ML19284A841

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Advises That on 791023,reactor Refueling Canal Damage Was Discovered in Underlying Q Concrete of Floor Liner Plate. Caused by Erroneous Pressure Test.Depite Judgment of Nonreportability Per 10CFR50.55(e),evaluation Will Be Sent
ML19284A841
Person / Time
Site: Wolf Creek Wolf Creek Nuclear Operating Corporation icon.png
Issue date: 12/06/1979
From: Koester G
KANSAS GAS & ELECTRIC CO.
To: Seidle W
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
NUDOCS 8002220525
Download: ML19284A841 (1)


Text

s n hfA/ k KANSAS GAS AND ELECTRIC COMPANY GLENN L. RO CSTER vict PatssoENT-optmanoses December 6, 1979 Mr. W.C. Seidle, Chief Reactor Construction and Engineering Support Branch U.S. Nuclear Regulatory Cormnission Region IV 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76012 Re: Docket No. STN 50-482 Subj: Reactor Refueling Canal Damage

Dear Mr. Seidle:

On October 23 while at the Wolf Creek Site, Mr. Oberg was advised of buckling in the floor liner plate of the refueling canal. The canal liner is not a Q listed item, however, on November 6 after removing a section of floor liner plate to investigate the problem, it was revealed that the top 4 to 5 inches of the underlying "Q" concrete was damaged.

This was also reported to Mr. Oberg.

The damage was the result of erroneously trying to pressure test the leak chases behind the liner plate.

It is our preliminary judgment that this problem, if left uncorrected, would not result in a significant safety hazard as addressed in Regulation 10CFR50.55(e). Our A/E is making an engineering evaluation of this matter and if this evaluation shows that damage to the floor of the refueling canal has safety significance, we will report further.

Yours very truly, 1g GLK:bb 8002220 pg 201 N. Market - Wichita, Kansas - Mail Address: P. O. Box 208 / Wichita, Kansas 67201 - Telephone: Area Code (316) 264-1111