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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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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DOE issues new NEPA rule and procedures—and accelerates DOME reactor testing
Meeting a deadline set in President Trump’s May 23 executive order “Reforming Nuclear Reactor Testing at the Department of Energy,” the DOE on June 30 updated information on its National Environmental Policy Act (NEPA) rulemaking and implementation procedures and published on its website an interim final rule that rescinds existing regulations alongside new implementing procedures.
E. Richard Cohen
Nuclear Science and Engineering | Volume 1 | Number 4 | August 1956 | Pages 268-279
Technical Paper | doi.org/10.13182/NSE56-A18602
Articles are hosted by Taylor and Francis Online.
The neutron distribution in the moderator of an infinite square-lattice array is found assuming diffusion theory and a uniform production of neutrons throughout the moderator. Variation of neutron flux density along the sides of a lattice cell is shown to be significant. Nevertheless, the thermal utilization of the lattice can be quite accurately calculated by the use of a “cylindricalized” cell.
