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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
2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott Downtown
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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Smarter waste strategies: Helping deliver on the promise of advanced nuclear
At COP28, held in Dubai in 2023, a clear consensus emerged: Nuclear energy must be a cornerstone of the global clean energy transition. With electricity demand projected to soar as we decarbonize not just power but also industry, transport, and heat, the case for new nuclear is compelling. More than 20 countries committed to tripling global nuclear capacity by 2050. In the United States alone, the Department of Energy forecasts that the country’s current nuclear capacity could more than triple, adding 200 GW of new nuclear to the existing 95 GW by mid-century.
J. W. Dias, D. Okrent, R. C. Erdmann
Nuclear Technology | Volume 24 | Number 1 | October 1974 | Pages 20-32
Technical Paper | Reactor | doi.org/10.13182/NT74-A31458
Articles are hosted by Taylor and Francis Online.
An explanation was sought to explain the existence of the relatively large (∼2000 Å) fission gas bubbles found in the unrestructured region of an EBR-II-irradiated mixed-oxide pin following a TREAT transient in which peak temperatures stayed below melting. Using a code like GRASS, it was found difficult to explain their existence by employing the bubble mobility values fit to experimental measurements in the region of 1500°C. A rather good fit was obtained if the greater bubble mobility that theory gives for the surface-diffusion mechanism was assumed to be applicable at higher temperatures; e.g., above 1800°C. Sensitivity studies showed that swelling is very sensitive to peak temperatures and the duration of the transient and to hydrostatic pressures in the fuel. If the surface-diffusion mechanism is applicable, considerable fuel swelling can occur due to bubble growth and coalescence. In addition, bubble drift due to temperature gradient is found to equal or exceed the effects of Brownian motion.
