ML19319B915
| ML19319B915 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 02/20/1976 |
| From: | Roe L TOLEDO EDISON CO. |
| To: | |
| Shared Package | |
| ML19319B913 | List: |
| References | |
| NUDOCS 8001290650 | |
| Download: ML19319B915 (1) | |
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TOLEDO b EDISON
' February 20,-1976 LOWELL E. ROE v.c. pr.....,e r.ca+.. c...ia-.ni Docket No. 50-346 Dr. Donald F. Knuth, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Co= mission Washington, D. C. 20555 o
Dear Dr. Knuth:
This letter is submitted as an interim report regarding the buckling of stainless steel plate areas in the top one third of the borated water storage tank at the Davis-Besse Nuclear Power Station, Unit #1. This was discussed by Mr. J. D. Lenardson, Quality Assurance Manager, with Mr. J. W. Sutton and Mr. D. W. Hayes, NRC Region III Office of Inspection and Enforcement, on February 11, 1976. This condition is viewed as a significant deficiency pursuant to 10CFR50.55.
The borated water storage tank is utilized during construction to tempor-v' arily store clean water for use in flushing and cleaning of completed portions of systems.
Buckling occurred during flushing water draw down activities.
Excess vacuum was created by an inoperative vacuum relief valve which had frozen in a partially open position. The necessary repairs will be accomplished by Chicago Bridge and Iron, following final engineering evaluation of the extent of damage and repair method to be employed.
A definitive repor*. of the deficiency, analysis of the safety implications, and the corrective action taken, will be submitted to your office in accordance with 10CFR5050.55 upon co=pletion of our study of this problem.
Yours truly,
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IJ. E. Roe Vice President, Facilities Development LER/jy ec:
J. G. Keppler, Regional Director Office of Inspection and Enforcement Region III p
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THE TOLEDO EDISON COMPANY EDISCN PLAZA 300 MADISON AVENUE TOLEDO, OHIO 43652
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