期刊论文

中文

核电子学与探测技术

0258-0934

2021

41

5

866-872

10.3969/j.issn.0258-0934.2021.05.024

本校为第一机构

锆合金包壳管是核燃料棒最基本的组成部分,其外壳涂有一层陶瓷氧化膜涂层用于提升耐磨和力学强度。为了能有效检测外层陶瓷氧化膜缺陷情况,本论文提出一种在直流激励下对膜层不同两点间的电位差来表征缺陷情况,采用Buck电路和线性稳压电路相结合的拓扑结构,实现0～100 V,精度为0.5%可程控调节的直流激励源,再通过ADA4625芯片对被测试件表面的纳安级电流进行检测;并对测量的数据进行多项式拟合,以此来进一步表征缺陷情况。并通过大阻值样品进行了验证,结果证明该方法和检测电路符合锆合金表面陶瓷表面膜层检测的要求。

The zirconium alloy cladding is the most basic component of the nuclear fuel rod,and its shell is covered with a ceramic oxide film coating to improve wear resistance and mechanical strength.In order to effectively detect the defects of the outer ceramic oxide film,this paper proposes a potential difference between two different points of the film under DC excitation to characterize the defect,using a topology structure that combines a Buck circuit and a linear voltage regulator circuit.Achieve 0〜100 V,a programmable DC excitation source with ...