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
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
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.
Gene A. Baraff, Raymond L. Murray, A. C. Menius, Jr.
Nuclear Science and Engineering | Volume 4 | Number 5 | November 1958 | Pages 623-634
Technical Paper | doi.org/10.13182/NSE58-A25552
Articles are hosted by Taylor and Francis Online.
Two group perturbation theory of thermal reactors is reviewed and tables of fluxes, adjoint fluxes, arbitrary coefficients, and computation constants are given. A general reactivity formula in matrix notation is derived, and integrals needed in the evaluation of perturbations in the core and reflector are tabulated. The special problem of a reflector void of constant cross-sectional area is also considered.
