ML19261A250
| ML19261A250 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 10/30/1978 |
| From: | Dircks W NRC OFFICE OF THE EXECUTIVE DIRECTOR FOR OPERATIONS (EDO) |
| To: | Lagomarsino R HOUSE OF REP. |
| References | |
| NUDOCS 7811080032 | |
| Download: ML19261A250 (10) | |
Text
{{#Wiki_filter:f ry 1 s t ri u t i c;-i.w o u. en sos e. f ~ ed. n b ./ new FileQ/ M. Groff 007 3 0 $3 -RC PDR -E. Hughes - 71 mm m g-Local PDR J. F. Stolz. ,-,~ 0 b EDO Reading - D. P. Allison: ' J %( -NRR keacing _ E...G. dyitoF.j.. . w~--.. h.beHonorableRobertJ.Lagomarsino - LWR #1 File J. Yore,- ASLB :-:. X-H. R.1Denton. IE (3) - " :=.C2- . " E.- ~ United States House of Representatives E. G.-Case SECY Mail Facility (3)'2 . Washington, D. C. 20515.?';. R. S. Boyd. ' . D.- F. Bunch - ).e. ELD. . R. D. Ma tts o.n +. - ~ ~~ CA -{-3 ) R. DeYoung. -
Dear Gongressman Lagwarsino:
I an pleased to respond to your letter of August 31,197) V. Stello G. Ertter (#4637 3 to the Secretary of.the Department of Energy. _ You enclosed a letter from your constituent, Andrea Lee.Munson, ..: 2-and requested information about her concerns. In a letter. dated. :- 4 _.. _,... September 25, 1978, the Department of Energy responced concerning ; *.g. -{ ~ radioactive waste disposal and requested that the Nuclear Regulatoryy J. ~ Comission (NRC) provide you with comments concerning the Diablo i, ~ Canyon buclear Power Plant. Our coments are provided below. Ms. Munson indicated that the plant was approved for operation and f-lies directly over a major earthquake fault.- Operation of th'e plant J -1 c nas not been approved and the matter is still under review by~the NRC. The plant is not. located on any known capable fault. I t i s -- located about 3 1/2 miles from the offshore Hosgri fault which beca:ae known publicly after plant construction-began. The current issue in the Comission's review of the matter is whether the plant, J after appropriate modifications, is designed to safely withstand., cround motions that could result from an earthquake on the Hosgri ~ t fault. A brief sumary of the history and status of this review is provided in the enclosure. "s. Hunson also indicated that Jack Anderson has written articles on " prominent scientists who have warned of this nuclear hazard, and lost their jobs as a result." We are not aware of anyone losing his job as a result of criticizing the Diablo Canyon plant nor are we etare of any articles by Jack Anderson stating this has happened. Jack Anderson's column of January 27, 1977 indicated that the plant had been criticized, unich it had been, but not that the critics had lost their jobs. I trust you will find this information responsive to your request. Sincerely, (sine h k 7[b [ 83 m {]_ -Vini m J. h e d k w3 bR e l i QPtn,WR:AD OELD M 'g;TgK 'R % EDO EGb?se br$enton LVGossick DEVassa110
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if k V [ ENCLOSURE SU:'lATu D7/MO CP vCt ri"1 pTE2 TL;.*:T Constructicr. permits for Units 1 ar.d 2 of the Diablo Canyon t;uclear Plant, located on the California coast about 12 miles from San Luis Obispo, were issued in 1968 and 1970 respectively. In addition to the AEC review of the croposed site, independent rcviews were per-formed for the AEC by the U. S. Geological Survey and the U. S. Coast and Geodetic Survey. Based on these investigations, the units were designed and constructed to withstand the maximum earthquake potential identified for the site at that time (0.49 horizontal acceleration). In 1971, the existence of a fault--now known as the Hosgri Fault--passing about 3.5.. miles offshore from the plant site came to light. When appli-cation to the AEC (now tiRC) for an cperating license was made in 1973, detailed invostigation of the H :;gri rault began, leading to a conclusion by the NRC and the U. S. Geological Survey that the maximum potential earthquake ground motion et the proposed site "may be more severe than that for which the plant had been originally designed." A magnitude 7.5 earthquake on the Hosgri fault was assumed for the purpose of design. Thus, in April of 1976, the applicant for an operating license--the Pacific Gas and Electric Company--was advised that the piant's seismic capabilities sh'ould be reanalyzed "to determine what modifications would be necessary to withstand the more severe ground motion (0.75g)" predicated on the existence of the offshore fault. As of October 1978 the applicant has cogleted most of the analysis work and plans to complete the extensife abdifications for Unit I about the end of 1978. The Advisory Committee on Reactor Safeguards completed its review in July 1978. Public hearings before the Atomic Safety and Licensing Board are scheduled to resume in December 1978 to consider seismic design issues and a decision on the operating license application is expected in the Spring of 1979. ~ D'] l} D 2158 203 ' " ' h mM MMM M d 4 JeA j ~g ,g' [ M-I de*e "W 84p> 4 dhed ab hbed.W hge M - a}}