ML20030D236
| ML20030D236 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 08/25/1981 |
| From: | Colbert W DETROIT EDISON CO. |
| To: | Kintner L Office of Nuclear Reactor Regulation |
| References | |
| EF2-54-761, NUDOCS 8109010002 | |
| Download: ML20030D236 (1) | |
Text
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Detroit b
Ecison RiE!*
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August 25, 1981
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EF2-54,761
') )'.," ) :a Mr. L.L. Kintner Division of Project Management Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555
References:
- 1) Enrico Fermi Power Plant-Unit 2
- 2) USNRC Licensing Docket 50-341
Subject:
Seismic Reassessment of NSSS Piping
Dear Mr. Kintner:
In selecting the response spectra for the seismic analysis of the NSSS piping, Edison used the response spectra corresponding to the center of gravity of the piping system.
It is our understanding that this methodology for the selection of response spectra is not acceptable to the hTC staff.
In response to this open item, Edison commits to perform the "as-built" analysis of the NSSL piping using the envelope method or the multiple support excitation method of seismic response spectrum analysis. The SSE response will be obtained by multiplying the OBE response by 1.875 or by using the site-specific SSE response spectra.
l If you require further input in this matter, please advise, l
i Yours very truly,
?f W.F. Colbert, Technical Director Enrico Fermi Unit 2 l
wFC/MSw/sp l
300/
J
//o l
l 8109010002 810825 PDR ADOCK 05000341 PDR-A l
._