ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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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
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver 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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Nuclear Science and Engineering
June 2025
Nuclear Technology
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May 2025
Latest News
Industry Update—May 2025
Here is a recap of industry happenings from the recent past:
TerraPower’s Natrium reactor advances on several fronts
TerraPower has continued making aggressive progress in several areas for its under-construction Natrium Reactor Demonstration Project since the beginning of the year. Natrium is an advanced 345-MWe reactor that has liquid sodium as a coolant, improved fuel utilization, enhanced safety features, and an integrated energy storage system, allowing for a brief power output boost to 500-MWe if needed for grid resiliency. The company broke ground for its first Natrium plant in 2024 near a retiring coal plant in Kemmerer, Wyo.
V. F. Baston, K. J. Hofstetter, Richard F. Karuhn
Nuclear Technology | Volume 83 | Number 2 | November 1988 | Pages 216-227
Technical Paper | Material | doi.org/10.13182/NT88-A34164
Articles are hosted by Taylor and Francis Online.
Defueling operations at Three Mile Island Unit 2 involve underwater plasma arc cutting of reactor vessel stainless steel components. Sampling and analysis of released off-gases and aerosols during steady-state plasma arc cutting tests established a conversion fraction of nitrogen-to-nitrogen oxides, off-gas composition, and aerosol concentrations for engineering evaluations of potential health and safety and corrosion issues. The sample results indicate that (a) <1 vol% of nitrogen is converted to nitrogen oxides, (b) the airborne particulate concentrations for the major steel components (chromium, iron, nickel, etc.) could exceed the threshold limit values without off-gas capability, (c) the volume percent hydrogen could exceed its lower flammability limit without off-gas capability, and (d) there is low corrosion potential for off-gas system components for the given torch operations.
