ML20094Q734

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Suppl 7 to Part 21 Rept Re Possible Thermostatic Valve Malfunction Fail Safe to Full Cooling Position.Lower Overrun Assemblies in Robertshaw Valves Installed on Diesel Generator Sets Replaced W/Cotter Pins to Lock Nut to Stem
ML20094Q734
Person / Time
Site: Limerick 
Issue date: 08/08/1984
From: Moriarty J
COLT INDUSTRIES, INC.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
REF-PT21-84-425-000 PT21-84-425, PT21-84-425-000, NUDOCS 8408200307
Download: ML20094Q734 (1)


Text

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DY Colt industries

[Ejn*,"U,%'n' 701 Lawton Avenue Beloit. Wisconsin 53511 608/364-4411 August 8,1984 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 Fail Safe To " Full Cooling Position" Part 21 Report Supplemental Report No. 7 Philadelphia Electric Co.-Limerick Unit #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 Philadelphia Electric Co.-Limerick Unit #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, JMM:jc MANAGER UTILITY cc: Philadelphia Electric Co.

2301 Market Street Philadelphia, PA 19101 t

Attention: Mr. Dick Mulford Limerick Project Manager l

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

20555 Robertshaw Controls Company M[]$ $ 0 l004 P. D. Box 400 Knoxville, TN 37901 Attention:

T. T. Howell, Quality Mgr.

8408200307 840808 4

PDR ADOCK 05000352

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