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
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!
Latest Magazine Issues
Apr 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
May 2025
Nuclear Technology
Fusion Science and Technology
Latest News
TerraPower begins U.K. regulatory approval process
Seattle-based TerraPower signaled its interest this week in building its Natrium small modular reactor in the United Kingdom, the company announced.
TerraPower sent a letter to the U.K.’s Department for Energy Security and Net Zero, formally establishing its intention to enter the U.K. generic design assessment (GDA) process. This is TerraPower’s first step in deployment of its Natrium technology—a 345-MW sodium fast reactor coupled with a molten salt energy storage unit—on the international stage.
M. Piera, J.M. Martínez-Val, J.M. Perlado
Fusion Science and Technology | Volume 20 | Number 4 | December 1991 | Pages 964-968
Fusion-Fission Hybrids | doi.org/10.13182/FST91-A11946968
Articles are hosted by Taylor and Francis Online.
The neutronic performance of a hybrid in analysed on the basis of a set of lumped parameters which properly characterize the main features of the hybrid, as energy multiplication or fissile breeding. This analysis enables one to identify the parametric ranges or design windows where a specific hybrid objective can be met. It is shown that fissile fuel production to feed fission reactors requires a set of parameters totally different from that of an energy amplifier hybrid. The latter can be designed to maintain a high factor of energy multiplication for very long burnups. The former reaches the maximum capability to feed fission reactors in the limit of fission-suppressed hybrids, which requires the fertile capture cross section to be as high as possible as compared to the fissile fission cross section. Upper limits of the magnitudes characterizing the neutronic performance are identified.
