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 CTF sites. The ISFSI is at the base of the slope to the right of the raw water reservoir. The CTF is directly southwest of the reservoirs. The extent of the 1971 borrow area excavation is indicated by the rocky area on the slope above the reservoir. The 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
S outhwestern B oundary Zone Hosgri Fault Zone Osos Los Fault N
(from PG&E, 1988)
Olson fault 10 miles P l a
nt S it e
R e gi o
n DCPP DCPP DCPP IS FS I IS FS I IS FS I osgri Fault Olson f 10 miles P l a
nt S it e
R e gi o
n DCPP DCPP DCPP IS FS I IS FS I IS FS I S an Luis Obispo Pismo Beach Average fault trend (338û) used f or ground motion analyses FSAR UPDATE DIABLO CANYON ISFSI FIGURE 2.6-4 REGIONAL STRUCTURE MAP Revision 0 June 2004
Photo of Obispo Formation dolomite and sandstone strata exposed on the hillslope above the transport route on Reservoir Road. The ISFSI site is to the right of the raw water reservoir.
Bedding 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 Reservoir Road. Photo roll JLB-2.
R eservoir R oad R eservoir R oad R eservoir R oad S mall S mall S mall parasitic parasitic parasitic syncline syncline syncline FSAR UPDATE DIABLO CANYON ISFSI FIGURE 2.6-5 OBISPO FORMATION DOLOMITE AND SANDSTONE ON HILLSLOPE ABOVE RESERVOIR ROAD Revision 0 June 2004
Tofb-2 Tofb-2a E 1,149,000 E 1,148,500 N 635,500 N 636,000 IS FS I Pads Tofb-2a Transport R oute 10 Contour interval = 5 feet 0
50 100 150 200 R eservoir R o ad 610 605 600 595 590 585 580 575 570 565 560 555 550 545 540 535 530 525 520 515 510 505 535 530 525 520 515 510 505 500 495 490 485 480 475 470 465 460 455 500 495 450 455 460 465 470 475 480 485 490 450 445 440 435 430 425 420 415 410 405 400 445 440 435 430 425 395 390 385 380 375 370 365 360 355 350 350 355 360 365 370 375 380 385 390 395 345 340 335 330 325 320 315 310 305 310 315 320 325 330 335 340 345 280 285 285 285 290 290 290 291 291 291 293 293 293 294 294 294 295 296 297 304 305 306 307 308 309 307 308 309 305 304 306 307 305 300 295 290 285 309 420 415 410 405 400 23(?)
17 11 16 17 6
12 14 16 10 12 14 4
5 6
8 16 5
11 11 10 11 7
5 10 6
1 9
8 6
14 17 15 27 27 16 8
17 5
10 17 11 9
17 11 14 20 10 11 20 11 10 7
15 12 12 9
14 18 18 12 10 20 12 28 27 10 17 22 11 19 19 13 20 18 13 14 8
13 12 17 10 6
7 7
5 12 7
16 A'
Up to 2"-4" clay bed 1"-4" clay bed 1/16"-3/4" clay bed Tofb-1 R eservoir R oad Limit of Topo graphic M ap Tofb-2 Tofb-2a Qc B "'
T-15 T-15 T-15 Tofb-1 Up to1/16"-1/8" clay bed T-18A T-18B T-18B T-18B 85 76 72 Qc
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T-10 T-10 T-10 T-7 T-7 T-7 Raw 12 5
10 15 5
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Water Reservoir 18 10 14 76 WR L 8
10 Qc 5
T-13 T-13 T-13 T-14B T-14B T-14B T-14A T-14A T-14A T-12 T-12 T-12 T-5 T-5 T-5 T-4 T-4 T-4 T-20C T-20C T-20C T-20A T-20A T-20A T-3 T-3 T-3 T-21A T-21A T-21A T-22 T-22 T-22 T-21 T-21 T-21 T-2C T-2C T-2C T-9 T-9 T-9 T-2B T-2B T-2B T-2A T-2A T-2A T-8 T-8 T-8 T-1 T-1 T-1 DS -1 DS -1 DS -1 T-11B T-11B T-11B T-11C T-11C T-11C T-11D T-11D T-11D T-11A T-11A T-11A 80 T-17B T-17B T-17B T-17A T-17A T-17A T-6 T-6 T-6 T-16 T-16 T-16 I'
D D'
T-19 T-19 T-19 Tofb-1 Tofb-1a Tofb-1 Tofb-2a Tofb-2 70 70 57
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B "
70 Paved area Paved area B '
290 5' B
Tofb-2 I
N 63 01-B 01-B 01-B 01-C 01-C 01-C 01-G 01-G 01-G 01-E 01-E 01-E 01-H 01-H 01-H 01-A 01-D 00B A-2 00B A-2 00B A-2 98B A-1 98B A-1 98B A-1 98B A-4 98B A-4 98B A-4 98B A-2/3 98B A-2/3 98B A-2/3 01-F 01-F 01-F 01-I 01-I 01-I 00B A-1 00B A-1 00B A-1 A
Tofb-1 T-20B T-20B T-20B 6
11 292 292 292 25 70 10 8
27 17 10 7
1/16"-1/4" clay bed Tofb-1a 1/4" clay bed
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Q5 m
Qc Qpt m
Qc Qpt
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D U
D U
D U
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D U
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D U
T-1 T-1 D?
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CTF S ite 00B A-3 00B A-3 00B A-3 01CTF-A 01CTF-A 01CTF-A E x pla n atio n 290 5' Tofb-2 Tofb-2a Tofb-1a Tofb-1 DOLOMITE UNIT S ANDS TONE UNIT S trike and dip of bedding Minor fault, dip indicated, dashed where inferred, queried where uncertain, arrows show relative sense of displacement, U-upthrown, D-downthrown Geologic contact, solid line where well-defined, dashed where approximate Boring for IS FS I, number indicated (initial number is year drilled, e.g. 01 was drilled in 2001)
E xploratory trench, number indicated Clay bed, thickness indicated Footprint of 500-kV tower Cutslope above and fill prism west of IS FS I pads Discontinuity survey line in bulldozer cut O1-C O1-C O1-C T-4 T-4 T-4 DS -1 DS -1 DS -1 Axis of anticline, larger arrow shows plunge, dashed where approximate IS FS I geometry is based on PG&E E nercon Drwg. Base map from No. PGE -009-sk-001 dated 9/27/01.
Geology not shown in paved area and reservoir area.
S mall, secondary faults exposed in trench D
U 80 6
Buried shoreline angle of marine terrace wave-cut platform, number and elevation indicated Geologic cross section, arrows indicate end of line is off the map area A
A' Marine terrace deposit (overlain by Qc)
Qptm Qc Colluvium Axis of syncline, larger arrow shows plunge, dashed where approximate Axis of monocline, larger arrow shows plunge, dashed where approximate Obis po Formation (lower and middle Miocene)
Dolomite, clayey dolomite, dolomitic siltstone to fine-grained dolomitic sandstone, and limestone. The unit contains occasional discontinuous to continuous (tens to hundreds of feet) clay beds that are generally 1/32-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 strong.
Friable dolomite and dolomitic siltstone of unit Tofb-1. These rocks typically have low hardness, are very weak to weak, and occur as discontinuous zones where weathering and/or alteration has been concentrated. Inferred lateral extent of friable zones is schematic.
Fine to coarse-grained dolomitic sandstone and sandstone (arkosic to arenitic) with lesser dolomite beds. Detrital clasts are composed primarily of dolomitized feldspars, marine fossil fragments, and volcanic rock fragments. Discontinuous clay beds that are generally less than 1/2-inch thick occur locally within the unit. The rocks are of low to medium hardness, moderately to well cemented and typically medium strong.
Friable sandstone of unit Tofb-2. These rocks typically are of low hardness are very weak to weak, and occur as discontinuous zones where weathering and/or alteration has been concentrated. Inferred lateral extent of friable zones is schematic.
Q5 Q5 Q5 1/16" 1/16" 1/16" IS FS I cuts lope IS FS I fills lope Fills lope Notes :
FSAR UPDATE DIABLO CANYON ISFSI FIGURE 2.6-8 GEOLOGIC MAP OF ISFSI AND CTF SITES Revision 0 June 2004
Dolomite, clayey dolomite, dolomitic siltstone to fine-grained dolomitic sandstone, and limestone. The unit contains occasional discontinuous to continuous (tens to hundreds of feet) clay beds that are generally 1/32-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 strong.
Friable dolomite and dolomitic siltstone of unit Tofb-1. These rocks typically have low hardness, are very weak to weak, and occur as discontinuous zones where weathering and/or alteration has been concentrated. Inferred lateral extent of friable zones is schematic.
Fine to coarse-grained dolomitic sandstone and sandstone (arkosic to arenitic) with lesser dolomite beds. Detrital clasts are composed primarily of dolomitized feldspars, marine fossil fragments, and volcanic rock fragments. Discontinuous clay beds that are generally less than 1/2-inch thick occur locally within the unit. The rocks are of low to medium hardness, moderately to well cemented and typically medium strong.
Friable sandstone of unit Tofb-2. These rocks typically are of low hardness, are very weak to weak, and occur as discontinuous zones where weathering and/or alteration has been concentrated. Inferred lateral extent of friable zones is schematic.
E x planation Artificial fill (engineered)
Pleistocene colluvial fan Member Tof, unit c - shale, claystone and siltstone, thin to medium bedding, extensively sheared Quaternary Tertiary Obis po Formation (lower and middle Miocene) af Member Tor - volcanic rock, zeolitized and silicified tuff DOLOMITE S UBUNIT S ANDS TONE S UBUNIT Pleistocene Marine Terraces Designation*
E xploration boring, number (01-H, initial number indicates year drilled) and depth (TD 30.5 feet) indicated
<1/8"
>1/4" 1/8"-1/4" E xploration trench, number indicated; trenches are shown open if they cross section line, filled if projected into section line G eology S ymbols
- Ages and correlation of marine terraces based on K.L., Hansen, J.R. Wesling, W.R. Lettis, K.I. Kelson and L. Mezger, 1994. Correlation, ages, and uplift rates of Quaternary marine terraces, in Alterman, I.B., McMullen, R.B., Cluff, L.S., and S lemmons, D.B., eds., S eismotectonics of the Central California Coast R anges: Boulder, Colorado, Geological S ociety of America S pecial Paper 292.
Groundwater elevation and date of measurement indicated Qptm Qpf 01-H
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T-18 Pleistocene marine terrace deposit (inferred)
Quaternary deposits - alluvium (Qal), debris flow (Qdf), colluvium (Qc),
landslide (Qls), Holocene colluvial fan (Qhf)
Volcanic rock (middle Miocene), diabase intrusive sills and dikes Member Tof, unit b - dolomite, dolomitic siltstone, dolomitic sandstone, and sandstone: medium to thick bedding Qal Qdf Qc Qls Qhf Tvr Tofb Tofc Tor Tofb-1 Bedding shown schematically and inferred from projection of nearby surface outcrops or borehole surveys Apparent dip of bedding Apparent dip of bedding measured in boring Clay, silty and sandy, tan to brown, some angular fragments within clay matrix, locally contains foraminifera, generally thin (1/16 to 1/2 inch). Clay beds more common and more laterally continuous in dolomite unit than in the sandstone unit.
Lithologic contact, inferred except where encountered in boreholes and surface mapping, queried where uncertain Fault - location based on projection of trench or surface exposure. Vertical projection is inferred. Dip of fault assumed to be vertical unless well constrained by multiple surface attitudes. Queried where uncertain. S ense of vertical separation is indicated by arrows and inferred horizontal right-slip displacement by (moving away from viewer) and (moving toward viewer).
Tofb-1a Tofb-2a Tofb-2 TD 30.5 ft.
Oxygen Isotope S tage 5a marine terrace (80,000 years old)
Oxygen Isotope S tage 5e marine terrace (120,000 years old)
Oxygen Isotope S tage 7 marine terrace (210,000 years old)
Oxygen Isotope S tage 9 marine terrace (330,000 years old)
Oxygen Isotope S tage 11 marine terrace (430,000 years old)
Q 1 Q 2 Q 3 Q 4 Q 5 Clay bed - weight of solid line indicates bed thickness where encountered in borings or trenches, dashed line where inferred (no thickness indicated); queried where uncertain, clay beds projected beyond borings or trenches based on thickness
(>1/4-inch thick beds projected 100 feet as solid line and 100 feet as dashed line, 1/8-inch to 1/4-inch thick beds projected 50 feet solid and 50 feet dashed, <1/8-inch thick beds projected 25 feet solid and 25 feet dashed) unless constrained to be shorter on adjoining boreholes and trenches.
FSAR UPDATE DIABLO CANYON ISFSI FIGURE 2.6-9 EXPLANATION FOR CROSS SECTIONS Revision 0 June 2004
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Raw Water Reservoir R eservoir R oad IS FS I pads Tofb-2 Pads S ubgrade IS FS I Pads Grade Clay bed projected from cross section I-I' TD 90.0 ft.
01-C T-17A IS FS I Cutslope
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HML landslide HML Trench A Intersection B-B' S andstone with clay seams 1" thick in HML borings S hale Breccia zone by HML (friable dolomite Tofb-1a?)
HML 27 T-12 T-5 01-F tower access road HML Trench A Crushed fault zone S ilty sandstone with abundant clay Altered sandstone TD 40.0 ft.
HML 29 HML 28 S ilty weathered sandstone with abundant clay beds to 2' thick Laminated sandstone with some clay layers tower access road TD 41.0 ft.
Intersection I-I' T-14 00B A-1 00B A-1 T-14A Clay bed projected from trench T-15 Approximate 1971 pre-borrow excavation topography Intersection D-D' 01-I
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Tofb-1 TD 150.0 ft.
Tofb-2 Tofb-1
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Approximate location of contact projected from field mapping along R eservoir R oad (not shown on Fig. 2.6-7)
TD 67.0 ft.
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TD 130.5 ft.
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Tofb-1
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A' TD 321.0 ft.
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400 450 350 300 250 200 150 E levation (feet) 500 550 600 650 100 700 Matchline to below Matchline to above Note: Harding, Miller, Lawson, (HML) 1968 borings and trenches shown on section are in rock that was completely removed in 1971 below the depth of the borings. These borings therefore are not shown on the geologic maps (Figures 2.6-7) 400 450 350 300 250 200 150 E levation (feet) 100 Diablo Creek S andstone Diabase (Tvr) sill mapped by HML HML 25 HML 33 Approximate 1971 pre-borrow excavation topography TD 62.5 ft.
TD 50.0 ft.
Diabase (Tvr)
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A Tofb-2 Tofb-2 Notes
- 1. Location of cross section shown on Figures 2.6-7 and 2.6-8. Nearby borings are projected to cross section.
- 2. S ee Figure 2.6-9 for explanation of geologic units.
- 3. Horizontal scale = vertical scale.
Tofb-1a Tofb-1a Tofb-1a Tofb-1a Tofb-1a Tofb-1a Tofb-2a Tofb-2a Tofb-2a Tofb-2a FSAR UPDATE DIABLO CANYON ISFSI FIGURE 2.6-10 CROSS SECTION A-A Revision 0 June 2004
B
-50
-100 400 0
250 300 200 150 100 50 350 E levation (feet)
Tuffaceous sandstone UNIT NO. 1 FUE L HANDLING/
AUX. BLDG.
FIR E WATE R TR ANS FE R TANK CHE MICAL AND GAS VAULT TD 300.5 ft.
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Tofb-2?
Tofb-1?
S andstone S ilty sandstone with thick clay coatings S iltstone S lightly calcareous siltstone S cattered crushed foraminifers Abundant foraminifers S lightly calcareous silty sandstone S lightly calcareous sandstone with some friable zones
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Weathered sandstone Misc. sand S ilty sandstone Tuffaceous sandstone S ilty sandstone S ilty sandstone TD 48.5 ft.
Qc DDH-D HLA-3
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98B A-2/3 98BA-2 TD 165.0 ft.
98BA-3 TD 220.0 ft.
Tofb-2a
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Tofb-2a
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TD 71.8 ft.
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01-A 250 300 200 150 100 50 350
-50
-100 400 E levation (feet) 0 Thin road fill af TD 72.0 ft.
TD 67.0 ft.
Topographic step is caused by stepover in cross section Intersection A-A' Intersection I-I' 500-kV Tower Transport route (R eservoir R oad)
Approximate 1971 pre-borrow excavation topography S ection line is offset 108 feet N30ûW B 'B "
N62 E Approximate backedge of wave-cut platform at elevation 290 feet (Q5)
Tofb-2 T-17B Pads S ubgrade 01-B IS FS I Pads Grade 01-C Tofb-2 IS FS I Pads IS FS I C utslope Approximate 1971 pre-borrow excavation topography N62 E T-7 T-21 01-D T-2A
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E astern side of 1971 pre-borrow area cutslope Tofb-2 Tofb-2 Tofb-2 Tofb-1 Tofb-1 B "'
Tofb-1 Tofb-1 TD 68.5 ft.
Tofb-2 Tofb-2a Tofb-2a Tofb-2a 01-E TD 81.0 ft.
Tofb-1a Tofb-2a TD 52.5 ft.
Qc Qpf Qptm?
Backedge of 145' wavecut platform (Q3)
Tuffaceous sandstone TD 75.5 ft.
S andstone Tuffaceous sandstone Calcareous sandstone HLA-8 (elev. 275')
HLA-4 (elev. 195')
(Bend in S ection)
Qptm Tofb-1 Tofb-2 Tofb-2 HLA-9 (elev. 289.5')
TD 95.0 ft.
Tuffaceous sandstone S andstone Tuffaceous sandstone Calcareous sandstone (projected from north)
Qpf Tofb-2 Qpf Tofb-2a Tofb-2a Tofb-2a Tofb-2a Tofb-2a Tofb-2a Tofb-2a Note: Detailed topography and fill near facilities not shown on figure 2.6-7 Matchline; S ee Above Matchline; S ee Below E levation profile and bedding attitudes from FS AR Figure 2.5-15 (R ev 11, Nov. 1996)
Approximate location of contact projected from field mapping along R eservoir R oad (not shown on Fig. 2.6-7)
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Notes
- 1. Location of cross section shown on Figures 2.6-7 and 2.6-8. Nearby borings are projected to cross section.
- 2. S ee Figure 2.6-9 for explanation of geologic units.
- 3. Hortizontal scale = vertical scale.
FSAR UPDATE DIABLO CANYON ISFSI FIGURE 2.6-11 CROSS SECTION B-B Revision 0 June 2004
T-21 T-21 T-21 T-1 T-1 T-1 T-17A T-17A T-17A T-18 T-18 T-18 T-11 T-11 T-11 T-12 T-12 T-12 T-5 T-5 T-5 T-4 T-4 T-4 T-20 T-20 T-20 T-13 T-13 T-13 T-19 T-19 T-19 T-14 T-14 T-14 T-15 T-15 T-15 to wer access road T-2 T-2 T-2 T-3 T-3 T-3 T-6 T-6 T-6 tower acces s road T-10 T-10 T-10 T-9 T-9 T-9 T-7 T-7 T-7 T-8 T-8 T-8 T-22 T-22 T-22 T-17B T-17B T-17B Southward view of the ISFSI site, above the raw water reservoir. The 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 April 2001). Trench T-16 is located to the left of the photo. Photo roll AR 3-25.
FSAR UPDATE DIABLO CANYON ISFSI FIGURE 2.6-12 SOUTHWARD VIEW OF ISFSI STUDY AREA Revision 0 June 2004