日本電子力研究所 Fusion Neutronics Source(FNS)におけるD-T中性子スカイシャイン実験  [in Japanese] D-T Neutron Skyshine Experiments at JAERI/FNS  [in Japanese]

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Author(s)

Abstract

The D-T neutron skyshine experiments have been carried out at the Fusion Neutronics Source (FNS) of JAERI with the neutron yield of ∼1.7×10<SUP>11</SUP>n/s. The concrete thickness of the roof and the wall of a FNS target room are 1.15 and 2 m, respectively. The FNS skyshine port with a size of 0.9 × 0.9 m<SUP>2</SUP> was open during the experimental period.The radiation dose rate outside the target room was measured as far as about 550 m away from the D-T target point with a spherical rem-counter. The highest neutron dose was about 0.5 μSv/hr at a distance of 30 m from the D-T target point and the dose rate was attenuated to 0.002 μSv/hr at a distance of 550 m. The measured neutron dose distribution was analyzed with Monte Carlo code MCNP-4B and a simple line source model. The MCNP calculation overestimates the neutron dose in the distance range larger than 250 m. The neutron spectra were evaluated with a <SUP>3</SUP>He detector with different thickness of polyethylene neutron moderators. Secondary gamma-rays were measured with high purity Ge detectors and NaI scintillation detectors.

Journal

  • Journal of Plasma and Fusion Research

    Journal of Plasma and Fusion Research 79(3), 282-289, 2003-03-25

    The Japan Society of Plasma Science and Nuclear Fusion Research

References:  14

Codes

  • NII Article ID (NAID)
    110003825346
  • NII NACSIS-CAT ID (NCID)
    AN10401672
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    09187928
  • NDL Article ID
    6519772
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z15-8
  • Data Source
    CJP  NDL  NII-ELS  J-STAGE  NDL-Digital 
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