ML070720254

Unistar Nuclear, Calvert Cliffs, Ccnpp Usepr Site Layout and Subsurface Investigation

ML070720254
Person / Time
Site:	Calvert Cliffs
Issue date:	06/12/2006
From:	UniStar Nuclear
To:	Office of Nuclear Reactor Regulation
References
Download: ML070720254 (11)

Text

UnuStar NU CLIE A R rr u t and Subsurface Investigatio NRC Meeting 6/12/06 06/12/06 I

Agenda

• Monday:

- Meet NRC at UniStar site HQ

- Presentations on site activities and QA/CAP programs

- Safety briefing

- Narrated van tour of site

- NRC witness site activities

- Conclude

• Tuesday:

- All meet at site

- Continue with site activity review/discussion

- Meet reps from MD DNR

- NRC exit observations 06/12/06 2

Overview of Site Description and New Plant Layout Study

• CCNPP Site Description

• Site Layout Study

- Evaluation categories:

" Environmental

" Land use and Zoning

" Construction Considerations

" Construction Facility Considerations

" Switchyard Considerations

" Security

• Permanent Facility Considerations

• Impact to Existing Facilities 06/12/06 3 06/12/06 3

New Plant Layout Study Go/no-go criteria

" Compliance with CWA 316 (a) & (b)

" Minimal impact to threatened and endangered species (tiger beetles, eagles)

" Impact to Transmission Corridors

" Impact to cemeteries

" Proximity to hazardous pipelines

" Unknown subsurface conditions 06/12/06 4 06/12/06 4

Site Layout Study Results (cont.)

• Narrowed down to two options (north & south)

• Each option has three (3) variations of cooling towers

- Forced draft

- Natural draft

- Hybrid

- Selection criteria

• Height, land use, plume, salt drift, power needs, cost, noise, etc .......

• BOP study is in progress South option selected as the base case for CCNPP COLA 06/12/06 5 06/12/06 5

Subsurface Investigation Purpose

- Develop subsurface investigation locations for potential Units 3 and 4 power blocks at Calvert Cliffs, plus switchyard, proposed cooling tower configuration, heavy haul road, and intake and discharge piping locations.

- Developed and implemented under Bechtel's QA Program 06/12/06 6

Subsurface Investigation References

- Basis for boring locations is derived from guidance obtained from relevant elements from:

" Regulatory Guide 1.132

" Regulatory Guide 1.138

" Regulatory Guide 1.198

" Regulatory Guide 1.70 P NQA-1, 1994, Subpart 2.20 06/12/06 7 06/12/06 7

Subsurface Investigation

• Documents Prepared

- Calculation, "Basis for Subsurface Investigation"

- Core Bore Location Drawings

- Technical Specification

- Detailed Procedures and Workplans 06/12/06 8

Subsurface Investigation

• Subsurface Investigation Scope

- Standard Penetration Tests (40' to 400')

- Ground Water Observation Wells (50' or 100')

- Cone Penetrometer Tests (50' or 100')

- Field Electrical Resistivity (4 tests, spacing up to 300')

- Borehole Geophysical Logging (400' and some 200')

- Suspension P-S Velocity Logging (400', some 200')

- Bulk Sampling from Test Pits (20 pits)

• Laboratory Testing of Selected Samples 06/12/06 9

Subsurface Investigation - QA Program Site Characterization is performed under the Bechtel Power Corporation QA program

- Subcontractors are also working under Bechtel's QA program

- QA oversight is provided:

" at start of each work task

" periodically UniStar observes site characterization activities to ensure quality meets UniStar expectations 06/12/06 10 06/12/06 10

Subsurface Investigation - Corrective Action Bechtel is responsible for corrective action program implementation:

- Issues have been identified and corrective actions taken 06/12/06 I1I 06/12/06 11