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
Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
Meeting Spotlight
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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 Science and Engineering
March 2025
Nuclear Technology
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February 2025
Latest News
RP3C Community of Practice’s fifth anniversary
In February, the Community of Practice (CoP) webinar series, hosted by the American Nuclear Society Standards Board’s Risk-informed, Performance-based Principles and Policies Committee (RP3C), celebrated its fifth anniversary. Like so many online events, these CoPs brought people together at a time when interacting with others became challenging in early 2020. Since the kickoff CoP, which highlighted the impact that systems engineering has on the design of NuScale’s small modular reactor, the last Friday of most months has featured a new speaker leading a discussion on the use of risk-informed, performance-based (RIPB) thinking in the nuclear industry. Providing a venue to convene for people within ANS and those who found their way online by another route, CoPs are an opportunity for the community to receive answers to their burning questions about the subject at hand. With 50–100 active online participants most months, the conversation is always lively, and knowledge flows freely.
A. G. Solomah
Nuclear Technology | Volume 62 | Number 3 | September 1983 | Pages 311-316
Technical Paper | Material | doi.org/10.13182/NT83-A33254
Articles are hosted by Taylor and Francis Online.
Different leaching tests (MCC-1 and MCC-2) have been conducted on a monolithic sintered modified SYNROC-B ceramic waste form containing 10 wt% simulated high-level radioactive waste in triple distilled H2O. The temperature range was 25 to 150°C. Increases in the leach rates of cesium and barium have been observed as the leaching temperature increases indicating that the leach rate should follow the empirical Arrhenius law:LRi(t) =Ki exp (-Qai/ Rt) ,where LRi(t), Ki, and Qai are the leach rate, the experimental constant, and the activation energy of the element of interest, i. The activation energies for cesium and barium are 6.62 and 3.2 kcal.mol-1, respectively. The behavior of the pH of the leachant was monitored as a function of leaching time and temperature. Increases in the fluorine ion concentration (F-) in the leachant were found to be temperature-and time-dependent functions indicating the leaching of the Teflon containers recommended by the Materials Characterization Center. These Teflon containers should be preleached before their use in leaching experiments, or other leach-resistant containers should be used.
