核能為現階段重要替代能源，然而用過核燃料具高放射性與長半衰期，其最終處置已成為全球亟需因應的課題。深層地質處置因能保障長期隔離與穩定，被視為當前最具可行性與安全性的解決方案。 其中，水平鑽孔處置法兼具結構穩定、施工效率高與配置彈性等優勢，隨地下工程技術進步逐漸受到重視，可望成為地質處置的新興替代方案。其設計與安全評估，須充分考慮衰變熱對材料性能與整體結構安全的影響。因此，瞭解系統熱傳行為與溫度演變趨勢為必要關鍵步驟。 本研究以 Deep Isolation, Inc. 所提出之水平鑽孔處置場設計為基礎，透過有限元素分析軟體 ABAQUS 建構模型並進行模擬，與既有研究結果比對以驗證等效模型可靠度與適用性。此外，本研究建立程式自動化模擬流程，系統性探討材料性質及幾何變化對溫度分布之影響。亦初步探討金屬材料層腐蝕行為與壽命預測方式。 ;Nuclear energy is currently a significant alternative energy source; however, spent nuclear fuel exhibits high radioactivity and a long half-life, making its final disposal a pressing global issue. Deep geological disposal, which can ensure long-term isolation and stability, is regarded as the most feasible and safest solution to date. Among disposal methods, the horizontal drillhole disposal method offers advantages such as structural stability, high construction efficiency, and flexible configuration. With advances in underground engineering technology, it has gradually attracted increasing attention and is expected to become an emerging alternative for geological disposal. In its design and safety assessment, the impact of decay heat on material properties and overall structural integrity must be carefully considered. Therefore, understanding the system’s thermal behavior and temperature evolution trends is a critical and necessary step. This study is based on the horizontal drillhole disposal design proposed by Deep Isolation, Inc. Finite element modeling and simulations were conducted using ABAQUS, and the reliability and applicability of the equivalent model were validated through comparisons with existing studies. Furthermore, an automated simulation workflow was developed to systematically investigate the effects of material properties and geometric variations on temperature distribution. Additionally, a preliminary investigation was conducted on the corrosion behavior of metallic material layers and methods for lifetime prediction.
