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
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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
Senate committee hears from energy secretary nominee Chris Wright
Wright
Chris Wright, president-elect Trump’s pick to lead the U.S. Department of Energy, spent hours today fielding questions from members of the U.S. Senate’s committee on Energy and Natural Resources.
During the hearing, Wright—who’s spent most of his career in fossil fuels—made comments in support of nuclear energy and efforts to expand domestic generation in the near future. Asked what actions he would take as energy secretary to improve the development and deployment of SMRs, Wright said: “It’s a big challenge, and I’m new to government, so I can’t list off the five levers I can pull. But (I’ve been in discussions) about how to make it easier to research, to invest, to build things. The DOE has land at some of its facilities that can be helpful in this regard.”
P. S. W. Chan, A. R. Dastur
Nuclear Science and Engineering | Volume 103 | Number 3 | November 1989 | Pages 283-288
Technical Paper | doi.org/10.13182/NSE89-A23679
Articles are hosted by Taylor and Francis Online.
The components of the void reactivity effect in the RBMK lattice are obtained using multigroup multidimensional lattice codes. The relative magnitudes of the reactivity change due to changes, on voiding, in neutron absorption and in neutron moderation are compared for several lattice configurations that include either absorber rods or followers of various materials. This has led to the identification of the mechanism that makes the void coefficient dependent on the number of absorber rods in the core. In line with these results, it is shown that replacing the graphite in the follower with nonmoderating materials reduces the void coefficient dependence on the number of absorber rods and is an economic method that may have potential in the void coefficient reduction program.
