ML17254A689

Forwards R562-N4, Reinforced Masonry Wall Evaluation, Evaluation of Control Bldg Reinforced Walls, Documenting Results of Elastic & Inelastic Analyses for Selected Masonry Walls.Commitments Re IE Bulletin 80-11 Complete

ML17254A689
Person / Time
Site:	Ginna
Issue date:	12/19/1985
From:	Kober R ROCHESTER GAS & ELECTRIC CORP.
To:	Lear G Office of Nuclear Reactor Regulation
Shared Package
ML17254A690	List: ML17254A689 ML17254A691
References
RTR-NUREG-CR-1582, RTR-NUREG-CR-1821 IEB-80-11, NUDOCS 8512310135
Download: ML17254A689 (4)

Text

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ACCESSION NBR: 8512310135 DOC. DATE: 85/12/19 NOTARIZED: NO DOCKET ¹ FACIL: 50-244 Robert Emmet Qinna Nuclear Planti Unit ii Rochester 0 05000244 AUTH. NANE AUTHOR AFFILIATION KOBER> R. M. 'ochester Qas 5 Electric Corp.

REC IP. NANE ProspectAFFILIATION RECIPIENT LEARA Q. E. PWR Directorate' SUB JECT: Forwards R562-N4i "Reinforced Nasonrg Mall Evaluate:one Evaluation of Control Bldg Reinforced Walls'" documenting results oF elastic LLI inelastic analyses %or selected masonry walls. Commitments re IE Bulletin 80-11 complete.

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ROCHESTER GAS AND ELECTRIC CORPORATION o 89 EAST AVENUE, ROCHESTER, N.K 14649-0001 ROGER W. KOBER VXE PRESIDENT TKLKPIIONK ElECTRIC & STCAM PROOVCTION ARK* COOK 7 I 0 546.2700 December 19, 1985 Director of Nuclear Reactor Regulation iDD: PWR' A/BC's ~fECH avrrvrrr Attention: t<r. George E. Lear, Chief PWR Project Directorate No. 1 AD J. Knight (ltr only)

U.S. Nuclear Regulatory Commission EB (BALLARD)

Washington, D.C. 20555 EICSB (ROSA)

PSB (GAMMILL)

RSB (BERLINGER)

Subject:

Seismic masonry Wall Analyses FOB (BENAROYA) .

R. E. Ginna Nuclear Power Plant Docket No. 50-244

Dear Mr. Lear:

In RG8E's letter of November 6, 1985 regarding seismic analysis of safety-related reinforced masonry block walls in the control building, RG&E committed to provide the final analytical results for these walls by December 20, 1985, Enclosed is Computech Report No. R562-N4, which documents the results of the elastic and inelastic analyses for selected masonry block walls at Ginna Station. These results indicate that there are significant margins of safety for all of the walls, as determined from the inelastic analyses of the selected "worst-case" walls. The margins of safety vary from between 76% for masonry strain ratios to 600'X for steel strain ratios. Thus, it their can be concluded that the reinforced block walls will be able to maintain, safety configuration following an SSE.

The seismic inputs used in these analyses were derived from the NRC "Senior Seismic Review Team" report, NUREG-CR/1821, as modified to correspond to the Ginna site-specific SSE ground response spectrum, as defined in NUREG/CR-1582, "Seismic Hazard Analysis", anchored at 0.17g. This spectrum was found acceptable for use in assessing safety margins for structures, systems and components at Ginna, as documented in the NRC Safety Evaluation Report for SEP Topic III-6, "Seismic Design Considerations", January 29, 1982.

A report documenting the Computech correlation study for San Onofre Nuclear Generating Station Unit No. 1 (SONGS-1) wall FB5, which was discussed with the NRC during a December 5, 1985 meeting, has also been prepared. Parts of that report are considered proprietary to Southern California Edison. That report will be submitted as soon as the appropriate application for withholding and affidavit are prepared. The submittal of these reports will conclude all RG&E seismic commitments resulting from IE Bulletin 80-11, "Masonry Wall Design".

V ry truly yours, 8512310135 851219 PDR 8

• DOGIE 00000244 PDR Ro+

0~0/ W. Kober

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