ML19305B094

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Responds to IE Bulletin 79-28, Possible Malfunction of Namco EA180 Limit Switches at Elevated Temps. Namco EA180 Switches,Dtd Code 790202-790824,not Used in Safety or nonsafety-related Circuits at Facility
ML19305B094
Person / Time
Site: La Crosse File:Dairyland Power Cooperative icon.png
Issue date: 12/17/1979
From: Linder F
DAIRYLAND POWER COOPERATIVE
To: Keepler J
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
IEB-79-28, NUDOCS 8003190141
Download: ML19305B094 (1)


Text

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DAIRYLAND POWER COOPERATIVE Sa Gro w, O L oaan

$4601 December 17, 1979 In reply, please refer to LAC-6690 DOCKET NO. 50-409 Mr. James G. Keppler Regional Director U. S. Nuclear Regulatory Co:mnission 1

Directorate of Regulatory Operations Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137

SUBJECT:

DAIhYLAND POWER COOPERATIVE LA CROSSE BOILING WATER REACTOR (LACBWR)

PROVISIONAL OPERATING LICENSE NO. DPR-45 IE BULLETIN NO. 79 POSSIBLE MALFUNCTION OF NAMCO MODEL EA180 LIMIT SWITCHES AT ELEVATED TEMPERATURES i

Reference:

(1) NRC Letter, Keppler to Linder, dated December 10, 1979.

1

~

Dear Mr. Keppler:

In response to your letter (Reference 1) containing IE Bulletin No. 79-28, we have determined the following:

1)

NAMCO EA180 switches, i.e.,

dated code, February 2, 1979 through August 24, 1979, are not used or planned to be used in safety or non-safety related circuits at the LACBWR facility, including circuitry related to containment isolation valves.

l If there are any questions concerning this response, please contact j

us.

l very truly yours, DAIRYLAND POWER COOPERATIVE

.l i

ts.-.

Frank Linder, General Manager

~

FL:WRN:af j

cc:

U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Division of Reactor Operation Inspection Washington, D.

C.

20555 JA N 2 31980 P

Toof/90/W

.