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!

4. 3 L %

,Q; 4'_,

~rH F~ 3f I 3

(S)

R-4

,-326 B-303 8-.332 8-330

[OH)

B -328 B-331 CS)

B-329

F3orings: HQ Size (26 total) 2 2

.8 8

ý6 to to to to to 350 215 175 150 115 ft ft ft ft ft depth depth depth depth depth (1

r(1 (3

(2 (2

completed) completed) completed) completed) 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) 1 Ito 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 Saprolite PWR MWR Sound Rock 0-17 ft 17-37 ft 37-50 ft 5.50-62 ft

>62-ft 0-33 ff 37-51 ft 51-57. ft 57-61 ft

>61 ft

III a

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m

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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

• 2011 SCOL Approval (42 Months)

- Initiate Safety Related Construction

- Plant Operation

• 201 5

9 p

-p

-T SCE&G NProject Organization (Geotechnical Contacts)

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T04EM HOMLDINGaa (MEONTICELLO RECREATION AREA)

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Petes 205 SMonticello St. Johns,

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J BrownsvleRF RENE FREESUT 3M.LES 6

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THE BAEIMRTITS MAP WARR PREPAEDVO F

1.1

• !i*ENHPORTIONS OF THENTIC LLOWRINGRVOUTH PCAROL 8

1 tula STAT H IRGHWA DEPARTME NT GEER A

STA ION SOUEWR EARIIQA*.

e SECURIT A

MAP FoArcIRFITEL VCOUN ITY 192,RVIE P17 GATESTHlnsMl.

NWER CUT 91 EIE 90

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 I i,,e, _

ýt,, q rf ej Update/ geQlogiQ,,,, geýQphysic.qiýý,, an -,,i s 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 Fronn Crone and Wheeler (21'000) and Wheeler (20051)

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 I1 INdwu Barks fault 12 Howe Crossroads ftmA 13 Stwieytaw

- Wa Hefta btap 14 Penwa~ke fait 0

150 3D0Mlin 0

1SO 3w IkomeI" Explanation Gimis&Wl Vfelr Feebsu Cis" LAA A

1

.lC C - Ems Coast Fault Symwn C We-n.m Fal Lbnm A

h mReowr 40 TWOt X fw femu*dao N

Wv irw

Regional Tectonic Features Explenation 0

2W0 MI ed

• C

&nA SfmSib4 Mesozoic RiBft Basins cfth NOOb 1990 miW Pdrksmiu at M., 2003)

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

4.

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&WIS..

50 901 4M-04,70 605 $100

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Regona Fault and Lnamet Fro FS t4 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

ýf; w4pýafa

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

al, 1977)

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

rý'Aý7ý S

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( i ý ýý Modoc (GA, SC), Jone, bo slý'. rQ) (N r; Qn]

fO),uilt assoc. with Mesozo.icý blasýin')',, A\\ugusf, at (G -"A,-\\

S---,\\, Q))

Earl

-L 1 -ct i -I -em y I on i t i -d,- -p-eýs of deformation Most faults in system do, not dii Zplace, Triassic.,

diabase dikes (pre-Triassic, age,),

Local Geology gneiss nsbo Jid compte2x Wn Ic.

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)

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n) 0,s3(

Abbot 195)

Crtcos Coata Rans0

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Waee Creek fal S'l

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sooJc)0k emplacementS S

Ducil shea zon at 0hrote a*~., -a

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mmw Mrsaw WID" IEPgW*N Regional Seismicity lI y

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EPR infomation*

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process,*

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• ul SvtOP EG SV ldACi 1-OMMSM 0

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0.7 -

V 0.6 0.5-

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USGS (Frankel et al, 202) m SCDOT (Chapman

'and TaWar, 20

• EPRI composhto 0_0.3

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ii I

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a El-a-rn rninm 6

i 6.5 6.6 6.7 6.8 6.9 7 7.1 7.2 7.3 7.4 Magnibide (M)

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7 7.5 7.6 7.7 7.8 7.9 8

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

• CvnstraIn Mmax Record Used to (Coritin UDzS.

SO zro e! r~r cua Recu~rrence Model RacurmrIwce dsrbt~

A Charloston (0.70) 6&.7 (0, 10)

--Q.=aO-ye

.53 iVoP. (+/-0,245 year~s (mean & -548, years) 84 1 oxp W~i+/-.~) year~s (Mman cf 9JS8 years)