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目的针对大型辐照装置职业病危害放射防护预评价重点环节进行分析,为以后做同类预评价工作提供借鉴。方法以某大型辐照装置预评价为例,分别探讨安全装置设计评价、屏蔽设计验证计算、放射卫生管理评价三个方面内容。结果该项目拟设置的安全装置全面,屏蔽设计合理,放射卫生管理措施符合相关标准要求。结论大型辐照装置放射源活度大,在预评价中应尽量依照偏保守的原则进行评价,确保辐照装置安全运行。
Objective To analyze the key links of pre-evaluation of radiation protection for occupational hazards in large-scale irradiation equipment and provide reference for the same type of pre-evaluation work in the future. Methods The pre-evaluation of a large-scale irradiation device was taken as an example to discuss the contents of safety device design evaluation, shielding design verification calculation and radiation health management evaluation respectively. Results The safety device to be set up in this project was comprehensive, the shielding design was reasonable and the management measures of radiation health met the requirements of relevant standards. Conclusion Large-scale irradiation unit has a large activity of radioactive sources. In the pre-evaluation, it should be evaluated in accordance with the principle of partial conservativeness to ensure the safe operation of the irradiation unit.