High Power Laser and Particle Beams, Volume. 32, Issue 5, 056001(2020)

Monte Carlo simulation research on reference neutron radiation of 241Am-Be radionuclide

Song Zhang1...2, Biao Wei1, Yixin Liu2,3, Benjiang Mao2, Yikun Qian1,2, Yuchen Huang1,2 and Peng Feng1,* |Show fewer author(s)
Author Affiliations
  • 1Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, Chongqing University, Chongqing 400044, China
  • 2Institute of Nuclear Physics and Chemistry, CAEP, Mianyang 621900, China
  • 3Department of Engineering Physics, Tsinghua University, Beijing 100084, China
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    Figures & Tables(12)
    Neutron energy spectrum of a 241Am-Be source
    SRNR models
    Model of shadow cone
    Neutron energy spectrum distribution at each point of test under different FRNR
    Dose rate of each point of test under SRNR
    Neutron energy spectrum distribution at each point of test under half-cubical type SRNR
    Dose rate of each point of test under three kinds of reference neutron radiation (shielding material:concrete)
    Neutron energy spectrum distribution at 0.75 m point of test under three kinds of reference neutron radiation (shielding material:concrete)
    • Table 1. The dose rate of each point of test and the contribution proportion of air scattering in FRNR and air FRNR

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      Table 1. The dose rate of each point of test and the contribution proportion of air scattering in FRNR and air FRNR

      distance/mdose rate/(μSv·h−1) ④the contribution proportion of air scattering obtained by shadow-cone method(③/①)/% ⑤the theoretical contribution proportion of air scattering[(②—①)/①]/%
      ①FRNR②FRNR+air③FRNR+air+ shadow cone
      0.7552.0152.240.701.350.44
      0.8540.4940.690.521.280.49
      0.9532.4232.590.421.300.52
      1.0526.5326.690.361.360.60
      1.1522.1222.260.321.450.63
      1.2518.7218.850.281.500.69
      1.3516.0516.170.251.560.75
    • Table 2. The contribution proportion of scattered neutron dose rate at each point of test under SRNR (shadow-cone method)

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      Table 2. The contribution proportion of scattered neutron dose rate at each point of test under SRNR (shadow-cone method)

      typecontribution proportion at different distance/%
      0.75 m0.85 m0.95 m1.05 m1.15 m1.25 m1.35 m
      Notes:A—polyethylene containing 5% boron,B—concrete;1—half-cubical type,2—cubical type
      A18.2910.0311.9314.0016.1618.4220.77
      A28.5610.7313.1915.8918.7021.3322.90
      B117.1121.2725.8030.7035.9441.5247.57
      B218.6223.8929.7736.2343.1650.1855.99
    • Table 3. The contribution proportion of scattered neutron dose rate at each point of test under SRNR (theoretical value)

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      Table 3. The contribution proportion of scattered neutron dose rate at each point of test under SRNR (theoretical value)

      typecontribution proportion at different distance/%
      0.75 m0.85 m0.95 m1.05 m1.15 m1.25 m1.35 m
      Notes:A—polyethylene containing 5% boron,B—concrete;1—half-cubical type,2—cubical type
      A17.529.3511.3213.3915.5917.9120.37
      A28.0910.3813.0216.0219.4523.3627.85
      B116.5920.8125.3730.3235.6441.3547.45
      B218.7024.0530.2137.2445.3454.7265.89
    • Table 4. The contribution proportion of scattered neutron dose rate at each point of test under three kinds of reference neutron radiation (shielding material:concrete)

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      Table 4. The contribution proportion of scattered neutron dose rate at each point of test under three kinds of reference neutron radiation (shielding material:concrete)

      typecontribution proportion at different distance/%
      0.75 m0.85 m0.95 m1.05 m1.15 m1.25 m1.35 m
      Notes:1—half-cubical type,2—cubical type
      FRNR+airshadow-cone method1.351.281.301.361.451.501.56
      ARNRshadow-cone method10.9713.6516.5719.6922.9926.4630.07
      SRNR(1)shadow-cone method17.1121.2725.8030.7035.9441.5247.57
      SRNR(2)shadow-cone method18.6223.8929.7736.2343.1650.1855.99
      FRNR+airtheoretical value0.440.490.520.600.630.690.75
      ARNRtheoretical value10.4813.1216.0119.0722.3625.7629.37
      SRNR(1)theoretical value16.5920.8125.3730.3235.6441.3547.45
      SRNR(2)theoretical value18.7024.0530.2137.2445.3454.7265.89
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    Song Zhang, Biao Wei, Yixin Liu, Benjiang Mao, Yikun Qian, Yuchen Huang, Peng Feng. Monte Carlo simulation research on reference neutron radiation of 241Am-Be radionuclide[J]. High Power Laser and Particle Beams, 2020, 32(5): 056001

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    Paper Information

    Category: Nuclear Science and Engineering

    Received: Dec. 22, 2019

    Accepted: --

    Published Online: Apr. 24, 2020

    The Author Email: Feng Peng (coe-fp@cqu.edu.cn)

    DOI:10.11884/HPLPB202032.190478

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