ML20198G469

Forwards List of Outstanding Issues Re RESAR-3,Section 3.7, Seismic Design. Amended Section Lacks Clear Intent of Compliance W/Nrc Position

ML20198G469
Person / Time
Site:	Satsop
Issue date:	03/13/1975
From:	Maccary R Office of Nuclear Reactor Regulation
To:	Deyoung R Office of Nuclear Reactor Regulation
References
CON-WNP-1311 NUDOCS 8605290610
Download: ML20198G469 (4)

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p NRR-Rdg Docket ilo. F-SIN-WS SES-Rdg t W ,< 3 3 g 3 R. C. Devour.g. Assistant Director for Light !!a tor Rcactors, Group 1 Division of Reactor Licensing RESAR, REVISIO" 3 (RESAR-3)

In cccordance uit.h your requ2st of f*, arch S.1975 to identify j unacceptabic sections of 11ESAR-3, the Structural Enqineering Cranch has u,Watad the revieu of S2ction 3.7 " Seismic Dasign" of RCSAR-3 including the proposed Scction 3.7 /condmnt to the Consolidated Version of RESAR-3 dated September 30, 1974.

1.'o had a naeting on July 19. 1974 with !!estinchouse to discuss dnft qeestions en Section 3.7. l'ast of the cuastions of the draf t list were 1: tar asked fornally in a letter. (Vassallo to Salvatori. August 3,1974). As a ra: ult of this n:eting, it was tha staff's it.'prassion that IMstinoeure would con?ly with esca of tha positions discuss 2d exce,)t cr,a ca cosination of nodes j uitn closely . raced frmuenciss. In reviewing the proposed I tacti m ^ ..7 f.m,idv n t rif Sve-h.sr 2n. I n74. hecov.'r. un finct that a clear intcat of coupliance with cur positions is lacking ar.d a restitanant of unresolved itmas is necessary. Enclosed is a list of such cutstanding issu2s.

R. R. !becary Assistant Director for Engineering

> Divisica of Technical Review

Enclosure:

List of Outstanding Issues cc v/o encl: cc w/ encl:

A. Glanhusso S. ihnauar L. C. Shao

!!. I!cD:nald F. Schroeder C. P. Tan i D. Vassallo D. C. Jer.g it. Aycock S. P. CSan

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9 MAR 13 li/5 LIST OF OUTSTANDING ISSUES OF RESAR-3

1. Design criteria to account for relative displacemer+s between component support points. (Formerly Question 3.13)

2. Combining modal responses for modes having closely spaced frequencies to each other. (Formerly Question 3.16)

3. Definition of "o " to reflect the meaning of maximum response 4

due to i-th direbkion input and a statement to indicate statistical independence of three directional inputs. (Formerly Question 3.18)

4. Design criteria to account for relative displacements between 1

piping support points. (Formerly Question 3.19)

5. Pertinent data for concluding that the known variation in properties of components and systems does not account for any measurable or significant shift in period or increase in seismic loads. (Formerly Question 3.20)

6. Damping values for the control rod drive nachanisms and the fuel i

assemblies. (Formerly Question 3.22) l

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• UNITED STATES NUCLEAR REGULATORY COMMisslON W ACHINGTON, D. C. 20555 Docket flo. P-STN-508 l MAR 131976 l

R. C. DeYoung, Assistant Director for Light Water Reactors, Group 1 j

Division of Reactor Licensing RESAR, REVISION 3(RESAR-3)

In accordance with your request of March 5,1975 to identify unacceptable sections of RESAR-3, the Structural Engineering Branch has updated the review of Section 3.7 " Seismic Design" of RESAR-3, including the proposed Section 3.7 Amendment to the Consolidated Version of RESAR-3 dated September 30, 1974.

We had a meeting on July 19, 1974 with Westinghouse to discuss draf t questions on Section- 3.7. Most of the questions of the draft list were later asked formally in a letter. (Vassallo to i

Salvatori, August 8,1974). As a result of this meeting, it was the staff's impression that Westinghouse would comply with each of the positions discussed except one on combination of modes with closely spaced frequencies. In reviewing the proposed Sccticr. 3.7 Amor.dscr.t of September 20, 1971, her:cvor, we fi :d that a clear intent of compliance with our positions is lacking and a restatement of unresolved items is necessary. Enclosed is a list of such outstanding issues.

o c. W R. R. Maccary, Assistant Director for Engineering Division of Technical Review

Enclosure:

List of Outstanding Issues cc w/o encl: cc w/ encl:

A. Giambusso S. Hanauer L. C. Shao W. Mcdonald F. Schroeder C. P. Tan D. Vassallo D. C. Jeng M. Aycock S. P. Chan ,

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, MAR 131375 LIST OF OUTSTA;!DIf1G ISSUES OF RESAR-3

1. Design criteria to account for relative displacements between component support points. (Formerly Question 3.13)

2. Combining modal responses for modes having closely spaced frequencies to each other. (Formerly Question 3.16) j 3'. Definition of "o ." to reflect the meaning of maximum response due to 1-th direNion input and a statement to indicate statistical independence of three direct-ional inputs. (Fomerly Question 3.18)

4. Design criteria to account for relative displacements between piping support points. (Formerly Question 3.19) i 1 5. Pertinent data for concluding that the known variation in properties of components and systems does not account for any measurable or significant shift in period or increase in seismic }

loads. (Formerly Question 3.20)

, 6. Damping values for the control rod drive mechanisms and the fuel assemblies. (Formerly Question 3.22)

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