目的对某石油测井用中子源库改建后的防护效果进行检测评价,为放射源库建设提供依据。方法按照国家有关防护标准和监测规范进行剂量监测、评价。结果此改建后的测井用中子源库的布局,各种防护墙体、房顶及防护门的材料、厚度,源坑的设计、机械存取装置都达到防护要求。源库四周墙体外表面剂量为(2.3±0.8)μGy/n。结论此中子源库防护效果符合相应国家标准要求。 Objective To test and evaluate the protective effect of neutron source rebuilt in a petroleum logging well and provide a basis for the construction of radioactive source reservoirs. Methods Dose monitoring and evaluation according to the relevant national standards of protection and monitoring. Results After the rebuilding, the layout of the neutron source library for logging, the design of various protective walls, the materials and thickness of the roof and the protective door, the design of the source pit, and the mechanical access devices all met the protection requirements. The outer wall surface of the source reservoir around the dose (2.3 ± 0.8) μGy / n. Conclusion This neutron source bank protection effect in line with the corresponding national standards.