ML070720254

06/12/06 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