e,)

MAR 15 1978

Docket Nos. 60-275and 50-323

t!EMORANDUN FOR: John F. Stolz, Chief, Light tdater Reactors Branch No. 1,DPER

FROM:

SUBJECT:

D. Allison, Project Manager, Light Mater Reactors BranchNo. 1, DPH

DIABLO CANYON SEISf!IC DESIGN ACRS CONSULTANT REPORTS

The attached reports have been received from ACRS cons'ultants concerningDiablo Canyon seismic design.

Or1glnal Sit!no~ %Ognnls p.Allison

D. Allison, Project f!anagerLight Mater Reactors Branch No. 1

Division of Project Management

Enclosures:As stated

cc: See page 2DistributionDocket FilesNRC PDR

Local PDRR. MattsonJ. P. KnightI. SihweilD. JengP. KuoR. LipinskiR. BosnakP. ChenE. SullivanH. DentonW. GammillJ. SteppL. Reiter

N. Newark — U of Ill.M. Hall - U of Ill.J. Devine - USGS

D. VassalloR. C. DeYoungR. S. BoydE. G. Case

..LllR~SURNAME%

DATE~

NRC FORM 518 (9.76) NRCM 0240 6 U. e. oovERMMEMT rRlMTlMoDrnccs >eTe eee~ee

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cc: Pacific Gas and Electric CompanyATTN: Hr. John C. Morrissey

Vice President 8 General Counsel77 Beale StreetSan Francisco, California 94106

Philip A ~ Crane, Jr., Esq.Pacific Gas and Electric Company77 Beale StreetSan Francisco, California 94106

Janice E. Kerr, Esq.California Public Utilities Commission350 HcAllister StreetSan Francisco, California 94102

Hr. Frederick Eissler, PresidentScenic Shovel ine Pre" ervati on

Conference, Inc.4623 More Mesa DriveSanta Barbara, California 93105

Hs. Elizabeth E. Apfelberg1415 CazaderoSan Lui s Obi spo, Cal i forni a 93401

Hs. Sandra A. Silver425 Luneta DriveSan. Luis Obispo, California 93401

Hr. Gordon A. Silver425 Luneta DriveSan Luis Obispo, California 93401

Paul C. Valentine, Esq.321 Lytton AvenuePalo Alto, California 94302

Yale I. Jones, Esq.100 Van Ness Avenue19th FloorSan Francisco, Califonria 94102

Hs. Raye Fleming1746 Chorro StreetSan Luis Obispo, California 93401

Hr. James 0. Schuyler, NuclearProjects Engineer

Pacific Gas and Electric Company77 Beale StreetSan Francisco, California 94106

Hr. W. C. GangloffWestinghouse Electric CorporationP. 0. Box 355Pittsburgh, Pennsylvania 15230

Brent Rushforth, Esq.Center for Law in the Public

Interest10203 Santa Monica BoulevardLos Angeles, California 90067

Arthur CD Gehr, Esq.Snell 5 Wilmer3100 Valley CenterPhoenix, Arizona 85073

Bruce Norton, Esq.3216 North 3rd StreetSuite 202Phoenix, Arizona 85012

Michael R. Klein, Esq.Wilmer, Cutler 5 Pickering1666 K Street, N ~ W.

Washington, D. C. 20006

David F. FleiscIlaker, Esq.1025 15th Street, N. W.

5th FloorWashington, D. C. 20005

Hr. R. C. Hartin, GeologistCalifornia Division of Hines and

Geology107 South BroadwayRoom 1063Los Angeles, California 90012

I

MERIT P. V/HITECONSULTING ENGINEER

WHATELY, MASSACHUSETTS Q1Q93

No 5.3845

January, 22, 1978

.'z'. Jo?w C. !tc~inley, Chiefmoject .".eview ="ranch:Io. 1Advisor„r Committee on .".eac wr Saf e guardsNuclear P. gulavory COIITI"'sionwashington, D.CD 20555

"ear John:

7his is a shorv report o: my pa ticipation in the Staff aud-'t of the seismicdesign of the Diablo C~~ "on iIuclear Plant last T"eek. ~ was there from!iondaymorning (16th) vo Thursday nioon (19th). ': was encouraged by Dana Allison andJim Knight vo participate fullv in all a"ts of the operation, including Staffcaucuses.

The "'"sv mo"nin. was occup. d by a f"'rlyla e group .ee+ing ri.th "-&-"- s+affand consulvants "rith sev ral p" sentations and question periods. he audit,olio'lin- the outline of vhe audiv forms produced by .he L.".0 Svaff beg-n thatafternoon wi h the Turoine "uilding nd too!r place at the of 'c. s of John 31LUmthe seismic consultant. P o~ress on that f'rst day was slow and disappointingto most o us, with only a'"out 20 percent of the Tur'oine 2ui3.ding outline 'be-irg zinished. n retrospecv, iv appears thav t4's 'ras no. only due to wo kingin a new mcde c"t vo the ccmpl xity of vhe str'tural resisving co™iporents ofthat building and to v¹ ac- t4ia origina~~y i+ had not 'oeen a Class X s.ruc-tu"e, 'ouv?ad h d to be inforced 'irith an assortment of added svren"-th co.".~™~o-nienits located ¹re and there throuchout t¹ structure ~ Cn vhe fol"OT1'= daysprogr ss was more rapid, in spite of +here 'being a good ¹al of one-to-ore in-depvh discussion while the rest of the group listened. Cn the other hand therewas plenty of in-depth disc ssion involv'ng all or most of 'd.e ~cup. incid nv-ally, the wor.<ing gro'p '1as never large - 6 to 10 usually - with ch'ang s cn -hePQ 3 side according to which building was under consideravion.

J.t was 0 ov ous tha v both s" des had do..e their home wcr'» . .'".Ost o= the poin s ofthe Sta could 'oe ansT1er d immediately an"'ome recuired ~evting maver al orpersons to the mee.ing. '"here '1 re a numoer,o incomplete ~~.alIvses reported.There 'iere also not Sew situationis i1here revisions wcul" be r quired.

cou 1 of fundamen va Qro'olems were unea~vhed ~ Cne '-'o" ve s he . z vhod used' analys n= piping.:rcm -';? e verbal and TI-.i".. n description o'he p"ccess1e were ul ab" e vo dec»e c ':?iat e:ctvent it. was e u" valel1 to vhe one "sed forsvructures, or even ='' i-.:.as tec'."ic Ily acceptable. -'? 's questicn Till getfurther a -.ention durinig thie firs+ day o'ne secs~" eek of vhe aurii (23d)"hen m"...b rs o" coth vhe Svr cvures and vhe .'!echa.".ical .";quipment "ranches T~'ll'oe on hand ~

Another .problem that 'ir'll rec'~~e explora ion is the use of synthetic g ou..dmotions "or aralyzin"- equipment 'which has japs in it, so that in+ernal impactsoccur during a disturbance, as is the case for certain reactor internals. "orsystem;ihose eouations of motion me e fectively linear (most structurespmac cin99 J'> pio3 1 w~ t..ou =aps~ etc ) sy ithetic 3 1puts ~ ive the sa e,+ca1 ~cs onses as actua'ound moi'ons havin"- the same s".ectra so thai ii;,Mes ro'"ference h"t synthetic input is 'sed. ith non-linear. systems such as

ones havin„-" "-aps so "..ai '~facts occur durin;; a response it can r~Le a c'ff-'erence. he ".u stion is,:. ho:r ~eat is tne differe. ce, a.".d has

.*.'est-".=house'x4ch

is anal~i~=.. the reactor) considered ihe question.,his:ill be dis-cussed during the a d"'t sessions viith "-'estin~~'";ouse ensineers scheduled or ~

Janue y 31 and -'eOruary 1 ~

P

Z have an excellent impression of he entire operation. 1t was well conceivedand 'rent ".rell. Tt 'orou-"ht together the workin~ level people of 'coth sides «wth

he opportunity for in omal, in-depth e~loration of what had ~e been done andalso «~hat had io be done. 7here ~as no -'ace of confrontation as happens some-times at hearings ~ith a, sizable audience o" hi~~~-level a~~wstrators.a."."e~aod to me that no one remembered whether ne ~ras ~rorkin"- ="or ":".~~ or for';~G.."or one thing, this me ting ~rent far to answerer the cri icis.. oI.CB heardfrom an intervenor, to the effect that ~"hile the California: epa."tment o. build-ing and Sa ety,or ecuivalert) checks t¹ dew-'led desi'f'" uol c Gu.ldingsin California, the . <C does not do the same for luclear reactors. (Qf coursek A ~

~re ...".C does not ..ave the ersonnel ="or +his, but these audi+s allo;! ihe Staffto co considerable checkme and to ~et an excel ent idea of the cuality andthorou>.'~zess o;" the analys.'s and design o'" a reac+wr.)

.".or ~se ., ihis ~(as an interes~=:s™ and r ~~din= assi~~-i nt and I ho.e that?.,C..S nx contihue to partic"'pate in such c"eratior~:xth ..~elf and other con-sultants

i telephoned your of ice on r"'riday and learned from I!ort that you had th -"lu.hope very much that this inds you better. i plan to ce in p~ ". off'ce on

26 and 27 Janua"y ard lcok fo~irard to see~s„"- you.

'."i'iih best r yards,

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AiNFOi'<l) LJN[VEIiSITYSl'Ai'4ftOllV.CALII:Ol',VIA 91305

.:ln.'ll Or CEOJ)IY~.CS.innl nl Fttih 5citncct

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July 22, 1977

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Hr. Joh:1 '.ici'.inlcyACRS

>t S,;iUcl.cia r RQ~ U la to y Cot' iss

ion'"ashington,D.C. 20555I

Dear John:

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jl. Ol:ir ~ it'.4 4

The encloset! diagr=l,i h resp ct 'to the Di.biopublished by th~ Sa:1 Joaqua Stanford thesis ,Gr"h ~,of the central Sali..ian blth..sis, Si0 p.).

may interest Coj 'ttoe -,.Q bcr'; and staf'.C .yon plant. Thc fipi re vas recent'y

in G oloc'cal Soc'ety but i" ra~en r o~S.A., l976, Tertiary s=d='".Qnt'ry tectonics

ock of California: Stanford Un'v. l'h, D.

dna. the firure shovs is that prior to about 5 =lill on years„a othe 1e ~ a" ive "lotion bet 'sen t;1Q Pacit c a. -' 0 Ln:i..le lc" 1 pl tes

i('urve C, or D) nias ~ rea ter than the San And Qas faul t mat on (C =ve .«)put n n thQ last 5,, y, 1 ..Q"e is little d' Qre..ce bet"e an -.he c„rvas.These co"oarisons mean that al...ost all of tne rclat':e piete ".o 'onin the last 5 n.y. 1;as on the S 1 Andreas ''aultt vhereas before t.."ttime large displacezents aust have taken p'ace on other faults.

This interpretation ~s conristent bo h vith !!all's evidence oflaTSQ tote d 'plaCin e,.t and Pith thQ app ' Cant S i.1fQr ilCQ 0" a SwalllJc'dern ra"e o d'lace; ent iong th !ios„"-ri ."al.

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ha i:rl.lan'eophy"ics Departl en"

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