新型头部γ刀建设项目放射防护控制效果评价

Radiological protection assessment of construction project based on a new type of head γ knife

目的 评价新型头部γ刀机房的放射防护状态及防护设施的有效性、合理性,进而保证相关人员的健康安全.方法 依据国家有关法规和标准,结合建设单位提交的新型γ刀及机房的材料,进行现场调查和放射防护检测,然后综合分析评价.结果 新型头部γ刀性能检测结果满足GBZ 168-2005标准的要求;工作场所的周围剂量当量率在0.11～0.18 μSv/h,γ刀机房屏蔽满足放射防护要求;个人防护用品等放射防护设施和工作人员个人剂量监测、健康体检制度及相应的规章制度均达标.结论 该新型头部γ刀建设项目可有效控制放射性职业病危害因素,放射防护设施达到了竣工验收的要求.

Objective To evaluate the effectiveness of radiological protection and facilities for a new type of head γ knife to ensure the health and safety of the construction personnel.Methods According to the national relevant regulations and standards, the new type of γ knife and other materials were submitted by the construction unit, and the results of field investigation and detection of radiation protection were combined.All the materials were comprehensively analyzed and evaluated for safety and effectiveness.Results The performance test results of the new γ knife met the requirements of GBZ 168-2005.The ambient dose equivalent rate in the workplace was 0.11 μSv/h to 0.18 μSv/h;thus, shielding requirements were needed for radiological protection.In the radiological protective facilities, the health examination system and its corresponding rules and regulations were reasonable.Conclusions The construction of the γ knife can effectively control the risk factors of radioactive occupational diseases, and the radiation protection facilities can meet the requirements for approval to complete the construction.