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  • Author or Editor: G. Zeitler x
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Abstract  

Results are given which have been obtained by the application of relatively small252Cf sources for the neutron-activation analysis of vanadium in oils. It could be shown that by optimization the geometrical conditions for activation and counting with a 24 μg252Cf source detection limits down to the order of 1 ppm vanadium are attainable; the absolute error, e.g., at 1.3 ppm is 0.32 ppm.

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Abstract  

An application of distribution coefficients in transport models must take into account, among others, influences of solution-to-solid (V/M) ratios. Therefore, with batch tests the dependence of sorption and desorption coefficients on V/M in rock-groundwater systems of the Gorleben site was investigated. Experiments show that sorption (RS) and desorption (RD) coefficients of Ra, U, Pa and Ac decrease with decreasing liquid/solid ratios. In order to understand the V/M-effect sorption isotherms for different V/M ratios and, moreover, quantities for characterizing specific sorption of nuclides have been measured. The results allow the postulation of a model for describing approximately RS-V/M-relationships of different nuclide/rock/groundwater system with specific parameters.

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