ML20064K106
| ML20064K106 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 07/25/1978 |
| From: | Bender B COOPER INDUSTRIES, INC. |
| To: | |
| Shared Package | |
| ML20064K097 | List: |
| References | |
| NUDOCS 8009290401 | |
| Download: ML20064K106 (2) | |
Text
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f} I I n L.t: En t: t's C.
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' p' '1 C00?Ei1 E!:ERGY SEP. VICES CNNie l
""4 M y 25. 197G
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Office of Inspection and Enforcement U. S. Nucl ea r F.egul a to ry Conmi ss ion Uachington, D. C.
20555
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ATTH:
Director of Inspection and Enforcecent Gentlenen:
a.
i In accordance with ICCFR Fart 21, this letter will previde noti fi ca t i c n of a defect that has been determined to exist in six ecergency standby diesel-cenerator sets suppliad to nuclear facilities by. Cocper Energy Services.
Four of the diesel-generators in question were procured by Sechtel Ccrperction, San Francisco, California for the Fcansyl-vania Pcuer and Light Ccrecny's Su:quehanna SteE.7 Electric Station at Ceruick. P ennsyl van i a.
The reczining two were procured by Ebasco Services, I n co r;:o ra t e d, iMw York, U.Y. for Louisiana ?cuer and Light Company's Waterford Huclear Station #3 at Taf t.
.c The defect e.xists in a spring which operates the overspeed shutdcun butterfly valve en the eng'ine turbechcnger air inlet
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connection.
The spring is picted with eicctrciytically deposited i
cadniun to prevent corrcsion.
Several identical springs have recently failed on units ttill in the process of nanufacture at C.E.S.
The c use of failure has been deter =ined to be cracks in the bcsc retal,' caused by tne electrolytic plating process.
l Although the springs tnat are installed en the above identified delivered units have not failed, the possibility of eventual failure necessitates replace = enc cf the spring on the delivered
. units.
Hone of the delivered units are operational at this tice, so l
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there is no actual sa fety hasard crea ted by the defect. If the l
units were opera:icn:1 and the spring uere to fail, ene of the two overspeed protection cevices provided on each engine uccid fail to perforn.
However, the other overspeed protectien dcvice, a fuel shut-of f techanisn activated by a nechanically driven
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tiould provide independently ef f ective engine overspeed protectien.
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The equipnant identified in this letter is the only equiprent delivered to a nuclea r f acili ty by C. E.S. ther. could contain the defect described.
The spring will be replaced with one cade fro:, a caterial that util not crack uhen cadniun plated.
The C.E.5. Cus ter:cr Se rvi ces departrent is responsible for a c cc r.p l i s h i n g t'he rep l a cece n t,
which we expect to conplete by Septer.ber 20, 1978.
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B. D. Bender. Vice-President Operations
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BBS/jvl cc:
J. R.
Schr.iedel. Profect Enginecr Bechtel Corporatica
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P. O. Eox 3955
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San Francisco, CA 94119 2.
D. Sandi forth, Supervising Engineer
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Ebtsco Services, Inccrporated
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~iwo Rector S tree t
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Heu York, H.Y.
10006 S pinnen, Site Quality Progr..= Mcnacer
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P.O. Ex 70
- i-Itillo:n, Louisiana 70 % 6
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