由於熔鹽式核反應器（Molten Salt Reactor, MSR）為一液態核燃料系統，可在運轉同時視需求調整其系統組成，例如線上添加燃料或抽取分裂產物等動作，與傳統固態核燃料反應器相當不同，故現有中子物理計算常用的方法與工具皆無法直接滿足熔鹽式核反應器之系統設計與研究的需求。為了探討MSR相關的爐心特性與應用，本研究主要目標是發展適用於MSR爐心物理相關的計算方法與工具。
爐心物理計算主要為中子遷移計算以及燃耗計算，基於SCALE6.1中TRITON序列所提供完善的爐心燃耗計算能力，本研究開發建立了（1.）『1_REFRESH.f90』用以模擬線上熔鹽組成處理；（2.）『2_KEFF.f90』用以搜尋有效增值因數；（3.）『3_CRITICAL.f90』用以檢測線上熔鹽組成處理結果及修正；這三個獨立程式可模擬出MSR線上燃料添加與分裂產物移除的運轉特性，再配合以MS-DOS命令所建立的批次檔（Batch File）來自訂程式執行控制程序，即可合理地模擬追蹤MSR的動態爐心行為。為了加強使用上的便利，另外在計算前後建立兩個程式『0_START.f90』與『4_RESULT.f90』，第一個程式可用來產生與使用者設定相關之批次檔；第二個程式則用來收集計算結果並能將數據加以整理，兩個程式的開發目的是以降低使用者在操作上的困難度以及增加後續資料處理上的便利性。
為了驗證與使用開發之MSR自動化計算程序，本研究最後探討以下兩種熔鹽式核反應器的爐心行為，（1.）重覆俄羅斯設計的Molten Salt Actinide Recycler & Transmuter（MOSART）研究，並且探討線上燃料添加與分裂產物移除之參數對爐心的影響；（2.）以ORNL設計的Molten Salt Reactor Experiment（MSRE）為範本，嘗試建立以生產核醫藥物Mo-99為主之低功率運轉MSR模型。

致謝 i
摘要 ii
目錄 iii
圖目錄 v
表目錄 viii
第一章 緒論 1
1.1 熔鹽式反應器（MSR）簡介 1
1.2 文獻回顧 3
1.2.1 MSRE 3
1.2.2 MOSART 5
1.2.3 MSR爐心物理計算 6
第二章 計算工具程式介紹 8
2.1 SCALE 8
2.2 SCALE/TRITON 8
第三章 MSR自動化計算程序開發 12
3.1 MSR自動化計算程序的構想 12
3.2 MSR自動化計算程序的建立 17
3.2.1 控制程序的參數設定 17
3.2.2 自動化子程式的說明 22
3.2.3 輸出檔案的說明 27
第四章 應用一：MOSART爐心物理參數探討 32
4.1 MOSART模型建立 32
4.2 分裂產物元素移除組合的影響 34
4.3 特定分裂產物元素移除的影響 42
4.4 移除週期長度不同的影響 47
4.5 可溶性分裂產物移除比例的影響（固定處理週期30天） 51
第五章 應用二：以小型MSR生產Mo-99元素之探討 57
5.1 MSRE用於Mo-99生產之可能性探討 57
5.1.1 MSRE模型建立 57
5.1.2 控制棒全出與全入的比較 58
5.1.3 線上處理的模擬 61
5.2 三種小型MSR爐心組態的設計 64
5.2.1 運轉策略(1)：直接燃耗 67
5.2.2 運轉策略(2)：考慮線上處理程序（燃料添加且移除不可溶分裂產物） 68
5.2.3 運轉策略(3)：運轉策略(2)再多考慮移除一定比例的可溶性分裂產物 82
5.3 HomoType反應器TRU濃度變化異常的探討 84
5.3.1 SCALE/T6-DEPL與MCNP程式分析結果的比較 85
5.3.2 改變線上處理週期測試 86
5.3.3 改變截面資料庫來源測試 87
5.3.4 爐心核種簡化測試 89
5.3.5 HomoType反應器模型簡化 90
5.3.6 改變F-19在爐心中含量的測試 94
5.4 HeteType反應器爐心設計的進一步探討 95
5.4.1不同熔鹽選擇對爐心物理的影響 95
5.4.2 改變燃料通道半徑測試 100
5.4.3 增加反射體測試 101
5.4.4 HeteType+R反應器長時間運轉比較 102
第六章 結論 106
參考文獻 108

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