ML20136E621

Informs of Establishment of Seismic Design Margins Working Group to Plan & Coordinate Seismic Design Margin Study Activities in Response to ACRS Indicating Need for Increased Attention & Generic Studies Re Seismic Risk

ML20136E621
Person / Time
Issue date:	10/28/1983
From:	Knight J Office of Nuclear Reactor Regulation
To:	Vollmer R Office of Nuclear Reactor Regulation
Shared Package
ML20136A555	List: IA-85-363, Submits Topics for Discussion at Commission 830708 Meeting W/Acrs.Topics Include Seismic Design Margins ML20136A550 ML20136E176 ML20136E418 ML20136E423 ML20136E621 ML20136E929 ML20136F618 ML20137D336 ML20137D440 ML20137D455 ML20137D472 ML20137D477 ML20137D494 ML20137D511 ML20137D540 ML20137D551 ML20137D557 ML20137D562 ML20137D570 ML20137D576 ML20137D583 ML20137D588 ML20137D598 ML20137D601 ML20137D609 ML20137D616 ML20137D621 ML20137D627 ML20137D635 ML20137D641 ML20137D646 ML20137D652 ML20137D659 ML20137D665 ML20137D670 ML20137D849 ML20137D867 ML20137D881 ML20137D911 ML20137D924 ML20137D951 ML20137D978 ML20137E016 ML20137E026 ML20137E044 ML20137E056 ML20137E075 ML20137E098 ML20137E113 ... further results
References
FOIA-85-363 ACRS-GENERAL, NUDOCS 8311300128
Download: ML20136E621 (2)

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OCT 2 8 1983

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':7 2 A'd 11 17 MEMORANDUM FOR: Richard H. Vollmer, Director

,; e ,_ , %V,ision of Engineering, NRR FROM: .* c- JambsP. Knight,AssistantDirectorfor Components & Structures Engineering, DE

SUBJECT:

NRR TASK GROUP - QUANTIFICATION OF SEISMIC DESIGN MARGINS On January 11, 1983 the ACRS, in a letter to Chairman Palladino, indicated the need for increased attention to seismic risk and the need for generic studies relating to seismic risk. In response to a request for comments from Commissioner Ahearne, we indicated in an April 4,1983 from William Dircks that NRR would take the lead in planning and coordinating activities related to seismic design margin study programs.

Since April we have discussed this issue further with ACRS during OL review meetings for several sites. Due to the press of other activities, however, we have not made a concerted effort to develop a consolidated program in order to be responsive to the ACRS. The ACRS has called a meeting of its Extreme External Phenomena Subcommittee for December 8 and 9,1983 in San Francisco to discuss this issue and they anticipate active staff participation at that meeting. This issue has also been made a pi.rt of TAP A-41 and we have committed to provide a program plan in November.

In order to provide the necessary effort and focus for this activity, I an establishing a Seismic Design Margins Working Group. This group will be composed of one senior person from each of the branches under my

. supervision and one from DL. In addition, I request that Ted Sullivan also be assigned to assist in this activity. The group will coordinate with ORES as necessary and may solicit participr. tion of a liasion member from ORES. Because of his experience in dealing with the overall seismic risk question, I have designated Bob Jackson to serve as Chairman of the group. This effort will be assigned a high priority and I will appraise you of the staff resource requiremants after the group meets and assesses the situation.

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W2 8 1983 I trust that this approach meets your approval and the group will become active on November 1,1983.

JamesP.K,y_

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nigh Assistant Director for Components 4' Structures Engineering Division of Engineering Attachments:

As stated cc: w/ attachments H. Denton E. Case D. Eisenhut G. Arlatto F. Arsenault DL'AD's DE AD's DL BC's DE BC's k

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