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Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
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2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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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
G7 pledges support for nuclear at Italy meeting
The Group of Seven (G7) recommitted its support for nuclear energy in the countries that opt to use it at a Ministerial Meeting on Climate in Italy last month.
In a statement following the April meeting, the group committed to support multilateral efforts to strengthen the resilience of nuclear supply chains, referencing the goal set by 25 countries during last year’s COP28 climate conference in Dubai to triple global nuclear generating capacity by 2050.
Shiyi He, Yan Xia, Fei Xu, Leidang Zhou, Xiaoping Ouyang
Nuclear Science and Engineering | Volume 195 | Number 2 | February 2021 | Pages 148-160
Technical Paper | doi.org/10.1080/00295639.2020.1794454
Articles are hosted by Taylor and Francis Online.
Alpha-decay propulsion technology, a microthrust technology based on thin spontaneous-alpha-decay films, is proposed in this paper. A large quantity of decayed alpha particles emitted from the upper surface of thin films would generate thrust statistically. Simulations were executed using the Monte Carlo N-Particle Transport Code (MCNP) to acquire the energy and angular distributions of escaping alpha particles, as well as the key parameters of alpha-decay films. A 22.40-μm 210Po film combined with a 20-μm aluminum film was able to generate an average thrust of 29.5 nN/cm2 in half-life time. The remaining charges and thermal energies of the decay films were considered. Directional-generated alpha particles were simulated to analyze the influence of angular scattering on escaped alpha-particle distributions. Alpha particles with low energy, with large scattering angles, or with large generated angles contributed less to thrust value. With the assumptions of no scattering, constant stopping power, and no range struggling, a set of analytic formulas were derived. Comparisons of the distributions and typical parameters between simulations and the analytic model were conducted. Discrepancies were mostly caused by the three assumptions and were less than 3.7% for thrust and less than 3.9% for the proportion of escaped alpha-particles.