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Forwards Matls Used in Long-Term Seismic Program Meetings in San Francisco,CA During Apr & May 1990

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Forwards Matls Used in Long-Term Seismic Program Meetings in San Francisco,CA During Apr & May 1990 ACCELERATED DISTRIBUTION DEMONSTRATION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS) ACCESSION NBR:9007250057 DOC.DATE: 90/07/17 NOTARIZED: NO DOCKET FACIL:50-275 Diablo Canyon Nuclear Power Plant, Unit 1, Pacific Ga 05000275 50-323 Diablo Canyon Nuclear Power Plant, Unit 2, Pacific Ga 05000323 AUTH.NAME AUTHOR AFFILIATION SHIFFER,J.D. Pacific Gas 6 Electric Co. RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk) SUBJECT: Forwards matls used in long term seismic program meetings in San Francisco,CA during Apr & May 1990. DISTRIBUTION CODE: AOOID COPIES RECEIVED:LTR J ENCL SIZE: TITLE: OR Submittal: General Distribution l NOTES:P~W5' / RECIPIENT COPIES RECIPIENT COPIES A ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA g PD5 PD 1 1 D ROOD,H D INTERNAL: ACRS tu NRR/DET/ECMB 9H 1 1 ( NRR/DOEA/OTSB11 NRR/DST 8E2 1 1 S NRR/DST/SELB 8D 1 1 NRR/DST/SICB 7E 1 1 NRR/DST/SRXB 8E 1 1 NUDOCS-ABSTRACT l. 1 OC/~FMB 1 0 OGC/HDS2 1 0 EG F E 01 1 1 RES/DSIR/EIB 1 1 EXTERNAL: LPDR 1 1 NRC PDR 1 1 NSIC 1 1 R D t.lMITEDDISTRIBtmON OF ENCLOSURES DUE TO SIZE D D NOTE TO ALL"RIDS" RECIPIENTS: PLEASE HELP US TO REDUCE WASI'E! CONTACT THE DOCUMENT CONTROL DESK, ROOM P 1-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED! TOTAL NUMBER OF COPIES REQUIRED: LTTR 27 ENCL f U ~ g E Paciftc Gas and Electric Company 77 Beate Street James D. Shiffer San Francisco, CA 94106 Senior Vice President and 415/973-4684 General Manager TWX 910-372-6587 Nuclear Power Generation July 17, 1990 PGKE Letter No. DCL-90-185 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Hashington, D.C. 20555 Re: Docket No. 50-275, OL-DPR-80 Docket No. 50-323, OL-DPR-82 Diablo Canyon Units 1 and 2 Long Term Seismic Program Meetings Gentlemen: As requested by the NRC Staff, PG&E is providing a copy of the presentation materials used in the Long Term Seismic Program meetings in San Francisco, California during April and May 1990. Enclosure 1 — Seismic Source Characterization Meeting, April 17-20, 1990. Enclosure 2 — Earthquake Ground Motion Meeting, April 30 — May 1, 1990. Kindly acknowledge receipt of this material on the enclosed copy of this letter and return it in the enclosed addressed envelope. ncerely, . D. Shif cc w/enc.: H. Rood cc w/o enc: A. P. Hodgdon J. B. Martin P. P. Narbut S. A. Richards CPUC Diablo Distribution Enclosure 3220S/0084K/DNO/1587 90072500;7, 9007t7 O 5/I PDR ADOCK 05000275 P PDC Pgd/ l I c" PGhE Letter No. DCL-90-185 6: ENCLOSURE 1 VIEHGRAPHS FROM SEISMIC SOURCE CHARACTERIZATION HEETING LONG TERM SEISHIC PROGRAM SAN FRANCISCO, CA APRIL 17-20, 1990 90072500g7 3220S/0084K h I NRC/PGKE MEETING ON SEISMIC SOURCE CHARACTERIZATION DIABLO CANYON LONG TERM SEISMIC PROGRAM ONE CALIFORNIA STREET, ROOM 271 SAN FRANCISCO, CALIFORNIA APRIL 17 - 20 1990 1 AGENDA TUESDAY APRIL 17 '990 8:30 a.m. Introduction 8:45 a.m. Hosgri Fault Zone -- Style of Faulting guestions GSG 1, 2, 3, 4, 12, 13 guestions SSC 2, 4 12:00 noon Lunch 1:00 p.m. Hosgri Fault Zone -- Style of Faulting (Continued) 4:00 p.m. Lorna Prieta Earthquake Issues Field Trip Discussion -- USGS (Dave Schwartz) 5:00 p.m. Adjourn WEDNESDAY APRIL 18 1990 7:00 a.m. Field Trip: Lorna Prieta Earthquake, Santa Cruz 7:00 p.m. Adjourn LSC/WUS:sjm - 4/9/90 FILE: NRCAPR90.SSC The southerly part of the San Simeon fault trace extends southeast from a saddle south of the area where Arroyo de la Cruz turns inland into the mountain front. This part of the trace follows the base of the prominent east-facing escarpment forming the west side of the valley of Arroyo Laguna and then crosses a marine terrace lowland fringing San Simeon Bay. In addition to field mapping by ESA (19?4), and Hall (1976), this part of the fault was investigated by Envicom, (1977) Qater reported on by Asquith, 1978), which used ground magnetometer traverses to identify fault strands and backhoe trenches to expose them. This part of the fault zone consists of a pair of strands separated by a down-faulted slice which underlies the floor of Arroyo Laguna Valley and extends to the head of San Simeon Bay. Two of the Envicom trenches (trenches' 5 and 6) exposed a waw Q west&ipping reverse fault along the trend of the west slope of Arroyo Laguna. In both trenches Franciscan melange bedrock was faulted eastward against and over a. folded se uence of sand silt and gravel interpreted by Enyicom as old marine h of San Simeon Bay. There, contacts between rock units are concealed by older dune sand deposits, but the units exposed along the shoreline are, from west to east, Monterey Formation, marine fossiliferous pebbly sandstone (in a single I , ~>Jc J. SAN SIMEON FAULT Airport Creek Trench 0 N66E Zone of Fractured Peds Topsoil (A) (A) Qt O g+E (E~) ~ 2 X SlltY ClaY (Bt) ~ (Bt~ Q3 I ) I I Q3 I I i ~'- Sandy C)ay Y, QS Sandy Silty Clay Jl +I I Ab (Btb) Z QS Silty Clay ~ . ij Buried A mb) O Silty Clay Sandy Clay (Bds) 06 Buried A (Ab) Fault Gouge 9 Silty Clay ' N40W Sack Clay <'0 Slickensides plunge 6-7'E s s ~ ~ ~ ~ ~ a ~ I 1 Sandy Clay 4 C-14 AGE 10670 %260 B.P. X = Modern Soil 0 2 FEET Y, Z = Buried Paleosols SW TRENCH T-4 SAN SIMEON FAULT ~ Airport Creek (MAJOR TRACE) TRENCH NE T-3 TRENCH 8,950 s260 T-1 SW ~ SW ~~ ~ nys t NE 1 ......" ~ „.s'~ i t " EXPLANATION ~l-.~r o' . t a" S a S,;",. ".:. 1%" 9,760+180 QUATERNARYUNITS 0 S r r Q Topsoil (A, AB and E horizons) Main shear N40W, Af~ 10.690 <130 grooves plunge (Holocene) 6. g SF 11,150 at15 irSr'.>.". Younger Alluvium (Holocene) sw TRENCH Older Alluvium (late Pleistocene) Ig T-5 NE SHEAR ZONE UNITS I'ain Deformed Older Alluvium (Tertiary?) shear Afy N4'IW, mullions ~ > p Fault gouge plunge9- tte SE 10.670 '260 D MESOZOIC UNITS t Franciscan Assemblage and related rr a rocks (Jurassic and Cretaceous) l 13,790 e260 TRENCH T-2 NE Fault; dashed where approximate; A away, T towards Main shear N25 ~ 40W, 0'ooves plunge Contact; dashed where approximate 35160 0560 Radiocarbon age in years B.P. Figure 8. Simplified logs of Airport Creek trenches showing a major strand of the San Simeon fault (View to NW). I f Q S',I GEOLOGIC LOG OF THE SAN SIMEOA FAULT EXPOSED IN AIRPORT GREEK TRENCH T-1 lf0$ 0 -M VltWkIT SI1 0010 Or10 OI00 OI40 OI$0 Or$0 0.10 OI$0 $K dINOId Iorlllog Ol rhlKIt«0 20rN 01 ««hah f orohge hearts vrNN Ito of sar«NI . ad«Id flrNera dared cloy IIIrhgI«NI S«N sehdg llhl, oracy IvNvNI eoKK ethd grKIKNOIICtrlIKN co«IKI INcorNO Ihrgldhcl 14 «Nh 0vel. Crsadehll lNIIof IOCO, rdddyeohto Aooro SOON Kael Closer echo. Ahodsr «rovhdtd ~IOIKsdoh INcvrKahd madel cger soSN oh INds. Klhestd dhe Ktrd ArcvtK lrKorhN rrNrlt cshls.l or ION Srh40gl dedeeedeh INCVra sl dre trey ~4y: sharded vrfeca adeN hht fgaly Kggcvrv ~tlgs KNKafoot,'ahCaro I ggrdd lier. CatK caerde 10 aei: dred llhrcvrKIII aec«he< aarcrde ICC 0 ho«had red. «a ol IMNsl rey chere OPSOS1$ ~ 011 0 OOOONI 04 Kthwty Srh. COKI 011 0, gNOCCK 0 I [TQFi Tres 'Ih 1 A I ~ ~ I ~ / "r p Q ~ -0. 0 Ml Inl 0 0 Ne red c rani ««44th llroh asldr. llhahKI4 ffhtdrdrhd ~ r ~thdKI ~ kaohthd Io ' I Ssht arorerfr slhssv ~NOONre4, Origo dr ad«Id ~horVl sehsahrrN. OOKO. aorvdhd CrdK heed« KOIONON,red shell MOOWrhha rrvrhrh 4lrhe4 Ilorh9 lll ScohtN4 Vah Orrd ~ Aaarasi«ONKO rv rated«N ehd hKKr los vre, sf Co«VCIKSIW seer«ed I«N ortrer Mor «0 ca«cthvte4rN 04 osl4ked INshK loca Otds rh vvevhgt4 IINrlOhd TIAO Kre« Othsls 14C 10 ~orNON coorso ore«N4 wd vied OKor«oteod Icawo ~OWSIN tlNN dldffl$ «NINO II.fSO gII0 er ~ S. Cared cfog Kehr vvy Ivrohdhed seed«shel yr OA Shod KSSW COOSKI IlKvNO. IOKIKvtvhg Co«roasrN chohool wroV roK TshrrcdKor«00N4 cfeley Is«4:afvlgrlleyl I I dhrKON tgd«K gorge $0«gr sill.OllorrhH. ffrN dr deed. hlehly ollldcl C 1. 10l$00ISOyrht. aldd y OINerto Arh:em: gsa dohd vorsorea sheer; Klow,eho 0 cora cohrKII (g Oodof ChrdNdraa r40lltavhdlhl dsrdel«N grthor Oar Ireo.w. Odrt arsy aohdfhg cohvolad ar l4c sr ~ hc ~ 44«tl rrrreri afsdr ~feeds;rtrr Iddlrhtvll ar««K $ - I'401:retel ~ I Oat«el helhrld lao fred«e«O. Os«4; ~ roeear I ~ lrrvhehdrlhdr vhrvssrrho Vds4sh IOVIVltIs sfell dNK IarN vrlKIMgl1 1 arrest«girl shd a ~rholnvds oerdrl N15 E 0 ~ 60'0' '+ 10'0'0'0'0SOIL: brn. to dk. brn. " r. pebb. with scatt. boulders TERRACE SAND: tan, fr. gr. ~ Sl TERRACE GRAVEL: Can to buff to rd-brn., ang. to md. pebb. and cobb. clayey sand natrix ~ 1h in ~ BEDROCK: shale (nelange) weathered 10 to nassive clay, blue-gy. to buff with sone shale nasses. /::. ~ . ~~:.. - . ~ , I ~ ~....r.% .'-..% i. '. cs TREIICH 5 q ~ Faulted 10'S'0'49E 15'ault "w+u ~ N40E, 80N TERRACE SANDS, SILTS, AND GRAVELS; in anticlinal fold with dips up to 35 deg. ~,+,4 b v ~ r .
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