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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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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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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Latest News
NRC engineers share their expertise at the University of Puerto Rico
Robert Roche-Rivera and Marcos Rolón-Acevedo are licensed professional engineers who work at the U.S. Nuclear Regulatory Commission. They are also alumni of the University of Puerto Rico–Mayagüez (UPRM) and have been sharing their knowledge and experience with students at their alma mater since last year, serving as adjunct professors in the university’s Department of Mechanical Engineering. During the 2023–2024 school year, they each taught two courses: Fundamentals of Nuclear Science and Engineering, and Nuclear Power Plant Engineering.
Peter H. Titus, Charles Kessel
Fusion Science and Technology | Volume 77 | Number 7 | November 2021 | Pages 557-567
Technical Paper | doi.org/10.1080/15361055.2021.1898303
Articles are hosted by Taylor and Francis Online.
New superconductor types and performance levels are being developed and have enabled consideration of higher-field, smaller-size devices. In this paper, sizing options for the next Fusion Energy System Study (FESS) design study are explored. The 2016/2017 baseline Fusion Nuclear Science Facility (FNSF) used a bucked and wedged solution with a large external case mainly to support out-of-plane loads and allow radial servicing. Use of a larger case to provide inner leg compression may be needed for the higher-field, smaller devices. These structural concepts have been employed in FIRE, IGNITOR, and C-Mod. Each of these concepts will be investigated as candidates for a next machine study. Recommendations will be made as to how these concepts can be incorporated into systems codes.
The iterative design of the poloidal field coil system and the iterative choice of scenario currents are needed to go along with toroidal field (TF) coil support concepts. Concepts that employ a bucked solution require assessment of cancellation of the central solenoid radially outward and the TF radially inward load, and thus affect the sizing of both. Ideally better but simple structural models of the poloidal coils can be built into the scenario development codes to address advanced TF support schemes. Simplified spreadsheet assessments of structural concepts are presented, and these are benchmarked against finite element analyses. Possible options for the FNSF and next machine studies are assessed in terms of achievable fields and space allocation.