ML19350D368
| ML19350D368 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 04/08/1981 |
| From: | Tedesco R Office of Nuclear Reactor Regulation |
| To: | Parker W DUKE POWER CO. |
| References | |
| NUDOCS 8104150329 | |
| Download: ML19350D368 (3) | |
Text
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UMTED STATES e
NUCLEAR REGULATORY COMMISSION h <>--
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E WASHINGTON, D. C. 20$55 7; ~
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50-369 and 50-370 g
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Duke Power Company (f,
ATTN:
Mr. William O. Parker, Jr.
Vice President - Steam Production 2-ApO2 31981w.6 P. 0. Box 33189
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,k 422 South Church Street
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Dear Mr. Parker:
Subject:
Piping Seismic Analysis Methods (McGuire Nuclear Station, Units 1 & 2)
Your report, " Review of Piping Seismic Ar:alysis Methods" of March 2,1981 indicates that in 22 out of 355 piping math models, the seismic analysis portion of the design used reponse spectra other than the envelope spectra as required by Standard Review Plan 3.7.3.
We find that the information submitted is not acceptable to justify this deviation from the SRP. We will, therefore, require that the safety margin of these piping math models be determined by reanalyzing and including the envelope of the spectra in the seismic portion of the analysis.
Specifically, we request that you provide the following information:
I 1.
A list of all reanalyzed problems.
2.
For each piping problem:
a.
Prescribed loading conditions.
i b.
The largest code computed stresses for the combined loading I
conditions and its location.
Corresponding ASME Service Level allowable.
c.
d.
Internal loads on all supports, and at equipment nozzles.
l Corresponding allowable loads and the basis for their l
e.
acceptability.
f.
Confirmation of base plate bolt factors of safety per IE Bulletin 79-02.
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1 AEE O ISOI We consider that submittal of the requested infomation will meet our 90 day reanalysis requirement described in Section 3,7.2 of Suppicment No. 5 to the Safety Evaluation Report.
Sincerely, NOMec Robert L. Tedesco, Assistant Director for Licensing Division of Licensing cc: See next page
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c Mr. William 0. Parkero Jr.
Vice President, Steam Production
- Duke Power Company P. O. Box 2178 422 South Church Street Charlotte, North Carolina 28242 cc: Mr. W. L. Porter Mr. Tom Donat Duke Power Company Resident Inspector McGuire NPS P. O. Box 2178 c/o U.S. Nuclear Regulatory Commission 422 South Church Street Post Office Box 216 Charlotte, North Carolina 28242 Cornelius, North Carolina 28031 Mr. R. S. Howard Shelley Blum, Esquire Power Systems Division 1402 Vickers Avenue Westinghouse Electric Corporation Durham, North Carolina 27707 P. O. Box 355 Pittsburgh, Pennsylvania 15230 Dr. Richard F. Cole Administrative Judge Mr. E. J. Kei th U. S. Nuclear Regulatory Commission EDS Nuclear Incorporated Washington, D. C.
20555 220 Montgomery Street San Francisco, California 94104 Mr. J. E. Houghtaling NUS Corporation 2536 Countryside Boulevard Clearwater, Florida 33515 Mr. Jesse L. Riley, President The Carolina Environmental Study Group 854 Henley Place Charlotte, North Carolina 28207 J. Michael McGarry, III, Esq.
Debevoise & Liberman 1200 Seventeenth Street, N. W.
Washington, D. C.
20036 Robert M. Lazo, Esq., Chairman Atomic Safety and Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Dr. Daneth A. Luebke Atomic Safety and Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C.
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