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
Young Members Group
The Young Members Group works to encourage and enable all young professional members to be actively involved in the efforts and endeavors of the Society at all levels (Professional Divisions, ANS Governance, Local Sections, etc.) as they transition from the role of a student to the role of a professional. It sponsors non-technical workshops and meetings that provide professional development and networking opportunities for young professionals, collaborates with other Divisions and Groups in developing technical and non-technical content for topical and national meetings, encourages its members to participate in the activities of the Groups and Divisions that are closely related to their professional interests as well as in their local sections, introduces young members to the rules and governance structure of the Society, and nominates young professionals for awards and leadership opportunities available to members.
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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Latest News
Three nations, three ways to recycle plastic waste with nuclear technology
Plastic waste pollutes oceans, streams, and bloodstreams. Nations in Asia and the Pacific are working with the International Atomic Energy Agency through the Nuclear Technology for Controlling Plastic Pollution (NUTEC Plastics) initiative to tackle the problem. Launched in 2020, NUTEC Plastics is focused on using nuclear technology to both track the flow of microplastics and improve upstream plastic recycling before discarded plastic can enter the ecosystem. Irradiation could target hard-to-recycle plastics and the development of bio-based plastics, offering sustainable alternatives to conventional plastic products and building a “circular economy” for plastics, according to the IAEA.
Suresh Garg, Feroz Ahmed, L. S. Kothari
Nuclear Science and Engineering | Volume 63 | Number 4 | August 1977 | Pages 500-504
Technical Note | doi.org/10.13182/NSE77-A27064
Articles are hosted by Taylor and Francis Online.
We have extended our earlier calculations of steady-state space- and angle-dependent thermalneutron spectra in small beryllium assemblies to assemblies of much greater transverse dimensions and have studied neutron diffusion up to much greater distances from the source plane, with a view toward looking for a discrete mode of decay. We find that in the forward direction, neutron distribution fails to attain equilibrium inside 140-cm-thick assemblies with transverse dimensions of 150 × 150 cm2, whereas in the backward direction, equilibrium is reached even inside an assembly of transverse dimensions of 80 × 80 cm2. We show that in the forward direction, equilibrium is delayed by the presence of a penetrating beam of uncollided sub-Bragg neutrons of the source. Thus, an experimentalist can hardly hope to observe equilibrium in the forward direction. The calculated value of diffusion length is in excellent agreement with the observed as well as the theoretical values obtained by earlier workers.
