ML19344E471

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Responds to IE Bulletin 80-17,Suppl 2,re Failure of Control Rods to Insert During Scram.Swing Check Valve Operation Checked Daily & Meets Positive Venting Requirement
ML19344E471
Person / Time
Site: Cooper Entergy icon.png
Issue date: 07/28/1980
From: Pilant J
NEBRASKA PUBLIC POWER DISTRICT
To: Seyfrit K
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
IEB-80-17, NUDOCS 8009020098
Download: ML19344E471 (1)


Text

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. - - . ._ i July 28, 1980 Mr. Karl V. Seyfrit, Director U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region IV 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76011

Subject:

IE Bulletin No. 80-17, Supplement No. 2

Dear Mr. Seyfrit:

This letter is written to document our actions on Supplement No. 2 to IEB No. 80-17. You contacted L. C. Lessor by telephone on July 19, 1980 to discuss the additional information from scram testing at other BWR's. It is our understanding that you also stated that an alternate vent path was required on certain plants. It is our understanding that you concurred with L. C. Lessor that no alternate vent path was required at Cooper Nuclear Station because venting is now directly to the atmosphere through a short section of line attached to the air operated vent valve.

We received the Supplement No. 2 to IEB No. 80-17 on suly 25, 1980. After further review of this supplement, we have not chans d our position but feel that we must stress that we do depend on a check valve for proper venting. A simple swing check valve permits air entry for venting and provides backup to the vent valve for containing the contaminated water following a scram.

The operation of this check valve is checked daily by the previously required scram discharge volume surveillance test. This arrangement may not be consistent with the wording in the first sentence of action item 1 in the supplement; however, we believe that we meet the intent of the positive venting requirement.

l If you have any questions on this response, please contact L. C. Lessor at Cooper Nuclear Station.

Sincerely.

-?.-

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  1. -lio; cX cc: USNRC J. M. Pilant Office of Inspection and Enforcement l

Director of Licensing Division of Reactor Operations l and Quality Assurance Inspection Washington, D.C. 20555 JMP:LCL: bas l

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