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高通量工程实验堆(HFETR)的运行经验表明,核素趋势分析法分析燃料元件破损存在一定弊端,包壳中核燃料的释放会影响核素分析法的准确性。针对HFETR套管型燃料元件,结合运行经验,以典型核素131I为例,通过分析燃料元件正常腐蚀产物与裂变产物的关系,研究燃料元件破损趋势,提出K值趋势判断法与核素区域判断法,并根据运行数据确定2种分析方法的准确性,确保反应堆的安全运行。
The operation experience of HFETR shows that there are some drawbacks to analyzing the damage of fuel element by the radionuclide trend analysis method. The release of nuclear fuel in the cladding will affect the accuracy of the radionuclide analysis method. In view of the HFETR casing type fuel element, combined with the operation experience, taking typical radionuclide 131I as an example, the relationship between normal corrosion products and fission products of fuel element is analyzed to study the tendency of fuel element damage, and the K value trend judgment method and radionuclide area judgment Method, and based on operational data to determine the accuracy of the two analytical methods to ensure the safe operation of the reactor.