ML17255A370
| ML17255A370 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 08/19/1983 |
| From: | Maier J ROCHESTER GAS & ELECTRIC CORP. |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| TASK-03-07.B, TASK-3-7.B, TASK-RR NUDOCS 8308240099 | |
| Download: ML17255A370 (6) | |
Text
REGULATOR NFORMATION DISTRIBUTION TEM (RIDS)
ACCESSION NBR'8308240099 DOC DATE! 83/08/19 NOTARIZED, NO DOCKET ¹ FACIL:50-244 Robert Emmet Ginna Nuclear Planti Uni,:t li Rochester
-G 05000244 AUTH BYNAME AUTHOR AFFILIATION MAIERiJeE
~
Rochester Gas 8 Electric Corp<
REC IP, NAME RECIPIENT AFFILIATION CRUTCHFIELDt D ~
Operating Reactors Branch 5
SUBJECT:
C,larifies 830519 5 27 ltrs re SEP Topic III'-8< "Design Codes<Design Criteria L Load Co~nbinations."
Concrete Code change evaaluation results apply to all ~acquired loading conditions.
DISTRIBUTION CODE:
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SEP Topic NQTES:NRR/DL/SEP
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O TOTAL NUMBER OF COPIES REQUIRED; I 'TTR 22 ENCL
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ROCHESTER GAS AND ELECTRIC CORPORATION
~ 89 EAST AVENUE, ROCHESTER, N.Y. 14649 POHN E MAILER Vito President tCi.CPHDNC ARCA CDDC tlat 546-2700 August 19, 1983 Director of Nuclear Reactor Regulation Attention:
Mr. Dennis M. Crutchfield, Chief Operating Reactors Branch No.
5 U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
SEP Topic IIX-7.B, Design Codes, Design Criteria, and Load Combinations R. E. Ginna Nuclear Power Plant Docket No. 50-244
Dear Mr. Crutchfield:
The purpose of this letter is to clarify our submittals of May 19, 1983 and May 27, 1983 regarding SEP Topic XII-7.B, "Design
- Codes, Design Criteria, and Load Combinations."
In Section 4.0 of Appendix A attached to the May 19, 1983
- report, a discussion of the significant code changes related to steel structures is provided.
It is stated that only normal operating loads and load combinations were used in the code change comparisons.
Actually, these normal operating loads and load combinations were used only in the initial screening.
Where it was determined that a code change was significant, specific analysis was performed using all of the load combinations defined in Table 2-4 of that report, which also included extreme condi-tions for tornado loadings.
- However, no specific analysis of code changes for steel elements was performed using SSE load combina-tions.
A review of the specific code changes makes it apparent that some code changes were considered not applicable or insig-nificant.
Potentially significant changes include compression
- elements, tension
- members, coped
- beams, moment connections, and steel embedments.
RG&E considers that the main structural elements (compression elements and tension members) can be considered as previously analyzed and accepted by virtue of the overall Lawrence Livermore Laboratory analysis for the Ginna structures, as provided in NUREG/CR-1821.
No additional analysis is considered necessary by RG&E.
The remaining code changes concerning coped
- beams, moment connections, and steel embedments 8308240099 8308i9 PDR ADOCK 05000244 P
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oATE Augus't 1 9 g 1 983 Mr. Dennis M. Crutchfield SHEET NO.
will be evaluated by RG&E relative to seismic loadings in con-junction with the proposed Structural Upgrade Program.
It should be noted that the significant load combinations to be applied to these elements are defined in Attachment 2 to RGGE's May 27, 1983 letter relative to SEP Topic III-7.B.
In Section 5.0 of Attachment 3 to the May 27, 1983 letter, a
description of the concrete code changes is provided together with an evaluation of the results.
It should be noted that, for these code changes, the elements were reviewed using all of the loads and load combinations, and their magnitudes, as defined in Sections 4.1 and 4.2 of Attachment 3.
These included both extreme tornado and extreme seismic loadings.
Consequently, it can be concluded that the concrete code change evaluation results apply to all required loading conditions.
Very truly yours, hn E. Maier
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