ML20236B286

Responds to Constituent K Schulze Ltr Expressing Opinion That Plant Should Not Be Allowed to Operate.Hosgri Fault Under Investigation by Util,Usgs & Nrc.Util Performing Engineering Analysis

ML20236B286
Person / Time
Site:	Diablo Canyon, 05000000
Issue date:	03/22/1977
From:	Gossick L NRC OFFICE OF THE EXECUTIVE DIRECTOR FOR OPERATIONS (EDO)
To:	Nelson G SENATE
Shared Package
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References
FOIA-87-214 NUDOCS 8707290039
Download: ML20236B286 (3)

Text

e . - 1, Docket No. 50-275 ard 50-323 2

2 pp The Honorable Gaylord Nelson United States Senate Wasnington, D. C. 20510

Dear Senator Nelson:

I am pleaceo to respond to your transmittal daled February 23, 1977, forwarding a letter from Ms. Kathi Schulze of Wisconsin Rapids, Wisconsin.

Ms. Schulze referred to a recent newspaper article concerning the Diablo Canyon Nuclear Fower Plant and expressed an opinion that the plant should not be allowed to operate.

The Hoagri fault was discovered in 1971 close to the plant and has been the subject of investigation by Pacific Gas and Electric Company (PG6C),

the U. S. Geological Survey and the Nuclear Regulatory Commission (NBC) since 1973 when PG&C applied for an operating license.

Operation of the plant is being held up, at considerable cost, because the earthquake safety questions are not yet resolved. The first unit at this site was essentially completed early last year. It appears that operation will have been held up about 11/2 years before a decision on tne operating license can ce made. ,

i 1he plant is located 31/2 miles from the Hongri fault on a foundation j of cccpetent rocx. What we are ciealing witn here is a question of '

redesign and r. modification to withstand more severe ground shaking than was considered in tne original design. However, there is no reason to be concernoc aoout ground rupture at the, plant site due to an earthquake.

The NRC staff has called for an analysis to determine wnat changes may be necessary co that the plant can withstand a magnitude 7.5 earthquake l on the Hongri fault. 2his is a very severe earthquake design basis. I The plant's owner, Pacific Gas and Electric Company, is performing this =

engineering analysis. Rien the matter must be reviewed in turn by the NHC staff and by the independent Advisory Committee on Beactor Safeguards.

In the process, it will have been scrutinized by many competent geologists, seismologists and structural engineers, including independent consultants of national stature.

, Safety and LicensingFinally, Board at athe matter public willIt be hearing. considered is not known, at thisby the Ato j time, what the final decision will be. I l

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8707290039 870721 PDR FOIA CONNORB7-214 PDR

lhe donorable C.aylord telson -

2- j As you requested, tJais response is trade t.o you in duplicate and the orig-inal correspondence is returred. I trust you will find this information i responnive to your request.  :

iincerely, ,

(squo Lee v. Could j i

[ee V. Gossick {

Executive Director for Operationj Lnclosure:

Letter from Ms. Kathi Schul 2c DISTRIBUTION Docket Files NRC PDR y Local PDR ED0 Reading NRR Reading  :

LWR-#1 File B. C. Rusche  !

E. G. Case R. S. Boyd D. B. Vassallo i Attorney, ELD .

CA (3)

G.Ertter(01609)

M. Groff E. Hughes ,

L. Dreher J. Stolz -

D. Allison E. Hylton J. Yore, ASLB

• SEE PREVIOUS YELLOW FOR CONCURRENCES j[j3J - - m REWRITTEN PER E. CASE 3/16/77 y

, J. Miller H. Denton R. Heine an 9,D O e bec: Paci ic Gas & Electric Company *AD: LWR *0 ELD DBVassallo 3/ /77 3/ /77 o ,,, .

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'RC FORM 318 (9 76) NRCM 0240 W u. e. oovsRNMENT PRINTSNO OFFICEa 1978 - $34 634

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It is not k , at this timej whaj,.thgt_ final decision will be. her the %RCr r intiontr equireJhat} the plant beTdesigned .to s 7 i most . Vere e thquak that could De egaecfed td occur-aE the ite; , i at demons ated _ Lor $ operatWof the pla'ntTe permittecf. j j__..- - -- l As you requested, this response is made to you in duplicate and orig- i inal corres is returnod. I trust you will find this in rmation l responsive to your st. )

Sincerely,

/

Enclosures letter from Ms. Kathi Schult.e l Distribution, '

Docket Files i NRC PDR Local PDR ED0 Reading i NRR Reading l LWR 1 File ,,

B. C. Rusche ,

E. G. Case l R. S. Boyd l D. B. Vassallo l Attorney, ELD '

CA (3)

G. Ertter (o1609) .

M. Groff E. Hughes ,

L. Dreher J. Stolz D. Allison SEE PREVIOUS YELLOW FOR PREV 100S. CONCURRENCES.

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Hyl n g ASL

/ REWRITTEN PER OELD. \

IE (3) , i trry 9-c M ty J. iiill H. Den on LW OEL R. H neman DBVa 0 -

bec: Pacific Gas and Electric Compay _

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