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Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott Downtown
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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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Smarter waste strategies: Helping deliver on the promise of advanced nuclear
At COP28, held in Dubai in 2023, a clear consensus emerged: Nuclear energy must be a cornerstone of the global clean energy transition. With electricity demand projected to soar as we decarbonize not just power but also industry, transport, and heat, the case for new nuclear is compelling. More than 20 countries committed to tripling global nuclear capacity by 2050. In the United States alone, the Department of Energy forecasts that the country’s current nuclear capacity could more than triple, adding 200 GW of new nuclear to the existing 95 GW by mid-century.
C. B. Ashmore, D. Brown, S. Dickinson, H. E. Sims
Nuclear Technology | Volume 129 | Number 3 | March 2000 | Pages 387-397
Technical Paper | Reactor Operations and Control | doi.org/10.13182/NT00-A3069
Articles are hosted by Taylor and Francis Online.
Radiolytic oxidation is considered to be the main mechanism for the formation of I2 from aqueous CsI in the containment of a water-cooled reactor after a loss-of-coolant accident (LOCA) in a pressurized water reactor. Despite the amount of study over the last 60 yr on the radiation chemistry of iodine, there have, until recently, been few consistent sets of experiments spanning a wide enough range of conditions to allow models to be verified with confidence.The results from a set of experiments carried out to remedy this deficiency are described. In this work the rate of evolution of I2 from sparged irradiated borate solutions containing CsI labeled with 131I was measured on-line over a range of conditions. This work involved the measurement of the effects of pH, temperature, O2 concentration, I- concentration, phosphate concentration, dose-rate, and impurities on the rate of evolution of I2. The range of conditions was chosen to span as closely as possible the range of conditions expected in a LOCA, but also to help to elucidate some of the mechanisms especially at high pH.The pH was found to be a very important factor in determining iodine volatility. Over the temperature range studied, the extent of oxidation decreased with increasing temperature, but this was counteracted, to a greater or lesser extent, by the decrease in partition coefficient. The oxygen concentration was more important in solutions not containing phosphate. The fractional oxidation was not particularly dependent on iodide concentration, but GI2 was very dependent on [I-]. There was no effect of added impurities, Fe, Mn, Mo, or organics although, in separate work, silver was found to have a very important effect.During attempts to interpret the data, it was found that it was necessary to consider the iodine atom as a volatile species with a partition coefficient of 1.9 taken from thermodynamic data. The modeling work is described in a separate paper.
