ML20204F532

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Supplemental Part 21 Rept 6 Re Possible Thermostatic Valve Malfunction fail-safe to Full Cooling Position.Lower Overrun Assemblies in Robertshaw Valves on Diesel Generator Sets Replaced W/Assemblies Using Cotter Pins
ML20204F532
Person / Time
Site: Callaway 
Issue date: 04/21/1983
From: Moriarty J
COLT INDUSTRIES, INC.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
REF-PT21-83 NUDOCS 8305020133
Download: ML20204F532 (1)


Text

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Colt Industries Engine Division 701 Lawton Avenue Beloit. Wisconsin 53511 608/364-4411 April 21,1983 Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Ill. 60137 Attention: Mr. James G. Keppler, Director, Region III

Subject:

Colt Industries-Fairbanks Morse Engine Division Emergency Diesel Generators Possible Thermostatic Valve Malfunction i

Fail Safe To " Full Cooling Position" i

Part 21 Report Supplemental Report No. 6 - SNUPPS Union Electric - Callaway #1

References:

May 25,1982; June 28,1982 and September 17, 1982 Part 21 Reports - Robertshaw Valves - same subject Gentlemen:

The lower overrun assemblies in the Robertshaw valves installed on the Diesel Generator Sets at Union Electric - Callaway #1 have been replaced with overrun assemblies utilizing cotter pins to positively lock the nut to the stem.

The units are now free of the reported potential defect.

A copy of this report is being forwarded to the utility involved.

Very truly yours,

/

~

J. t. Moriarty MANAGER UTILI ES cc:

Bechtel Power Corp.

15740 Shady Grove Road i

Gaithersburg, MD 20877 Attention: SNUPPS Project Engineer U. S. Nuclear Regulatory Comission c/o Document Management Branch Washington, D.C.

20555 Robertshaw Controls Company P. O. Box 400 Knoxville, TN 37901 Attention:

T. T. :lowell, Quality Mgr.

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