ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
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!
Latest Magazine Issues
Apr 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
May 2025
Nuclear Technology
April 2025
Fusion Science and Technology
Latest News
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
Gregory Mathieu, Amélie de Hoyos, (Inst de Radioprotection et de Sûreté Nucléaire), Sitakanta Mohanty, Stuart Stothoff, Michael Muller (CNWRA)
Proceedings | 16th International High-Level Radioactive Waste Management Conference (IHLRWM 2017) | Charlotte, NC, April 9-13, 2017 | Pages 380-388
Simulations that combine flow modeling with radionuclide transport modeling provide insights into the performance of a hypothetical geologic repository for radioactive waste. Key parameters driving performance can be identified and quantified using probabilistic sampling of the model parameters. This paper presents a probabilistic framework, referred to as the MC-MELODIE hydrologic flow and contaminant transport model, for analyzing flow and transport behavior in the context of intermediate level long-lived (ILLLW) and high-level (HLW) disposal in a deep geological formation at the Meuse/Haute-Marne (MHM) site in France. The flow and transport framework includes nested, but separate, simulations with common parameters in order to consider small-scale features (detailed drift and shaft configurations) within the repository formation while also considering large-scale (regional) release. Specific analyses use one-million-year simulations with a conservative tracer and assuming instantaneous failures and steady flow to examine the effect of repository layout on radionuclide transfer to the surrounding aquifers through the host formation and engineered features, and to illustrate how uncertainties in far-field conditions and potential future human activities may affect the fate of released radionuclides.