Docket Nos. 50-275and 50-323 M5 6 Bi'~

Dear Mr. Lagomarsino:

Honorable Robert J. LagomarsinoU. S. House of Representatives

DistributioniDocket File

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Your letter of October 22, 1975 to the U. S. Energy Research andDevelopment Administration, which forvaxded cha September 24 letter ofyour constituent,, Mr. DeVincenzo, has been referred to me and I am

pleased to respond.

Mr. DeVincenzo asked several questions concerning the Diablo CanyonNuclear Power Plant. Pacific Gas and Electric Company hae nearlycompleted construction of UniC 1 at the Diablo Canyon site, about 12mQ.es from San Luis Obispo, California. Construction of Unit 2 at thissite is= more than half completed. Construction Permits for these unitswere granted in 1968 and 1970, respectively. The Nuclear RegulatoryCommission's staff ie currently reviewing the Company's application forOperating Licenses for these unites Our responses to Mr. DeVincenzo'squestions, based on the staff's review to date, are given balov.

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Mr. DeVincenzo asked how far the radiation vould go if chere were anearthquake and the plant should explode. As with other commercialnuclear power plants, wa requix'e that the Diablo Canyon Plant ba designedto safely vithstand severe earthquakes so that an earthquake cannot beexpected to causa a release of significant amounts of radioactivity.Also, it is impossible for nuclear power plants to explode like a nuclearweapon. Hovever, we do evaluate, in a conservative manner, the potentialconsequences of postulated accidents, such as ruptures of reactorcoolanC pipes, which could release radioactivity. Although thesepostulated accidents are very unlikely, safety features are provided inthe plant to cope with them and to limit the amount of radioactivity thatwould ba released to acceptable levels as defined in 10 CFR Part 100, theNuclear Regulatory Commission's "Reactor Sate Criteria" (a copy of vhichis enclosed).

Mr. DeVincenzo asked where the radioactive wastes would ba buried. Tharadioactive wastes created by plant operation willnltinataly be shippedto government facilities for disposal. Some of these wastes, primarilylov level vastes, may be buried at approved burial sites; Others,which are primarily the highly concentrated and long lived radioacCivawastes that will result from the reprocessing of used nuclear fue1, will

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be stored to await final disposal. Tho specific method for final disposalof these highly concentrated vastes has aot yet, been selected. Howovox,the present storage methods are considered to be safe aad evaluations ofmethods suitable for the'ery long term are being conducted.

Hr.'oVincenzo suggested that the risks of having tho plant close byshould be borne by people living at another location if those peoplewant the electric power. Of course, ve wi11 not allov operation of the.plant unless ve can determine that such operation is safe. Hovovex, thissafety determination is independent of what segment of the populationlives near the plant and of the exteat, to which persons living near theplant utilize its elcctrica1 output. Nevertheless't is also worth notingthat the Diablo Canyoa site, is vaU. vithin Pacific Gas and ElectricCompany's service area, vhich covers most of Central an>I NorthernCalifornia.

Hr. DeVinccnzo ashsd if there is any vay to stop the constructioa. TheCommission's staff does not have any xeason at, this time for stopping

'onstruction. Tho Atomic Safety 'and Liceasiag Hoard is expected to beginpublic hearings near the plant site within the next fev months toconsider the issuance of Operating Licenses for the Mablo Canyoa Plant.Members of the public may,-at the discretion of the presiding officer,participate in tho hearings by making licdtod appearances. A personmaking a limited appearance may state his position aad may also raise'questions which he vould 1Qce answered. If tho questions are relevant tothe proceeding, the presiding officer may direct that they be aaswerod by

~ tho parties. A member of tho public may, alternately, petition for leaveto intervene. If the petition vere allowed he could become a pazty andparticipate more fully in the proceeding (including.introducing motions,presenting'evidence and cross maunining witnesses).. Howevers sinco thodeadline for such petitions vas November 19, 1973 for tlio'ablo CanyonPlant, such a petitioa would nov need to make a substantial showiag ofgood cause for late filing in order to 'be granted. The standards againstvhich a late petition vous,d be fudged are sot, forth ia Section 2.714 of10 CPR Part 2, tho Nuclear Regulatory Commission's "Rules of Practica"(a copy of which is enclosed) ~ If Hr. DoViaceazo should wish toparticipate in tho proceedings, either by a limited, appearance or bypetitioning for leave to intervene, he should follow tho procedures inthe enclosed Federal Register Notitco. Ho should substitute NuclearRegulatory Commissioa, Washington, D. C. 20555 for Atomic Energy Commissionin tho addresses given in the Notice.

Finally, ?|r. DeVincoazo asked about the number of units planned anddiscussed the temptation for sabotage. LTo have reviewed Pacific Gas andElectric Company's proposed measures to protect tho Diablo Canyoa Plant

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against sabotage and have found them acceptable. Nevertheless, inresponse to fair. DeVincenso's specific -question, the Company has onlyapplied to build the two units discussed above at the Diablo Canyonsite. late are not avare of any plans to build additional units at ornear this sita. Tn addition, these two units would be a small fraction

.og the Company's tota1 generating capacity and the electrical grid couldwithstand a loss of one or both of these units (since they may beunexpectedly lost for other reasons such as automatic plant shutdown ortransmission line interruptions)

T trust that you wi11 find this information responsive to Mr. DeVincemo'squestions.

Sincerely,

%'illiam J Dircks2hsistant E'.~ocutive Director

for Ogorations

Enclosures:1. Code of Federal Regulations 10,

Energy, Parts 0 to 1992. Pederal Register Notice of

October 197'- 197>I., concerningDiablo Canyon, 38 FR 29105

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UNITED STATES

ENE RESEARCH AND DEVELOPMENT AD .IISTRATlON

VIASHINGTON, D.C. 20545

HOY 11 1975

Mr. Carlton Earmerer, DirectorOffice of Congressional AffairsNuclear Regulatory Cannission1717 H Street, Ã0.Nashington, D.C. 20555

Dear Mr. Kamerer:

Enclosed is correspondence from Representative Robert J. Laganarsinodated October 22, 1975, regarding an inquiry frcm his constituent,Mr. John DeVincenzo.

Since the nature of this inquixy relates to the activities ofthe'uclearRegulatory Com6ssion rather than the'nexgy Research and

Development Administration, it is requested that proper action betaken by your office.

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be are, advising Representative Lagomarsino of this referral by copyof this letter.

~iH. Hollister Cantus, DirectorOffice of Congressional Relations

Enclosure:As stated

cc Representative Robert J. Lagomarsino

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COMMITTCC ONINTERNATIONALRELATIONS

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October 22, 1:)7~

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Dr. I";icllard C, SeaIaansAdministratorLncr< y Pes 'arch and Developmellt Administration'»as!linl,ton, I). C".

i)ear i,r. Seamans:

Lnclos d is a self-ex„llanai'or> letter from myconstituent, Jo'nn DeVincenzo, regarding 'lis concernover t!.e sa.et>'eatures of I)labia Canyon I"uclearPower Plant. (

I wollld aI)preci;lt'e !('Oul lttelltlon to tllc (Iues-tions ra'ised by IIr, I)e'Itincenzo. Pl'eas keep me in-formed,

Sincerely,„ /<')

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.:!ember of(Con<(ress'!

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NUCLEAR REGULATORY COMMISSIONWASHINGTON, D. C. 20555

>ED 3 1975

Mr. Lee V. Gossick, Executive Director for Operations

LATE RESPONSE TO CONGRESSIONAL MAIL

The response to Representative Lagomarsino's letter concerning hisconstituent, Mr. DeVincenzo, is late because I postponed writing ituntil the last minute.

At the time the letter was received I was quite busy, primarily withmatters related to the recent serious schedule slip on Diablo Canyon.In addition, I underestimated the time needed for processing bythinking in terms of the simple green ticket letters which the branchchief signs. Of course, once I wrote it, all parties cooperated andtyped it and concurred very quick1y.

~ ~D. P. AllisonLight Water Reactors

Project Branch 1-3Division of Reactor Licensing

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UNITED STATES

~,- ENERGY"RESEARCH 'AND DEVELOPMENT ADMINISTRATION;.,WASHINGTON, D.C. 20545

NOV 11 875

Mr. Carlton EaraIerer, DirectorOffice of Congressional AffairsNuclear Regulatoxy Cmmission1717 H Street, 1W.Washington, D.C. 20555

Dear Mr. Karmerer:

Enclosed is correspondence fram Representative Robert J. Lagomarsinodated October 22, 1975, regarding an inquixy from his constituent,.Mr. John DeVincenzo.

Since the nature of this inquixy relates to the activities of theNuclear Regulatory Comtu.ssion rather than the Energy Research andDevelopment Administration, it, is requested that proper action betaken by your office.

II

We are advising Representative Lagomarsino of this referral'y copy .

of this letter.

Sincerely, /

C"H. Hollister Cantus, DirectorOffice of Congre seconal Relations

Enclosure:As stated

cc: Representative Robert J. Lagcmarsino

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COMMITTEEONINTERNATIONALRELATIONS

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SCIENTIFIC AFFAIRS

COMMITTEEONINTERIOR AND INSuLAR

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SUOCOMMITTECSt

NATIONALPARKS AND RECREATIONTERRITORIALAND INSULARAFFAIRS

October 22, 1375

Dr. Ricltard C. SeamansAdministratorEnergy Researcn and Development Administration'washington, D.C.

Dear Dr. Seamans:

Enclosed is a self-explanatory letter from myconstituent, Jo»n DeVincenzo, regarding his concernover the 'safety features of Diablo Canyon NuclearPower Plant.

I »ould appreciate your attention to the ques-tions raised by fjr. DeVincenzo. Please keep me in-formed.

I~QiBERT . AGOI XR

member of (ongressI

RJL: jbEncls.

THIS STATIONERY PRINTED ON PAPER MADE WITH RECYCLED FIBERS

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