ML19329B225
| ML19329B225 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse, Oconee, Crystal River, Rancho Seco, Crane  |
| Issue date: | 05/08/1975 |
| From: | Roe L TOLEDO EDISON CO. |
| To: | |
| Shared Package | |
| ML19329B226 | List: |
| References | |
| NUDOCS 8001310575 | |
| Download: ML19329B225 (1) | |
Text
--
., ~
fr 2, fr E-TCLEDO b BOISui'd LOWELL E. ROE May 8, 1975 Sc'a*t.es Deveicornent Fac (4193 259-5242
~
Docket No. 50-346*
l Dr. Donald F. Knuth, Director Office of Inspection & Enforcement U.S. Nuclear Regulatory Commission
]
Washington, D.C.
20555
Dear Dr. Knuth:
i This letter is submitted as an Interim Report regarding the deficiency l
in the seismic qualification of the control rod drive control system AC l
trip breaker cabinets for the Davis-Besse Nuclear Power Station Unit 1.
As previously discussed with Mr. J. Sutton, NRC-DRO Region III inspector, i
the matter is viewed as a significant deficiency pursuant to 10CFR550.55(e).
A reevaluatien of the ceimic ge:,lificeren of the AC hren'm enhimon has found that the attachment of(the cab nets to the floor is inadequate to withstand the SSE acceleration levels. An analysis is presently i
being undertaken to redesign the mounting of the cabinets.
.~
A definitive report of the deficiency, analysis of the salety implications, i
and the corrective action taken will be submitted to your office in accordance with 10CFR550.55(e) upon completion of our study of this problem.
Yours very truly,
[
mj c/6 cc:
J. G. Keppler, Regional Director Office of Inspection and Enforcement Region III 8001310 7 7[
f m 10mco msc~ cc_
mso m m eco - so~ _ m 1cmoa. cso m se
.]
e
-