ML14210A592
| ML14210A592 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 03/13/2014 |
| From: | Pacific Gas & Electric Co |
| To: | Office of Nuclear Material Safety and Safeguards |
| References | |
| Download: ML14210A592 (12) | |
Text
Northeast view of Diablo Canyon Power Plant and the ISFSI and CT F sites. T he ISFSI is at the base of the slope to the right of the raw water reservoir. T he CT F is directly southwest of the reservoirs. T he extent of the 1971 borrow area excavation is indicated by the rocky area on the slope above the reservoir. T he power plant and adjacent facilities are constructed on a marine terrace that is covered by Quaternary fan deposits. Photo roll WDP-1.
FSAR UPDATE DIABLO CANYON ISFSI FIGURE 2.6-2 DIABLO CANYON POWER PLANT AND THE ISFSI AND CTF SITES Revision 0 June 2004
Hos S an Luis gri Obis po L os DC P P Os os IS F S I Ols on ffault F aul t
mile s F au Pl 10 lt S o u th w e s te r n an B ou t nda ry Zo Si ne te R eg io n P is mo B each N
Zon e
(from P G &E , 1988)
Average fault trend (338û
) us ed f or ground motion analys es FSAR UPDATE DIABLO CANYON ISFSI FIGURE 2.6-4 REGIONAL STRUCTURE MAP Revision 0 June 2004
S mall paras itic s yncline R es ervoir R oad Photo of Obispo Formation dolomite and sandstone strata exposed on the hillslope above the transport route on R eservoir R oad. T he ISFSI site is to the right of the raw water reservoir.
B edding dips into the hillslope on the west limb of the regional Pismo syncline and extends beneath the power block (off photo to lower left). A small parasitic syncline is manifest as the U-shaped strata directly below the ridge crest in the middle of the photo. Several debris-flow chutes ( ) form the gullies on the slope above R eservoir R oad. Photo roll JL B -2.
FSAR UPDATE DIABLO CANYON ISFSI FIGURE 2.6-5 OBISPO FORMATION DOLOMITE AND SANDSTONE ON HILLSLOPE ABOVE RESERVOIR ROAD Revision 0 June 2004
E 1,148,500 E 1,149,000 E x p l a n ati o n Qc C olluvium 4 Qptm Marine terrace depos it (overlain by Qc) 30 5 L imit of 30 r To pogra phi 30 6
voi c Ma p Obis po F ormation (lo wer and mid dle Mioc ene) s er 307 Re DOLOMIT E UNIT A 9 Dolomite, clayey dolomite, dolomitic s ilts tone to fine-grained dolomitic 30 Tof b-1 s ands tone, and limes tone. T he unit contains occas ional dis continuous Qc N 636,000 to continuous (tens to hundreds of feet) clay beds that are generally 1/32-ter ' to 1/2-inch thick, but locally are thicker. R ocks in this unit are moderately Wa 310 B" 31 5 to well cemented, moderately hard to hard, moderately to slightly weathered, IS F S I Pads T-16 brittle and typically medium s trong.
307 T-21A 32 0 ad ? Friable dolomite and dolomitic siltstone of unit Tofb-1. These rocks typically w Ro 76 D? 325 Tof b-1a Ra 308 oir ? have low hardnes s, are very weak to weak, and occur as dis continuous e rv 01-G U? ? zones where weathering and/or alteration has been concentrated. Inferred Tof b-2a R e s 309 330 T-22 335 lateral extent of friable zones is s chematic.
? Tof b-1 T-9 T-10 T-2C 76 T-21 340 S ANDS TONE UNIT Tof b-2 T-1 27 345 70 D F ine to coars e-grained dolomitic s ands tone and s ands tone (arkos ic to 01-E 350 27 Tof b-2 arenitic) with lesser dolomite beds. Detrital clasts are composed primarily C T F S ite 98B A -2/3 70 U 355 Qc Tof b-2 72 T-20C of dolomitized felds pars , marine fos s il fragments, and volcanic rock 30 Tof b-2a T-2A 360 9 70 T-7 5 365 fragments. Discontinuous clay beds that are generally less than 1/2-inch I
30 70 T-8 57
? ? T-2B 370 thick occur locally within the unit. T he rocks are of low to medium 8
Paved area 80 U ?
63 T-20B 375 25 hardnes s, moderately to well cemented and typically medium s trong.
01C T F -A 01-D D ? T-3 00B A -2 ? 380 T-17A ? 15 ? 385 Tof b-2a Friable sandstone of unit Tofb-2. These rocks typically are of low hardness 30 D ? 390 4
01-C ? T-20A 395 are very weak to weak, and occur as dis continuous zones where 00B A -3 U weathering and/or alteration has been concentrated. Inferred lateral Tof b-2a 30 D D ? 400 28
? 30 7
? ? T-4 405 extent of friable zones is s chematic.
30 5 F ills lope 6 85 U U Tof b-1a ? 410 Paved area e 415 op ? ?
01-A T-17B ts l 420 6 8 cu 98B A -1 ? 425 S trike and dip of bedding T-4 E xploratory trench, 1/16"-1/4" 430 number indicated SI clay bed 435 U IS F 17 01-B ? 440 98B A -4 Tof b-1 80 Minor fault, dip indicated, das hed T-12 7 445 27 D where inferred, queried where Discontinuity survey line Tof b-2 T-18B 11 ? 450 16 DS -1 T-18A 11 455 uncertain, arrows s how relative in bulldozer cut 460 sense of displacement, U-upthrown, or t R o 27 Up to1/16"-1/8" 11 T-5 465 10 D-downthrown Footprint of 500-kV tower B"
T ra ns p clay bed 6 5 470 01-H 8 9 11 14 475 S mall, s econdary faults 1 10 6 T-13 8 10 480 expos ed in trench 29 7 T-11B 6 485 29 6 DS -1 ute T-11D 10 5 490 C lay bed, thicknes s indicated 29 5 11 1/16"-3/4" 10 5 5 495 0
50 29 4 clay bed 00B A -1 14 50 5
1/16" C utslope above and fill prism 29 3 T-11C 01-F 6 12 51 0
292 T-11A 6 8 1"-4" 8 51 5 wes t of IS F S I pads 291 5 7 7 clay bed 14 52 0 G eologic contact, s olid line 290 B' 12 5 10 1/4" clay 8 52 5 N 635,500 where well-defined, das hed Tof b-1 14 WR L 0 Axis of anticline, larger arrow 20 Tof b-1a 15 10 4 7
18 bed 53 where approximate 305 IS F S I 10 10 12 D' 53 5 s hows plunge, das hed 310 315 16 Tof b-1 fills lope 320 325 330 17 T-14A 16 10 5 13 where approximate 335 T-6 7
T-14B T-19 O1-C B
340 345 350 355 365 12 B oring for IS F S I, number 360 20 12 9 16 indicated (initial number is Axis of syncline, larger arrow 285 9 370 17 375 380 14 year drilled, e.g. 01 was s hows plunge, das hed 385 390 10 10 11 drilled in 2001) where approximate Up to 395 12 19 Qc 17 400 2"-4" 11 405 Qpt m 410 7 6 20 415 clay bed Axis of monocline, larger 10 15 17 A arrow shows plunge, dashed 22 14 11 23(? )
280 G eologic cros s s ection, where approximate 420 425 430 12 17 17 A'
435 440 arrows indicate end of line R es ervoir R oad 445 11 17 10 450 13 11 455 16 is off the map area Q5 14 12 460 465 B uried s horeline angle of marine 470 T-15 terrace wave-cut platform, number 475 480 485 19 N otes : 290 5' and elevation indicated 490 495 500 IS F S I geometry is based on P G &E E nercon Drwg. B ase map 505 510 from No. P G E -009-s k-001 dated 9/27/01.
515 520 13 01-I I' 525 18 Tof b-2 530 18 20 G eology not s hown in paved area and res ervoir area.
Qc Tof b-1 535 Qc N
30 5 540 545 Qpt m5 55 0 5 55 0 60 FSAR UPDATE 17 56 5 56 18 10 12 0 300 Q5 57 57 5
295 DIABLO CANYON ISFSI 0
290 290 5' 58 5 A' 58 590 610 0 50 100 150 200 FIGURE 2.6-8 D 595 600 285 C ontour interval = 5 feet GEOLOGIC MAP OF ISFSI AND CTF SITES Revision 0 June 2004
E x p l a n ati o n G e ology af Artificial fill (engineered)
Qal Qdf Quaternary deposits - alluvium (Qal), debris flow (Qdf), colluvium (Qc),
Quaternary Qc lands lide (Qls ), Holocene colluvial fan (Qhf)
Qls DOLOMIT E S UB UNIT Qhf Dolomite, clayey dolomite, dolomitic s ilts tone to fine-grained dolomitic s ands tone, and limes tone. T he unit contains occas ional dis continuous Tof b-1 to continuous (tens to hundreds of feet) clay beds that are generally 1/32-Qpf P leis tocene colluvial fan to 1/2-inch thick, but locally are thicker. R ocks in this unit are moderately to well cemented, moderately hard to hard, moderately to slightly weathered, brittle and typically medium s trong.
Qptm P leis tocene marine terrace depos it (inferred)
Friable dolomite and dolomitic siltstone of unit Tofb-1. These rocks typically Tof b-1a have low hardnes s, are very weak to weak, and occur as dis continuous zones where weathering and/or alteration has been concentrated. Inferred T vr Volcanic rock (middle Miocene), diabas e intrus ive s ills and dikes lateral extent of friable zones is s chematic.
Obis po F ormation (lo wer and mid dle Mioc ene) S ANDS TONE S UB UNIT F ine to coars e-grained dolomitic s ands tone and s ands tone (arkos ic to Tertiary Member Tof, unit b - dolomite, dolomitic s ilts tone, dolomitic s ands tone, Tof b Tof b-2 arenitic) with lesser dolomite beds. Detrital clasts are composed primarily and s ands tone: medium to thick bedding of dolomitized felds pars , marine fos s il fragments, and volcanic rock fragments. Discontinuous clay beds that are generally less than 1/2-inch Tof c Member Tof, unit c - s hale, clays tone and s ilts tone, thin to medium thick occur locally within the unit. T he rocks are of low to medium bedding, extens ively s heared hardnes s, moderately to well cemented and typically medium s trong.
Tor Member Tor - volcanic rock, zeolitized and s ilicified tuff Friable sandstone of unit Tofb-2. These rocks typically are of low hardness, are very weak to weak, and occur as dis continuous zones where Tof b-2a weathering and/or alteration has been concentrated. Inferred lateral extent of friable zones is s chematic.
S ymbols P leis tocene Marine Terraces Des ignation*
Apparent dip of bedding Q 1 Oxygen Is otope S tage 5a marine terrace (80,000 years old)
Apparent dip of bedding meas ured in boring Q 2 Oxygen Is otope S tage 5e marine terrace (120,000 years old)
B edding s hown s chematically and inferred from projection of nearby s urface outcrops or borehole s urveys Q 3 Oxygen Is otope S tage 7 marine terrace (210,000 years old)
Lithologic contact, inferred except where encountered in boreholes Q 4 Oxygen Is otope S tage 9 marine terrace (330,000 years old)
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and s urface mapping, queried where uncertain Q 5 Oxygen Is otope S tage 11 marine terrace (430,000 years old)
Fault - location based on projection of trench or surface exposure. Vertical projection is inferred. Dip of fault as s umed to be vertical unles s well cons trained by multiple surface attitudes. Queried where uncertain. S ense of vertical separation is indicated
- Ages and correlation of marine terraces based on K .L., Hansen, J.R . Wesling, by arrows and inferred horizontal right-s lip dis placement by (moving away from W.R . Lettis, K .I. Kels on and L. Mezger, 1994. C orrelation, ages, and uplift viewer) and (moving toward viewer). rates of Quaternary marine terraces, in Alterman, I.B., McMullen, R .B., C luff, L.S ., and S lemmons, D.B ., eds., S eis motectonics of the C entral C alifornia C oas t R anges : B oulder, C olorado, G eological S ociety of America S pecial C lay, s ilty and s andy, tan to brown, s ome angular fragments within clay matrix, Paper 292.
locally contains foraminifera, generally thin (1/16 to 1/2 inch). C lay beds more common and more laterally continuous in dolomite unit than in the s ands tone unit.
<1/8" C lay bed - weight of solid line indicates bed thickness where encountered in borings 1/8"-1/4" or trenches, das hed line where inferred (no thicknes s indicated); queried where
>1/4" uncertain, clay beds projected beyond borings or trenches bas ed on thicknes s
(>1/4-inch thick beds projected 100 feet as s olid line and 100 feet as das hed line, 1/8-inch to 1/4-inch thick beds projected 50 feet s olid and 50 feet das hed, <1/8-inch thick beds projected 25 feet s olid and 25 feet das hed) unles s cons trained to be s horter on adjoining boreholes and trenches.
01-H E xploration boring, number (01-H, initial number indicates year drilled) and depth T D 30.5 ft. (T D 30.5 feet) indicated FSAR UPDATE T-18 E xploration trench, number indicated; trenches are s hown open if they cros s s ection line, filled if projected into s ection line DIABLO CANYON ISFSI FIGURE 2.6-9 G roundwater elevation and date of meas urement indicated EXPLANATION FOR CROSS SECTIONS Revision 0 June 2004
A' 700 650 Inters ection D-D' Approximate 1971 pre-borrow excavation 600 topography
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01-I C lay bed projected Note: Harding, Miller, Laws on, (HML) 1968 borings and trenches from trench T-15 s hown on s ection are in rock that was completely removed in 1971 below the depth of the borings. These borings therefore are not shown S ilty weathered ? ?
s ands tone with ? ?
on the geologic maps (F igures 2.6-7) Tof b-1a ? 550 abundant clay HML 28 beds to 2' thick
?
HML 29 Inters ection B -B '
Inters ection I-I' ?
C rus hed fault zone Tof b-1a HML Trench A Laminated S ilty s ands tone with s ands tone ? 500 B reccia zone by HML abundant clay ? ?
(friable dolomite Tofb-1a? )
with s ome ?
tower clay layers ? ?
acces s T D 41.0 ft. ? ?
Altered road ? ?
s ands tone HML 27 T D 40.0 ft. T-14 T-14A 00B A -1 Tof b-1a 450 Matchline to below
? ? ?
HML Trench A ? ?
? ?
Tof b-1a Tof b-1 ?
S ands tone with clay Tof b-1 ?
tower acces s road ?
E levation (feet) s eams 1" thick in HML HML lands lide borings ? ? ?
01-F ?
? 400 T-5 ? ? ?
S hale ? ?
? ?
T-12 ? ? ?
? ? ? ?
? ? ?
? IS F S I pads ? ? ? ? ?
T D 90.0 ft. ?? ? ?
IS F S I Tof b-1a 350 C uts lope
?? ?
R es ervoir R oad ? ? ?
? 01-C Tof b-2a T-17A ?
Raw Water Reservoir Tof b-2a IS F S I Pads G rade
?
? ? ?
? Pads S ubgrade ? 300 T D 150.0 ft.
Tof b-2a ? ? ?
Tof b-1a
?
?
Tof b-2 ? ? Tof b-2a
? ?
?
T D 130.5 ft. ?
T D 67.0 ft. 250 Tof b-2 T D 321.0 ft.
C lay bed projected from cros s s ection I-I'
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Tof b-1 200
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Approximate location of contact 150 Tof b-2 projected from field mapping G E O.DC P P.01.21 R E V 2 along R es ervoir R oad (not s hown on F ig. 2.6-7)
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100 A Notes
- 1. Location of cross section shown on F igures 2.6-7 and 450 2.6-8. Nearby borings are projected to cros s s ection.
Approximate
- 2. S ee F igure 2.6-9 for explanation of geologic units.
1971 pre-borrow excavation
- 3. Horizontal s cale = vertical s cale.
HML 33 topography HML 25 400 Diabas e (T vr) 350 Diabas e (T vr) s ill mapped by HML T D 50.0 ft.
? T D 62.5 ft.
S ands tone 300 E levation (feet)
Matchline to above Tof b-2 250 FSAR UPDATE 200 DIABLO CANYON ISFSI FIGURE 2.6-10 150 CROSS SECTION A-A Diablo Creek 100 Revision 0 June 2004
Approximate 1971 pre-borrow excavation B 'B "
(B end in S ection)
N62 E topography N62 E Approximate 1971 pre-borrow 500-kV Tower B "'
excavation topography 400 Inters ection A-A' Inters ection I-I' S ection line is offs et 108 feet N30ûW IS F S I Pads E as tern s ide of 350 Topographic s tepis 01-E 1971 pre-borrow Trans port route caused by stepover in area cuts lope 01-D T-7 98B A -2/3 T-2A (R es ervoir R oad) cros s s ection 01-C 01-B T-21 HL A -9 T-17B Tof b-1 ?
(elev. 289.5') 01-A IS F S I Pads G rade ? Tof b-2a ?
Qptm HL A -8 (elev. 275') IS F S I Pads S ubgrade Tof b-2a C uts lope 300 Tof b-2 T hin road fill af Approximate backedge Tof b-2a Tof b-2a Tof b-1 Tof b-1 of wave-cut platform Tof b-2 Tof b-1a at elevation 290 feet (Q 5 ) ?
? Tof b-2a Tof b-1
? ? Tof b-2a Tuffaceous s ands tone ? ? ?
Tof b-2 ? T D 67.0 ft. T D 68.5 ft. ? T D 81.0 ft.
? 250 Tof b-2 Tof b-2a Tof b-2a ?
C alcareous s ands tone T D 72.0 ft. ?
Tof b-2a ?
S ands tone HL A -4 (elev. 195') Tuffaceous s ands tone ? T D 71.8 ft.
? Tof b-2a Tof b-2a S ands tone Tuffaceous s ands tone Tof b-2
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200 C alcareous s ands tone Qc Tuffaceous s ands tone Matchline; S ee B elow T D 95.0 ft.
T D 75.5 ft. Tof b-2a Qpf Qpf E levation (feet)
Qptm? Tof b-2a 150 T D 52.5 ft. B ackedge of 145' wavecut platform (Q 3 )
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? Tof b-2 98B A-2 T D 165.0 ft. 100 98B A-3 T D 220.0 ft.
?
Tof b-2 ? 50
?
Approximate location of contact projected from field mapping along R es ervoir R oad (not Tof b-1 s hown on F ig. 2.6-7) Tof b-2
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0
?
B 400 ?
-50
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350 Note: Detailed topography and fill near -100 facilities not s hown on figure 2.6-7 300 250 200 UNIT NO. 1 (projected from north) DDH-D Qc HL A -3 E levation (feet) 150 F UE L HANDLING /
AUX. B LDG . Qpf F IR E WAT E R T R ANS F E R Mis c. s and Matchline; S ee Above TANK C HE MIC AL AND G AS VAULT S ilty s ands tone Weathered Tuffaceous s ands tone 100 s ands tone S ilty s ands tone S lightly calcareous Tuffaceous s ands tone s ands tone with s ome S ilty s ands tone T D 48.5 ft. Notes friable zones
- 1. Location of cross section shown on F igures 2.6-7 and 2.6-8. Nearby borings are projected to cros s s ection.
50 S ilty s ands tone with thick clay coatings Tof b-2
- 2. S ee F igure 2.6-9 for explanation of geologic units.
FSAR UPDATE DIABLO CANYON ISFSI
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E levation profile and bedding attitudes from F S AR F igure 2.5-15 (R ev 11, Nov. 1996)
- 3. Hortizontal s cale = vertical s cale.
Tof b-2? S ands tone 0
Tof b-1? ? S lightly calcareous s ilty s ands tone FIGURE 2.6-11 S ilts tone CROSS SECTION B-B
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S lightly calcareous s ilts tone
-50 S cattered crus hed foraminifers Abundant foraminifers
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Revision 0 June 2004 T D 300.5 ft.
-100
T-15 T-19 T-14 d
r oa T-13 ccess T-6 a er tow T-5 T-4 T-11 T-20 T-12 T-3 tower access road T-18 T-21 T-2 T-7 T-8 T-17B T-10 T-1 T-22 T-9 T-17A Southward view of the ISFSI site, above the raw water reservoir. T he 1971 borrow area cutslope is indicated by areas of bedrock exposure and brown grass. Trenches excavated for the ISFSI investigations are shown (trenches backfilled in A pril 2001). Trench T-16 is located to the left of the photo. Photo roll A R 3-25.
FSAR UPDATE DIABLO CANYON ISFSI FIGURE 2.6-12 SOUTHWARD VIEW OF ISFSI STUDY AREA Revision 0 June 2004