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Division Spotlight
Nuclear Nonproliferation Policy
The mission of the Nuclear Nonproliferation Policy Division (NNPD) is to promote the peaceful use of nuclear technology while simultaneously preventing the diversion and misuse of nuclear material and technology through appropriate safeguards and security, and promotion of nuclear nonproliferation policies. To achieve this mission, the objectives of the NNPD are to: Promote policy that discourages the proliferation of nuclear technology and material to inappropriate entities. Provide information to ANS members, the technical community at large, opinion leaders, and decision makers to improve their understanding of nuclear nonproliferation issues. Become a recognized technical resource on nuclear nonproliferation, safeguards, and security issues. Serve as the integration and coordination body for nuclear nonproliferation activities for the ANS. Work cooperatively with other ANS divisions to achieve these objective nonproliferation policies.
Meeting Spotlight
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
Standards Program
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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RP3C Community of Practice’s fifth anniversary
In February, the Community of Practice (CoP) webinar series, hosted by the American Nuclear Society Standards Board’s Risk-informed, Performance-based Principles and Policies Committee (RP3C), celebrated its fifth anniversary. Like so many online events, these CoPs brought people together at a time when interacting with others became challenging in early 2020. Since the kickoff CoP, which highlighted the impact that systems engineering has on the design of NuScale’s small modular reactor, the last Friday of most months has featured a new speaker leading a discussion on the use of risk-informed, performance-based (RIPB) thinking in the nuclear industry. Providing a venue to convene for people within ANS and those who found their way online by another route, CoPs are an opportunity for the community to receive answers to their burning questions about the subject at hand. With 50–100 active online participants most months, the conversation is always lively, and knowledge flows freely.
Toshiaki Ohe, Akira Nakaoka
Nuclear Technology | Volume 61 | Number 3 | June 1983 | Pages 540-546
Technical Paper | New Directions in Nuclear Energy with Emphasis on Fuel Cycles / Radiation Biology and Environment | doi.org/10.13182/NT83-A33179
Articles are hosted by Taylor and Francis Online.
A generalized equation for adsorption of 131I2 gas on geological material was used. Adsorption parameters for typical Japanese geological materials such as granite, tuff, and sandstone are evaluated as a function of temperature and surface area of rock material. Crushed sample investigations have been performed by the column technique at various steps of temperature and gas concentration. The results indicate that the isosteric differential heat of adsorption is in the range of 63 to 92 KJ / mol at 20°C and that the adsorption coefficient depends on temperature and concentration. Water vapor in 131I2 gas also affects the coefficient, which corresponds to the surface roughness of geological material. A generalized equation is derived on the basis of considering the size distribution of geological materials in order to evaluate the adsorption coefficients at various temperatures. By using this equation, the coefficients of intrafault materials in Japanese granite formations are evaluated at ∼103 cm3/g.
