ML19329B165

Interim Deficiency Rept Re Reactor Vessel Surveillance Capsule Holder Tube Holddown Mechanism.Tubes to Be Removed. B&W Working on Design Mods for Modified Sys Installation Prior to Hot Functional Testing

ML19329B165
Person / Time
Site:	Davis Besse
Issue date:	05/07/1976
From:	Roe L TOLEDO EDISON CO.
To:
References
NUDOCS 8001300735
Download: ML19329B165 (2)

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%ss EDISON Docket No. 50-346 LOWELL E. RCE v.c. u e....ns Facia. ties Cevotooment Y 7' (4191 259 5242 Dr. Emst Volgenau, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Dr. Volgenau:

This letter is submitted as an Interim Report regarding Davis-Besse Nuclear Power Station Unit I reactor vessel surveillance capsule holder tube holddown mechanism as Str. J. D.

Lenardson, Toledo Edison Quality Assurance 5fanager, discussed by telecon with your Sir. D. liayes, NRC Region 111 Office of Inspection and Enforcement on April 8,1976.

The design of the subject holddown mechanism is viewed as a significant deficiency pursuant to 10 CFR 50.55(e).

The present surveillance capsule holder tubes are being removed and the reactor vendor, The Babcock and Wilcox Company, is attempting to complete the design modifications in time to install the modified system in the Davis-Besse Unit I reactor vessel prior to llot Functional Testing.

A definitive report of the deficiency, analysis of the safety implications. and the corrective action taken will be submitted to your office in accordance with 10 CFR 50.55(e) upon completion of our study of this problem.

Yours very truly, cp 2ee/3 cc:

J. G. Keppler, Regional Director Office of Inspection and Enforcement Region Ill THE TOLECO ECISON CCMPANY EDISON PLAZA 300 MADISON AVENUE TCLECO. CHIO 43 2