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Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
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2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott Downtown
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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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Industry Update—June 2025
Here is a recap of industry happenings from the recent past:
DOD selects companies for its installations microreactor program
The Department of Defense has selected eight technology companies as being eligible to seek funding for developing microreactor technologies as part of the DOD’s Advanced Nuclear Power for Installations program. That program seeks to “design, license, build, and operate one or more microreactor nuclear power plants on military installations . . . to support global operations across land, air, sea, space, and cyberspace.” The selected companies are Antares Nuclear, BWXT Advanced Technologies, General Atomics Electromagnetic Systems, Kairos Power, Oklo, Radiant Industries, Westinghouse Government Services, and X-energy. Specific objectives of the DOD program are to “field a decentralized scalable microreactor system capable of producing enough electrical power to meet 100 percent of all critical loads” and to “utilize the civil regulatory pathways of the Nuclear Regulatory Commission to stimulate commercial nuclear microreactor technology development and the associated supply chains in the U.S.”
Hiroshi Noguchi
Fusion Science and Technology | Volume 27 | Number 2 | March 1995 | Pages 56-61
doi.org/10.13182/FST95-A11963805
Articles are hosted by Taylor and Francis Online.
The conversion reaction of tritium gas to tritiated water in dry air has been studied using low–concentration tritium gases which have three different hydrogen isotope compositions. The conversion was directly proportional to a ratio of radioactivity of T2 to that of total tritium. This demonstrates that the T2 decay process is predominant for the conversion reaction at low initial tritium concentrations. First-order rate constants for the reaction in dry air are found to be independent of initial tritium concentration. A model to predict the rate constant of the production of tritiated water from T2 in dry air has been developed. The modeling results show that the T2 decay process is predominant at low concentrations, while O+ and N2+ ions formed through tritium beta-ray induced reactions play important roles at high concentrations.
