ML20147C816

Summarizes 770831 Briefing on Gen Elec'S Phase I Geological Investigation Which Presented a New Map of Livermore Valley & Interpreted the Geology & Seismology of Area Around Greenville & Las Positas Faults

ML20147C816
Person / Time
Site:	Vallecitos File:GEH Hitachi icon.png
Issue date:	09/15/1977
From:	Burger A Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 7812180414
Download: ML20147C816 (4)

Text

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UNITED STATES 5 .

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3* 't NUCLEAR REGULATORY COMMIS$10N '

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• j WASHINGTON, D C.20666 SEP 151977

DOCKET N0. 50-70 <

LICENSEE: General Electric Company (GE)

FACILITY: General Electric Test Reactor (GETR)

SUMMARY

OF MEETING HELD ON AUGUST 31, 1977, BRIEFING ON GE'S PHASE I -

GEOLOGICAL INVESTIGATION h

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On August 31, 1977, NRC staff, representatives of GE and its consultants Engineering Decision Analysis Company (EDAC) and Earch Sciences Associates

- (ESA), attended a presentation by Dr. D. C. Herd, U.S. Geological Survey (USGS), at the USGS offices at Menlo Park, California. Dr. Herd presented a new map of the Livermore Valley, California, and provided an interpretation

of the geology and seismology of the area which included the Las Positas i and Greenville faults. Also, the new map shows the Verona fault to be closer to the GETR than had been assumed in the past. (The infonnation presented by Dr. Herd including the new map have since been published in the USGS open file report #77-689).

! Following Dr. Herd's presentation the NRC staff and GE representatives

! held a separate meeting during which GE presented the scope of the

initial phase, Phase 1. of an ongoing licensee pmgram of geological investigation of the GETR site. A list of attendees is attached. This program was. initiated as a result of the staff's comments during the previous August 3,1977 meeting in connection with GE's license renewal application for the GETR (reported in our summary of that meeting [dlited September 15 , 1977). The program outline is given in GE's handout

, provided during the meeting (copy attached). GE stated that Phase I of the pmgram will include an area of about five miles out from the GETR 1 site and work will also concentrate on the Verona fault. GE indicated l that the Phase I work would be completed in about 90 days. It was also tentatively agreed that a site visit would be held the week of September 25,

1977, to discuss progress on the Phase I work.

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> Alfrell Burger, Projec Manager Operating Reactors Branch #1 Division of Operating Reactors

Enclosures:

- 1. List of Attendees

2. 'GE's Handout cc w/ enc 1: See next page f

781318D M

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Meeting Summary for SEP 15 G77 General Electric Company Docket NRC PDR LOCAL PDR ORB #1 Reading  !

NRR Reading E. G. Case V. Stello K. R. Goller D. Eisenhut A. Schwencer i D. Davis G. Lear l R. Reid L. Shao B. Grimes W. Butler R. Baer Project Manager Attorney, OELD Ol&E (3)

Licensing Assistant Each NRC participant T. B. Abernathy J. R. Buchanan 1

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LIST OF ATTENDEES MEETING AT MENLO PARK AUGUST 31, 1977 NRC A. Schwencer A. Burger C. Stepp H. E. Lefevre R. B. Hofman J. Kellerher R. Kratzge-S. Wastler NRC - IE Region V R. T. Dodds j J. G. Henchett I

G. E.

D. L. Gilliland G. D. Hoggatt N. F. Fifer R. L. Sharpe - EDAC J. Reed - EDAC P. H. Hamilton - ESA R. H. Wright - ESA

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SEP 151977

m . ._ GETR LICENSE RENEWAL - PHASE I i

GEOLOGICAL INVESTIGATION

1. Literature Search - Reviewinofthe fault hazards all area available data published including on the geology and reports and interviews with USGS personnel and private consultants recently or currently working in the area.

2. Photogeologic Analyses - Study of stereo paired aerial photographs, including color infrared photos, to determine surface geologic conditions and identify lineations.

3. Geologic Mappi_ng n - SJrface mapping to provide on-ground checks of features delineated by air photo interpretation and descriptions of stratigrar :y and lithology, search for datable horizons to assist in assessment of age of faulting, and provide a preliminary assessment of foundation conditions at the site.

4. Subsurface Exploration _ - Limited trenching of lineaments closest tc the site to assess their characteristics and determine the feasibility of evaluating their hazard potential .

5. Development of Scope of Phase II Program - Based on results

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of the Phase I investigation, a detailed scope of work for more extensive explorations of critical features will be developed. The Phase 11 program will probably include additional trenching, exploratory borings, geophysical exploration, and testing of foundation materials.

6. Prepare se I Report - A report will be prepared to present the rest. .k of Phase I, including appropriate maps, cross sections and other illustrations.

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