中性子線量計の測定における不確かさ

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書誌事項

タイトル別名
  • Estimation of Uncertainty for Neutron Dose Measurements
  • ―Estimation of Uncertainty for Calibration Constant of Neutron Survey Meter and Workplace Fields Dosimetry Using Neutron Survey Meter―
  • ―中性子サーベイメータの校正定数決定の不確かさ及び中性子サーベイメータを用いた作業場の線量測定における不確かさの評価―

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説明

<p>When performing radiation protection for neutrons at nuclear reactor workplaces, accelerator workplaces, and RI workplaces, etc. (hereinafter referred to as workplace), it is important that the measured values of neutron survey meters and personal dosimeters are reliable values. The reliability of measured values is estimated by measuring with calibrated measuring instruments which ensure the traceability, and then adding the accuracy to the measured value. Traceability-ensured calibration means that the results measured by using neutron survey meters etc. can be traced back to the standard value of the primary standard laboratory without interruption. The accuracy can be indicated by adding the estimated uncertainty. Here, the method of estimating uncertainty is introduced, then two examples of the estimation of uncertainty are also introduced; the first example is the uncertainty estimated when the end user’s neutron survey meter is calibrated in the secondary laboratory, and the second one is the uncertainty estimated when the end user measures neutron dose with neutron survey meters in the workplace. Note that neutron measuring instruments such as neutron survey meters, etc. do not have good response characteristics to neutron energy compared with the response characteristics of photo dosimeters to photon energy. Therefore, it should be fully noted that the measurement of the dosimetry in the workplace and the estimation of uncertainty are greatly affected by both response characteristics of dosimeters and neutron energy spectrum in the workplace.</p>

収録刊行物

  • 保健物理

    保健物理 56 (3), 116-122, 2021-10-12

    一般社団法人日本保健物理学会

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