放射核種於核電廠地下水安全分析之傳輸特性研究

The safety analysis of radionuclides transportation characteristics through groundwater of nuclear power plant

温世烽(Wen, Shih Feng)

指導教授 ： 馮玉明 ； 林志宏

國立清華大學/原子科學院/工程與系統科學系/碩士(2015年)

摘要

地下水汙染分析已是現今社會追求環境保護中不可或缺的一部分。因此，對於任何潛在的汙染威脅，抑或是汙染發生後，第一時間分析並處理的重要性日益提升。核能電廠除役最終目的便是解除管制，讓廠區內土地在除役完成之後能夠轉做其他用途，而要達成此一目的就必須先瞭解廠區內建築物及土壤內所殘留之放射性活度，以及污染擴散模式。由於核能電廠於除役期間可能會有部分放射性物質因意外或操作不慎外釋，因此汙染源之特性，位置，核種傳輸之方向預測將是重要的工作。本研究主要將分成兩部分，第一，採用汙染傳輸分析方法，進行核能電廠產生之放射核種對於廠內環境之影響評估。針對核能電廠可能之放射性核種外洩位置，核種種類，外釋深度去建立一核種遷移擴散之資料庫。第二，對於前部分模擬出之傳輸現象做資料處理，並透過統計軟體加以分析處理，並探討如何調整統計軟體不同的訓練方式可以得到較佳之預測結果。最終可藉由前述兩部分之結果做整合，並對於汙染源頭之追溯，汙染範圍，以及汙染發生之時間做出預測。並作為核能電廠除役時之汙染物總量之評估依據，以作為電廠廠址釋出狀況之決定。

關鍵字

核能電廠 ； 地下水 ； 環境汙染

並列摘要

Groundwater contamination analysis is an essential part in modern society. For any potential contamination, it is important to deal with it as soon as possible. The destination of decommission of NPPs is deregulation and the land of NPPs can be transferred to other purposes. To achieve this, we should make a full investigation of radionuclide activities and the model of diffusion of contamination around the land. Some radionuclides may be discharged to the environment due to human negligence or improper operation; therefore, it is significant to predict the properties, location, the direction of radionuclides transport. This research is mainly divided into two parts. First, CFD (Computational Fluid Dynamics) analysis is adopted, taken into account of NPPs environment. This research will build a database depending on different releasing location and depth, different kinds of radionuclides. Second, with the data above dealt, we will analyze them will statistical program, training them with different methods to get best prediction results. At last, we can integrate both parts to trace the sources of contamination, ranges of pollution, time after it happened. Then, the status of decommission can be determined according to these results.

並列關鍵字

Nuclear Power Plant ； groundwater ； contamination

參考文獻

[13] Groundwater Hydraulics and Pollutant Transport，Randall J. Charbeneau，2000

[16] M. P. Anderson and W. W. William, “Applied groundwater modeling: Simulation of flow and advective transport,” Academic Press, Inc., San Diego, 1992.

[18] M. C. Hill and C. R. Tiedeman, “Effective Groundwater Model Calibration, With Analysis of Data, Sensitivities, Predictions, and Uncertainty,” John Wiley and Sons, 2007.

[19] C. Zheng and G. D. Bennett, “Applied contaminant transport modeling: Theory and practice,” John Wiley and Sons, 1995.

[20] J. F. Ahearne, “Radioactive waste: The size of the problem,” Physics Today, Vol. 50, 24-29, 1997.