ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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Division Spotlight
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
Meeting Spotlight
2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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
October 2024
Nuclear Technology
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Latest News
Senate to consider Matthew Marzano’s NRC nomination this week
The U.S. Senate’s Committee on Environment and Public Works will consider the nomination of Matthew Marzano to the Nuclear Regulatory Commission during a hearing on Wednesday, September 11.
In July, President Joe Biden named Marzano as his choice to fill the open seat on the five-member commission. The NRC, the nation’s independent regulator of civilian nuclear safety, has been without a tie-breaker for party-line votes among the four current members since commissioner Jeff Baran’s term ended in June 2023.
The NRC has been in the spotlight in recent years as the United States experiences a resurgence in demand for and technology advances in nuclear power. The commission is facing a high volume of license requests and is working to modernize and streamline its review process.
Jiyun Zhao, C. P. Tso, K. J. Tseng
Nuclear Technology | Volume 180 | Number 1 | October 2012 | Pages 78-88
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT12-A14520
Articles are hosted by Taylor and Francis Online.
The effects of two-phase-flow modeling on nuclear reactor single-channel stability analysis are investigated with four two-phase-flow models, namely, the homogeneous-equilibrium model, the homogeneous-nonequilibrium model, the nonhomogeneous-equilibrium model, and the nonhomogeneous-nonequilibrium model. The models are applied to hot-channel analyses of a proposed typical supercritical-water-cooled-reactor (SCWR) design. The neutral stability boundaries derived by using the four models are compared and plotted on the traditional subcooling number versus phase change number plane. To ensure proper development of the models, they are benchmarked to the experimental data. It is found that the homogeneous models predict more conservative stability boundaries than the nonhomogeneous models and that the differences of the stability boundaries predicted by all four two-phase-flow models are reduced under higher-pressure conditions.