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
Nuclear Installations Safety
Devoted specifically to the safety of nuclear installations and the health and safety of the public, this division seeks a better understanding of the role of safety in the design, construction and operation of nuclear installation facilities. The division also promotes engineering and scientific technology advancement associated with the safety of such facilities.
Meeting Spotlight
Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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
February 2025
Nuclear Technology
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Latest News
IEA report: Challenges need to be resolved to support global nuclear energy growth
The International Energy Agency published a new report this month outlining how continued innovation, government support, and new business models can unleash nuclear power expansion worldwide.
The Path to a New Era for Nuclear Energy report “reviews the status of nuclear energy around the world and explores risks related to policies, construction, and financing.”
Find the full report at IEA.org.
L. Hjärne, M. Leimdörfer
Nuclear Science and Engineering | Volume 24 | Number 2 | February 1966 | Pages 165-174
Technical Paper | doi.org/10.13182/NSE66-A18301
Articles are hosted by Taylor and Francis Online.
A new approach is presented in the formulation of removal-diffusion theory. The removal cross section is redefined and the slowing down between the multigroup diffusion equations is treated with a complete energy-transfer matrix rather than in an age theory approximation. The method, based on the new approach, contains an adjustable parameter. Examples of neutron spectra and thermal flux penetrations are given in a number of differing shield configurations, and the results compare favorably with experiments and Moments-Method calculations.
