Solvent extraction calculation model for Purex process in pulsed sieve plate column.

概要

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A new calculation code PULCO has been developed to simulate the Purex extraction process in a pulsed column. The model for the PULCO code is based on the mass transfer taking place at the interface between dispersed drops and continuous phase fluid. The following physical quantities of the moving drop are included in the model for each period of drop motion in a pulsed column : (1) Mass transfer coefficient from liquid drop to continuous phase (2) Diameter and velocity of moving drop in the pulsed column (3) Holdup of dispersed and continuous phases in the pulsed column (4) Longitudinal dispersion coefficient in the pulsed column. To establish the validity of the PULCO code, experiments were performed using a 50 mm diameter pulsed column which had a sieve plate section height of 2 m and plates spaced 50 mm apart. The experiments were performed by a tests with use of unirradiated U and Pu. The experimental concentration profiles fitted well with the calculated concentration profiles.
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