ML19309A731

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Responds to IE Bulletin 79-28, Possible Malfunction of Namco Model EA180 Limit Switches at Elevated Temps. Requests Extension Until 800331 to Inspect safety-related Equipment & Implement Necessary Corrective Actions
ML19309A731
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 01/23/1980
From: Gary R
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To: Seyfrit K
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
IEB-79-28, NUDOCS 8004010147
Download: ML19309A731 (1)


Text

. . _

7ZG TEXAS UTILITIES GENERATING COMI%NY 2001 IIRYAN 7T)WF.R

  • DALLA & TEX AN 75203 o.a.cany- January 23, 1980 {

":."::::::*?:::' TXX-3091 -

i Mr. Karl V. Seyfrit, Director U. S. Nuclear Regulatory Commission -

Region IV RIV i 611 Ryan Plaza Drive, Suite 1000 Docket Nos. 50-445/IE Bulletin No. 79-28 '

Arlington, Texas 76012 50-446/IE Bulletin No. 79-28 COMANCHE PEAK STEAM ELECTRIC STATION 1981-83 2300 MW INSTALLATION IE BULLETIN 79-28

. FILE NO: 10115'

Dear Mr. Seyfrit:

Our review of NAMC0 limit switches in reference to IE Bulletin 79-28, dated December 7,1979, is not yet complete.

To date, our Architect-Engineer has determined that a minimum of 236 EA-180 NAMC0 switches are specified in safety-related equipment. A field task force is presently determining which switches, if any, have the 02-79 through 08-79 date code. We are now following up on our written requests to all. relevant vendors, including the NSSS supplier, to determine if any more of the switches in question are specified.

A meeting has been arranged on January 24, 1980 between Gibbs & Hill, i TUSI and NAMC0 to discuss the schedule, materials, and methodology of gasket replacement.

i We request an extension to March 31, 1980 to determine the scope of - l the problem and implement corrective action as necessary. If there l are any questions, please advise. 1 4R Very truly yours, i l

R.4 . Gary  !

RJG:df  :

i cc: U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement !l

. Division of Reactor Operations Inspection ll Washington, D. C. 20555 l

!I i

l 8004010lK7

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