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Decommissioning & Environmental Sciences
The mission of the Decommissioning and Environmental Sciences (DES) Division is to promote the development and use of those skills and technologies associated with the use of nuclear energy and the optimal management and stewardship of the environment, sustainable development, decommissioning, remediation, reutilization, and long-term surveillance and maintenance of nuclear-related installations, and sites. The target audience for this effort is the membership of the Division, the Society, and the public at large.
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2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott Downtown
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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High-temperature plumbing and advanced reactors
The use of nuclear fission power and its role in impacting climate change is hotly debated. Fission advocates argue that short-term solutions would involve the rapid deployment of Gen III+ nuclear reactors, like Vogtle-3 and -4, while long-term climate change impact would rely on the creation and implementation of Gen IV reactors, “inherently safe” reactors that use passive laws of physics and chemistry rather than active controls such as valves and pumps to operate safely. While Gen IV reactors vary in many ways, one thing unites nearly all of them: the use of exotic, high-temperature coolants. These fluids, like molten salts and liquid metals, can enable reactor engineers to design much safer nuclear reactors—ultimately because the boiling point of each fluid is extremely high. Fluids that remain liquid over large temperature ranges can provide good heat transfer through many demanding conditions, all with minimal pressurization. Although the most apparent use for these fluids is advanced fission power, they have the potential to be applied to other power generation sources such as fusion, thermal storage, solar, or high-temperature process heat.1–3
Peter Yarsky, Kevin Coyne, Cynthia Taylor, Chad Oelstrom
Nuclear Technology | Volume 211 | Number 2 | February 2025 | Pages 358-376
Research Article | doi.org/10.1080/00295450.2024.2326375
Articles are hosted by Taylor and Francis Online.
Risk plus Some Attributes (R + SA) is a method that risk informs the prioritization of inspection activities related to new fuel cycle facility construction. The method uses information available in the Integrated Safety Analysis (ISA) summary to compute the risk-informed importance score of each item relied on for safety (IROFS) referenced in the ISA summary. The approach is based on approximating the risk for each accident sequence and then apportioning that risk to IROFSs associated with that sequence. Once the IROFS risk-informed importance score is computed, the importance score can be adjusted to account for other factors besides the risk. These other factors capture attributes of the IROFSs that affect the prioritization they should receive for inspection. An example of an attribute is the complexity of the IROFSs; complex as opposed to simple IROFSs warrant a higher inspection priority. This paper provides a description of the theoretical and mathematical framework of the R + SA methodology.
