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Conference Spotlight
2025 ANS Winter Conference & Expo
November 8–12, 2025
Washington, DC|Washington Hilton
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The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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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.
Fred H. Tingey
Nuclear Science and Engineering | Volume 9 | Number 2 | February 1961 | Pages 127-131
doi.org/10.13182/NSE61-A15596
Articles are hosted by Taylor and Francis Online.
The use of hot-spot, hot-channel factors to relate system uncertainties and potential system temperatures in reactor design is fairly standard. In this paper a somewhat different approach is discussed. Translating factors are identified for each base variable in the calculation and through statistical regression analysis and error synthesis, procedures are outlined for approximating to the hot-spot temperature and estimating the associated uncertainty in the calculation. The procedures are applied to a typical ETR calculation.
