Basalt-radionuclide distribution coefficient determinations. FY-1979 annual report

Abstract

Experimental radionuclide distribution coefficients (Kd ') were determined for Pomona, Flow E, Umtanum basalts, and secondary mineralization associated with the Pomona basalt at 23°, 60° and 150°C. Radionuclides used were 75 Se ,

Waste/Rock Interactions Technology Program: the status of radionuclide sorption-desorption studies performed by the WRIT program

“…A strong system agitation rate is suspected as causing sample abrasion which exposes new surfaces (increases surface area) and increases the chances that fine suspended particulates may be present in solution [Barney and Brown (1980) and Ames and McGarrah (1980)J. In general these fine particles have adsorbed nuclides on their surface and often they remain in the solution phase during solid/solution separation steps.…”

“…Further work is necessary to evaluate the observed Rd dependency on solution to solids ratio [Daniels et ale (1981), Dosch and Lynch (1980) and Ames and McGarrah (1980)] and to quantify the surface area relationship between disaggregated and intact material.…”

Development of backfill material as an engineered barrier in the waste package system- Interim topical report

“…Sorption measurements on granite {Neternieks 1977} and basalt (Ames and McGarrah 1980) indicate that Kds for some elements (i.e., strontium) increase with increasing temperature while those for other elements (i.e., cesium) decrease with increasing temperature. Sorption measurements do not distinguish between various mechanisms for removing ions from solution, which may be relatively complex.…”

Sorption-Capacity Limited Retardation of Radionuclides Transport in Water-Saturated Packing Materials

“…[2,4,5] The West Chestnut Ridge Data [2] are nore conprehensive in that nore data points for a wider range of concentrations are reported. Basec on tnese data, a typical uranijr.…”

“…Tnt basalt sc-ption data [3,4,5] are more sparse^es only £ •-"e* -aoints are available fcr each sorpticn isotherm and the concen^ratio'r, -a«ce is linited.…”