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
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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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Nuclear Science and Engineering
March 2025
Nuclear Technology
Fusion Science and Technology
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.
Joseph A. Naser
Nuclear Technology | Volume 54 | Number 3 | September 1981 | Pages 373-379
First International Retran Meeting | Heat Transfer and Fluid Flow | doi.org/10.13182/NT81-A32782
Articles are hosted by Taylor and Francis Online.
The RETRAN system thermal-hydraulics analysis code has been used to simulate the three turbine trip tests at the Peach Bottom Unit 2 boiling water reactor. The latest analysis used the dynamic slip, profile fit subcooled void, and point kinetics models in RETRAN-02. The results demonstrated that RETRAN is capable of simulating operational transients such as turbine trips. The analysis aided in understanding physical phenomena not well known such as the transient behavior of the steam bypass system and the pressure vessel. Experience gained in this work pointed out the importance of having good experimental data for code qualification purposes. This includes knowing the initial conditions, boundary conditions, control system and equipment parameters, and operator actions. The analysis of these three tests will be repeated in the future using one-dimensional kinetics, improved steam separator, and mechanistic subcooled voiding models.
