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.
Division Spotlight
Mathematics & Computation
Division members promote the advancement of mathematical and computational methods for solving problems arising in all disciplines encompassed by the Society. They place particular emphasis on numerical techniques for efficient computer applications to aid in the dissemination, integration, and proper use of computer codes, including preparation of computational benchmark and development of standards for computing practices, and to encourage the development on new computer codes and broaden their use.
Meeting Spotlight
2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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!
Latest Magazine Issues
Aug 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
October 2024
Nuclear Technology
Fusion Science and Technology
August 2024
Latest News
New laws offer nuclear industry incentives for existing power plant uprates
This year, the U.S. nuclear industry received a much-needed economic boost that could help preserve operating nuclear power plants and incentivize upgrades that extend their lifespan and power output.
Signed into law in 2022, the Inflation Reduction Act offers production tax credits (PTCs) for existing nuclear power plants and either PTCs or investment tax credits (ITCs) for new carbon-free generation. These credits could make power uprates—increasing the maximum power level at which a commercial plant may operate—a much more appealing option for utilities.
Yigal S. Gur, Yair Bartal, Shimon Yiftah
Nuclear Science and Engineering | Volume 89 | Number 3 | March 1985 | Pages 217-232
Technical Paper | doi.org/10.13182/NSE85-A17543
Articles are hosted by Taylor and Francis Online.
Two-dimensional diffusion calculations, as commonly used, are unreliable for excess reactivity computations of small nuclear systems with significant leakage in the untreated dimension. Observing that the errors are mainly systematic, similarity between nuclear systems is defined and a theory concerning effective buckling is developed that eliminates systematic errors. Excess core reactivities of the materials-test-reactor-type swimming-pool research reactor IRR-1 are then computed with an accuracy better than ±0.5% with 99% confidence, and, in fact, the differences between the computed and measured values are <0.15% for the cases computed.