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Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
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2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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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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From remediation to production: The DOE’s Cleanup to Clean Energy initiative
On July 28, 2023, the Department of Energy launched its Cleanup to Clean Energy initiative, an effort to repurpose underutilized DOE-owned property—portions of which were previously used in the nation’s nuclear weapons program—into the sites of clean-energy generation.
Noriaki Nakao, Shun-ichi Tanaka, Takashi Nakamura, Kazuo Shin, Susumu Tanaka, Hiroshi Takada, Shinichiro Meigo, Yoshihiro Nakane, Yukio Sakamoto, Mamoru Baba
Nuclear Science and Engineering | Volume 124 | Number 2 | October 1996 | Pages 243-257
Technical Paper | doi.org/10.13182/NSE96-A28575
Articles are hosted by Taylor and Francis Online.
Neutron spectra in the energy range above 10-4 eV transmitted through iron shields succeedingly are measured with a BC501A liquid scintillation detector and the Bonner Ball detector using quasi-monoenergetic neutron sources generated via the 7Li(p,n) reaction by 43- and 68-MeV protons. Using the collimated source neutrons, the spectra are obtained on the neutron beam axis and at off-center positions. The calculations using the MORSE-CG and DOT3.5 codes with the DLC119 group cross-section data sets as well as the HETC-KFA2 code are carried out and compared with the measurements. The spectra calculated with the Monte Carlo code MORSE-CG and the DLC119 data agree with the measurements on the whole in the energy region above a few mega-electron-volts. It, however, is found that a few orders of Legendre expansion fail to reproduce the measurements at the position dominated by the neutrons scattered at a large angle. The calculations with the two-dimensional discrete ordinates code DOT3.5 and the DLC119 data also agree with the measurements in the overall energy region, though the restricted numbers of angular quadrature and a few orders of Legendre expansion led to the disagreement with the measurements at the off-center positions or in the neutron peak energy region. The comparison among the calculations with the Monte Carlo code HETC-KFA2 and the measurements show that the contribution of elastic scattering is very important in the intermediate energy region, and the treatment of the angular distribution of the elastic scattering reaction in the HETC-KFA2 code should be modified.