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.
Explore membership for yourself or for your organization.
Conference Spotlight
2026 ANS Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
Latest Magazine Issues
May 2026
Jan 2026
2026
Latest Journal Issues
Nuclear Science and Engineering
June 2026
Nuclear Technology
Fusion Science and Technology
Latest News
NRC proposes changes to its rules on nuclear materials
In response to Executive Order 14300, “Ordering the Reform of the Nuclear Regulatory Commission,” the NRC is proposing sweeping changes to its rules governing the use of nuclear materials that are widely used in industry, medicine, and research. The changes would amend NRC regulations for the licensing of nuclear byproduct material, some source material, and some special nuclear material.
As published in the May 18 Federal Register, the NRC is seeking public comment on this proposed rule and draft interim guidance until July 2.
H. H. Windsor, W. J. Tunney, G. A. Price
Nuclear Science and Engineering | Volume 42 | Number 2 | November 1970 | Pages 150-161
Technical Paper | doi.org/10.13182/NSE70-2
Articles are hosted by Taylor and Francis Online.
An extended series of exponential experiments was carried out utilizing 233UO2-ThO2 fuel elements in uniform arrays in light and heavy water. In this series the principal parameters measured were material buckling (), reflector savings (λ), dysprosium disadvantage factor (ζ Dy), ratio of epicadmium to subcadmium capture in thorium (), and ratio of 232Th fission to 233U fission (). A total of 29 clean and poisoned lattices was measured.
