1974年以来,我们对某核反应堆周围工作人员进行定期(基本上一年一次)健康观察,以积累小剂量照射对人体作用的资料,为反应堆的辐射防护和受照人员健康评价时参考。现将这方面的工作报道如下。一、观察对象及其受照剂量估计反应堆周围工作人员(受照组),男性,年龄18～30岁者占绝大多数,工龄l～12年。按工作岗位分为近堆组和远堆组,按工龄分为>5年组和≤5年组。根据剂量监测,人员尿中放射性、甲状腺放射性碘以及整体放射 Since 1974, we have regularly (basically once a year) health observations of workers around a nuclear reactor to accumulate information on the effects of low-dose irradiation on the human body for reference when evaluating radiation protection and health of irradiated personnel. The work of this area is reported below. First, the observed objects and their dose estimates Reactors around the staff (irradiated group), men, aged 18 to 30 years accounted for the vast majority, length of service l ~ 12 years. According to the job is divided into near stack group and far stack group, according to the length of service is divided into> 5 years group and <5 years group. According to dose monitoring, personnel urine radioactivity, thyroid radioactive iodine and the overall radiation