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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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Latest News
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.
Charles R. Marotta
Nuclear Technology | Volume 76 | Number 3 | March 1987 | Pages 420-422
Technical Note | Fission Reactor | doi.org/10.13182/NT87-A33927
Articles are hosted by Taylor and Francis Online.
A simple calculational method is developed that can quickly and accurately estimate total control rod worth for a class of reactors possessing fuel/control channel symmetry throughout its core. The movable, nonfissionable, poisoned control channel has identical neutron absorption and scattering properties and geometry similar to the fuel channels. Hexagonal lattices employed in fast breeder and graphite-moderated thermal reactors possess the necessary fuel/control lattice symmetry with spectrally innocuous coolants for both channels (sodium or helium both for fast and thermal systems) required to apply the method. The number of fuel and control channels is the parameter determining control worth and is tantamount to estimating by inspection. It is applied to eight fast sodium-cooled reactors and four thermal-, sodium-, or helium-cooled, graphite-moderated reactors. The Δk/k estimated worths are generally better than ±20% plant values.
