乾式貯存系統熱流模擬分析輔助軟體之開發

核能幾為現今人類不可或缺的能源，而使用核能發電後，勢必會產生用過核燃料，這些用過核燃料因為會持續發出衰變熱及放射線，它們的貯存一直是一個很麻煩的問題，沒有足夠的空間將造成核電廠無法繼續運轉，不安全的貯存則可能造成危險甚至是燃料毀損。乾式貯存系統已經被證實能有效的解決用過燃料的屯貯問題。目前我國雖然已自美國引進系統之雛型，但不論是建構適合臺灣使用的系統或是使用前的審核工作，都必須進行詳細的熱流模擬分析，對於這項需求，核能研究所適時引進商用CFD軟體Fluent來輔助分析工作的實行。目前的分析流程已趨於完善，並且在此套流程下所進行的分析工作在精確度上確實達到建構系統所需要的水準，但部份的流程卻為分析人員所垢病；例如過多重複性且無必要的計算工作，以及Fluent資料庫更新上的不便。本研究擬利用Visual Basic軟體撰寫自訂軟體ADSS，從以上問題點切入，將乾貯系統熱流分析中常需簡化之燃料組件與燃料提籃之均質化模式以及功率分佈預先模組化，並與Fluent資料庫作聯結，配合視窗化的操作介面，能使熱流模擬分析工作能更有效率。在此軟體完成後本研究也利用其特性，來確認用過核子燃料的結構改變是否會對乾式貯存系統的安全分析有重大的影響。

關鍵字

用過核子燃料；乾式貯存系統；視窗化操作介面； CFD ； Fluent

並列摘要

For modern people almost can’t live without Nuclear energy, we must face some problems which are made by Nuclear power. In the processes of nuclear power plants operation, spent fuel is definitely produced. The storage of the spent fuel is always a big problem. Insufficient of storage space can let power plants stop operate and unsafe storage can create nuclear disaster. Spent fuel dry storage system can do some help on that. We do introduce a system module from USA, but it’s not a system that suit for Taiwan. To design and construct a suitable system for Taiwan, we need to do CFD simulations. INER do these jobs with some helps from FLUENT. FLUENT is a commercial CFD program with strong ability. With the helping of FLUENT, INER get the accurate result of simulations. But some steps of simulations have disadvantages, like the iterations and hard on database renewing for FLUENT. With Visual Basic, we produce a new program, ADSS, to solve above problems. This program contains modulized calculation models for fuel assembly, homogenization model for fuel bundles and power distribution. It can also connect with FLUENT and with windows operation interface. This program can make the simulation processes be more effective. With ADSS’ characteristic, we also check if rod bowing could be a trouble on CFD simulations.

並列關鍵字

spent fuel ； Dry Storage System ； window operation interface ； CFD ； Fluent

參考文獻

17. 張庭碩, “利用FLUENT 進行高容量乾式貯存系統傳送護箱暫態熱流分析’, 國立清華大學, 碩士論文, 民國九十九年

16. 楊凱鈞, “高容量乾式貯存系統之等效熱阻與靈敏度分析以及熱傳改善研究”, 國立清華大學, 碩士論文, 民國九十九年

20. 林唯耕、施純寬、王仲容、曾永信、張睿恩、吳亮東, “核燃料束和燃料套管之等效熱傳性質及其VB操作介面應用程式之建立”,中國機械工程學會第二十七屆全國學術研討會論文集, 2010, AA12-003

19. Wei-Keng Lin, Chun-Khan Shih, Jong-Rong Wang, Yung-Shin Tseng, Jui-En Chang, “Mathematical Model for Design of Spent Fuel Dry Storage System”, ANS 2011 Winter Meeting, November, 2011, paper 4553

9. Yung-Shin Tseng, Jong-Rong Wang, Yi-Hsiang Cheng and Chunkuan Shih, “Validation Study of FLUENT for the Application of Dry-Storage System Thermal Analysis,” ICAPP 09 Tokyo, Japan, May10-14, 2009 Paper 9051.

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乾式貯存系統熱流模擬分析輔助軟體之開發

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