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)
| 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) | |
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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
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Mr. Eric H. Johnson, Director p-4 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 manufacturing concern.
Visual inspection has been completed for the Unit 1 i
installation and will be performed for Unit 2 during rework scheduled for May.
i 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, gf?lpt g
W. G. Counsil JCH/ arm I
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Director, Inspection & Enforcement (15 copies)
U. S. Nuclear Regulatory Commission Washington, D.C.
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