ML21272A011
| ML21272A011 | |
| Person / Time | |
|---|---|
| Issue date: | 01/28/2020 |
| From: | Thomas Weaver Office of Nuclear Regulatory Research |
| To: | |
| S. Stovall | |
| Shared Package | |
| ML21272A001 | List: |
| References | |
| Download: ML21272A011 (19) | |
Text
Data for Eastern U.S. Site Thomas Weaver NRC Site Response SSHAC Level 2 Workshop January 28, 2020
Objectives
- Define the site stratigraphy
- Geologic materials
- Reference rock location
- Collect
- Shear wave velocity data
- Dynamic property data
Site Location
SRS Stratigraphic Cross-Section SRS Geology/Hydrology Environmental Information Document (1999)
~Site
Top of Basement Rock Site SRS Geology/Hydrology Environmental Information Document (1999)
Nearby Shear Wave Velocity Tests
(-433.9)
(-434.6)
(-696.9)
Site Investigation
Geotechnical Cross Section
Shear Wave Velocity Profile
Shear Wave Velocity Profile
Dynamic Soil Properties
- Dynamic testing performed by Stokoe et al.
1995
- G/Gmax and Damping primarily dependent on soil type and geologic formation
- Dynamic properties were extrapolated for deep layers
- Inverse correlation exists between shear stiffness and damping ratio from torsional shear test data
G/Gmax and Damping Reference Strain, r(%)
Formation Description Number of Tests Mean Dmin (%)
mean mean +
mean -
Stiff Upland Sands 3
1.03 0.021 0.031 0.014 Tobaccor Road and Snapp Sands 18 0.61 0.044 0.059 0.033 Dry Branch, Santee, Warley Hill, and Congaree Sands 25 0.88 0.077 0.109 0.051 Four Mile Sands and any other Unrepresented Shallow Sands 46 0.71 0.066 0.107 0.044 Shallow Clays 4
1.36 0.148 0.246 0.103 Deep Sands 0.53 0.111 0.221 0.068 Deep Clays 1.06 0.23 0.493 0.143
Upland Sands
Tobacco Road and Snapp Sands
Dry Branch and Santee Sands
Shallow Clays
Summary
- Depth to reference rock
- ~Elev. -600 ft (-183 m)
- Shear Wave Velocity
- SCPT at site, upper ~150 ft (46 m)
- Suspension, Crosshole, and Downhole from nearby sites to extend Vs to reference rock
- SRS specific dynamic testing completed to estimate modulus degradation and damping curves.
Acknowledgements
- U.S. Department of Energy
- Brent Gutierrez, Ph.D., P.E.
- Savannah River Site
- Rucker Williams, P.E.