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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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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Latest News
NNSA furloughs 1,400 employees, pays contractors until end of month
After nearly three weeks of a government shutdown, the Department of Energy’s National Nuclear Security Administration has furloughed 1,400 employees and has retained 400 as essential employees who will continue working without pay.
Amalia Chambon, Luca Zanini
Nuclear Science and Engineering | Volume 198 | Number 2 | February 2024 | Pages 411-422
Research Article | doi.org/10.1080/00295639.2023.2194202
Articles are hosted by Taylor and Francis Online.
The European Spallation Source (ESS) is currently under construction in Lund, Sweden. At the time of the first beam-on-target, foreseen in 2025, a first set of neutron scattering instruments will be commissioned, in addition to a test beamline for characterization of the source. For every planned beamline, all optics components will already have been installed in the monolith shielding surrounding the spallation target, but instruments will still be under construction in the neutron bunker area. Blocks of shielding, referred to as temporary beam stops or wall plugs, are then required to capture neutrons that will come out through the bunker wall feedthroughs during operation. This paper presents the results of parametric studies carried out to design temporary beam stops to assess the possibilities of reducing the weight and cost of such components and also to investigate the shielding efficiency of a wall plug as an alternative solution.