ML19262A139

Discusses Velocity Discrepancies of Fairfied Industries,Inc & Rj Wold Calculations of Depths of Rocktop & Subrock Reflectors in Eastern Lake Mi Faulting Studies.Changes Should Not Affect Basic Conclusions of Psar.Svc List Encl

ML19262A139
Person / Time
Site:	05000502
Issue date:	09/17/1979
From:	Fay C WISCONSIN ELECTRIC POWER CO.
To:	Harold Denton, Parr O Office of Nuclear Reactor Regulation
References
NUDOCS 7910260421
Download: ML19262A139 (2)

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Ui3CCl?:ll0 ::!3CillC pc sa cc.*.!Pu r m w r.ucmc..: .'o. m mc. .wout. m snot Septencer 17, 1979 "r. i;crold R. Denton, Director Office of :,'uclear I:cactor Reculation U. S. NUCLEAR REGULATOR 7 CC"!:ISSIO:i Uashington, D. C. 20335

[\W S 4 2 s Attenticn: isc. Olan D. Parr, Chief fh gh7 e Operating P.eactors Branch No. 3 ,

h t3 CCCKET i;0. ST'l 50-E 3 g c$ @',?b H.A'.Ei: iiuLL. M ius.dT LAKE MICH tGAN Gc0NisiCAL SURVEYS w / bi1 Appendix 2Q of the Haven Site Addendum to the Preliminary Safety Analysis Report contains an Engineering Gaophysical Report descrioing studies and analyses done by Fairfield Iruustries, Inc. with regard to i.he presence or absence of faulting in Lake Ilichigan necr the eastern shore. As part of these studies, mcps of the top of rock and a subrock reflector were developed frca data taken during seismic surveys by converting time intervals to depth using the velocity of sound in water, sedimants and r,ock.

. This report was made available tc Dr. R. J. Hold of the U. S. Geological Survey ia cor.nectica with his studies of other Lake ilichigan . data. As a result of his review, Dr. '.;cid has questioned the veiccities used to. calculate th2 depths of the top of rock and subrock refisctors and believes the mcppcd surfcces cay be too deep. Subsequent review by our consultants has confirmed Dr. Uold's observations. It is believed that the top of rock and the suorock reflector ny be about 75 to ISO feet and 200 feet higher, respectively, than indicated in Appendix 2Q.

Uhlle these velocity discrepancies may change the indicated depths to the top of rock and reflector surfaces, Dr. Wold and our consultants are in agreement that the changes should not affect the basic ccnclusicns of the report.

Revised maps will be obtained and the Site Addendum will be amended to incorprate the revised information at an appropriate time. Should you have questions, please contact us.

Very truly ours,

/.'. ,y 0

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Fay,' O.i ector C. '!.

Ccpy to Service List 1917 156 P00RBR M

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, , S UNITED STATES OF AMERICA M" p7 A NUCLEAR REGULATORY COMMISSION y2 I'

O cfri g,bgi 9 Before the Atomic Safety and Licensino Board 6 th In the Matter of / #c 8 "

WISCONSIf1 ELECTRIC POWER ) Docket No. STN 50-502 COMPANY, ET AL.

Haven Nuclear Plant )

SERVICE LIST Chaiman Robert H. Gorske Esq.

Atomic Safety and Licensing, Board Wisconsin Electric Pcwer Company U. S. Nuclear Regulatory Commission 231 West Michigan Street Washington, D. C. 20555 Milwaukee, Wisconsin 53201 Mr. Glenn 0. Bright Mr. Sol Burstein Atomic Safety and Licensing Board Executive Vice President U. S. Nuclear Regulatory Commission Wisconsin Electric Power Company Washington, D. C. 20555 231 West Michigan Street Milwaukee, Wisconsin 53201 Dr. E. Leonard Cheatum Route #3 Mr. William Charles Hanley Box 350-A President .

Watkinsville, Georgia 30577 Safe Haven Ltd. 4 P. O. Box 40 Steven C. Ggidberg, Esq. Kohler, Wisconsin 53044 Office of the Executive Legal Director David E. Beckwith, Esq.

U. S. Nuclear Regulatory Comission Foley & Lardner Washington, D. C. 20555 First Wisconsin Center 777 E. Wisconsin Avenue Docketing and Service Section Milwaukee, Wisconsin 53202 Office of the Secretary U. S. Nuclear Regulatory Commissicn Mr. Richard W. Henneger Washington, D. C. 20555 Bureau of Legal Services Department of Natural Resources Thomas A. Lockyear, Esq. Box 7921 Assistant Chief Counsel Madison, Wisconsin 53707 Public Service Comission of Wisconsin Hill Farms State Office Building Madison, Wisconsin 53702 Gerald Charnoff, Esq. j ') 1 / j}/

Shaw, Pittman, Potts & Trowbridge '

1800 M Street, N.W.

Washington, D. C. 20035 P00R ORIG %L

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