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
Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
Meeting Spotlight
Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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
Senate committee hears from energy secretary nominee Chris Wright
Wright
Chris Wright, president-elect Trump’s pick to lead the U.S. Department of Energy, spent hours today fielding questions from members of the U.S. Senate’s committee on Energy and Natural Resources.
During the hearing, Wright—who’s spent most of his career in fossil fuels—made comments in support of nuclear energy and efforts to expand domestic generation in the near future. Asked what actions he would take as energy secretary to improve the development and deployment of SMRs, Wright said: “It’s a big challenge, and I’m new to government, so I can’t list off the five levers I can pull. But (I’ve been in discussions) about how to make it easier to research, to invest, to build things. The DOE has land at some of its facilities that can be helpful in this regard.”
Yoichi Watanabe, Jacob Appelbaum, Isaac Maya
Nuclear Science and Engineering | Volume 110 | Number 2 | February 1992 | Pages 109-127
Technical Papers | doi.org/10.13182/NSE92-A23881
Articles are hosted by Taylor and Francis Online.
The combination of a gaseous core fission reactor with a magnetohydrodynamic (MHD) generator can lead to more efficient conversion of fission energy to electricity than can conventional conversion systems. A system concept currently being investigated utilizes uranium tetrafluoride (UF4) as fuel and potassium or potassium fluoride (KF) as the working fluid. The electrical conductivity of the gas greatly influences the performance of the MHD generator. It is possible to enhance the electrical conductivity by taking advantage of fission fragment ions born in the fissile gas-working gas mixture. To study and quantify this effect, a chemical reaction model as well as a physical model are developed. The governing rate equations and an electron energy balance equation are numerically solved for steady-state and spatially homogeneous cases. The electrical conductivity of a UF4-K/KF gaseous mixture is shown to be a function of neutron flux at representative gas conditions (2500 K and 1 atm). The enhancement is achieved because of the rise in electron temperature due to fission fragment heating.
