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.
J. J. Ullo and M. Goldsmith
Nuclear Science and Engineering | Volume 60 | Number 3 | July 1976 | Pages 239-250
Technical Paper | doi.org/10.13182/NSE76-A26881
Articles are hosted by Taylor and Francis Online.
Monte Carlo analysis of the measurements of Smith et al. of the number of fission neutrons produced per neutron absorbed, η, for 2200 m/sec neutrons absorbed by 233U and 235U yields: = 2.2993 ± 0.0082 and = 2.0777 ± 0.0064. The standard deviations include Monte Carlo, cross-section, and experimental uncertainties. The Monte Carlo analysis was confirmed by calculating measured quantities used by the experimentalists in determining η2200.