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
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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
August 2024
Nuclear Technology
Fusion Science and Technology
Latest News
Constellation seeks rezone for property adjacent to Illinois plant
While no development details have been released, Constellation is asking to rezone 658.8 acres of land it owns around the Byron nuclear plant in Illinois for possible long-term use.
Luis E. Herranz, Claudia López (CIEMAT)
Proceedings | 2018 International Congress on Advances in Nuclear Power Plants (ICAPP 2018) | Charlotte, NC, April 8-11, 2018 | Pages 318-324
Worldwide there has been an enormous interest to fully understand the Fukushima accident unfolding, as a way to gain key insights for prevention of these accidents and mitigation of their consequences. This paper focuses on the CIEMAT’s forensic analysis of the Fukushima Unit 1 (1F1) accident sequence. By identifying the major challenges faced for a consistent interpretation of the data available, a description of the MELCOR 2.2 model built to capture the main accident signatures is presented, with particular emphasis on fission product release and transport. Even though this study should be seen as a work in progress, the results here presented are based on a defendable set of hypotheses and approximations and highlight some interesting observations that might have affected fission product release and transport. Among them are worth mentioning the deposit remobilization during the transient (Cesium), the moderate retention in the suppression pool due to the WW bypass meant by direct leaks between RPV and DW and the potential reentrainment as a result of pool saturation. This being said, it’ll be hard to confirm any of these insights concerning fission products. This work is framed under the BSAF Phase 2 project of the OECD and it has been supported by the Spanish Nuclear Regulatory Body through the CSN-CIEMAT collaboration agreement on Severe Accidents (ACAS).