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
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
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. R. Hatcher, H. K. Rae
Nuclear Science and Engineering | Volume 10 | Number 4 | August 1961 | Pages 316-330
doi.org/10.13182/NSE61-A15373
Articles are hosted by Taylor and Francis Online.
The formation of a colloidal suspension of hydrated aluminum oxide, Gibbsite or α-Al2O3 · 3D2O, in the heavy water of the NRU reactor is described, and compared with turbidity formation in other aluminum-water reactor systems. The observed corrosion rate of aluminum in NRU is consistent with a mass transfer mechanism involving the continuous dissolution of the corrosion product film. Two primary mechanisms for removing the dissolved aluminum from solution are postulated. These are direct crystallization onto deposits in the heat exchangers and direct crystallization onto Gibbsite particles in the water. The former effectively removes alumina from the system while the latter produces turbidity in the water. The rate of appearance of turbidity depends on its rate of formation and its rate of removal by the purification system. Turbidity is removed by filtration and adsorption in the ion-exchange columns and by evaporation. It is desirable to reduce the rate of formation of turbidity by choosing water conditions which minimize the solubility of the corrosion product film, rather than controlling the turbidity level by an adequate purification capacity.