRECTIVE ACTION Corrective Action for the deficient condition consists of establishing compliance of the fabrication of the supports to the AISC Code. The design of the supports has been certified by the supplier to be in accordance with the ASME Code.

Two major activities are included in this effort:

1. Weld Inspection - Using an inspection program based upon AWS Dl.1, Construction Quality Control personnel will inspect all accessible welds. Unacceptable welds will be evaluated and appropriately dispositioned by Engineering.

2. Supporting Documentation - A package will be compiled by Engineering which will provide acceptable documentation for the component supports. The package will consisit of:

a) Welding Procedures b) Welder Qualifications c) Material Certifications Corrective Action including rework as required will be completed prior to fuel delivery to site.