基于核径迹技术的中子个人剂量不确定度评定  

Evaluation The Uncertainty of Solid State Nuclear Track Technology on Neutron Individual Dose Monitoring

作　　者：翟贺争[1] 曹磊[2] 阮书州 郭泽钦[2] 王志超[2] 张仲健[1] 王巧娟[1] 魏超[1] 姜梅玲[1] 武权[1] 王小春[2] 

机构地区：[1]中国医学科学院北京协和医学院放射医学研究所,天津300192 [2]北京市化工职业病防治院,北京100093

出　　处：《南开大学学报（自然科学版）》2017年第1期35-39,共5页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：国家自然科学基金面上项目(81272511);天津市自然科学基金(11JCYBJC13700);中国医学科学院;北京协和医学院"中央级公益性科研院所基本科研业务费"(2016ZX310074);协和青年基金(3332015070;3332015101)

摘　　要：中子个人剂量测量不确定度是个人剂量检测报告的重要组成部分,用于评估职业人员中子个人剂量测量的可靠性和测量结果的可信程度.结合固体核径迹技术监测工作人员中子个人剂量的实际情况,建立数学模型,分析中子剂量刻度曲线、剂量计计数、系统测量重复性、能量依赖性及径迹蚀刻条件等监测过程中不确定度的来源,计算出合成标准不确定度和相对扩展不确定度.评定中子个人剂量不确定度,保证量值测量的准确性,关系到工作人员的职业和健康安全.结果表明,应用固体核径迹技术监测职业人员1个季度的中子个人剂量为0.18±0.05 m Sv,相对扩展不确定度为28%(k=2);提示应关注中子剂量刻度曲线、系统测量重复性及能量依赖性等不确定度的主要来源.将不确定评定方法应用于中子剂量测量实践,可为国内中子监测规范的制定提供一些基础依据.The uncertainty on neutron individual dose measurement is an important part of an individual dose report, for evaluating the reliability of solid state nuclear track technique and credibility of the measurement results. Evaluation of the uncertainty on neutron personal dose and ensuring the accuracy of the measured values, it is related to the quality of life and the health of radiation staff. To evaluate the uncertainty and ensure solid state nuclear track technique for neutron personal dose monitoring accuracy and reliability. Using the solid state nuclear track technology to monitor neutron individual dose of a radiation worker, and the uncertainty of measurement was determined by establishing mathematic model and calculating uncertainty of the neutron dose scale curve, dosimeter counting system measurement repeatability, energy dependence and track etch conditions in the monitoring process. The neutron individual dose of the worker was 0.18±0.05 m Sv, and the relative expanded uncertainty of solid state nuclear track technique on neutron personal dose monitoring was 28%（k=2）.The main source of the uncertainty on the neutron individual dose monitoring are neutron sensitivity curve scale, energy dependent and system measurement repeatability. It should be strictly control the factors of the measurement process to ensure neutron personal dose monitoring data accurate and reliable.

关 键 词：不确定度 固体核径迹技术 中子个人剂量监测 CR39 

分 类 号：TL72[核科学技术—辐射防护及环境保护] R144.1[医药卫生—公共卫生与预防医学]