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High Power Laser and Particle Beams, Volume. 32, Issue 4, 046002(2020)

A passive efficiency calibration method with Monte Carlo simulation in segmented gamma scanning

Honglong Zheng1... Xianguo Tuo2,*, Jiayuan Gou1, Yao Wu1, Wei Zuo1, Yufei Guo1, Lin He1, Yanfang Liu1, Cong Huang1, Linfeng Yang1 and Wei Liu1 |Show fewer author(s)
Author Affiliations
  • 1Sichuan Engineering Laboratory for Nuclear Facilities Decommissioning and Radwaste Management, Sub-institute of Nuclear Power Institute of China, Chengdu 610005, China
  • 2Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (10)
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    References (9)
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    Figures & Tables(10)
    SGS measurement of nuclear waste drum

    Fig. 1. SGS measurement of nuclear waste drum

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    MCNP model of an HPGe detector

    Fig. 2. MCNP model of an HPGe detector

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    Calculation model of SGS efficiency

    Fig. 3. Calculation model of SGS efficiency

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    Distribution of segment efficiency

    Fig. 4. Distribution of segment efficiency

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    SGS experimental measurement

    Fig. 5. SGS experimental measurement

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    Positions of point source in the drum

    Fig. 6. Positions of point source in the drum

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    Efficiency matrices (aluminum silicate sample)

    Fig. 7. Efficiency matrices (aluminum silicate sample)

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    Comparison of reconstructed activity with two sets of parameters (F1 and F2 represent parameters calibrated by aluminum silicate and wood fiber respectively, as shown in Table 1)

    Fig. 8. Comparison of reconstructed activity with two sets of parameters (F1 and F2 represent parameters calibrated by aluminum silicate and wood fiber respectively, as shown in Table 1)

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    • Table 1. Parameters of efficiency function

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      Table 1. Parameters of efficiency function

      calibrating materialspacingparameter
      a1a2a3a4a5a6R2
      aluminum silicate0 layer between detector and segment−8.214−0.322−0.681−0.0340.101−0.6010.998
      1 layer between detector and segment−8.376−0.303−0.870−0.0510.110−0.5640.998
      2 layers between detector and segment−10.094−0.015−2.014−0.0140.2240.3460.996
      wood fiber0 layer between detector and segment−8.152−0.312−0.676−0.0310.102−0.7130.999
      1 layer between detector and segment−8.341−0.293−0.888−0.0470.111−0.6370.998
      2 layers between detector and segment−10.0520.011−2.098−0.0150.2310.2760.996

    • Table 2. Reconstructed activities and errors of 137Cs and 60Co

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      Table 2. Reconstructed activities and errors of 137Cs and 60Co

      samples No. activity in aluminum silicate/Bq(error/%)activity in wood fiber/Bq
      0.662 MeV1.173 MeV1.332 MeV0.662 MeV1.173 MeV1.332 MeV
      1#2.869×105(−7.74) 1.479×105(7.89) 1.403×105(2.33) 1.938×105(−37.68) 1.119×105(−18.35) 1.102×105(−19.54)
      2#3.025×105(−2.74) 1.591×105(16.08) 1.532×105(11.77) 2.138×105(−31.25) 1.265×105(−7.68) 1.197×105(−12.6)
      3#3.096×105(−0.46) 1.646×105(20.08) 1.512×105(10.32) 2.235×105(−28.15) 1.273×105(−7.09) 1.211×105(−11.64)
      4#3.079×105(−0.99) 1.468×105(7.07) 1.396×105(1.79) 2.129×105(−31.56) 1.239×105(−9.6) 1.199×105(−12.48)
      5#3.134×105(0.78) 1.582×105(15.39) 1.513×105(10.36) 2.199×105(−29.3) 1.265×105(−7.64) 1.215×105(−11.34)
      6#3.243×105(4.29) 1.640×105(19.61) 1.568×105(14.34) 2.474×105(−20.44) 1.347×105(−1.7) 1.302×105(−4.93)
      7#3.445×105(10.78) 1.739×105(26.81) 1.640×105(19.66) 2.972×105(−4.43) 1.567×105(14.35) 1.463×105(6.81)
      8#3.680×105(18.32) 1.803×105(31.52) 1.745×105(27.24) 3.579×105(15.07) 1.794×105(30.97) 1.708×105(24.65)
      9#3.316×105(6.63) 1.646×105(20.07) 1.572×105(14.68) 2.670×105(14.13) 1.442×105(5.28) 1.377×105(0.54)
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    Honglong Zheng, Xianguo Tuo, Jiayuan Gou, Yao Wu, Wei Zuo, Yufei Guo, Lin He, Yanfang Liu, Cong Huang, Linfeng Yang, Wei Liu. A passive efficiency calibration method with Monte Carlo simulation in segmented gamma scanning[J]. High Power Laser and Particle Beams, 2020, 32(4): 046002

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    Paper Information

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    Received: Oct. 29, 2019

    Accepted: --

    Published Online: Mar. 30, 2020

    The Author Email: Tuo Xianguo (tuoxg@cdut.edu.cn)

    DOI:10.11884/HPLPB202032.190416

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology