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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.
Patrick F. O’Rourke, Anil K. Prinja
Nuclear Science and Engineering | Volume 197 | Number 3 | March 2023 | Pages 463-471
Technical Note | doi.org/10.1080/00295639.2022.2106728
Articles are hosted by Taylor and Francis Online.
We explore two methods for determining the probability that a neutron, upon leaking, will transfer from one spherical assembly to another, namely, the view factor method (VFM) and the sphere point picking method (SPPM). The VFM is an approximate analytical method that assumes the neutron is leaking from a point source, and therefore, has applicability limitations. The SPPM is a purely Monte Carlo method that samples a location on the surface of a sphere as well as a trajectory leading away from said system to then determine if the neutron streams into another assembly. Numerical results from the two methods are contrasted, and the relative merits of each method discussed.