L-20-005, ISFSI, Revision 10 to the Updated Final Safety Analysis Report, Figures 2.6-1 to 2.6-20
| ML20281A413 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay |
| Issue date: | 09/03/2020 |
| From: | Pacific Gas & Electric Co |
| To: | Office of Nuclear Material Safety and Safeguards, NRC/OCM |
| References | |
| HIL-20-005 | |
| Download: ML20281A413 (20) | |
Text
ry unda rty bo prope P G &E IS F S I B uhne Unit 3 N
S it e
Units 1 and nt P la E UR E K A 0 0.5 mi 0 0.5 km PACIF IC A rea of ins et OCE AN 0 1 2 mi 0 1 2 3 km FSAR UPDATE HUMBOLDT BAY ISFSI FIGURE 2.6-1 TOPOGRAPHIC MAP OF HUMBOLDT BAY SHOWING LOCATION OF THE HUMBOLDT BAY ISFSI SITE PLANT LOCATION DRAINAGE Revision 0 January 2006 AND TOPOGRAPHY
P lant K ing S almon IT SP U TH SO FSAR UPDATE HUMBOLDT BAY ISFSI FIGURE 2.6-2 SOUTH HUMBOLDT BAY VIEW IS SOUTHEAST Revision 0 January 2006
180W 160W 140W 120W 60N C as c adia 50N S ubduc tion Zone Mendoc ino F ault S an A ndreas F ault S ys tem FSAR UPDATE HUMBOLDT BAY ISFSI FIGURE 2.6-3 Color shaded-relief map (oblique Mercator projection) of the Cascadia subduction zone along the northwest coast of the United States and Canada (from R.A. Haugerud, 1998, USGS Open-File Report 98-140).
Revision 0 January 2006
ee n Qu lo tte a r u lt C h Fa Triple unc J tion Ex R i plo r dg er e E XP L OR E R C ANADA PLATE e Ca s ca is R
ca d i a S u b d u c tio n F u de an J UA N Ju WAS HING TON DE F UC A Bl an P L AT E c o Zone Fa ul PAC IF IC t OR E G ON is e aR NOR T H P L AT E rd Go G OR DA A A ME R IC A N Me n P L AT E A' doc i Humboldt Bay no F aul t Zon e IS F S I S ite P L AT E ME NDOC INO (fixed)
T R IP L E J UNC T ION V IZC A INO R E G ION B L OC K NE VADA C ALIF OR NIA r
PAC I F I C O C E AN S an A n d ea s PAC IF IC Fa u lt S yst e
P L AT E m 0 100 200 mi 0 100 200 300 km ME XIC O FSAR UPDATE HUMBOLDT ISFSI FIGURE 2.6-4 General plate tectonic setting of the western United States. Humboldt Bay and the proposed ISFSI site are on the western edge of the North American plate, at the north edge of the Mendocino triple junction region. Three plate-bounding fault zones, the San Andreas and Mendocino transform fault zones and the Cascadia subduction zone, intersect at the triple junction. Cross section A-A' is shown on Figure 2.6-10b.
Revision 0 January 2006
PAC I F I C O C E AN C as c a dia S u b d u c ti o n OR E G ON C ALIF OR NIA L i ttl a lm e S G OR DA on P L AT E Zone F au Ma d ys R iv e NOR T H lt S Z
te m u lt E el R iver Humboldt r Fa A ME R IC A N S egment Bay on Li e t tl e al IS F S I S ite P L AT E S
m P etrolia on U S egment Be Fa ul ar t D Men d o c in o Fau lt Z o n e Ri ve Zo lt rS h
au Punta ea E
nF Gorda AT rZ on ta i e
L EE o un BP PAC I F I C O C E AN PE eM SU TR lt L ak au OL IA R F V E v ill e
?
RI SU PAC IF IC r TE L G a r be BP ne LA Ba P L AT E r tl e r
S an A nd tt Sp
?
Ma r in ac gs ea am Fa 0 25 50 mi s ul au t
aF Fa ul 0 25 50 75 km t lt Zo ne FSAR UPDATE HUMBOLDT BAY ISFSI FIGURE 2.6-6 MAP OF SUBPLATES IN THE NORTH AMERICAN PLATE AND MAJOR FAULTS IN NORTHWESTERN CALIFORNIA Revision 0 January 2006
Age (million years )
Gorda Plate Seismicity 0 1 2 3 4 5 6 M 4-4.9 (1990-1999)
M 5-5.9 ll ll M 6-6.9 (1950-1999)
M 7-7+ 1 2 2A 3 3A 4 Blan Anomaly c o Fa u lt l l 43°N l l Bl a n co F l l ract u re Z l l l o ne l l Ris l l l l e l l l l l l l l
Cascadi a l l l l l l RIGID l l l
l l
l Go OR E G ON rd 42°N S ubduction Zon a- C ALIF OR NIA l
l l GD GORDA G o r da Z C res cent C ity l l l l PLATE NORTH l
l Tra l
l l
n sit e AMERICAN l l l io n l l l l PLATE l GORDA l DEFORMATION 41°N l
l l ZONE Humboldt Bay l l IS F S I S ite l l l l l l l l Mendocino Fault Zone Sa PACIFIC PLATE n An 40°N dr 127°W 126°W 125°W s ea ult Fa N 0 50 mi Zo ne 0 75 K m FSAR UPDATE HUMBOLDT BAY ISFSI FIGURE 2.6-7 Tectonics of the Gorda plate (Modified from Wilson, 1989, Figure 3). The deforming and seismically active southern part of the plate and the internally rigid northern part are separated by a narrow transition that strikes northwest and intersects the subduction zone a short distance northwest of Humboldt Bay.
Revision 0 January 2006
B uhne Dis c harge P oint Bu IS F S I C anal F ault hn S ite eP oint B ay F a ult E n tr a nc e F a
R IG ID NORTH c tura G OR DA C as c S tru P LAT E Mad AMERICAN a di l D is c er Go a F re s h w a t L IT PLATE ontin rda
-G TL R iv DZ uity E er Ea Tr an So SA s te s it ut io n he LM Fa rn L rn Li ON imit ult m
it CSZ C SZ B ig Lagoon Ru FA Ee Li ure pt ttl UL R upt l
ur e T Sy e
nc Zo Ri SY e Su ve lin ne G OR DA ST bd r
SaEM io n lm R uc t on U P Mad R iver S lough trees m
egment Ee SSe g l TU Ri RE DE F OR MAT ION EE ve E ureka L r T ab AR le EA RI VE F aul Bl t
R Sy nc l uf f F au IS F S I S ite ZONE ine lt SE E el R iver trees GM Zone EN P e tr T R UP T Zon UR E e o lia R us s F a u lt AR E A B ea r Se R iv L ak gm er en 1992 EE eM Men do c in o t P etrolia tn F au lt L
Zo ne Sh earthquake ea R IV Fa rupture r ER u lt area PE SU B N PACIFIC Punta TR OL PL AT Gorda
? IA G E SU a PLATE BP rb
? LA er vi TE lle 0 5 10 15 Mi S ? Fa ul an Fa t
0 10 20 30 K m ul s ea e dr o n An t Z FSAR UPDATE HUMBOLDT BAY ISFSI FIGURE 2.6-9 Major active faults and known or inferred earthquake rupture areas (line pattern) in the Mendocino triple junction region (stippled area). Paleoseismic data indicate the Little Salmon fault system ruptured during a great Cascadia subduction zone (CSZ) event, which may have ruptured as far as the southern limit of the CSZ, 300 years ago, and that the Eel River segment ruptured independently less than 200 years ago.
Revision 0 January 2006
12 40 S urface dis placement (m) S urface dis placement (ft.)
30 8
20 4
10 0 0
-2 Axis of E dge of -10 Aleutian continental P atton B ay V olcanic arc S E trench s helf fault NW 0 0 North American plate 20 50 Depth (km) Depth (mi)
I nfe rre d un de rthrus 40 t dire c tio n
100 P acific plate 60 80 150 200 100 0 100 200 100 Dis tance perpendicular to zero is obas e (km) 0 30 mi Inferred faulting a) 1964 A laska E arthquake Sources 0 50 km P os s ible faulting P os s ibly did not s lip Wes t E as t A F igure 2-6 A' P aleozoic accreated crus t S ediments G orda Mes ozoic accreated crus t ris e Mt. S has ta Oceanic Marine T hrus t faults Mes ozoic V olcanic rocks P acific crus t s ediments intrus ions plate Normal faults Ocean 0
North American plate 50 Depth (km)
S trike-s lip faults Megathrus t Andes itic magma B as altic Normal faults P artial melting of magma upper part of 100 s ubducted plate As thenos phere S ubducted G orda plate 150 0 100 200 300 400 500 600 Dis tance (km) 0 30 mi 0 50 km b) Cascadia Subduction Zone E arthquake Sources.
L ocation of cross section A -A ' shown on Figure 2.6-4.
FSAR UPDATE HUMBOLDT BAY ISFSI FIGURE 2.6-10 Schematic cross section showing the suggested mechanisms for the 1964 Alaska earthquake (Plafker, 1972), and postulated Cascadia subduction zone earthquake sources.
Revision 0 January 2006
125° 41° 124° M
AD RI VE R
F ic k le U IS F S I S ite A rcata Hi FA ll R i LT CA NORT H A ME R ICA N dge Granite B utte LI TT ZO S C A DIA LE PL AT E SA E ureka FR ES NE LM ON E HW A T R
QTw GOR DA PL AT E FA FA U TA U BL LT FA E B L LT A' ON UL U T FF cb ZO NE CO TI AS TA L
SUBDUC BE y
LT T H R YA Gu thr GE ie C r e e k QTw R False FA US Cape UL T FA L T 40.5° S E C RUS fc APE S Z F FA O AU LT UL B ri NE BEAR R IV E R F T C OA S T A Cape Mendocino AU LT A G ar Devil s Gate ZO be r ME NDOCINO FR A CT UR E ZONE cr NE v il l e An PET R O t if LB L IA G or ar m FA ELT Petrolia UL be T rv TH B ull Creek i lle R US Z ON E Sy SA nf or T
N m y AN DR Panther Gap PA CIFIC PL AT E EA K IN Honeydew S G R A NG E Phill FA TH G U
A RU RB LT Cooskie Creek ST ER V ZO IL K ing Peak LE B ear B uttes NE kr ZO NE QTw CA FA UL LI T FO E ttersburg RN IA A ZO N
Garb E
B enbow COA S cr MA P L OCAT ION Pt. Delgada y
40° Whale Gl.
125° 124°
Mendocino A Uplift S an Andreas F ault Honeydew P etrolia C oos kie F ault Zone F ault Zone F ault Zone 0 Overlap Depos its K ing C oas t R ange T er (Oligocene and younger)
T errane R anges F rancis can F als e T errane?
C ape V IZC A INO C omplex
- G reat V alley S equence ? ? ? ? ? ?
?
D e pth ( km)
C oas t R ange Ophiolite?
-1 0 ?
B L OC K P ossible
? ?
S lab ?
G ap? G orda P late
?
P acific
- F arallon P late
?
Oceanic moho
-2 0 ?
(Hens tock and others ,
? ?
? C ontinental moho 1997) ?
Oceanic Mantle S outh edge, G orda (Hens tock and others ,
P late (from J ac hens 1997) and G ris c om, 1983)
-2 6 0 10 20 3 D is ta nc
Little S almon F ault S B ear R iver F ault Zone Little S almon F ault Zone F als e C ape F ault B
S outhwes t E el R iver B as in T able B luff F ault R us s F ault Qal Qhc Qal
( s ea level ) 0 T mm QT c s 1
E levation, meters x1000 Qtr 2 T f3 3
T pm 4
T mp 5 T f3 T f2
?
6 7 T f2
? ? ?
8 T f3?
9 V ertical = Horizontal FSA HUMBOL FIGU Geologic cross section of the Humboldt Bay Region. See of cross section B-B'
T HIC K NE S S mya* AG E (Meters )
0 Hookton F ormation Holocene (in this report) 150+
QUAT E R NAR Y C arlotta F ormation F alor P leis tocene ? ? F ormation (Mad R iver V alley)
Wildcat 3650 S cotia B luffs F ormation G roup 1.6 R io Dell F ormation P liocene E el R iver F ormation 5 P ullen F ormation Miocene 600 T E R T IAR Y
[23
á38 765+
Y ager T errane E ocene C oas tal F rancis can C omplex B elt C oas tal 54 ? T errane P aleocene 65 F aulted C R E T AC E OUS TO MIDDLE ? C entral J UR AS S IC B elt mya*= million years ago FSAR UPDATE HUMBOLDT BAY ISFSI FIGURE 2.6-15 COMPOSITE STRATIGRAPHIC COLUMN, ONSHORE EEL RIVER BASIN (AFTER CLARKE, 1992)
Revision 0 January 2006
te r S y n c h wa li F res ne A rc ata E urek a An ti c l i n e ARC ATA BAY P AC I F I C OC E AN E ureka H U MB OL DT B AY S ou IS F S I S IT E th Ba Hum y
bo ld Sy n
ill t H T a b le B lu f f An F a u lt ti c li n
L i tt l e 0 3 mi
Buhne Point DISCHARGE Splay Fault CANAL Fault ISFSI FAULT oint SITE eP hn Bu N
Bay nce Entra Fault tle Lit on lm Sa lt Fau Brazil Property, WCC, 1980 College of the Redwoods trenches LACO, 1999b College of the Redwoods WCC, 1980 Quarry exposure ESA 1977 Swiss Hall site Witter and Others, 2002 E a st e al Zon Centr Tra West ce c Carver and Tra e Burke, 1988 EXPLANATION Fault (projected surface trace) 0 2000 4000 ft to Carlotta 12 km 0 500 1000 m FSAR UPDATE HUMBOLDT BAY ISFSI FIGURE 2.6-18 SURFACE TRACES OF THE LITTLE SALMON FAULT ZONE SOUTH OF THE ISFSI SITE Revision 0 January 2006
A' A 8
-11 CC Humboldt Hill W Humboldt B ay R IO DE LL F OR MAT ION (V E NT UR IAN)
E E L R IV E R F OR MAT ION (R E P E T T IAN)
Note: Location of cros s s ection s hown on F igure 4-1.
FSAR UPDATE HUMBOLDT BAY ISFSI FIGURE 2.6-19 Cross section A-A' across the Little Salmon fault zone at Humboldt Hill (after Woodward-Clyde Consultants, 1980, Figure C-15).
Revision 0 January 2006