ML20064K104

Part 21 Rept Re Shaft Defects in Two Emergency Diesel Generator Sets Supplied to Ebasco Svcs,Inc for Util.Caused by Addl Length in Splined Driven End of Shafts.Replacement Will Be Completed by 780930

ML20064K104
Person / Time
Site:	Waterford
Issue date:	07/25/1978
From:	Bender B COOPER INDUSTRIES, INC.
To:
Shared Package
ML20064K097	List: ML20064K096 ML20064K100 ML20064K104 ML20064K106
References
NUDOCS 8009290398
Download: ML20064K104 (2)

Text

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.h T TA CU M E tJT R COOPER.cESSET.'En C07.':PANY

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July 25, 1975

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Office of Inspecticn and Enforcer.ent

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- U. S. ;iuclear P.cgulatery Co::issica s.

1.11ashington, D. C.

20555 Attn:

Director of' Inspection and Enforcecents

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In accordance with'10CFP. Part 21, this letter'uill provide

.nctification of a def ect that has been deternined to exist in supplied to Ebasco tuo emergency ste.nday diesel-generator sets

i. Services, Incorporated, "ew York, fi. Y. for Louisiana Power N at Taf t,

and Light Cc. pany's *!aterfo rd ficcicar Station Louisiana.

The defect exists in the two shafts which drive the engine speed control governcr and the engine overspeed shutdcan governer The splined driven end of the shafts nas canu-on cach engine.

factured tuo inches lenger than required by design specificasien.

lent;th cause; the shaf t spline to =isalicn with The additional the splined drive bushing, resulting in carginal engage =cct of the splined surfaces.

s The diesel-cenerator units are not operational at this ti=e, I

l so there is no actual safety hazard created by the defect.

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the units were operational and the shaf ts were to fati, follou-ing would be the consequences:

Overspeed Shutdown Covernor shaf t failure, enly - The unit would centinue to operate normally, but uculd Icse overspeed pro t.e c ti o n.

Speed Control Governor shaf t failure, only - The unit speed would rapidly proseed to crerspeed, at which point the Overspeed i

Governor would effect a shutdown o f the unit.

1 Sicultanecus failure of both shafts - The unit sceed uculd l

rapidly increase out of centrol until a =cchanicci failure Occurred, placing the unit cut of servict.

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2 identified in this letter is the only equipnent The ecofpnent known to be delivered to a nuclear f acility by C.E.S. that contains the defect described.

i s respcasible for The C.E.S.. Customer Services Department repl acc: en t of the shafts, P.eplacement will be coupleted by Septester 30, 1573.

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S. B. Ccadar, Vice-P'rcsident

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D. Sandiforth, Supervisina. Enc.incer cc:

Ebasco Services, Incorporated e

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(!cu York. fl.Y.

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K111o::, Louisicr.2 7C055

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