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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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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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Fusion Science and Technology
Latest News
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
M. Goto, S. Morita, H. Y. Zhou, C. F. Dong, LHD Experiment Group
Fusion Science and Technology | Volume 58 | Number 1 | July-August 2010 | Pages 394-411
Chapter 8. Diagnostics | Special Issue on Large Helical Device (LHD) | doi.org/10.13182/FST10-A10825
Articles are hosted by Taylor and Francis Online.
Various types of spectrometers corresponding to different wavelength ranges from X-ray to visible have been developed for the Large Helical Device (LHD). The charge-coupled device is demonstrated to be a suitable solution as a detector for spectral measurements irrespective of the wavelength range. In the ultraviolet (UV)-visible range, an astigmatism-corrected 1.3-m Czerny-Turner-type spectrometer is developed for a simultaneous measurement with 80 lines of sight. Two other UV-visible spectrometers having focal lengths of 0.3 and 0.5 m, respectively, are also prepared for wide wavelength range measurements. An in situ sensitivity calibration is attempted for these spectrometers, for which visible bremsstrahlung from the LHD plasma is utilized. In the vacuum ultraviolet range (30 to 310 nm), a normal incidence spectrometer having a focal length of 3 m is developed for a spatial intensity profile measurement of impurity ions, especially in the plasma boundary region, and for measurements of line broadening of several impurity ions. A number of forbidden emission lines due to magnetic dipole transitions are also identified with this spectrometer. In the extreme ultraviolet range (1 to 50 nm), flat-field spectrometers are developed for measurements of emission lines from high-Z impurities in the plasma core. Two types of gratings, i.e., mechanically ruled and laminar-type holographic, have been tested, and the latter is found to be preferable with respect to the reflectivity and the resolution power. A Johann-type X-ray crystal spectrometer is developed for measurements of the central ion temperature, for which the resonance line of Ar XVII ion (1s2 1S0 - 1s2p 1P1) is mainly used. The central ion temperature is routinely measured with high time resolution.
