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Conference Spotlight
2026 ANS Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
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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
CFS working with NVIDIA, Siemens on SPARC digital twin
Commonwealth Fusion Systems, a fusion firm headquartered in Devens, Mass., is collaborating with California-based computing infrastructure company NVIDIA and Germany-based technology conglomerate Siemens to develop a digital twin of its SPARC fusion machine. The cooperative work among the companies will focus on applying artificial intelligence and data- and project-management tools as the SPARC digital twin is developed.
R. S. CASWELL, R. F. GABBARD, D. W. PADGETT, W. P. DOERING
Nuclear Science and Engineering | Volume 2 | Number 2 | April 1957 | Pages 143-159
Technical Paper | doi.org/10.13182/NSE57-A25383
Articles are hosted by Taylor and Francis Online.
The attenuation of 14.1-Mev neutrons in water has been studied under conditions simulating an isotropic point source of monoenergetic neutrons in an infinite water medium. The migration area of thermal neutrons (⟨r2⟩th/6) was found to be 156 ± 6 cm2. The “age” of indium resonance neutrons was measured to be 150 ± 6 cm2. Fast neutron dose measurements are in agreement with the theoretical calculations of Goldstein et al.
