为了评估放射性场所工作人员体内放射性剂量，常常使用全身计数器（ WBC ）探测人体的放射性，其探测效率对测量结果至关重要。研究使用蒙特卡洛方法对秦山三期的WBC的2个大面积NaI （Tl）探测器人体测量效率进行模拟，获得较好结果。研究结果表明，对能量从0．08keV～2MeV范围内误差最大为26．6％，对于身高150～180 cm的人体计数率的最大误差40％。%Whole-Body Counting was used to measure radiation dose of body in order to evaluate the internal exposure from inner -radionuclides of worker in radiation field .The efficiency of WBC detector is very impor-tant for measurement .The efficiencies of the two very large NaI (Tl) detectors (7.6 127 40.6 cm) which are used with the whole -body counter were simulated by Monte Carlo technology , good results were obtained .As a result, the relative error is 26.6%for energy from 0.08keV to 2 MeV.The discrepancy of different height a-dult person (150~180 cm) was within 40%.
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