One of the objectives of the EMPIR project 16ENV04 “Preparedness” is the harmonization of methodologies for the measurement of doses with passive dosimetry systems for environmental radiation monitoring in the aftermath of a nuclear or radiological event. In such cases, measurements are often performed at low radiation dose rates, close to the detection limit of the passive systems.

The parameters which may affect the dosimetric results of a passive dosimetry system are analyzed and four laboratories quantitatively evaluate the uncertainties of their passive dosimetry systems. Typical uncertainties of five dosimetric systems in four European countries are compared and the main sources of uncertainty are analyzed using the results of a questionnaire compiled for this specific purpose.

To compute the characteristic limits of a passive dosimetry system according to standard ISO 11929, the study of the uncertainty of the system is the first step. In this work the uncertainty budget as well as the characteristic limits (decision thresholds and detection limits) are evaluated and the limitations and strengths of a complete analysis of all parameters are presented.

EMPIR项目16ENV04“准备”的目标之一是在核或放射事件发生后，采用用于环境辐射监测的被动剂量学系统来协调剂量测量方法。在这种情况下，测量通常是在低辐射剂量率下进行的，接近于无源系统的检测极限。

分析可能影响无源剂量系统的剂量学结果的参数，并由四个实验室定量评估其无源剂量系统的不确定性。比较了欧洲四个国家中五个剂量系统的典型不确定性，并使用为此目的而编制的问卷调查结果分析了不确定性的主要来源。

要根据标准ISO 11929计算无源剂量测定系统的特性极限，第一步就是要研究系统的不确定性。在这项工作中，对不确定性预算以及特征极限（决策阈值和检测极限）进行了评估，并提出了对所有参数进行完整分析的局限性和优势。