世界核地质科学2025，Vol.42Issue(3)：630-639,10.DOI:10.3969/j.issn.1672-0636.2025.03.013
γ测井仪野外核查装置设计过程中的理论计算及验证
Theoretical calculations and validation in the design of field verification equipment for gamma loggers
摘要
Abstract
As the field verification standard for radioactive measuring instruments such as gamma loggers in uranium exploration work,radium sources have played a good role in controlling the metrological performance of the instruments.However,due to national security and environmental protection policies,the existing number of solid radium sources in China can hardly meet the increasing demand of uranium exploration workload,and there is an urgent need to carry out the development of alternative verification devices.It is planned to use natural uranium ore powder and other materials to develop verification devices to verify the radioactivity measuring instruments during the period.Based on the theory of γ radiation field,the relationship between the geometry of the verification device and the internal γ field was calculated,and it was experimentally verified that an annular column verification device with an internal bore diameter of 50 mm and an axial length of 600 mm can ensure that the center of the verification device has a saturated plateau area of 200 mm,leaving at least 100 mm redundancy for convenient detector placement.The internal irradiation volume rate is positively correlated with the thickness of the horizontally oriented ore layer before the saturation thickness is reached.The practical geometry of the γ logger verification device was determined by theoretical calculations,avoiding the waste of material and time in a large number of conservative designs.关键词
γ测井仪核查装置/几何尺寸/γ场理论/期间核查Key words
gamma logger verification device/geometry/gamma field theory/period verification分类
能源科技引用本文复制引用
唐晓川,杜一滨,王宇莹,管少斌,沈长枫..γ测井仪野外核查装置设计过程中的理论计算及验证[J].世界核地质科学,2025,42(3):630-639,10.基金项目
中国核工业地质局基础地质项目(编号:201732-3、201944-2)资助 Supported by Basic Geology Project of China Nuclear Geology(No.201732-3,201944-2) （编号:201732-3、201944-2）
