ML20126H104
| ML20126H104 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 06/11/1985 |
| From: | Fiedler P GENERAL PUBLIC UTILITIES CORP. |
| To: | Zwolinski J Office of Nuclear Reactor Regulation |
| References | |
| TASK-03-06, TASK-3-6, TASK-RR NUDOCS 8506180252 | |
| Download: ML20126H104 (2) | |
Text
-
Nuolear
"::"= 9e""
Route 9 South Forked River, New Jersey 08731-0388 609 971-4000 Wnter's Direct Dial Number:
June 11, 1985 Mr. John A. Zwolinski, Chief Operating Reactors Branch No. 5 Division of Licensing U.S. Nuclear Regulatory Comission Washington, D. C.
20555
Dear Mr. Zwolinski:
Subject:
Oyster Creek Nuclear Generating Station Docket No. 50-219 SEP Topic III-6 Seismic Design Considerations Cable Tray / Conduit Test Program The purpose of this letter is to document our endorsement of the information transmitted to the NRC staff by SEP Owners Group concerning the cable tray / conduit test program which was conducted under the subject SEP topic.
In response to a generic issue related to the subject SEP topic, the SEP Owners Group initiated a comprehensive testing and analysis program to demonstrate the seismic adequacy of electrical cable trays and conduit raceways of the type used in SEP plants.
Letters dated April 29,1983 and August 31, 1983 from R. M. Kacich (Chairman - SEP Owners Group) to W. T.
Russell (Chief - SEP Branch, NRC) provided the Staff with the results of the dynamic test program and the analytical modeling of cable tray systems.
In sumary, the results of the SEP cable tray test and evaluation program provide reasonable assurance that the cable tray systems used in SEP plants including Oyster Creek will perform their structural function without any major failures for seismic motions up to their respected postulated safe shutdown earthquakes (SSE). This conclusion was based on the fact that no system failures occured in any of over 200 full-scale shake table tests of cable tray configurations selected, based on detailed plant walkdowns, as being typical of those in SEP plants. This conclusion is also supported by actual earthquake experience data from power plants and industrial facilities which have experienced strong motion earthquakes.
We trust the Staff will find the information transmitted by the SEP Owners Group sufficient to resolve the seismic qualification issue of the cable P
l GPU Nuclear Corporation is a subsidiary of the General Public Utikties Corporation
- tray / conduit contained in the Oyster Creek Integrated Plant Safety Assessment Report (IPSAR).
Very truly yours, P
Vice President and Director Oyster Creek 1r/1935f cc: Administrator Region I U.S. Nuclear Regulatory Commission 631 Park A/enue King of Prussia, Pa. 19406 NRC Resident Inspector Oyster Creek Nuclear Generating Station Forked River, N. J.
08731
.