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.
S. K. Bhattacharyya, G. J. Russell, W. K. Foell
Nuclear Science and Engineering | Volume 60 | Number 2 | June 1976 | Pages 147-168
Technical Paper | doi.org/10.13182/NSE76-A26871
Articles are hosted by Taylor and Francis Online.
The Doppler effect for 235U-enriched UO2 fuel pellets has been measured by the Pulsed Activation Doppler (PAD) technique in a TRIGA reactor. A combination of static electrical preheating and pulsed fission heating during irradiation was used to perform the measurements at temperatures extending from 300 K to the melting point of UO2 (3115 K). The 235U enrichment in the experimental samples investigated ranged from 0.22 to 12% by weight. Measurements were made at the highest temperatures ever achieved in Doppler experiments and represent the first activation Doppler measurements under partially molten conditions of UO2. Two sizes of pellets were used in the work, with nominal surface-to-mass ratio values of 0.63 and 1.08 cm2/g, respectively. The experimentally determined values of the Doppler ratio were in good agreement with resonance integral ratios determined from GAROL calculations and extrapolations of the low-temperature Hellstrand correlation. Because the technique involved transient heating, an equivalent static temperature (θeff) was defined for each experimental pellet. Explicit correlations for the Doppler ratio as a function of the parameter were determined from the present data. It is shown that a linear function in the parameter adequately describes the behavior of the data.