HEAVY WATER ENRICHMENT BY THERMAL DIFFUSION IN THE FLAT-PLATE FRAZIER SCHEME WITH COLUMN HEIGHTS INCREASED AT A CONSTANT RATIO FOR IMPROVED PERFORMANCE

摘要

This study investigates heavy water enrichment using the Frazier scheme of flat-plate thermal diffusion columns with the column number adjusted and the column heights varied at a constant ratio with the total sum of column heights fixed. The equations for predicting the best number of columns and the best column-height ratio for maximum separation are derived. Considerable improvement in performance is obtainable if the column-height ratio and/or column number in a modified Frazier scheme are properly assigned, instead of using the conventional Frazier scheme of uniform column height with the same total sum of column heights.