射线检测数字化成像技术在核电施工中应用可行性的研究

摘要

射线检测为核电施工中最主要的无损检测方法之一，每台机组建造过程中大概需要拍摄二十万套底片，而传统胶片照相检测技术存在诸多不足，故迫切需要寻求一种全新高质量的射线检测方法。数字化成像CR技术有希望替代胶片进行射线检测的技术，选定CR技术做为核电施工中运用可行性分析研究的主体，利用研发制造的验证性测试先进试块，对CR图像质量影响因素和CR技术特征进行测试研究。建立并使用庞大的缺陷试样库，制定并完善可运用于核电现场管道焊缝对比测试的工艺参数，实施对核电现场各系统管道焊缝CR技术和胶片技术的对比透照，进而从CR技术特点、技术可行性、应用经济性、操作适应性和便利性等角度对CR技术在核电施工中的应用进行可行性分析。%Ray detection is one of the main NDT methods in nuclear power construction . Each plant unit in the process of building will probably need to take two hundred thou‐sand sets of film .While the traditional film photographic detection technology has many disadvantages .Therefore ,there is an urgent need to seek a new kind of high quality ray detection method .Digital imaging CR technology is the most promising to replace the film imaging .The article selected the CR technology for the feasibility study subject of nuclear power construction .Using confirmatory test block ,the influence factors of the image quality and the technical characteristics of CR technology were tested and studied . By establishing and using large defect sample library ,process parameters w hich can be used in nuclear power piping weld contrast test was formulated and perfected .Contrast test of CR and film technology had been done to the plant pipe welds .From the techni‐cal features ,technical feasibility ,application of economy ,operation flexibility and con‐venience ,etc ,the feasibility analysis was completed to CR technology application in the nuclear power construction .