ML17254A630

Lists Proposed Course of Action to Complete Required Seismic Analysis & Documentation of Reinforced Concrete Block Walls in Control Bldg as Defined in Response to IE Bulletin 80-11

ML17254A630
Person / Time
Site:	Ginna
Issue date:	11/06/1985
From:	Kober R ROCHESTER GAS & ELECTRIC CORP.
To:	Zwolinski J Office of Nuclear Reactor Regulation
References
IEB-80-11, NUDOCS 8511130179
Download: ML17254A630 (5)

Text

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ACCESSION.PIBR: 8511130175'OC.

DATE: 85/11/06 NOTARIZED:

NO FAC If<50-244 Robert Emmet Ginna Nuclear Plant'nit ii Rochester G

AUTH. NANE AUTHOR AFFILIATION KOBER i R. W.

Rochester Gas 8: Electric Corp.

REC IP. NANE REC IP IEM I AFFILIATION ZWOLINSKI>J. A.

Operating Reactors Branch 5

DOCKET 0 05000244

SUBJECT:

Lists proposed course of action to complete required seismic analysis 5 documentation of reinf orced concrete black tvalls in control bldg as defined in response to IE Bulletin 80-11.

DISTRIBUTION CODE:

• 001D COPIES RECEIVED: LTR + ENCL

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General Distribution NOTES:NRR/DL/SEP ice.

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$/E/EIIE///////IY'<itO Ni 85.:::: ROCHESTER GAS AND ELECTRIC CORPORATION o 89 EAST AVENUE, ROCHdSTER, N.Y. 14649-0001 ROGER W. KOBER VKE PRESIDENT ELECTRIC &STEAM PRODUCTION TELEPHONE AREA cooE TIE 546 2700 November 6I 1985 Director of Nuclear Reactor Regulation Attention: Mr. John A. Zwolinskii Chief Operating Reactors Branch No. 5 U.S. Nuclear Regulatory Commission Washingtoni D.C. 20555

Subject:

Safety-Related Masonry Block Walls R.

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

Dear Mr. Zwolinski:

In order to complete the required seismic analysis and documentation of the R. E. Ginna reinforced concrete block walls in the control buildingi as defined in our responses to IE Bulletin 80-11I RGSE proposes the following course of action:

1.

Perform a post-test analysis of San Onofre Nuclear Generation Station (SONGS) Unit I block wall FB5 using actual measured steel strength and actual input test motion.

The SONGS 1 analytical model will be modified to include multiple rebar segments.

Computed and measured steel and masonry strains and length of yielding rebar will then be compared.

This correlation will verify the acceptability of the Computech (CES) inelastic stress analysis methodology.

2.

The CES inelastic methodology will be used to analyze one spanning wall and one cantilever wall.

These representative walls will be selected as worst-case walls based on physical parameters and elastic stress analyses.

Inelastic analysis resultsT steel straini masonry strain and deflection will be compared to allowable values and quantitative margins will be demonstrated.

3.

Based on the above elastic and inelastic analysis results<

RGGE will assess the acceptability of the remaining reinforced walls in the control building.

The significant wall parameters>

seismic input motionsi wall types and dimensions>

material physical properties and elastic frequencies will be utilized in the assessment.

This evaluation will also include the results of the elastic plate theory vs.

one-way inelastic action for a typical cantilever walli to verify that the assumption of one-way action is conservative.

851ii30i79 85ii06 PDR ADOCK 05000244 8

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ROCHESTER GAS AND ELECTRIC ORP.

DATE November 6 I 1985 To Nr. John A. Zwolinski SHEET NO.

The elastic and inelastic analyses will be performed using seismic input parameters developed in the SEP programi as given in NUREG/CR-1821.

RGGE expects to submit all results to the NRC by December 20I 1985.

y truly yours>

Roger W. Kober