深地層處置是國際間多年研究共同認為最安全且可行的用過核子燃料處置方法。 本文使用有限元素軟體Abaqus進行深地層處置概念進行瑕疵處置罐壓力分析、處置隧道斷面開挖與受震分析和處置罐剪力分析。 在瑕疵處置罐壓力分析，參考瑞典SKB文獻建立處置罐模型，並進行瑕疵模擬，探討處置罐承受膨潤土回脹壓力與冰河時期的冰川負載環境下的影響並與文獻平行驗證，且進行瑕疵與分析方法之影響分析。結果判定本研究案例分析模型與文獻[1]模型近似，且瑕疵位置上進行雙向的剝離機制較接近參考案例結果。 此外，在處置隧道斷面開挖與受震分析本文亦參考國內台電報告，建立二維模型模擬母岩內處置隧道開挖與利用動力分析下受震時之穩定分析，進而對於記錄點上進行主應力比較與文獻驗證，並進行邊界條件、地震加載方式與地震大小的機制影響分析。結果顯示受震與未受震對於處置隧道之主應力結果近乎相同。 最後，在處置罐剪力分析本文透過瑞典SKB報告與台電報告等相關文獻研究深地層處置罐受剪力之應力分析。因相關文獻定義處置罐最大容許應力為395MPa，故本研究之剪力分析結果與其有1.22之安全餘裕。 ;Deep geologic disposal is the most safe and feasibility of nuclear fuel final repository that have been evaluated and studied internationally.
Use the finite element software ABAQUS to simulate pressure analysis of the defective disposal canister, disposal of tunnel section excavation and seismic analysis and analysis of canister shear force.
In the pressure analysis of the defective disposal canister, the disposal canister model was established with reference to the Swedish SKB literature, and the defective simulation was carried out to investigate the effects of the disposal canister on the re-expansion pressure of the bentonite and the glacier load environment during the glacial period to verify with the literature, and carry out the impact analysis of the defect and analytical methods. As a result, counted the case analysis model of this study was similar to the literature model, and use the two-way delaminate mechanism at the defective position was closer to the reference case result.
In addition, in the excavation and seismic analysis of the disposal tunnel section is also refers to the domestic Taiwan power company’s report, establishes a two-dimensional model to simulate the stability of the tunnel under the excavation and utilization of the dynamic analysis of the rock, and then compare the principle stress on the recorded point and literature verification. And the impact analysis of boundary conditions, seismic loading methods and earthquake size. The results show that the quaked and unquaked results are nearly identical for the principle stress of the disposal tunnel.
Finally, in the analysis of the shear strength of the disposal canister, the present study the stress analysis of the shear force of the deep geologic disposal canister through the Swedish SKB report and the Taiwan power company’s report. The maximum allowable stress of the disposal canister is 395 MPa as defined by the relevant literature, so the shear analysis result of this study has a safety margin of 1.22.
