ML20210S516
| ML20210S516 | |
| Person / Time | |
|---|---|
| Site: | Washington Public Power Supply System |
| Issue date: | 06/07/1977 |
| From: | Stepp J Office of Nuclear Reactor Regulation |
| To: | Gammill W Office of Nuclear Reactor Regulation |
| References | |
| CON-WNP-1408 NUDOCS 8605290235 | |
| Download: ML20210S516 (3) | |
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!"'i ; my MEMDRANDUM POR: William P. Gauss 111. Assistant tirector for Site Technology. DSE PMDM: J. Carl Stepp. Chief. Geosciences Bransh. D5E
$UBJECT: IEETING WITH WASHINGTON PUBLIC POWER SUPPLY SYSTEMS (WPPS$) ON THEIR UNIT NO. 4 -gp A meeting was held on h 25. 1977 at the Greenuood Inn. Olympia, Washington among NRC staff the USGS and the Washington Public Power Supply System and consultants. A list of attendees is attached.
P The meeting was opened by Carl Stepp with a review of the status of the '
WPf'SS No. 4 review and a clarification of the NRC request for infbruntion concerning the potential impact of the 1872 earthquake on the seismic design basis for the unit. David T111 son susuarized the applicant's ,
activities related to the 1872 earthquake as follows:
The applicant has assimilated additional data and interpretations related to the 1872 earthquake. This information will be submitted '
to the NRC in a report about June 16. and will place the utility's interpretation of the 1872 earthquake on record. The utility is also conducting an extensive investigation to assess the impact of the 1872 earthquake on the seismic design basis for the WPPSS No. 4
- plant. This material will be submitted in a report to the NRC '
about August 15. The report will contain geological. geophysical and tectonic investigations within a region between 45' N latitude and 510 N latitude and 1180 W longitude and 1220 W longitude. The -
report will contain the results of a remote sensing investigation ;
(1) a compilation of geoloolc inap infonnation from both published and unpublished soure,es; (2) a physiographic map; (3) a tectonic maps and (4) a seismotectonic map of the region. A four station array '
of microsarthquake recorders is being operated in the vicinity of the epicenter of the 1872 earthquake as determined by Milee this infer- $
motion together with the historic seismicity of the region will bosome a part of the report. -
A samunary of the status of the various elements of the investigation was given by the WPP55 consultants. ,
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t After a caucus we responded to the merk diesmaned by the IPPSS as follows:
- 1. They should submit their infomation on the 1872 earthquake.
- 2. With respect to W regional testesia studies, we sueca ted that the report should faclude a disassales of the relatieash*p heteen structures outside the Colusia p)atoes region and theae within the Columbia plateau region and a discussion of the erstenic significance of W veleenic history of that region.
- 3. The seismogenic properties of the ltattissnah Ida11mit structm should be reconsidered in view sf the 1872 parthguske data and the seismicity studies should include any infermation ayallable on focal mechanism.
Orlam ! g,w_ y I., W. H;'br J. Carl Stepp. Chief Geosciences Srsach Division of Site Safety and Envfronnental Analys1s Attachment '
Cc: R. Boyd R. DeYoung H. Denton D. Muller W, flamill :
R. Hofmann J. Stepp OISTRIBUTI0fl: !
D. Budge CENTRAL FILE J. Kelleher NRR READING T. Cox DSE 4 FADING J. Devine GB FEADING R. Itorris S. Brockman 5
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-. 1;77 llashington Public Power Supp'y System Unit flo. 4 May 25, 1977 fluclear Regulatory Conmission Carl Stepp Dave Budge John Kelleher USGS W. H. Hays Robert H. llorris James F. Devine Stan Brockman
!_loodward-Clyde Consultants Don Tocher lleston Geophysical Dick Holt V. J. Murphy Consultant UE&C_
Howard A. Coombs WPPSS William Kiel David Tillson Ron Chitwood Alan Hosler Shannon A Wilson, Inc.
H. H. Waldron