ML19262C408

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Responds to IE Bulletin 79-28.NAMCO EA180 Switches Not Used or Planned for Use in Safety or nonsafety-related Circuits at LACBWR Facility
ML19262C408
Person / Time
Site: La Crosse File:Dairyland Power Cooperative icon.png
Issue date: 12/17/1979
From: Linder F
DAIRYLAND POWER COOPERATIVE
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
IEB-79-28, NUDOCS 8002120195
Download: ML19262C408 (1)


Text

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b DAIItYLAND POWEIt COOPEIRATIVE Sa Crosu, 0%nsin 54601 December 17, 1979 In reply, please refer to LAC-6690 DOCKET NO. 50-409 Mr. James G.

Keppler Regional Director U.

S.

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

SUBJECT:

DAIRYLAND POWER COOPERATIVE LA CROSSE BOILING WATER REACTOR (LACBWR)

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

Reference:

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

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.

If there are any questions concerning this response, please contact us.

Very truly yours, DAIRYLAND POWER COOPERATIVE f

~

r_ At~L g

Frank Linder, General Manager FL:WRN:af cc:

U. S. Nuclear Regulator / Commission k 9 g 2).

Office of Inspection and Enforcement Division of Reactor Operation Inspection Washington, D.

C.

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