Abstract One of the core problems of waste canisters layout in high-level radioactive waste repository is the evolution of the temperature field. On basis of the layered thermal analysis model for single waste canister, the expression of temperature increment at any location in surrounding rock in the repository was obtained by the superposition principle. The initially estimated value of the canister spacing (CS) was determined according to the temperature design criterion. Finally, the influence of relevant parameters on the canister surface temperature (CST) was analyzed. The results were drawn as follows: (a) Taking thermal conductivities of 2.4 and 2.8 W/(m × K) for the rock as examples, the appropriate CS is 12.2 and 13.5 m under the tunnel spacing of 40 m, respectively. (b) The greater the CS, the greater the thermal conductivity of bentonite and rock, the smaller the CST would be. (c) The thicker the buffer layer, the less the heat flux inside the canister would spread out.

中文翻译：

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高放核废料处置库罐间距

摘要 高放废物处置库废物罐布局的核心问题之一是温度场的演化。以单个废物罐分层热分析模型为基础，利用叠加原理得到了处置库围岩任意位置温度增量的表达式。罐间距 (CS) 的初始估计值是根据温度设计标准确定的。最后，分析了相关参数对罐表面温度（CST）的影响。结果如下： (a) 以岩石的热导率为2.4和2.8 W/(m × K)为例，在40 m的隧道间距下，合适的CS分别为12.2和13.5 m。(b) CS 越大，膨润土和岩石的导热系数越大，CST 越小。(c) 缓冲层越厚，罐内的热通量扩散得越少。