Enrichment of heavy water by thermal diffusion in countercurrent-flow Frazier scheme inclined for improved performance

The theory for enrichment of heavy water by thermal diffusion in a counterc urrent-flow inclined Frazier scheme was developed and investigated. The equ ations for the optimal angles of inclination and the corresponding best per formance were derived. Considerable improvement in performance is obtained when the Frazier scheme is operated at the optimal angle of inclination. Fu rther improvement can be achieved if the operation is conducted in counterc urrent flow instead of concurrent flow.