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
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
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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
NRC cuts fees by 50 percent for advanced reactor applicants
The Nuclear Regulatory Commission has announced it has amended regulations for the licensing, inspection, special projects, and annual fees it will charge applicants and licensees for fiscal year 2025.
Ajoy K. Ghatak, Theodore J. Krieger
Nuclear Science and Engineering | Volume 21 | Number 3 | March 1965 | Pages 304-311
Technical Paper | doi.org/10.13182/NSE65-A20033
Articles are hosted by Taylor and Francis Online.
The thermalization of a pulse of fast neutrons in a large, homogeneous water assembly is investigated numerically. The effect of chemical binding is studied by comparing the results obtained with the free-hydrogen gas and the Nelkin kernels. It is found that chemical binding has an observable effect on some of the quantities of interest in a pulsed-neutron experiment. Two definitions of mean slowing-down time are considered and their relationship examined. Comparisons are made to several experimental measurements and earlier calculations.
