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題名 | 核廢料深層處置周圍岩體之熱力-水力-力學偶合行為研究=Coupled Thermal-Hydrologic-Mechanical Analysis of Deep Rocks on the Geological Disposal for the Spent Nuclear Fuel |
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作者 | 柯建仲; 戴豪君; 涂家輝; 楊振成; 陳昭旭; Ke, Chien-chung; Tai, Hao-chun; Tu, Chia-huei; Yang, Jen-cheng; Chen, Chao-shi; |
期刊 | 臺灣公共工程學刊 |
出版日期 | 20060400 |
卷期 | 1:2 民95.04 |
頁次 | 頁15-31 |
分類號 | 449.8 |
語文 | chi |
關鍵詞 | 核廢料; 深層岩體; 熱力-水力-力學偶合行為; FLAC3D; TOUGH2; Spent nuclear fuel; Deep rocks; Thermo-hydro-mechanical behaviors; |
中文摘要 | 為了解深層岩體受高溫作用後,其溫度改變所產生之熱效應,對於深層岩體各種力學性質與水文性質之影響,本研究將利用FLAC3D與TOUGH2兩套數值分析軟體,模擬核廢料之深層處置,並探討熱力-水力-力學偶合(Coupled Thermo-Hydro-Mechanical)行為,研究分析在核廢料處置5年、10年、50年及100年等階段之岩體溫度分佈情形,並且在熱效應之影響下,分析飽和岩體之水流向,以了解實際深層岩體之熱力-水力-力學偶合行為。經過本文建立之THM模式分析後,在溫度分佈中發現,偶合後之岩體溫度分布有向上擴張之趨勢,使處置隧道之上部岩體溫度高於下部岩體,這與孔隙岩體之熱對流效應有關,與未經過偶合模擬之處置岩體,溫度等量向外擴張之熱傳導形式不同。並且發現,處置歷時100年之不同距離岩體溫度,與核廢料相同有熱衷減之現象,其熱效應影響距離約在400公尺內,且愈向外側則影響範圍愈小。而在處置岩體之水流向中發現,孔隙岩體的水流也有向上之趨勢,因此可知其孔隙岩層之熱對流現象主導水流方向以及溫度分佈。 |
英文摘要 | The disposal of spent nuclear fuel produced high temperature to affect the properties of deep rocks with thermo-mechanical and hydro-mechanical interactions. In this paper, two computer codes of TOUGH2 and FLAC3D were linked and executed for coupled analysis of thermo-hydro-mechanical (THM) behaviors in deep rocks. The analysis was simulated disposal of unclear waste which produced heat to effect the temperature spread of rocks and direction of fluid flow for 5,10, 50 and 100 years after deposition in porous rock mass. In this paper, the coupled model of THM was used to simulate the temperature field. We can find that, the temperature of above rocks is higher than below ones. Because the major heat transfer in porous rock mass is that heat convection, it is different with simulation by the uncoupled methods. The results show that the influence rang of heat transport within the rock mass is about 400m after 100 year. The water flow has convected upward in porous media and has indirect related to water flow and the temperature spread. |
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