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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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Powering the future: How the DOE is fueling nuclear fuel cycle research and development
As global interest in nuclear energy surges, the United States must remain at the forefront of research and development to ensure national energy security, advance nuclear technologies, and promote international cooperation on safety and nonproliferation. A crucial step in achieving this is analyzing how funding and resources are allocated to better understand how to direct future research and development. The Department of Energy has spearheaded this effort by funding hundreds of research projects across the country through the Nuclear Energy University Program (NEUP). This initiative has empowered dozens of universities to collaborate toward a nuclear-friendly future.
Koji Oishi, Yujiro Ikeda, Hiroshi Maekawa, Tomoo Nakamura
Nuclear Science and Engineering | Volume 103 | Number 1 | September 1989 | Pages 46-58
Technical Paper | doi.org/10.13182/NSE89-A23659
Articles are hosted by Taylor and Francis Online.
The neutron spectra in a concrete assembly bombarded by 14-MeV neutrons are measured by a miniature NE-213 spectrometer and the multifoil activation method. The results obtained are within experimental error. The measured spectra are compared with calculated results obtained using the two-dimensional DOT3.5 transport code with 125-group structure cross-section libraries based on ENDF/B—IV, JENDL-2, and JENDL-3T (the test version of JENDL-3). In the deuterium-tritium neutron peak region, the measured and calculated neutron spectra are in agreement. However, all the calculations overestimate the measurements by 10 to 50% in the mega-electron-volt region. In a still lower neutron energy range, where the 197Au(n,γ)198Au reaction is dominant, discrepancies from −30 to +40% are observed. Possible reasons are considered, but none explain the discrepancies. Further investigation of the secondary neutrons in the mega-electron-volt region emitted by elastic and inelastic scattering from the main components of concrete, such as oxygen, silicon, and calcium, is necessary to improve the agreement between experimental and calculated results.
