燃料棒包壳管内表面残留氟含量测定方法研究  

Study on the Determination Method of the Residual Fluorine Content on the Inner Surface of the Fuel Rod Cladding Tube

作　　者：安身平[1] 李书良[1] 廖志海[1] 黄新树[1] 宁伟 任黎平 An Shenping;Li Shuliang;Liao Zhihai;Huang Xinshu;Ning Wei;Ren Liping(Science and Technology on Reactor Fuel and Materials Laboratory,Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]中国核动力研究设计院反应堆燃料及材料重点实验室,成都610213

出　　处：《核动力工程》2022年第1期116-121,共6页Nuclear Power Engineering

基　　金：国防技术基础科研质量与可靠性项目(Z012013T001)。

摘　　要：锆合金管材内表面残留氟可能会加速锆合金表面微裂纹的应力腐蚀,为准确测定锆合金管材内表面残留氟含量,本文通过试验研究,研制了专用的内表面残留氟提取装置并进行了高温水解条件试验;采用离子色谱法对提取出的氟离子进行测定,建立的分析方法可以实现快速连续测定,分析范围为0.05~1.0μg/mL,最后采用该方法对锆合金管材内表面残留氟含量进行了测定。结果表明,研制的装置可以完全提取内表面残留氟;本文提出的测定方法的加标回收率为98%~104%,最大相对标准偏差为3.9%,精密度和准确度高,测量结果满足生产需求。The residual fluorine on the inner surface of the zirconium alloy pipe might accelerate the stress corrosion of the microcracks on the surface of the zirconium alloy. In order to accurately determine the residual fluorine content in the zirconium alloy pipe, this paper developed a special internal surface residual fluorine extraction device through experimental research, and hightemperature hydrolysis conditions were studied;Ion chromatography was used to determine the extracted fluoride ions. The established analysis method could achieve rapid and continuous determination, and the analysis range was 0.05~1.0 μg/mL;finally, this method was used for zirconium alloy pipes. The residual fluorine content on the inner surface was measured. The results should that the extraction efficiency of the developed device for the residual fluorine on the inner surface could reach 101%;the recovery rate of the method was 98%~104%, the maximum relative standard deviation was 3.9%;with high precision and accuracy, the measurement results met the production needs.

关 键 词：燃料棒包壳管 内表面残留氟 高温水解 离子色谱 

分 类 号：TG115.3[金属学及工艺—物理冶金] TL27[金属学及工艺—金属学]