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Division Spotlight
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.
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!
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February 2025
Latest News
Investment bill would provide funding options for energy projects
Coons
Moran
The bipartisan Financing Our Futures Act, which expands certain financing tools to all types of energy resources and infrastructure projects, was reintroduced to the U.S. Senate on February 20 by Sens. Jerry Moran (R., Kan.) and Chris Coons (D., Del.).
Via amendment to the Internal Revenue Code, the legislation would allow advanced nuclear energy projects to form as master limited partnerships (MLPs), a tax structure currently available only to traditional energy projects.
An MLP is a business structure that is taxed as a partnership but the ownership interests of which are traded like corporate stock on a market. Until the Internal Revenue Code is amended, MLPs will continue to be available only to investors in energy portfolios for oil, natural gas, coal extraction, and pipeline projects that derive at least 90 percent of their income from these sources. This change would take effect on January 1, 2026.
Jerzy Kubowski
Nuclear Technology | Volume 47 | Number 1 | January 1980 | Pages 59-69
Technical Paper | Reactor | doi.org/10.13182/NT80-A32412
Articles are hosted by Taylor and Francis Online.
The dynamics model for fast transients analysis in the Polish research reactor Maria has been developed. The model includes, besides the point kinetic equations, the heat transfer and spatially dependent equations for calculating the temperature distribution in the average fuel channel. The space effects in the reactor core were taken into account by flux-weighted temperatures. The code TOTEM, for the CDC-CYBER 73 digital computer, was written in FORTRAN-EXTENDED. Detailed calculations allowed us to obtain the following dynamics parameters for the hot and poisoned reactor core: βeff = 0.00726 and l = 2.65 × 10−4 s. The temperature-dependent reactivity coefficients were used to calculate the feedback effects. To examine the applicability of the model, a series of rod drop experiments was performed, and the comparison of the calculated and measured excess reactivities has shown that the discrepancy does not exceed 2%.
