ML16341B301
| ML16341B301 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 02/11/1980 |
| From: | Varga S Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML16340A836 | List: |
| References | |
| NUDOCS 8003140454 | |
| Download: ML16341B301 (10) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 FED 1
3 1980 MEMORANDUM FOR:
Diablo Canyon Board Members FROM:
SUBJECT:
Steven A. Varga, Acting Assistant Director for Light Water Reactors, Division of Project Management BOARD NOTIFICATION -
INFORMATION ITEM -
RECENT OFFSHORE SEISMIC REFLECTION DATA AND ITS SIGNIFICANCE TO THE DIABLO CANYON NUCLEAR SITE (BN-80-6)
The attached memoranda from R.
E. Jackson to J.
F. Stolz and from R.
B. McMullen to R.
E. Jackson, both dated January 21, 1980, concerning the subject matter, are forwarded for your information.
The, information concerns an interpretation of recent seismic reflection profiling data taken in shallow water across southern extensions of the San Simeon fault zone.
As stated in the memoranda, Mr. Lesley, a student at the University of California at Santa
- Cruz, has used the above profiling data to document a connection between the San Simeon fault zone and a splay of the Hosgri fault zone and as evidence of post-Wisconsin displacement on an offshore extension of the San Simeon fault zone.
The attached memoranda also states that the above information had either been previously documented by the applicant (evidence of post-Wisconsinan faulting on an offshore splay of the San Simeon fault zone) or assumed (connection between the San Simeon and Hosgri fault zones) in establishing the current staff position regarding the SSE for Diablo Canyon (Supplement No.
4 to the SER, dated May 1976).
Theref
, the staff concludes in the attached memoranda that it sees no r easo to modify the current position regarding the SSE for Diablo Canyon.
AttachmeIlts:
As. Stated
~
~
ssistant Direct rga, Act g
OI'or Light Water Rea tors Division of Project Management
0,"'I'1'I'D STA I I!S W~uCi r-.AR Rl:.( ULAlOIEY C;0!;;Y I.'",8 tQN Va'fisl>>WCi I'ON, D. C. ~Q,'i55 January 21, 1980 E
hLtlOr~~NDUN FOR:
J.
F. Stolz, Chief, Light Hater Reactors Branch Pl, DPN
, Rom:
SUBJECT:
R.
E. Jackson, Chief, Geosciences
- Branch, DSS RECENT OFFSNORE SEISMIC REFLECTION DATA AND llS SIGNIFI-CANCE TO THE DIABLO CANYON NUCLEAR SITE.
The attached memorandum describes information presented in an abstract published in the November 13, 1979 American Geophysical Union Publication, EOS, Yol. No. 46.
The abstract summarizes the work of R.
B. Lesley, a student at the University of California at Santa Cruz.
Hr. Lesley has documented a connection between the San Simeon fault zone and a splay of the Hosgri fault zone, and evidence of post-Hisconsinan displacement (less than 20,000 years old) on an offshore extension of the San Simeon fault zone.
A copy of the abstract is attached.
In our dir't testimony (Si;epp, 1979) we concluded that the Hosgri and San SQr,;cn fault zo>>i s belong to Zl e same coastal zone of deformation; and that
~.he style of tectonlsm within the coastal zone is one of anastamosing and en echelon fauli.s, which is typical of other fault systems within the Coast Range that are subsidiary to the San Andreas.
He further concluded that the d.ta available at that time led us to conclude that the San Simeon and Nosgri were not directly linked.
He have not had the opportunity to evaluate tl e new information.
- However, a possible connection at depth of the Nosgi i and San Simeon fault zones had been assumed by the USGS in its <<nalysis of the Nosgri fault, and was part of 'he basis for its recv;~.m.>>datic n for i.he maximum Nusgri earth-quake.
The NRC staff accepted the USGS recommendation r egarding the size of the SSE (magnitude 7.5).
Additionally, post-Hisconsinan faulting had previously b."en documented by the Applicant on an onshore splay of the San Simeon fault zone.
He have contacted the U.
S. Geological Survey with respect to this information and they indicated that they were aware of this information and had seen the data, although they have not reviewed it in detail.
They indicated this new data does not change their conclu-sion regarding the maximum earthquake that could occur on the Hosgri i"ault zone.
Thereioi e, we see no reason to modify the current staff position regarding the Safe Shutdown Earthquake (SSE contained in the Safety Evaluation Report (supplement 4, tray, 1976).
l e Ro, I~o',;=ver, recoi-..;:nd that the Diablo Canyon ASLB be made avare of I;his new information bec-use consideration of the connection of the tv(o i"aults >:as discussed during the hearing.
/
r a'obert E. Jac,s~n, Chief Geosciences Branch Division of Systems Safety cc w/encl:
J.
I:nigl>t, DSS D. Vassallo, DPI'.
Tourtellotte, OI:I.D L. Reiter, DSS P. Sobel, nss 8.
P n:kley, DPI<
R. Iict'>ullen, DSS J.
- Devine, lISGS F.. ll':!)en, OII.D PDR
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m>><l<.5.
T)..S fc>a> t cI'< res< lens.
v<< ~ fa Ai(AT< VL I")>5)
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for stress t<.">ry <o<.jjtjan act<la, ( <ces
<,vlvcl<nt tc I. '-ais oj i<ir st<ass !lie 1>cn a(plied tc !>e r.'.as of t!e ir)tl. '(ar t! e e<<ds of the I<'.Seg )
~.Cans cf t>v fault t>e s>>>lr StreSoeS are I'llyls LSjh as 3X'a<<S
~ <<>.Ile alc<<g the It<I<5;~<Sic<. t>t st>>ar St<<ca level js fairly <c>.s'.l<<: <<1th ialues s)ijhtly 9<<< ~ tcr 1>>>n 10u !arS. a'SIS <<jth !On> !lry Cj<pllCC-cents c<
r<<i:It<
!I<9 to 1!>> r<'atjae <otion of
."Srth C. >>flea it<. <<.I,:t to t>>> facjfjc platt s'.>Sc tht 1657 ca".'-.';<)c a<<<>
a'!so 'vtn con.
<re5. !Clc>>1 ~ ;
>)<i'ns a
e !acr. Inta>p<<\\
cd
>S St<a <a:CS. !<< 'C
>S ! f!u)u) alo> 9 the fault Is
~ <5>,v'>
c '" ~ : <<1<< t<<a I<. el>>< 5 the th< (>'>lt 0$ 4 f<. '
Cs I! />>r, ir, ayr<e cnt
<<Ith c "."
~ <<5 1'>c <<r es.
T>e <>l>,)e jr> 1!<Cr st<<css 1<isla C.r jn; 1><;<st 12C y<ars aic on 1>.t order of ttrs c!: srs >.(<r th< ends o( the
)acted >e.!Icr
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a !e !lrs ll<>y tf>> losted I srt joc <<it!. a s)jjht co.>.:crc)<>>ivjse rota! jon cf stresses jn 1>r Cll<fcrnja bulge.
To r&el Cftesa CISg)a<e'C>1 I!.<!lryCO>CI!IG>5 lfC CIP'I j<d to ">> >Ort!.< r. a<<5 SO>>!L<r> seC!Ion) Of tte fault. Elle>>la!<5 stress<<<)
are s j<jllr to ct! <r rogels el<ay the lofte5 p r!Icn of the
!lult, ll!!sv)>. 1 jynifi<lnt diff<rii!Cs j>i tie crj<rtlt!ons Of S':<S!CS OCC~r n<lr tt>> e>ds of the lofLed )crtjon.
T]38 I'OSTEi. rg!ER C<<<<ai)STIIY A'I SI!L' Cr."..6E".E'1 CC< O)fgh)AE t!:(hf)OSS OI 6! fA' E<<<<S rit'1 209!
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l ~ <\\I(v> <f C((Gf <C T<fcfif)'
ad I aft<.
I(f)><<tin I<aft)(< a<ca fr<C <i<ar<17 ff,
'a ~ fy ii ~ 1)C 'iif ~. Cfe if<if Va fi If<If) fa I<<C If <<r>>><<<<ion vf<)a I<( ~<xi<<I<<g c! I<1 sf ~
I<f.f!)<a a;,C 1<riff< Cata for C(<ail>C i<>>cy
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A i<na cf ('a<< I>>;)I'<f<rfiChie<i<<i i<<C!Can< ~
<<a< <)!<i, a raar >affi<<< faa> of af<'vatic I aie
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<'<<><a <<)<Or I
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Alber< T. f x!<i !Earth pcje-cc 5sard
'a'nvv'<faith CT Ca'.!!ernie, Santa
- Crux, CA OSQ64)
"e.(r..at!cnr ard
-.. t jr. E(uthvff>
!'a!If rn!a afe 4:tf'.j-!ed <<]ncl!ng of t)c San Andr<af fsv!1 <<nd tc hie!sidle T< i I<!f. ]9)7).
T) <se r!Ce]s
~ >>i..e c!51<AL CILI!(fv)A I
< >ifc ( a<<i f<<I< sc<<>
2<<*>C ~ tilt<~ faicy ef C.<S!. rrfa. !.:.<i Cr <, ra. '9)36<)
I f ~<rf t)f A. 5!;v<<r)
I OA<<.ar.!Ifa.r.!av) t(n<< ia
~ c<-,)ii i<r>>c<
- ~ ) '.<.as i<r<*<<rui I ~ ><fan< ro<tl
<i ind <f> tie ca p af j<r of s'f p)c atrllc ~ >'.'9! ~ <)t Ci ~ cri rjrnjficunt vaf!Ctjcnc jn vvff'c yc >=-a<inn at tie fau]t tip fr<<: asti<ra<<tf ~'. a. fc re.aa<<.]on.
I<< fof-.Scions
~>>c- ~ a ~ <c ujth 4 t)e fan]t are
<<R;af<.d <o,!n-!
~iscf..Ic <reep.
T) CO F))<ITS Egt'<ERT Eyp>LS Oy
]'EFOP.J>T)OÃ
)<<RO
< i r c Oyt SL]p EARTI!Qt,'Argy I<a! Ypng iT. I:if] TOLSCC
>a~th ac<
Rept.
and p)afietary Srjecc<<s, R>sr. ~
Inltltu<e Of Tvfhnc]nyy> Ca-5 Eassachusects 02)39)
TI>.e depondo..c stress f<)axe<
strike-s) ip earth) st< a js ca)c'sing three djnersjc. 41 finite
~
mode]s.
A step by step int<yra'cheme is used to ca)cu)ate ti.e dependence due to v!s ca')aetio action.
Stree<<a, s<rajnS arad
<>onto are ca]cu'.atod for severs'.
< arch>>ca)es.
Specie] ca)cu)atit tilde 'for the Coyote eke earth]<
6 August ]9)9 to predict pc,st
~ <
do!ocr ation and stress diffusjof Results indicate that the tine C
b< havior js controlled by the vi va)ue jn the fsoje]. If there js viscosity region extending to s) dopth under the fault, c)>>re is propagation effect even for jnt silo cart)<<]sakes, The fey>on of the fau]t tip cx)arian as an Inc<casing stress
)ev<<] afu) de!o rcr>tirue for years
~!ter the ova A rrc'acl>n js a >I ~
< ~ >i-'<<Y ta Ca..en<>i to cl><ra<5 s,r"/>>I a 'Igf of >ii~ Ic af< I<Icy, If.;if<I:u)ar 'af:
var<bye>les, a!cng;! ~<<.!;v:irjrs. I fran the Cc>2].'f I cf tc i.'>i<jc )I<'f>;
~ viacei)a>tic !':>>a<!Iles) a<<L(cf <I'a fat j<n C<ael~>C by SS<< c!!I~ ~ ~ (r'>
stfv>s pll<r/I'a.C><jan r'5<<1.
!r:.<i<
given Caicril lng t! e rus>'!static sti<>>
crus< ~I fi<ifla) elf><5 b)'\\cagi)y pro or s>>5!cn)y Introduced slip of r Ttufi along transfers or fu(Auction tiT>> plat
)ouv)aries.
S'h<n ccf;afrg ii<h t'hfie f
><a< joa ri through !I<he> !<fi ruffur<<>
~ <rof!S<eg aj<L <f.<Ilif
\\ flit<<l <abjl'jt s!cc Cc'v>>J(nf l<<a..
Cue <0 vise<<<la><jc fva)C ~ >i of <!e aic s)hare, lt >2<<!s of thar OCC(r of I af
'ig
~cf ~ an cah H<
> <<if c>i< 'aisc<>
i(ficta V!. <O >;aids af a!au<
)SO Lm)v a>su.!ng a vise<atty 4( t>i c<Jar of I
for the lsthcn<s,herc anC ln if(ac<>ie.
nldulus of gxlo I'a for )t<h )ai<r>.4 i)ai<ic fr)ail<ion cf <I< <<i<!>:4~;!(r<
to a b>1) uip of st<as<
1
'<I
< l ~as a
s>>JC<f>)y arfea<rd cf in<ra'ic<<J <rauu I<<. <cs ~ er<bl f!
c s if<i!
<rifcifing cffi<l I f 5!s<.;fain<<i <flva ij<h sp<<<C>
c< ;arl!)c <o c!>(ra<6 !).r.
aplccn<<r cjgfa:Ion.
I< ~'.sc f f>.jf!,<s sac<<arias of <I e C<p(rg(ct sar<>i tfru<
fr<
ca]or ><Istic r;; uris i<<o icj-!!,
gap fears lt ra i..ich. Sy gf(a<)y ra.'i<ragi tectonic r <cs cf ><fr>sj<<g.
T)42 A'LYTICALSOLI' O" TO r
SS )>
T)OE ]:: A
<<0 I>]"vayj]C:LALL]Tr]S!
Shv>> AC'a Po A)<<re i. 9:jth (]cth at: Earth 9 5 ard, L'r!ver<I a o! Ca!!f<fn!s yaf.'.4 C.
s CA
<<36C).
"s c '- a.<<
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.a-'a')
CI a)I I SS I'IA<<TIC< I>a )hi La,',Rap)I!V<[
tpi >2<<'! I 9>!A<<<<<IIPV "C<<ll <L<)v f>f <<L
- y. E, L<'..air
'S. TS J. f. SICe jal) att lf. C <.<<Ia(faj<y, fi!<r,, of tsgi:(<ric, I>>
I>,
I'f 'a> ~ance>>
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t<t !<to f,'I'III tc '.>t <. I>e
>.rr). '<Ir II>> <i dc o( !!< 1>.led;or!Itis of t>o f<<lt t}e st+sr "i~<<et lrt lo
~ Sly lt h(9'!. lS 3{>0 >art, h>il)e
>1< "5 I> e loci<<d:If!Is<. t!t i!Oar Strt co<I!lh'. OIIL Is)Its s)36>tly crt<ter Vah 190 tars. Y'dc)I I Ith Ie '.Cfry CIIP!<ct.
<<<ts <err<<<joiCI<'5 tc I!t r<', ~ !Ive rot(<n of Slrth Lftrlcs <<Ilh r'.;<<et to thc I'lclfic p)ste Ihtc t!>> IESI <tr'SIS.I<t III< also Iota con-s<der>C. Cllcvl>ti!It>l'r are t<ca I>It<Sf>ted
~I st<<(r. rites. Trt Yf.iif s h}1>)u< tloig the f>alt Is r<gsced tc ccit<itrltt <tio!h a)erg II>>
5>olt lid c:tslh ct" !l!<d stra!ri r<ttc scrota t!>> I~ lt Cr a !<f. 11> I I(> ytyr. In S>re<Cent vlth <'!<trit Itis!<, <<'os.
1st c!*>)t In s'itar st<<IS lt>tls <'Illtit jl<t 120 years are oh the or tr of tort of.'\\
5 r<<r Vt vi I of 'tht locled stet!<r fid ~ !o* !sr. along Ve la<led
)ort!oh <<It!i a slip.: c'tcrcl<:I I<e rotlt(oh of strfts<t In t>.r !l)!'Iir.leI.JI)t. !o rode) cr<rp, CI<f!<c<f>>it I:.'<rs cci Cit!crs are
~Ip)(td 'Io VA h'r'Vfrr oiid Soot><'ill I<'ctiohs of vt r<vlt. '. ~'Icv!st< ! s! efst< ar< Cfr!)lr tO Ctl>>r il!tlt~ )Ghg tte I !1>5 <<<rt!ch Of tr>>
fault, ait><<lfih SIP,S(!<<it diffCr>es Iii the cr!rht ~ t!oh< Of St<<:Itt O<Cur <car tk< olds of Ve )<cltd fort(oh.
I')
38 I<63)LR FAI CR
<<<<II:A'ITYA' It<LACY <I r<<nt<<SOS) ru OI}tt'e>t ty!CSSIICS Cr TRC IA" !Sr!Ox IA<'Ll Loge,
< C"Ik>L CAI.I>61"IA I.s. Sf<If< {I>r<t.,<<!<<<i< I>lid, I'AIr><<t<y
<! Cll!">>I ~, clr< ~ crlr, ra.
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< ~'ir\\Iy fh 'I ~ <}'<~I!
~ r ><<i<<<if~ I'i<f ri i ~ <<
<>d Ir >I r >
'. O'i v!<! 'r< ~ >i<<< frc tt <I.srf Ii<<I~ ~ <<lr I r,,fr< r<:>!rr Cf<>I}id ><vcr of >\\re<'l<l) <ii<<<3<.> rt G>>ih<<r I>>< ~ <>3<hi r
at
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~ ir. !<o)<< to <I< r Grth v<r< *<<< Irt'ly ~ r
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I rviri<<> I <ilt ~;if><~ r ~ I ~ Cf
~ c<c><3< Il><
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<< fh !3> r C> ~ I>><<
> 'tr<<>.< Ili!h r>I<< Ice i
<Cl='ril t)l\\) ~ ld Iilr<f>>l.l>>ic!)iso ro<> ~ ~ fan I> Ii'll.><e <I;r<xf ~ < ~ Iy IO 4
>Go<!xl~ <vf<C C<r Il< I
~ <n Ily vi<<<f Sc I
'1< tr'!~ C t} <i.<' "I<<'I
~
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~
<<'<ll< >I> I
< ~ < i<>
< 5<<
c I ~ ~ ><<>, \\ <lier rill<<ill}t< a < art,.I>
<r< ')<CI> <II>ft of trit"'I~ <or>th >i(trit.<s{f 2<,e'.vi I<sr>) ~ lhd
fr <<<rd> Gf a t>l[C l,ic f l oh the
~ < ~ t)lor, T) 39
)'R STP)EE-I'P A':I
>A<EST FAULTS A)kore T. !'n!ch (Earth F !<<nce !Oard L'ntvpr>T<y of Ca)it<In!a, Santa Crus, CA 95066)
De(creat!Ont arid wP15!t !h F< uthlrn
-ll!tern!a cro attr'.<Put>C co 1< el:.,e of
- he San Ahdrfac fault srd to c<<rfsnlc
!, 76, Fr<<.
nt t lld F>vis ~
'9)63
- ,- ~'icff. !o))).
Io><
Co)s a>r
"..e c
- u. C<rrt<<rid t!e <i;r!I!clice nt t!cre C<j<nd on the ccnfiturat Ion of the fault l..d the ruhduct!ng, )i<hosp) rra.
A rfrp)e strfl.c-s)fp rlu)t Croon<crates
>fryntficlnc vari.time fn v<<rtical Cr.or:..ation at tbe Sault tip arfsing f<c= a>thoro>p'boric rr)a>ltfon.
.",<!cr.at!ons assoc!aced uitb a bend ln tke fault are'o-..plrcd to <!rple l'cfhric cr<.ep.
'<0 Rfi Tln Y.. '.:a?i Toksbs (both lt<
Ofpt. ot Earth lid Planetary Scioriees, <<tsrlehusotts I..stitute ot Toc}no)o)y, Cartrfdgei Y>shaehosocts 02)39)
TS.">> dependant stress ro)axat5on aftor strfkc slip clrtbgul'kos is ca)cu)ltod urirg three Cirons(onal finite cl<, ont r: Cols.
A stop by step Ir>tigration
>c<<c. e fs used to ca)ou)ate the cine d<Fond<hce due to vihcoe!astie Ir>cor l:tion.
- Stresses, strains ahd dlsp)acc-rorts are calcu)aced for svvora) ivAOI
<lrtt; lkos.
Spoc5a) ea)culltfons ace
. 1 e !or the Coyote I>>ko earth>(uake ot C
A AT>est 3 929 to predict post earth)ulke 5<.! I..ltfor. lnd stress diffusion.
I!<ul:s Sr>"3cato that. the tine dopcn!ent 1<}<vier ia cchitro)lod by the viscosity va)ue in the rode).
If there is a lou vfrr>s!ty region oxterding to otal)ov Copth urdur tho tau)t, t)iere !s a a<.ress
- re; lglticn ef!cot. even for Sntorr>>Cia<a ri c corti>('s'kvs..te region in front e! I}e tlu)t t!p <>Forfar>c<
<Sf ig SAl I<'V<'I l>C Cofot:etio>IS c:.".!..;o ter )cars a!<<<r t}.c avant.
I. I. I<thfr I. L>
J. I. r<cr (lll ltr Ir. n I>Alt>i>'ty, I!,I>frr.Gt !n;!A<<rint, S>I 0, A
<13<. I> ",>Sited <<! Ich r>y tf tuh C"I<do! <o <! ~ <r<f
> '.', r>13!at >hd t!Crit!oh
< rV<L itf>, l'I.lg F)ltr I;.-Jlrir>.
St lr!>fs
- <!<1 C<v<I:;<d hy ri<I c. IS>ir's PI>hr
><If>> !>t</to. 'It!ca r"Jrl.
SG)u<I<h> are CS< 1.'i>rr)h!>>c t!< ru>>!><otic >tie'>Ihg ot cr "tl!'> st<via) cl ><d h} <t<<CS)y Props sting or >J
< I'I'h ro u<f
>SIP or rl>)turf cv<hts
~I
fs ~ < rltf> <<h!ch o>y fr<<<IT <I<<cd ~'Icrli<'<ctollc r tf> of ><rf>>Ihg. T)<2 A~A'.ICAL SOLL i 100i TO STI EFS I)I FAOA >1{>." l." A Y<<'0 L>!.'! $ )O::AL L).ROSF: ERE A'.<<it.. Fr!ch (boch ac< Earth Sc!<<nCe ErlrC. Ur!vi..<Itv of Cs)!f'ernie. been fnve>I IE*t<d a<<alyt !ca) ly In too dfn<nrions. >1,< r(Ce! chnsfsts of a rectangular c)astic I!tbosp!rre of constant clifcl.r<cs ever)yfnr, a Iklxvel)iln v!>roe. ~>tfe ast. <resp! <re. The corre>l< nd<<ice prfrclple to~>'.ates tbc cgult!<>0 In the Ll,.'sce'<csfn. Ih<<lorica) 5rv<r< ion to tbe t!n< Cc..lin ui!rE the FFT tive> ircxyonrivr and sfrpfe co'lutfons. A C!>p'acct,<nt 'Io'Clry cond!<ic,n is a; p!I<d to sinu)ate the <lrc!r ske is)ip af>cnt ~ finite rupture core at the corv<rg<nc plate boundary. Tbe <<r'Cte" fs a>>i" od to be stress
- free, and <lear stress vanishes on the other tvo bou;Caries.