National Technical Reports Library

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Drilling and Sampling in Hanford's Highly Radioactive Environment.

DE2003805633

Publication Date	2000
Personal Author	Sydnor, H. A.
Page Count	9
Abstract	In the summer of 2000, a drilling and sampling program was performed to assess the highly radioactive contaminated vadose zone adjacent to and beneath the 241-SX-108 Single-Shell Tank (SX-108-SST) located at the Hanford Sites in Washington State. The drilling and sampling effort was designed to retrieve contaminated samples where cesium-137 concentrations could be at the theoretical maximum concentration. Handling of drill cuttings at this concentration was not an option because dose rates to workers would have been several R/hr. A special drill rig and drilling and sampling system were designed, constructed, and fully tested to advance a casing string at an angle to collect periodic samples without damaging the SX-108 SST, generating any unnecessary wastes or exposing workers to excessive radiation.
Keywords	Radioactive materials Sampling Drilling Hanford Reservation Site characterization Soil chemistry Boreholes Soils
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	CH2M Hill Hanford Group, Inc., Richland, WA.; Department of Energy, Washington, DC. Assistant Secretary for
Supplemental Notes	Sponsored by Department of Energy, Washington, DC. Assistant Secretary for Environmental Management.
Document Type	Technical Report
NTIS Issue Number	200319

Drilling and Sampling in Hanford's Highly Radioactive Environment.

Drilling and Sampling in Hanford's Highly Radioactive Environment.
DE2003805633

Publication Date	2000
Personal Author	Sydnor, H. A.
Page Count	9
Abstract	In the summer of 2000, a drilling and sampling program was performed to assess the highly radioactive contaminated vadose zone adjacent to and beneath the 241-SX-108 Single-Shell Tank (SX-108-SST) located at the Hanford Sites in Washington State. The drilling and sampling effort was designed to retrieve contaminated samples where cesium-137 concentrations could be at the theoretical maximum concentration. Handling of drill cuttings at this concentration was not an option because dose rates to workers would have been several R/hr. A special drill rig and drilling and sampling system were designed, constructed, and fully tested to advance a casing string at an angle to collect periodic samples without damaging the SX-108 SST, generating any unnecessary wastes or exposing workers to excessive radiation.
Keywords	Radioactive materials Sampling Drilling Hanford Reservation Site characterization Soil chemistry Boreholes Soils
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	CH2M Hill Hanford Group, Inc., Richland, WA.; Department of Energy, Washington, DC. Assistant Secretary for
Supplemental Notes	Sponsored by Department of Energy, Washington, DC. Assistant Secretary for Environmental Management.
Document Type	Technical Report
NTIS Issue Number	200319