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Forwards Site Analysis Branch Site Suitability Statements on Facility Site.Satsop Area Suitable as Nuclear Power Site
	ML20210T372
Person / Time
Site:	Satsop
Issue date:	05/28/1975
From:	Harold Denton; Office of Nuclear Reactor Regulation
To:	Deyoung R; Office of Nuclear Reactor Regulation
References
	CON-WNP-1780 NUDOCS 8605300091
	Download: ML20210T372 (5)
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UNITED STATES NUCLEAR REGULATORY COMMISSION W ASHINGTON, D. C. 20555 MAY 2 8 575 R. C. DeYoung, Assistant Director for LURs, Group 1, L SITE SUITABILITY PLANT NAME: Washington Public Power Supply System Nuclear Projects 3/5 LICENSING STAGE: CP DOCKET NOS: STN 508 and STN 50-509 RESPONSIBLE BRANCH: LUR l-3 j REQUESTED COMPLETION DATE: May 23, 1975 APPLICANT RESPONSE DATE NECESSARY FOR NEXT ACTION PLANNED ON PROJECT: NA DESCRIPTION OF RESPONSE: NA REVIEW STATUS: Site Suitability Input (Seismology, Geology & Foundation Engineering) - Complete

! Enclosed are site suitability statements on WPPSS Satsop Site, Units 1 and 2. These statements were prepared by D. R. Budge and J. C. Stepp of the Geology and Seismology Section, Site Analysis Branch, Reactor Regulations. With respect to these disciplines and as indicated on the enclosure, we find the Satsop area suitable as a nuclear poner site.

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SITE SUITABILITY - WPPSS 3 & 5 GEOLOGY, SEISMOLOGY, FOUNDATION ENGINEERING I. Geology The proposed Washington Public Power Supply System Nuclear Station Site is located in the Pacific Border Physiographic Province of Washington State. Specifically, the site area lies in the Chehalis Lowlands which comprises a physiographic zone separating the northern termination of the Oregon Coast Range from the Olympic Mountains.

The site and its environs are largely underlain by Cenozoic strata.

Igneous rocks of Mesozoic and Cenozoic age, however, are more abundant than either sedimentary or metamorphic ones throughout the region.

The nearest outcrops to the site of Mesozoic and Paleozoic rocks are found some miles to the north and northwest of the proposed plant area.

Lithologically, the Cenozoic strata consist predominantly of marine clastic sediments deposited on a basement of Eocene oceanic basalts.

At the proposed site, the power block's foundations will rest on massively

,. bedded sandstones of Miocene age.

i The pre-Cenozoic tectonic history of the site region is quite complex.

Later, during the Cenozoic, several orogenic periods caused folding and faulting of the older formed rocks and general uplift of the region.

The structural features that were formed from these orogenies, and the region, were subsequently eroded during the Quarternary to produce the present day topography. While it appears that the last cajor period of b -

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f deformation in the. region (Pliocene) ended in the Late Tertiary, evidence from Pleistocene deposits in the coastal areas west of the site, frob 1,100 year old fault dates in the Puget Sound area to the north and from three active stratovolcanoes in the central part of the state, show that tectonism continued through the Pleistocene and into the Recent.

Numerous faults of a generally northwest or northeast trend occur through-out the basaltic rocks of the region. Some of these faults displace Tertiary strata in the region.

Several significant faults (some with several thousand feet of displace-ment) in the site area can be associated by various means with deformations no younger in age than Late Tertiary and thus they'are not considered to be capable faults within.the meaning of Appendix A.

In sucnary, it can be said that while the geologic conditions of the Satsop site and its surrounding environs are very complex and the area is tectonically active, based on the applicant's work to date there are no apparent geologic problems that would preclude this site being suitable for a nuclear pcwer plant of the size and tfpe proposed.

II. Seismology Tectonically the Satsop site is on the southwest margin of the Puget Sound Ecbaycent seismic zone. The largest historical earthquakes in the site'

~. J region have occurred with that zone. These occurred in 1949 and 1965 and reached intensity VIII .(EN). Other plants of

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the size and type proposed for the Satsop site have been designed for earthquakes of this size. We conclude that there are no seismological considerations that would preclude the acceptability of the site for the proposed nuclear plant.

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, REVIEW STATUS: Site Suitability Input (SeismoloSy Geology'& Fouantation t' f _

Engineering) - Complete

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- Beelooed are site suitability statements on WFFSS Satsop Site, i Units 1 and 2. .These statements were ri_,1-." by D. R. Emdge and i - ,

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and as indicated am the emelosure,we find the Satsop aree suitable '

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~ % RESULTS OF SECGED ACCEPTANCE REVIEW OF THE CP APPLICATION JU L G FORWPPSS NUCr.mtAn PgCJECTS NO. 3 AND NO..E -

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Qa July 15,1974, Washlagten Phhlic PWwer Supply System (WPPSS) tendered

I a revised appliention consisting of the PSML and General and Financial -

l hformation for the WPPSS Noelear Project No. 3 and the WPPSS Nuclear

Firejset Neo 5 2ne111 ties. The retsudored PS&R has been revised to correct deneismeios in the areas of geology, seissiology, e==*=i====t systesnae, and

. eteatrical, instr ====*=*ia= and control systemas which were idenMfied daring

. Ihe stadFs aseeptemme review and docuumented la Emelosure No. I to our '

~ Apru 141914 letter to the applicant which rejected the applicatism. We

,. here reviewed the revised PS&R considering the areas identified as deScient. :

and have comenuded that the required informaties has been supplied and that -

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., the PS&Mris acceptable age docketing. In its May 30,1974 memo, the l Directorate of Regulatory Operations actifled as that, daring a fo!!awup l

inspectiam of the applicant's Gamlity Assurance Programa for WNP-3 and l WNP-5.14 was found that the applicant has satistnetoruy ecerected the _

previous wa=ei== reported in 20 Inspection Report No. 501/74-01.

i The applicant's inaplomaa=*=*ia= of the goality assarames program complies :i.

with the requirements of Appendix B to le CFR Part 50 and is consistant '

with the status of thsee projects. ..

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_~ _ Considering the above itemas, we rea=====d acceptanee of the WNP-3 jlg and WNP 5 PS&R for doekettag. -

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ML20210T372

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