Snell 实验具有良好的快堆基准特性。本文评价了各家的实验结果,认为 Chezem 的室外测量结果可以作为检验核数据时的积分基准。计算 Snell 实验的理论模型是:堆芯可以是任何快堆基准临界装置,反射层是100—140cm 厚的天然铀,平衡谱的位置选在距外边界20—40cm 处为宜。计算时需要防止 K_(eff)引起平衡谱的畸变。 Snell experiments have good fast reactor benchmarking characteristics. This paper evaluates the results of each experiment and concludes that Chezem’s outdoor measurements can be used as an integral basis for testing nuclear data. The theoretical model for calculating the Snell experiment is that the core can be any fast reactor baseline critical device, the reflective layer is 100-140 cm thick natural uranium, and the balance spectrum position is chosen to be 20-40 cm from the outer boundary. Calculations need to prevent the K_ (eff) caused by the balance spectrum distortion.