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
Education, Training & Workforce Development
The Education, Training & Workforce Development Division provides communication among the academic, industrial, and governmental communities through the exchange of views and information on matters related to education, training and workforce development in nuclear and radiological science, engineering, and technology. Industry leaders, education and training professionals, and interested students work together through Society-sponsored meetings and publications, to enrich their professional development, to educate the general public, and to advance nuclear and radiological science and engineering.
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.
George N. Salaita, Andrew Robeson
Nuclear Science and Engineering | Volume 46 | Number 2 | November 1971 | Pages 214-222
Technical Paper | doi.org/10.13182/NSE71-A22355
Articles are hosted by Taylor and Francis Online.
The diffusion parameters for mixtures of 0, 20, 50, 80, and 100% D2O in H2O have been measured by the pulsed-neutron method at temperatures near the freezing point and in ice at -20°C. A 250-keV Cockcroft-Walton accelerator was used to produce neutron bursts in cylindrical samples by the 2K(d,n)3Re reaction. The waiting time method was used for establishment of the asymptotic spectrum in each sample. The infinite medium decay constants for D2O were evaluated from known density and nuclear cross-section data; those for H2O, H2O ice, and (H2O + D2O) mixtures were determined by a three parameter least-squares fit of the experimental data to the equation λ = λ0 + DoB2 - CB4. An iterative procedure was used to make the value of the extrapolated distance compatible with the diffusion coefficient D0 derived from the least-squares analysis. The results are compared with those of similar measurements by other workers for H2O and D2O at various temperatures. The effect of the liquid-solid phase transition on the diffusion coefficient and diffusion cooling coefficient in H2O and D2O is discussed. The expression D0 = 1 / αi/D0,i, where αi and D0,i are the fractional volume and diffusion coefficient of the i’th component of the mixture, respectively, gave lower values than the experimental results for the mixtures.