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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.
Weston M. Stacey, Jr.
Nuclear Science and Engineering | Volume 33 | Number 2 | August 1968 | Pages 162-168
Technical Paper | doi.org/10.13182/NSE68-A20654
Articles are hosted by Taylor and Francis Online.
The problem of controlling xenon-power spatial transients in a large thermal power reactor is formulated in terms of the dynamic programming formalism. This formulation results in a computing algorithm that can be used to select the control action that optimizes some performance index from among a predetermined set of allowable control sequences. An application of this formalism to a relatively detailed three-dimensional reactor model is presented.
