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Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
Meeting Spotlight
2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott 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!
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Latest News
Contractor selected for Belgian LLW/ILW facility
Brussels-based construction group Besix announced that is has been chosen by the Belgian agency for radioactive waste management ONDRAF/NIRAS for construction of the country’s surface disposal facility for low- and intermediate-level short-lived nuclear waste in Dessel.
John Mac Phee
Nuclear Science and Engineering | Volume 4 | Number 2 | August 1958 | Pages 200-208
doi.org/10.13182/NSE58-A15362
Articles are hosted by Taylor and Francis Online.
The stability of a multipass reactor having series coolant flow through the passes was considered. The investigation was predicated on the assumption that the effects of the temperature coefficient of reactivity of each pass can be superimposed. An analytical model was derived based on constant coolant flow and constant core inlet temperature. By making certain simplifying assumptions, a criteria was established which predicts the stability of the system as a function of the temperature coefficients of reactivity. It has been shown that a negative temperature coefficient in each pass is neither a necessary nor a sufficient condition for stable operation.
