本文叙述了研究性重水反应堆改建过程中辐射防护工作的计划和实践。改建期间(1978.12—1980.6)工作人员的集体剂量当量为168人·雷姆。每人每年平均所受外照射剂量当量为0.49雷姆。~(60)Co 是辐射的主要来源。稳定性钴在重水一次回路表面的分布是均匀的。反应堆内壳的放射性强度:~(60)Co 为24居里;~(65)Zn 为6.9居里,研究性重水反应堆改建的目的是:更换已运行二十多年的反应堆内壳,改变堆芯结 This article describes the plan and practice of radiation protection in the process of reconstruction of research heavy water reactors. During the remodeling period (1978.12-1980.6), the collective dose equivalent of staff was 168 persons, Rehm. The average amount of external radiation dose per person per year is 0.49. ~ (60) Co is the main source of radiation. The stability of cobalt in the heavy water primary circuit surface distribution is uniform. Reactor inner shell radioactivity: ~ (60) Co is 24%; ~ (65) Zn is 6.9%. The purpose of the research is to replace the reactor inner shell that has been in operation for more than 20 years and change the reactor Core knot