ML20063K057

Final Deficiency Rept Re Failure of Matl Used in Governor Drive Coupling for Transamerica Delaval Diesel Generators. Initially Reported on 820730.Rework Will Be Completed by 820615.Also Reported Under Part 21 by Manufacturer

ML20063K057
Person / Time
Site:	Perry
Issue date:	08/26/1982
From:	Davidson D CLEVELAND ELECTRIC ILLUMINATING CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8209030171
Download: ML20063K057 (2)

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r THE CLEVELAND ELECTRIC ILLUMIN ATING COMPANY P o BOX 5000 J CLEVELAND. OHlo 44101 a TELEPHONE (2161022-9600 m ILLUMINATING BLDG e 55 PUBLIC SOUARE Serving The Best Location in the Nation D:lwyn R. Davidson viCE PRESIDE NT S(5 TEM ENGINEERING AND CONSTRUCTION August 26, 1982 Mr. James G. Keppler Regional Administrator, Region III Of fice of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 RE: Perry Nuclear Power Plant f Docket Nos. 50-440; 50-441 l Final Report on the Governor Drive Coupilng [RDC 59(82)] l

Dear Mr. Keppler:

This letter serves as a final report as required by 10CFR50.55(e) concerning a potent tal significant deficiency in the material used in the governor drive coupling for the Transamerica Delaval diesel generators. It was reported by Mr. R. L. Vondrasek of The Cleveland Electric Illuminating Company (CEI) on July 30, 1982, in a telephone conversation with Mr. Paul Pelke of your office.

The potential deficiency concerns the standby diesel generators, model DSRV 16 supplied by Transamerica Delaval, Incorporated. Tranaamerica Delaval notified the NRC of this potential deficiency under 10CFR21 in a letter dated June 23, 1982. CEI received this informa tion in a le t ter da ted Augus t 18, 1982. This report contains a descrip tion of the deficiency, an analysts of safety imp 11-cation, and a corrective action planned.

Descrip tion of Deficiency Transamerica Delaval is supplying four (4) diesel generator units (model DSRV 16) for the Perry Nuclear Power Plant (PNPP) that will be used as a s tandby power source for the PNPP.

The potential deficiency, as described by Transamerica Delaval, exists in the governor drive coupling. The fallure could result in engine nonavailability.

The potential defect is related to the matertal used in the couplings. The material, an isoprene, was designed for atmospheric use and is not suitable for use in high-temperature, oil atmosphere encountered in the engines' gear case, r209030171 820826 DR ADOCK 05000 Q[/[

AUG 3 01982

' Mr. James G. Keppler Auguat 26, 1982 2

Analysis of Safety Implications Transamerica Delaval has reported that the rubber used in the coupilng drive element deteriorates rapidly and ultimately fails. While the coupling is "f all safe" and will mechanically lock-up when the element falls, suf ficient frequency instability could be induced that would result in the engines tripping off-line.

Corrective Act Ion The corrective action will be to replace the coupling's flexible element and, if necessary, replace the governor drive coupling. This will be accomplished in accordance with Transamerica Delaval's recommended corrective action (letter dated 8-18-82). The rework will take place during the normal installation program under the direction of a Delaval service representative. The work will be comple ted by June 15, 1983.

Sincerely, Dalwyn v. Davidson Vice President Sys tem Engineering and Cons truction DRD:pab cc: Mr. M. L. Gildner NRC Site Of fice Director Of fice of Inspection and Enforcement U.S. Nuclear Regula tory Commission "

Washington, D.C. 20555 U.S. Nuclear Regulatory Commission c/o Document Management Branch Washington, D.C. 20555 J