放射工作人员职业内照射剂量系数变化分析

Change in occupational internal dose coefficients for radiation workers

目的通过对职业内照射剂数的变化分析,探讨其对放射工作人员内照射剂量估算的影响。方法选取41种核素作为研究对象,汇总其过去和新发布的职业剂量系数,通过计算其剂量系数比值分析其剂量系数变化。结果41种核素的职业内照射剂量系数均发生了变化,其比值范围为0.1~4.5,最大变化幅度达到10倍(比值等于0.1时)。结论建议及时修订我国涉及职业内照射剂量系数的标准,更新其职业内照射剂量系数,以便进一步完善放射工作人员的职业健康监护工作。

Objective To explore the effect of change in occupational internal dose coefficients on estimation of the internal exposure dose of radiation workers.Methods Forty-one radionuclides were selected as the research objects,and their new and old occupational internal dose coefficients were summarized.The change in internal dose coefficients was analyzed by calculating the ratios of dose coefficients and using the frequency distribution of ratios.Results The occupational internal dose coefficients of the 41 radionuclides analyzed had all changed,with ratios ranging from 0.1 to 4.5,and the maximum difference reaching 10 times(when the ratio was equal to 0.1).Conclusion It is recommended to revise the national standards concerning occupational internal dose coefficients in time and update the occupational internal dose coefficients,so as to better monitor the occupational health of radiation workers.