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目的:对核事故救援现场用热释光辐射剂量测量系统进行性能测试并建立实验室内自校准方法。方法:分别用现场热释光剂量读出器和实验室热释光剂量读出器对定量受照热释光剂量元件进行计数,计算相对标准差并比较;用现场热释光剂量读出器对不同受照剂量热释光剂量元件进行计数,采用最小二乘法进行线性拟合,计算线性偏差;分别用现场热释光剂量读出器和已核定过的实验室热释光剂量读出器对定量受照的热释光剂量元件检测计数,将实验室热释光剂量读出器计数推导出的个人剂量当量值Hp(10)作为约定真值,与现场用热释光剂量读出仪计数比较得其校准因子。结果:试验表明,现场用热释光剂量测量系统的重复性、线性均符合标准要求;自校的现场用热释光剂量测量系统与实验室剂量测量系统检测结果,无显著性差异。结论:现场用热释光剂量测量系统性能可靠;实验室内剂量自校准的方法结果可信,并且简便易行,是解决其特殊应用需求的有效途径。
OBJECTIVE: To test the performance of pyrometallurgical radiation dosimetry system at the site of nuclear accident rescue and establish self-calibration method in laboratory. Methods: Quantitative illuminated thermoluminescence dose components were counted by on-site thermoluminescence dose reader and lab thermoluminescence dose reader, respectively, and the relative standard deviations were calculated and compared. A field thermoluminescence dose reader The thermodynamic dosage components of different exposure dose were counted, and the linear deviation was calculated by the least squares method to calculate the linear deviation. The results were compared with the field thermoluminescence dose reader and the approved laboratory thermoluminescence dose reader Quantitative exposure of the thermoluminescence dose detection element count, the laboratory thermoluminescence dose reader derived personal dose equivalent value Hp (10) as the agreed true value, with the field thermoluminescence dose read out Instrument count compared to its calibration factor. Results: The experiment shows that the repeatability and linearity of the thermoluminescence dosimetry system on the spot meet the standard requirements. There is no significant difference between the on-site thermoluminescence dosimetry system and the laboratory dosimetry system. Conclusion: The performance of the thermoluminescence dosimetry system in the field is reliable. The method of self-calibration in the laboratory is credible and easy to operate. It is an effective way to solve the special application needs.