Effect of Concrete Wasteform Properties on Radionuclide Migration

Wellman, Dawn M. ; Bovaird, Chase C. ; Mattigod, Shas V. ; Parker, Kent E. ; Ermi, Ruby M. ; Wood, Marcus I.

关键词: AR FACILITIES;    CONCRETES;    DIFFUSION;    DISTRIBUTION;    IRON;    MOISTURE;    RADIONUCLIDE MIGRATION;    SEDIMENTS;    SOILS;    SOLUBILITY;    URANIUM;    WASTE FORMS;   

DOI  :  10.2172/940230
RP-ID  :  PNNL-17808
PID  :  OSTI ID: 940230
Others  :  Other: 830403000
Others  :  TRN: US0807113

学科分类：核能源与工程

美国|英语

来源: SciTech Connect

【 摘 要 】

The objective of this investigation was to initiate numerous sets of concrete-soil half-cell tests to quantify 1) diffusion of I and Tc from concrete into uncontaminated soil after 1 and 2 years, 2) I and Re (set 1) and Tc (set 2) diffusion from fractured concrete into uncontaminated soil, and 3) evaluate the moisture distribution profile within the sediment half-cell. These half-cells will be section in FY2009 and FY2010. Additionally, 1) concrete-soil half-cells initiated during FY2007 using fractured prepared with and without metallic iron, half of which were carbonated using carbonated, were sectioned to evaluate the diffusion of I and Re in the concrete part of the half-cell under unsaturated conditions (4%, 7%, and 15% by wt moisture content), 2) concrete-soil half cells containing Tc were sectioned to measure the diffusion profile in the soil half-cell unsaturated conditions (4%, 7%, and 15% by wt moisture content), and 3) solubility measurements of uranium solid phases were completed under concrete porewater conditions. The results of these tests are presented.