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Division Spotlight
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
Meeting Spotlight
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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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Nuclear Technology
Fusion Science and Technology
Latest News
Zap Energy hits 37-million-degree electron temperatures in compact fusion device
Zap Energy announced April 23 that it has reached 1-3 keV plasma electron temperatures—roughly the equivalent of 11 to 37 million degrees Celsius—using its sheared-flow-stabilized Z-pinch approach to fusion. Reaching temperatures above that of the sun’s core (which is 10 million degrees Celsius temperature) is just one hurdle required before any fusion confinement concept can realistically pursue net gain and fusion energy.
A. S. Choi, R. A. Pierce, T. B. Edwards, T. B. Calloway
Nuclear Technology | Volume 160 | Number 3 | December 2007 | Pages 361-373
Technical Note | Radioisotopes | doi.org/10.13182/NT07-A3907
Articles are hosted by Taylor and Francis Online.
Both experimental and process simulation studies were performed to develop physical property models of the concentrated cesium ion-exchange eluate solutions in one of the Hanford Waste Treatment Plant evaporators. The physical properties of interest included the bulk solubility, density, viscosity, and heat capacity of the evaporator bottoms, and the proposed model of each response was a linear mixture model containing 12 coefficients. A unique feature of this work is that the values of these coefficients were determined by the regression of the "virtual" experimental data, which were not measured but were calculated using a computer process model that simulated the semibatch evaporation of cesium eluate solutions. To improve the accuracy of calculated virtual experimental data and the resulting physical property models, a series of benchscale evaporation tests was also conducted to provide the necessary experimental data for the development of a multielectrolyte thermodynamic database on which the computer process model was built. Specifically, the solubility and other physical properties of selected binary, ternary, and higher-order systems were measured to support the optimization of a sexenary database for the Na-K-Cs-Al-HNO3-H2O system. As the input to the virtual experimental runs, a matrix of cesium eluate simulants was designed within the bounding concentrations of the major analytes identified in radioactive samples. The computer process model was then run in conjunction with the sexenary thermodynamic database to calculate the physical properties of each matrix solution concentrated to the target end points of 80 and 100% saturation. The calculated physical properties were analyzed statistically and fitted into the 12-coefficient mixture function of temperature and the concentrations of major analytes in the unevaporated eluate. Over the concentration and temperature ranges considered, the resulting empirical physical property models were found to correlate the computer-generated data well without significant bias.