TXX-4724, Final Part 21 & Deficiency Rept CP-86-09 Re Defective Delaval Diesel Generator Inlet/Exhaust Valve Springs.Issue Not Reportable Under 10CFR50.55(e)

Final Part 21 & Deficiency Rept CP-86-09 Re Defective Delaval Diesel Generator Inlet/Exhaust Valve Springs.Issue Not Reportable Under 10CFR50.55(e)

ML20137Y037
Person / Time
Site:	Comanche Peak
Issue date:	03/03/1986
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-PT21-86-085-000 CP-86-09, CP-86-9, PT21-86-085-000, PT21-86-85, TXX-4724, NUDOCS 8603120082
Download: ML20137Y037 (1)

Text

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Log # TXX-4724 File # 10110 909.5 TEXAS UTILITIES GENER ATING COMPANY NMYW AY TEDWEIt + 4(Mt Nanails aptJVM NigeREt, t 38. a t . IsA31AM, TEM AM TS$ta t

, March 3, 1986 i -. -

a NM&??En'.h y& Q j { {

4 Mr. Eric H. Johnson, Director p-

Division of Reactor Safety and Projects

. U.S. Nuclear Regulatory Commission MAR - 71 %

611 Ryan Plaza Drive, Suite 1000 Arlington, TX 76012 3'L --

i

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION DOCKET NOS. 50-445 AND 50-446 O!ESEL GENERATOR INLET / EXHAUST VALVE SPRINGS SDAR: CP-86-09 (FINAL REPORT) l

Dear Mr. Johnson:

! On February' 13, 1986, we verbally notified your Mr. T. Westerman of a  ;

potential problem with the diesel generator inlet / exhaust valve springs.

The issue involves a 10 CFR Part 21 notice forwarded by the supplier (Delaval) of the diesel generators wherein defective valve springs were observed in a non-nuclear (marine) application.

Our evaluation has considered the supplier's position regarding the limited failure of the springs, which are restricted to a single application, the

! extensive operating conditions, and the requalification and verification j program implemented for the equipment at the jobsite. We concur the defec-i tive springs appear to be a material " batch" deficiency as opposed to a i manufacturing concern. Visual inspection has been completed for the Unit 1 installation and will be performed for Unit 2 during rework scheduled for i

May.

These efforts have resulted in our conclusion that this issue is not repor-table 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, g gf?lpt W. G. Counsil JCH/ arm I i

{ c - NRC Region IV (0 + 1 copy) ,

j  !

1 Director, Inspection & Enforcement (15 copies)

! U. S. Nuclear Regulatory Commission Washington, D.C. 20555 g a souvowm or n:uwsso.s som :owsure comrse B603120002 860J03

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