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2025 ANS Winter Conference & Expo
November 8–12, 2025
Washington, DC|Washington Hilton
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Japan gets new U for enrichment as global power and fuel plans grow
President Trump is in Japan today, with a visit with new Prime Minister Sanae Takaichi on the agenda. Takaichi, who took office just last week as Japan’s first female prime minister, has already spoken in favor of nuclear energy and of accelerating the restart of Japan’s long-shuttered power reactors, as Reuters and others have reported. Much of the uranium to power those reactors will be enriched at Japan’s lone enrichment facility—part of Japan Nuclear Fuel Ltd.’s Rokkasho fuel complex—which accepted its first delivery of fresh uranium hexafluoride (UF₆) in 11 years earlier this month.
Heinrich R. Obermoller, David A. White
Nuclear Technology | Volume 96 | Number 3 | December 1991 | Pages 337-345
Technical Paper | Enrichment and Reprocessing System | doi.org/10.13182/NT91-A34594
Articles are hosted by Taylor and Francis Online.
A simple model based on a stage concept that can be used to predict the effects of operating variables on the separation of isotopes by chemical exchange is described. The particular application studied is chemical exchange of uranium isotopes in an ion exchange column that has NT total theoretical stages. Other important operating parameters are the number of stages in the exchange band Ns and the chemical exchange equilibrium constant ∈. A model of the process is developed and simulated by a computer program. The results are correlated to give simple expressions based on the assumption that one-half of the band that emerges from the column is taken as enriched feed with a concentration y. For small values of ∈, the optimum value of Ns is given by 1.313 and y = x0(1 + 0.551∈), where x0 is the feed concentration.
