ML070720250

12/12-13/2006 Slides, Txu Power Comanche Peak Site, NRC Onsite Review, Site Geotechnical Investigation Activities.

ML070720250
Person / Time
Site:	Comanche Peak
Issue date:	12/12/2006
From:	TXU Power
To:	Office of Nuclear Reactor Regulation
References
Download: ML070720250 (25)

Text

4 TXU Power Comanche Peak Site NRC Onsite Review Site Geotechnical Investigation Activities 12-13 December 2006

Agenda and Introduction

• Project Introduction

- Introductions

- Project Background and Status

• Project Organization and QA

• Site Investigations Overview

• Site Orientation

- Site safety briefing

- Logistics

- Site tour

Comanche Peak Site Background

" Multiple reactor technologies considered

• Plant placement designs were developed that enveloped potential reactor technologies

• Multiple placements on the Comanche Peak site were considered before current placement selected

• Geotechnical investigation commenced on borings common to all potential reactor technologies (Phase 1)

• Geotechnical investigations will finalize site characterization after the reactor technology is selected (Phase 2)

• Hydrogeological investigation - including well development performed to investigate groundwater conditions

Project Organization Site Geotechnical Investigations TXU Power Enercon Services COLA Development WLA Fugro Seismic, Geologic & Site Geotechnical Geotechnical Characterization Investigations T

Support Support Subcontractors Subcontractors

Project Organization Responsibilities Site Geotechnical Investigations

• TXU Power

- Site owner

• Enercon Services, Inc.

- COLA contractor for TXU Power

- Providing QA oversight for geotechnical investigation activities as well as managing interface with site owner

• Enercon Subcontractors

- William Lettis & Associates, Inc. (WLA) - Provides Overall Technical Direction for Geological, Geotechnical and Seismological Studies

- Fugro - Implementation of Site Characterization Activities; i.e.,

Drilling, Well Installation, Laboratory Testing, Geotechnical Engineering Services

Site Investigation/Data Collection Quality Assurance I TXU Power I I

I, Enercon QA Program I Contracted to perform work under LEnercon QA program ]

I Plan Document Enercon QA Project

[ Enercon Project Instruction (P1-02) 4-I-

Includes drilling, well installation, surface and downhole geophysical testing, geologic mapping, and laboratory testing.

• Data Collection Plan

• Work Plan (DCP)

• lnstructions-Preparation of DCP

• lnstructions-Preparation of Work Plan

• Instructions-Preparation of Work Instructions

• Document Control Register JI

Quality Assurance

• TXU contracted Enercon Services to perform COLA development under the Enercon Services' QA Program

• Geotechnical field investigation, laboratory testing, and engineering analysis performed by William Lettis &

Associates and Fugro is performed under the Enercon Services' Quality Assurance Project Plan

Geologic and Geotechnical Site Characterization

• Characterize subsurface with existing (FSAR) and new data

• Sufficient new exploration to confirm and refine site stratigraphy

• Evaluate site subsurface variability

• Develop site profile for ground motion response

" Identify possible geologic hazards

• Verify Vendor plant design parameters

" Prepare Conceptual Foundation/Geotechnical Design

• Characterize groundwater conditions (water table, confined aquifers, dewatering requirements)

• Evaluate rock excavatibility and excavation support

Exploration Protocol

" Work will follow formal Enercon QA Program

" Performed by qualified, experienced geologists/engineers

" Senior Review (licensed professionals)

" Formal Internal Technical Review (ITR)

" Conformance to NRC RG 1.132, RG-1.138

" Satisfy vendor and SSI data requirements

ffxpkwionb of0004"k~Uafts OU* i- & . 04

• - W-u-q L-w am mAWmr wo.

ws.

An owom Explamallon P0 -. ON Somm;. G~oIM *ad foul daft derdwd "om "in &Bekmui (1974).

• owh PI*S 01o50 SOf UAI ~oCffi Pau" 0 100 200 kfn ED mm

!xpbusU.n - GsoIm~m Ufta jGs~Ie Mm of Tmas~

- a

r. Wa,

~fl, ~

~ - Lfl0S l a, -

- .#4'4 lIt - -

~ - a,~t a N

lIt W~.a that atta, *~~~4t tatI, a,- ,~ it- fl - tatin.c.. -

Ir*t-.a tat 345 aaatha Itrtl

'atal laW 0 Cfl~flU bIll

- c,.~taaaal Ittw.at '4

• U

~ - - - ~taam Ia; ra flaIl atlC.l'tllat tlttttl Itlalt,, tal11ata ,a taltlal IfI t fllltall .la nl.at' bw, 11 th In..,

'AOSW't alIt. ,,'4 qnbt 'tatIt twIlIt wIle a tIn., I alt.4 hAtS 'tama wet laIttOl .t*i lwtaa, 1111 ,tt.sbttl wIn ScIwttt't a.

U (3w ha. tlSllS,11SS 1.51II III -latt.*lawlwlI la,gIty SIflhll'Ih

'tIll atOllSlIlt atwIttIt alItI,,

M' Ia lOll 51-qua NVa.tlt.SltaShl 6111 lOll ,,hlt C

• 4Il. 1*1 ltt,. WIth lattoata a,, MIlaS IllSIaSl,.W.t 8~irce G*.Iogyiht. dst*ed tom MwOedo~e AMa.ofTexas ~ Oval 15 fl*WtS J~II~a. tout MwTexas COKWI~SI~O.tOatEffVkOOmWt5~ QUSKy (TCEQ).

C ni I

• Coqane PogOf 03 2ft tilecnIss M l~ rus o

Field Exploration Methods

• Standard Penetration Testing

• Seismic Refraction and Gravity (SPT) (Phases 1 and 2) (Phase 2)

• Rock Coring (NQ, HQ sizes)

• Spectral Analysis of Surface (Phases 1 and 2) Waves (SASW) (Phase 2)

• Borehole Pressuremeter Testing

• Borehole Packer Testing (Phase 2)

(Phase 2)

• Cone Penetration Test (CPT)

• Seismic Downhole and P-S Soundings (Phase 2 potential)

Suspension Velocity

• Groundwater Monitoring Wells Measurements (Phases 1 and 2)

(Phase 1)

• Borehole Televiewer Profiles

• Geologic Mapping (Phase 2)

(Phases 1 and 2)

• Gamma and Caliper Profiles

• Test Pit Excavation and Mapping (Phases 1 and 2) (Phase 2)

-!I V

22 --. 1 1; k

I r - -I. - - - 1

_____ ~~~~2

MONTHLY PROGRESS REPORT NO. 10 PERIOD ENDING AUGUST 31, 1975 2" ~"'.

NUMBER 87 TEXAS UTILITIES SERVICES, INC.

AUGUST 8, 1975 COMANCHE PEAK STEAM ELECTRIC STATION 1980-82 2300 MW INSTALLATION TURBINE GENERATOR AREA. BOTTOM-PUMPING CONCRETE INTO UNIT 1 CIRCULATING WATER DISCHARGE TUNNEL; TOP-SCALING SOUTH EXCAVATION WALL. VIEW TO SOUTHWEST

A W 11207 -- 1120 1020- UNIT I UNIT 2 H- 1020 920 920 82 0 -, -- - -------

820-I 720 1 720 4 9j r ~~

wi¢ 15'GenRs V t z~m r I'('*11 520 - -3 ' 520 420 .--* ..... 44. 420 320- L 32 P-S 500' 100 200 300 400 500 feet Notes:

0 1. Structures are schematic

2. No vertical exaggeration Scale

'v-( 1/4 0

I 7

"Iý7

- I C,~

!ýý7

-l II I

~ h

--- F it .I m*

/

- 3.

I r

-/ý U A'

1'~-l t

~- -~

ýn

• ~

a,. ~-1 AI

- 3 3~

2 - "~'-~ #'2

.- -~-~-* /

-'.1 S N

Laboratory Testing Program GEOTECHNICAL INDEX GEOTECHNICAL INDEX Moisture Content and Petrographic Thin Section Density Carbonate Content Consolidation Specific Gravity X-Ray Diffraction/Mineralogy Corrosion Grain Size Proctor Atterberg Limits and Indices California Bearing Ratio (CBR)

(soil) Test Slaking Durability (core)

Organic Content

Laboratory Testing Program GEOTECHNICAL STRENGTH DYNAMIC TESTING Unconfined Compression (core) X-ray of UD Samples Prior to Shipping Unconfined Compression with Resonant Column/Torsional Shear Testing Modulus (core) (University of Texas - Austin)

Unit Weight and Density (core) Lab Shear Wave Velocity (modulus)

Triaxial CU (3-point)

Direct Shear (3-point)

Project Organization Responsibilities Site Geotechnical Investigations

• WLA provides field project management for geotechnical and geologic data collection tasks

" WLA Site Coordinator provides supervision of the day-to-day field activities

• Rig Geologist is assigned full-time with a drill rig.

Responsibilities include:

- Verify drilling or testing operations are conducted in conformance with specified procedures

- Document sample or test depths and test results

- Maintain field logs of borings, including classification of materials recovered and description of geotechnical soil properties

- Chain-of-custody document preparation and logging samples

Geotechnical Borehole Procedure

" Work Instructions issued to drilling companies and Rig Geologists defining duties

• Boring Assignments for each borehole prepared by WLA Site Coordinator. Boring assignments specify:

- Boring location

- Boring type

- Boring depth

- Required tests

- Boring Completion

• Rig Geologist directs Drill Crew to prepare drill site and perform drilling per Boring Assignment

• Rig Geologist monitors drilling, describes samples, maintains field log

• Modifications to Boring Assignment instructions, if needed, reviewed and approved by Site Coordinator

• Samples transported to site storage facility at end of each day

Current Site Activities

• Borings

- 22 geotechnical borings completed or in progress

• Testing

- Caliper

- Gamma

- Seismic Downhole and P-S Suspension Velocity Measurements

- Borehole Televiewer Profiles

• Monitoring Wells

- 20 monitoring well clusters installed

Safety

" Personal protective equipment requirements

" Incident reporting (including near misses)

• Inclement weather precautions

• Potential hazardous insects/reptiles

• Plant access requirements

Q&A