ML20086C020

Interim Deficiency Rept Re Polar Gantry Crane Gear Misalignment.Initially Reported on 760611.Caused by Misalignment of Hoist Drum Gear & Pinion.Drum Assembly Realigned & Secured & Dressing Gears Initiated

ML20086C020
Person / Time
Site:	Salem
Issue date:	06/17/1976
From:	Schwalje E Public Service Enterprise Group
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086C016	List: ML20086C020
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8311220534
Download: ML20086C020 (2)

Text

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, o Pubhc Service Electric and Gas Company 80 Park Piace Newark, N.J. 07101 Phone 201/C22 7000 ...

z June 17, 1976 l4 Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region 1 631 Pa rk Avenue King of Prussia, Pennsylvania 19406

Dear Mr. O ' Re illy :

a PG LAR G AN TRY CRANE - GEAR MISALIGNMENT NO. 1 Uh2T '

SA LEM NUC LEA R GENERATIN G STATION On June ll, 1976 a verbal report was made to Region 1, Office of Inspection and Enforcement advising that during an inspection s,

it was discovered that there was a misalignment of gearing in . ;

the No. 1 Unit Polar Gantry Crane. This report was in accordance ,

with the provisions of 10CFR50.55(e). =

The following is a detailed analysis and report on the subject:

~

While performing a service-inspection of the Polar Gantry Crane .

during turnover from the plant construction phase to the plant -,

operating phase, excessive vibraticn of the main hoist was observed. After investigating, the cause of the vibration was -

determined to be the misalignment of the hoist drum gear (drum _

assembly) ano pinion. .-

Corrective action consisting of realigning and securing the drum assembly, and dressing the gears has been initiated.

There was no affe^t to the safety or health of the operating staff or the general public. The implications of this condition, if it were not corrected, are that the hoist assembly would be -

subjected to above normal wear and over an extended period of =

years the load carrying capability of the crane would have been -

adversely effected. -

The corrective action vill be comple ted by July 1, 1976. $

0311220534 760706 PDR ADOCK 05000g7g PDR . -

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Mr. James P. O'Reilly 6/17/76 Should you require additional information our engineers will be available to discuss the details with you.

Very truly yours,

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E. N . i Schwalje Manager of Quality Assurance Engineering and Construction Department CC: Dr. Ernest Volgenau Bethesda, Md.

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