TXX-4801, Final Part 21 & Deficiency Rept CP-86-28 Re Gibbs & Hill non-nuclear Safety Classification of Svc Water Discharge Piping.Initially Reported on 860414.Issue Not Reportable Under 10CFR50.55(e)

Final Part 21 & Deficiency Rept CP-86-28 Re Gibbs & Hill non-nuclear Safety Classification of Svc Water Discharge Piping.Initially Reported on 860414.Issue Not Reportable Under 10CFR50.55(e)

ML20155J197
Person / Time
Site:	Comanche Peak
Issue date:	05/14/1986
From:	Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
REF-PT21-86, REF-PT21-86-187-000 CP-86-28, PT21-86-187, PT21-86-187-000, TXX-4801, NUDOCS 8605220094
Download: ML20155J197 (1)

Text

- Log # TXX-4801

. File # 10110 909.2 TEXAS UTILITIES GENERATING COMPANY SKYW AY TOWER . 400 NORTP OLIVE KTREET.1.B. 81

• DALLAN. TEXAB 78301 May 14,1986 _

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Mr. Eric H. Johnson, Director MAY I 6 I E A i Division of Reactor Safety and Projects \\ jb' U.S. Nuclear Regulatory Commission  ;

uL 611 Ryan Plaza Drive, Suite 1000 --

Arlington, TX 76012

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC. STATION DOCKET NOS. 50-445 AND 50-446 SERV CE WATER DISCHARGE PIPING SDAR: CP-86-28 (FINAL REPORT)

Dear Mr. Johnson:

On April 14, 1986, we verbally notified your Mr. T. F. Westerman of a defi-ciency involving the non-nuclear safety classification of the service water piping located outside buildings. This evaluation is the result of a Part 21 notice provided to the NRC by Gibbs & Hill.

The subject piping was designed, purchased, and installed as Safety Class 3 and is entirely buried in a Class 1 backfill up to the discharge structure.

The piping is considered to be seismically supported thus seismic failure is not applicable. The actual change in classification was made after installation at the last weld in the buried portion of the pipe approximately 40 feet from the point of discharge. This change in classification will not compromise the service water system's ability to provide safety related cooling. Even considering a moderate energy leakage crack in the non-safety portion of the piping, any leakage would flow downhill to the Safe Shutdown Impoundment. Therefore, this non-safety portion of piping is not a cause for a plant safety concern. We have concluded that this issue is not reportable under the provisions of 10CFR50.55(e). Records supporting this determination are available for your inspectors to review at the CPSES site.

Very truly yours, 8605220094 860514'-5 PDR ADOCK 0500 /

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W. G. Counsil JCH/arh c - NRC Region IV (0 + 1 ccpy)

Director, Inspection & Enforcement (15 copies)

U. S. Nuclear Regulatory Commission Washington, D.C. 20555 A DEVIS10N OF TEXAS tit 1LETTES E12CTERC COMPANY

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