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有关快堆氧化物燃料与不锈钢包壳的化学相互作用(FCCI),即包壳内壁腐蚀,近年来人们提出了一系列经验公式。但是都各自适用于有限的参数范围,本文在分析与腐蚀直接相关的各因素的基础上,导出了计算腐蚀量的一种较为通用的表达式,并且通过引用劳伦斯(L.A.Lawyence)等人提出的公式中的一些常数和其它文献中的数据,确定了上述公式中的系数和常数。用这个公式验算了不同来源的数据,其结果与实验相符。由此证明,它具有较大的适用范围,在此基础上,用该公式推算了商用快堆包壳内壁腐蚀。如果要求商用快堆元件的堆内停留时间达到2—3年,则内壁最大腐蚀量(按95%置信度,燃料初始 O/M=1.97)会达到130—160微米。
In recent years, a series of empirical formulas have been proposed for the chemical interaction between fast reactor oxide fuel and stainless steel cladding (FCCI), that is, the inner wall of cladding. However, each of them is suitable for a limited range of parameters. Based on the analysis of various factors directly related to corrosion, this paper derives a more general expression for calculating the corrosion volume, and by reference to LALawyence et al. Some of the constants in the formulas and those in the other literature determine the coefficients and constants in the above formula. Using this formula, the data from different sources were calculated and the results were in agreement with the experiment. It proves that it has a larger scope of application, on this basis, using this formula to calculate the corrosion of the inner wall of the commercial fast reactor cladding. Maximum on-wall corrosion (up to 95% confidence, initial fuel O / M = 1.97) will reach 130-160 microns if reactor on-reactor residence time of 2 to 3 years is required.