ML070720226

Sce&G VC Summer Site - Site Characterization Visit (Handouts)

ML070720226
Person / Time
Site:	Summer
Issue date:	06/22/2006
From:	Bechtel Corp, South Carolina Electric & Gas Co
To:	Office of Nuclear Reactor Regulation
References
Download: ML070720226 (44)

Text

NRC GEOTECHNICAL VISIT VIRGIL C. SUMMER NUCLEAR STATION (VCSNS)

[Old] Nuclear Training Center (NTC) - SC Hwy 213 JUNE 22, 2006 TIME AGENDA ITEM LEAD 8:00 Welcome & Introductions SCE&G

• Nuclear Training Center (NTC) Logistics

• Safety Issues 8:15 NRC Entrance - Comments NRC

• NRR

• Region II 8:30 Site Orientation Presentation SCE&G

• Project Schedule (Whorton)

• Project Organization

• Site Location / Facility Layout

• Initial Project Evaluations 8:45 Local and Regional Geology / Seismic Sources WLA

• General Overview (Lindvall)

• Geology Maps

• Seismic Sources (Faults) 9:15 Geotechnical Investigation Program Bechtel

• Geotechnical Investigation Plan / Layout (Davie)

• Results to Date (Soils, Rock, Groundwater) [MACTEC]

" Rock & Soil Sample Identification 9:45 Inspection of Rock Cores & Soil Samples All

• NTC Library Display 10:00 BREAK 10:15 Site Field Visit All

• Power Block Area (Drill Rigs, Wells, CPTs, Downhole Geophysic Tests)

• Site Area Rock Outcrop 12:00 LUNCH at NTC 1:00 NRC Break-Out Sessions: All

• Technical Discussions and/or Additional Field Visits

" QA Programs / Procedures / Data Collection, etc.

" Response to Questions 3:00 NRC Caucus NRC 4:00 NRC Exit - Comments NRC

• NRR

• Region II 4:30 ADJOURN

SCE&G VC Summer COL Subsurface Investigation Bechtel Corporation NRC Site Visit June 22, 2006

Subsurface Investigation

" Boreholes

- Soil and Rock Drilling (111 Total)

• Observation Wells (31 Total)

- Slug and Packer Tests 4'.

• Cone Penetrometer Tests (36 Total)

• Test Pits (20 Total)

" Geophysical Testing

- Downhole Testing (8 Total): ON.k (P-S Suspension Logging, Gamma, Resistivity, Televiewer, Caliper, and Deviation)

- Seismic CPTs (7 Total) 13

- Electrical Resistivity (6 Total)

F Location Plan is .EP-1.-

Available!

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R-4 (S)

,-326 B-303 8-.332

• 8-330

[OH)

B-331 CS) B-329 B-328

F3orings: HQ Size (26 total) 2 to 350 ft depth (1 completed) 2 to r(1 215 ft depth completed)

.8 to 175 ft depth (3 completed) 8 to 150 ft depth (2 completed)

ý6 to 115 ft depth (2 completed)

Borings: NQ Size (85 total)

• 4 to 175 ft-depth (1 completed)

, 27 to 115 ft depth (10 completed)

° 2 to 100 ft depth- (2 completed)

• 24 to 85 ft depth (11 completed)

• 2 to 80 ft depth (0 completed)

• 10 to 70 ft depth (10 completed) 1Ito 60 ft depth (1 completed)

S10 to 55 ft depth (4 completed)

• 5 to 40 ft depth (0 completed)

Observation Wells (31 total)

• 1-to 115 ft depth (1-completed)

• 4 to 100 ft depth (4 completed),

• 1 to 80 ft depth (0 completed)

• 12 to 70 ft depth (12 completed)

• 9 to 60 ft depth (9 completed)

• 1 to 55 ft depth (1 completed)

• 3 to 50 ft depth (3-completed)

CPTs (36 total)

SIto 80 ft depth

• 29 to 50 ft depth

• 6 to 40 ft depth 7 of the 50 ft CPTs include seismic tests For 80 and 50 ft tests, advance to refusal even if deeper than specified depth.

L-

Laboratory Testing: Soil

• Moisture content (500)

• Unit weight (30)

• Specific gravity (30)

• Sieve and hydrometer analysis (100)

• Grain size analysis w/no. 200 wash (100)

• Atterberg limits (80)

Chemical analyses (pH, chloride, sulfate) (30)

• Moisture density,(20)

California bearing ratio (10)

Unconfined compression (20)

SUnconsolidated undrained triaxial compression (40)

Consolidated undrained triaxial compression (15)

Direct shear (20)

Torsional shear and resonant column (16)

Consolidation (15)

Laboratory Testing: Rock

• Unconfined compression (80)

• Unconfined compression wI stress-strain (40)

• Slake durability (8)

'Age cdating (standard radio carbon) (8)

• X-ray diffraction/mineralogy (8)

• Petrographic analysis (thin section) (20) w _ __-- _ _ _ _ - -

Subsurface Investigation:

SJ une 11, 2006 Status I Completed Boreholes: 49. (44%)

• Completed Observation Wells: 30 (97%)

S*Boreholes, CPTs, and Downhole Geophysics Estimated Completion Date is Late July

Subsurface Profile

• Residual Soil- reddish sandy silts with variable clay content 0 Saprolite - completely weathered rock but w/preserved relict rock structure

• Partially Weathered Rock (PWR) - decomposed rock matrix mixed w/semi-hard rock fragments-

• Moderately Weathered Rock (MWR) -- >50% by volume of sound rock interspersed w/decomposed zones

• Sound Rock - Hard fresh to slightly discolored rock (granodiorite, gneiss, schist)

S u bs u rface P rofi le l.

B-201 B-305 Residual-Soil 0-17 ft 0-33 ff Saprolite 17-37 ft 37-51 ft PWR 37-50 ft 51-57. ft MWR 5.50-62 ft 57-61 ft Sound Rock >62-ft >61 ft

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__C_ ___ A** o MY

INTRODUCTION

• Welcome & Introductions

• Nuclear Training Center (NTC) Logistics

- Fire Exits

- Restrooms

- Refreshments & Lunch

- Locked Entrances

• Safety Topic(s)

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NRC Field Visit

" Orange Vests Shall be Worn

" Safety Protective Devices - Not Required Outside Drill Rig Ribbon Barrier

" Inside Drill Rig Ribbon Barrier:

- Steel Toe Shoes & Gloves

- Hard Hat & Eye Protection

- Ear Protection

NRC ENTRANCE

• NRC Entrance Comments

VCSNS COL / Proj-ect Schedule Fall 2007 - Submit COL Application

• 2011 SCOL Approval (42 Months)

• 2011 - Initiate Safety Related Construction

• 201 5 - Plant Operation

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SCE&G NProject Organization (Geotechnical

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VIRGLC.S SEMERGENCY Lis~n C:r orey-Sch.

T04EM HOMLDINGaa (MEONTICELLO RECREATION AREA)

PLAN EVACUATION

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Ch* THEBAEIMRTITS MAP WARR PREPAEDVO F 1.1 *!i*ENHPORTIONS OF THENTIC LLOWRINGRVOUTHPCAROL 8 1 tula .:. STAT H IRGHWA DEPARTME NT GEER STA A ION EARIIQA*.

SOUEWR e SECURIT GATESTHlnsMl.

A MAP NWER CUT VCOUN FoArcIRFITEL 91 192,RVIE ITY EIE 90 P17

VCSNS Units 2 & 3

• Site Selection Study (Fall 2005)

- Virgil C. Summer Nuclear Station (VCSNS)

- Savannah River Site (SRS)

- Other Sites (SCE&G Service Territory)

• Preliminary Geotechnical Investigation (Late 2005)

- 10 Boreholes (Laydown Area L-50 & Borrow Area G)

- L-50: Rock @ 45'-65' depth, Groundwater - Rock

- Borrow.Area G: Rock @ 85' depth, Groundwater - 50'

a e 4'

Virgil C. Summer Nuclear Station COL Local and Regional Geology / Seismic Sources -

William Lettis & Associates., Inc.

Scott Lindvall NRC Geotechnical Visit V.C. Summer Nuclear Station, SC June 22, 2006

Sections 2.5.1, 2.5.2, and 2.5.3:

Currently in, the prw-ezz, oif Compilatim, and reqiewQýf,- I't rýa iI,,e, _ýt,,qrf ej Update/ geQlogiQ,,,, geýQphysic.qiýý,, an -,,is Oa ai b,,qse Field reconnaissance

" Preparation of maps (2QO,,,,, 25ý,ý 5-,,,,,, ano Q),.ý mil, Review of EPRJ and other, sej c,,, s. ijr'ý )Mo 'Q Q, Qeý -J-!s

" Any new seismic sources?;

4, Update EPRI source, model o Evaluate potential for surface,, dpformatiQný,

Potential Quaternary Tectonic Features I V4WOmi tS 11130 2 Beakirfaait 3 Pon Brarmi fAul 4 Ca.fwAu 5 ECFZ 6 Owulesom Equoadon fastures.

7 Btufbn Sueabclon feakwes 8 Ge stm kKudaion features 9 E. TN Seiasmic Zone to Cape heac INdwu Barks fault I1 12 Howe Crossroads ftmA 13 Stwieytaw - Wa Hefta btap 14 Penwa~ke fait 0 150 3D0Mlin Fronn Crone and Wheeler 0 1SO 3w IkomeI" (21'000) and Wheeler (20051) Explanation Gimis&Wl Vfelr Feebsu Cis" LAA A 1

.lC C - Ems Coast Fault Symwn

- C We-n.m Fal Lbnm N A h mReowr 40 TWOtXfw femu*dao Wv irw

Regional Tectonic Features Explenation 0 2W0MIed

• C&nA SfmSib4

- Mesozoic RiBft cfth NOOb Basins Pdrksmiu at M.,2003) 1990 miW Faubs

-~ - Poloozoic (KNi ad OAlMan. 1974)

- Meseomoi (ernon 1992)

- Carozoic PAOSOLOCOS) kmk*d PmO LAWd EeC=9 F-f Symn.

Extended Crust (Jolmutan at al 1994)

SIgWl Extended EUpm"huat Epicentera I'mI

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t4 Regona Fault and Lnamet Fro FS I KEY:

SMMAFIC DIKE SWARIMS

' - TRIASIC DIABASE DIKEII

+-FAULTS FOLD AXIS ATIMCLINES-4.

S*CUNES STATUTE MILES -PHOTO LINEARS tO 0 S0 C I0 SOUTH CAROLINA ELECTRIC S SGAS CO.

VIRGIL C. SUMMER NUCLEAR STATION Regional ERTS Photo Linear Map Figure 2.5-10

Eastern Piedmont (Goat Rock) Fault System EPFS, defined as.ý, a, serie, ir-fte f ults

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.3o OjU3 exte n d in g from Al abama, to,, VI'! II rgj nciýa (HatGr eA.

al, 1977)

Goat Rock (AL, G'A)', TQwaJ:I,.,a)' rý'Aý7ý S

ý__' - ( i ý ýý Modoc (GA, SC), Jone, bo slý' . rQ) (Nr; Qn] fO),uilt assoc. with Mesozo.icý blasýin')',, A\ugusf,at (G-"A,-\ S---,\,Q))

Earl 1-cti-I-emy Ion it i-d,--p-

-L eýs of deformation Most faults in system do, not dii Zplace, Triassic.,

diabase dikes (pre-Triassic, age,),

gneiss nsbo Jid Wn compte2x Ic.

Local Geology N~otie

('ivgneft A a GEOLOGY OFTHE CHAPIN, LITTLE

• OUNIAIM. FOMARIA AND JENKINSVILLe OUADRANGLES.

SO1UIH CAROLINA KiOMETERS 0 2 4 a modMed after Secor et al. (1982)

• j - , n) ~ 0,s3(

Abbot 195)

Crtcos Coata Rans0 ,e Sý t,ýK/'r

- a S e al 2001)SS S S I Waee Creek falS'l -of Srs-5*l' "

- v--nG -a -- rhccntin-uat-an- e, f i Se orandnosIipsi e sooJc)0k emplacementS S Ducil shea zon at 0hrote a*~., -a ~i

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.ww m Mrsaw www WID" IEPgW*N Regional Seismicity lI y 1~.

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Updte fo ESeEPr Q, in c EPR infomation* 06 0 6SA Lee 2 process,*

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- EGSV ldACi 1- OMMSM A

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• UCSS (this study) 0.6 USGS (Frankel et al,202) 0.5-m SCDOT (Chapman

'and TaWar, 20

• EPRI composhto 0_0.3 -a- m 0.2 .6-I ii 0.1 I El-a-rn

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6.5 6.6 6.7 6.8 6.9 7 I I I t I7 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 aL 1

8 Magnibide (M)

Updte Chaleto Sesi Souc Logi Tree Porti mfl of Rec urrerce, Data Used. to PaIcoiuc~cir Irvta~rva

• CvnstraIn Mmax Record Used to (CoritinUDzS.

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cua r~r Recu~rrence Model RacurmrIwce dsrbt~

A Charloston (0.70)

--Q.=aO-ye .53 iVoP. (+/-0,245 year~s 6&.7 (0, 10) (mean & -548,years) 84 1 oxp W~i+/-.~) year~s (Mman cf 9JS8 years)