ML20128D215

Board Notification 85-065:forwards Summary & Transcript of 850618 Meeting W/Util Re Reanalysis of rock-structure Interaction

ML20128D215
Person / Time
Site:	Comanche Peak
Issue date:	06/24/1985
From:	Noonan V Office of Nuclear Reactor Regulation
To:	Asselstine, Palladino, Roberts NRC COMMISSION (OCM)
Shared Package
ML20128D218	List: ML20128D215 ML20128D223 ML20128D243
References
CON-#385-605, TASK-AS, TASK-BN85-065, TASK-BN85-65 BN-85-065, BN-85-65, OL, NUDOCS 8507050058
Download: ML20128D215 (3)

Text

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[ g NUCLEAR REGULATORY COMMISSION 3 8 WASN1800 f ON, D, C. 20664

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Docket Nos.: 50-445 and 50-446 MEMORANDUM FOR: Chaiman Palladino Connissioner Roberts Connissioner Asselstine Commissioner Bernthal Connissioner Zech '

FROM: Vincent S. Nocnan Director of Comanche Peak Project Olvision of Licensing Office of Nuclear Reactor Regulation

SUBJECT:

80ARO NOTIFICATION -

SUMMARY

OF MEETING BETWEEN NRC STAFF AND TEXAS UTILITIES CONCERNING A REANALYSIS OF THE ROCK-STRUCTURE INTERACTION FOR COMANCHE PEAK

. (BOARD NOTIFICATION NO.85-065)

This Notification is being provided to the Connission in accordance with the revised Connission's notification policy of July 6,1984, to inform the Com-mission on all issues on the cases before the Connission.

On June 18, 1985, the NRC staff met with Texas Utilities to discuss the re-analysis of the rock-structure interaction for Comanche Peak. Texas Utilities has been working on this reanalysis for the purpose of assessing the seismic margin in the in-structure floor response spectra considering improvements in the technology that have occurred since the response spectra in the FSAR were developed. The meeting consisted of a presentation by Texas Utilities during which the staff and applicant discussed in detail the pros and cons of the methodology and engineering decisions used in the example reanalysis, and the impact on the licensing review of a submittal requesting acceptance of new design infomation. The staff cautioned the appitcant that should Texas Utili-ties make a submittal, it should be very clear on how they intend to use the results of the reanalysis.

0 850624 T 050 3

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At the close of the meeting. Texas Utilities advised they will evaluate whether a submittal requesting NRC acceptance of a reanalysis should or should not be made. If that decision is affirmative, they will further evaluate changes to their ongoing reanalysis model as discussed in the meeting.

A copy of the meeting summary and transcript is provided for your information.

The parties to the proceeding are being notified by copy of this memorandum.

. naf, Di ctor i for C che Pehk Project Division.of Licensing Office of Nuclear Reactor Regulation

Enclosure:

As stated cc: SECY(2)

OPE OGC E00 ACRS (10)

Parties to the proceeding See next page Peter B. Bloch Herbert Grossman Dr. Walter H. Jordan Dr. Kenneth A. McCollom i

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