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
Education, Training & Workforce Development
The Education, Training & Workforce Development Division provides communication among the academic, industrial, and governmental communities through the exchange of views and information on matters related to education, training and workforce development in nuclear and radiological science, engineering, and technology. Industry leaders, education and training professionals, and interested students work together through Society-sponsored meetings and publications, to enrich their professional development, to educate the general public, and to advance nuclear and radiological science and engineering.
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
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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.
L. C. Pwu, T. G. Broughton
Nuclear Technology | Volume 54 | Number 3 | September 1981 | Pages 358-363
First International Retran Meeting | Heat Transfer and Fluid Flow | doi.org/10.13182/NT81-A32780
Articles are hosted by Taylor and Francis Online.
The RETRAN system analysis code has been used to simulate a Three Mile Island Unit 2 overfeeding transient that occurred during a plant startup. Excessive feedwater was fed into the steam generators and resulted in a sudden depressurization of the reactor coolant system (RCS). The reactor tripped on low RCS pressure and safety injection was initiated. The RETRAN simulation of this event shows the same trends and predicts the same sequence of events as the plant data and thus develops a reliable understanding of the relationship between the primary RCS and the secondary feed and steam systems. The model developed is useful in studying the margin to protective system limits during disturbances at low power.
