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Division Spotlight
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
Meeting Spotlight
2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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
Nuclear supply chain innovation and collaboration: Keeping the nuclear supply chain viable through change
The next nuclear renaissance may be upon us, but with it comes a perfect storm. The industry is unprepared for a surge in demand for goods and services from both the existing light water fleet and the next generation of reactors. We are currently teetering on the edge of severe supply chain issues, but if the nuclear industry can understand the sources of our challenges, we can mitigate them.
Masahiro Tatsumi, Tomoko Ito, Toshikazu Takeda, Masatoshi Yamasaki, Akio Yamamoto, Masaharu Takayasu
Nuclear Science and Engineering | Volume 125 | Number 2 | February 1997 | Pages 178-187
Technical Paper | doi.org/10.13182/NSE97-A24264
Articles are hosted by Taylor and Francis Online.
To provide accurate effective cross sections for core calculations, the multiband method was applied to light water reactor assembly calculations. The multiband method has been extended to arbitrary geometries by introducing band-dependent currents at the boundaries of a region. The transport of neutron is treated by the angular space-dependent current coupling collision probability method. A fuel assembly is divided into heterogeneous domains where the multiband method is applied directly by using collision probabilities. Several examples of numerical calculations for UO2 and mixed oxide fuel assemblies are shown. The space dependence of the effective cross section can be expressed accurately by this method, which leads to an accurate prediction of k∞ values.