ML19338D478

Deficiency Rept Re Discrepancies in Installation & Insp Requirements for Class V safety-related Piping Supports. Caused by Inadequate Documentation to Ascertain That Supports Satisfy Design & Seismic Load Requirements

ML19338D478
Person / Time
Site:	Comanche Peak
Issue date:	09/18/1980
From:	Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
References
10CFR-050.55E, 10CFR-50.55E, TXX-3195, NUDOCS 8009230301
Download: ML19338D478 (2)

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, s' M TEXAS UTILITIES GENERATING COMInNY

' 2001 DRYAN TOWER

• DALLAS, TEXAS 75201

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R. J. GARY September 18, 1980

".'J.772. 7.'::"Jl:' TXX-3195 _

Mr. W. C. Seidle, Chief Reactor Construction & Engineering Support Branch U. S. Nuclear Regulatory Commission Office of Inspection & Enforcement 611 Ryan Plaza Dr., Suite 1000 Docket Nos. 50-445 Arlington, Texas 76012 50-446 f

COMANCHE PEAK STEAM ELECTRIC STATION 1981-83 2300 MW INSTALLATION CLASS V PIPING SUPPORTS FILE N0: 10110

Dear Mr. Seidle:

In accordance with 10 CFR 50.55(e) we are submitting the attached report ,

. of actions taken to correct discrepancies involving installation and I inspection requirements for Class V non-nuclear safety-related piping supports. We previously made a verbal report to Mr. R. G. Taylor on November 20, 1979 and submitted interim reports logged TXX-3127 and TXX-3162 dated April 21, 1980 and July 14, 1980, respectively.

Supporting documentation is available at the job-site for your inspector's review.

If we can provide any additional information, please advise. -

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Very truly yours,

/. . Gary R.

RJG:dk Attachment cc: NRC Region IV - (0 + 1 copy)

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

U. S. Nuclear Regulatory Commission Washington, D. C. 20555  ;

B009330N l

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t TXX-3195 Attachment September 18, 1980

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CLASS V PIPING SUPPORTS -

Description of the Deficiency Various sections of the FSAR establish the pertinent requirements for the design fabrication, installation, and inspection of seismic supports for Class V piping systems. The applicable project specification 2323-MS-46B does not clearly define the applicable quality requirements for the supports.

Consequently, there is insufficient rasitive assurance that the FSAR com-mitments have been satisfied.

Safety Implications As a result of the stated deficiency, there is no documented assurance that the supports would satisfy the design conditions and withstand the postulated seismic loadings. Therefore, this deficiency could possibly reduce the functioning of a Seismic Category I system or component to an unacceptable safety level.

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Corrective Actions To address the stated deficiency, the following corrective actions have been completed:

A) FSAR changes have been instituted to more clearly delineate the requirements for Seismic Category II piping supports for Class V piping systems.

B) Changes to project specification 2323-MS-46B have been issued to detail and clarify the quality requirements and pertinent provisions of 10 CFR 50, Appendix B, to be applied during design, fabrication and installation and inspection.

C) Implementing construction and inspection instructions have been prepared and are being used.for ongoing work activities. Previously installed hangers are being reworked as necessary and inspected on a system basis.