Prediction Models for Plutonium, Strontium, Uranium and Neptunium Loading onto Monosodium Titanate (MST)

Fondeur, F. F. ; Hobbs, D. T. ; Barnes, M. J. ; Peters, T. B. ; Fink, S. D.

Savannah River Site (S.C.)

关键词: Uranium;    12 Management Of Radioactive Wastes, And Non-Radioactive Wastes From Nuclear Facilities;    Neptunium;    Radioactive Waste Processing;    Kinetics;   

DOI  :  10.2172/881516
RP-ID  :  WSRC-TR-2004-00608
RP-ID  :  DE-AC09-96SR18500
RP-ID  :  881516

美国|英语

来源: UNT Digital Library

【 摘 要 】

The DA isotherm parameters for U, Pu, Sr and Np have been updated to include additional data obtained since the original derivation. The DA isotherms were modified to include a kinetic function derived by Rahn to describe sorbate loading from the beginning of sorption up to equilibrium. The final functions describe both kinetic and thermodynamic sorption. We selected the Rahn function to describe radionuclide sorption because it originates from diffusion and absorption controlled sorption. An investigation of the thermal behavior of radionuclide sorption on MST as shown by this data revealed the sorption process is diffusion (or transport) controlled (in solution). Transport in solution can in theory be accelerated by vigorous mixing but the range of available mixing speed in the facility design will probably not be sufficient to markedly increase radionuclide sorption rate on MST from diffusion-controlled sorption. The laboratory studies included mixing energies hydraulically-scaled to match those of the Actinide Removal Process and these likely approximate the range of energies available in the Salt Waste Processing Facility.