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Analytical solution on temperature evolution in three-layer barrier high-level radioactive waste repository and required pre-cooling time determination
被引：3
|作者：
He, Luqiang
[1
]
Sun, De'an
[1
,3
]
Zhou, Xiangyun
[2
,4
]
Xu, Xun
[1
]
机构：
[1] Shanghai Univ, Sch Mech & Engn Sci, Shanghai 200444, Peoples R China
[2] Nanjing Inst Technol, Inst Civil Engn & Intelligent Management, Nanjing 211167, Peoples R China
[3] 99 Shangda Rd, Shanghai 200444, Peoples R China
[4] 1 Hongjing Ave, Nanjing 211167, Peoples R China
关键词：
Deep geological disposal;
Analytical model;
Thermal analysis;
Fully analytical solution;
High-level radioactive waste;
PERFORMANCE;
D O I：
10.1016/j.ijthermalsci.2023.108688
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
An analytical model of the temperature field in a high-level radioactive waste (HLW) disposal repository containing three-layer barrier of bentonite blocks, bentonite pellets and surrounding rock was established, and a series of mathematical methods were used to obtain a fully analytical solution for the model, which can visually represent the relationships between temperature and various parameters and provide a reference for designing repository. Through comparisons to other existing analytical and numerical simulation results, the validity of our solution was verified. Subsequently, temperature evolution analyses of one-canister and one-panel conditions were performed using the derived solution. Additionally, the temperature evolution at the point where peak temperatures are expected (i.e., midheight of central canister's side surface in one disposal panel) was investigated with different geometric design dimensions, and it was observed that temperature remains virtually unchanged when the tunnel spacing exceeds 40 m. The required precooling times for four types of HLW under different geometric and thermal parameters were analyzed using the obtained solution, with all canisters considered in one disposal panel.
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页数：21
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