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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Reactor power history from fission product signatures

Sweeney, David J. 15 May 2009 (has links)
The purpose of this research was to identify fission product signatures that could be used to uniquely identify a specific spent fuel assembly in order to improve international safeguards. This capability would help prevent and deter potential diversion of spent fuel for a nuclear weapons program. The power history experienced by a fuel assembly is distinct and could serve as the basis of a method for unique identification. Using fission product concentrations to characterize the assembly power history would limit the ability of a proliferator to deceive the identification method. As part of the work completed, the TransLat lattice physics code was successfully benchmarked for fuel depletion. By developing analytical models for potential monitor isotopes an understanding was built of how specific isotope characteristics affect the production and destruction mechanisms that determine fission product concentration. With this knowledge potential monitor isotopes were selected and tested for concentration differences as a result of power history variations. Signature ratios were found to have significant concentration differences as a result of power history variations while maintaining a constant final burnup. A conceptual method for implementation of a fission product identification system was proposed in conclusion.
2

Reactor power history from fission product signatures

Sweeney, David J. 15 May 2009 (has links)
The purpose of this research was to identify fission product signatures that could be used to uniquely identify a specific spent fuel assembly in order to improve international safeguards. This capability would help prevent and deter potential diversion of spent fuel for a nuclear weapons program. The power history experienced by a fuel assembly is distinct and could serve as the basis of a method for unique identification. Using fission product concentrations to characterize the assembly power history would limit the ability of a proliferator to deceive the identification method. As part of the work completed, the TransLat lattice physics code was successfully benchmarked for fuel depletion. By developing analytical models for potential monitor isotopes an understanding was built of how specific isotope characteristics affect the production and destruction mechanisms that determine fission product concentration. With this knowledge potential monitor isotopes were selected and tested for concentration differences as a result of power history variations. Signature ratios were found to have significant concentration differences as a result of power history variations while maintaining a constant final burnup. A conceptual method for implementation of a fission product identification system was proposed in conclusion.
3

權力均衡: 釣魚台事件 : 從釣魚台事件看中、美、日、台的關係. / 釣魚台事件 / Quan li jun heng: Diaoyutai shi jian : cong Diaoyutai shi jian kan Zhong, Mei, Ri, Tai de guan xi. / Diaoyutai shi jian

January 1998 (has links)
顔鳳儀. / 論文(哲學碩士) -- 香港中文大學硏究院政治與行政學部, 1998. / 參考文獻: leaves 127-139. / 中英文摘要. / Yan Fengyi. / Chapter 第一章 --- 導言 --- p.1-6 / Chapter 一、 --- 研究重點 --- p.2-3 / Chapter 二、 --- 研究原因 --- p.3-4 / Chapter 三、 --- 硏究方法 / Chapter 甲、 --- 硏究性質 --- p.4-5 / Chapter 乙、 --- 資料來源 --- p.5 / Chapter 第二章 --- 評述權力均衡理論及探討基辛格 對均勢外交理念的構想 --- p.7-26 / Chapter 一、 --- 權力均衡理論 / Chapter 甲、 --- 現實主義學說 --- p.7-9 / Chapter 乙、 --- 權力均衡理論槪念之釐淸 --- p.9-16 / Chapter 二、 --- 均勢外交理念的構想 / Chapter 甲、 --- 尼克遜與基辛格在七十年代 制定美國外交政策的關鍵角色 --- p.17-19 / Chapter 乙、 --- 均勢外交之構想 --- p.20-26 / Chapter 三、 --- 分析架構 --- p.26 / Chapter 第三章 --- 歷史史實的描述 --- p.27-61 / Chapter 一、 --- 釣魚台的歷史背景 / Chapter 甲、 --- 一九七二年前的釣魚台歷史背景 --- p.27-33 / Chapter 乙、 --- 九十年代的釣魚台事件 --- p.33-35 / Chapter 二、 --- 一九七二年前的中、美、日、台的關係 / Chapter 甲、 --- 七十年代前的中美關係 --- p.36-42 / Chapter 乙、 --- 七十年代前的美日關係 --- p.43-49 / Chapter 丙、 --- 七十年代前的的中日關係 --- p.50-54 / Chapter 丁、 --- 轉變中的中、美、日關係 --- p.55-61 / Chapter 第四章 --- 運用權力均衡槪念去剖析釣魚台事件 --- p.62-116 / Chapter 一、 --- 美國一一「均勢體系」中的「均衡者」 --- p.62-79 / Chapter 甲、 --- 引言 --- p.62 / Chapter 乙、 --- 聯中制蘇 --- p.62-63 / Chapter 丙、 --- 釣魚台事件 / Chapter 1. --- 釣魚台對美國國防的重要性 --- p.64 / Chapter 2. --- 安撫日本 --- p.65-66 / Chapter 3. --- 均勢戰略考慮的長遠計謀 / Chapter (I) --- 遏制中國 --- p.67-74 / Chapter (II) --- 制約日本 --- p.75-77 / Chapter 丁、 --- 小結 --- p.77-79 / Chapter 二、 --- 日本一一「均勢體系」中的「從屬者」 --- p.80-95 / Chapter 甲、 --- 引言 --- p.80 / Chapter 乙、 --- 釣魚台對日本國防及經濟的重要性 --- p.80-82 / Chapter 丙、 --- 日本謀求成爲亞洲政治及軍事大國之野心 / Chapter 1. --- 美蘇冷戰格局下日本經濟迅速復興, 在九十年代成爲第二經濟大國 --- p.82-83 / Chapter 2. --- 日本經濟蓬勃發展後, 日本出現謀求成爲政治大國的野心 --- p.83-84 / Chapter 3 . --- 新保守主義思潮的興起 --- p.84-87 / Chapter 4 . --- 日本謀求成爲政治及軍事大國的障礙 --- p.87-89 / Chapter 5 . --- 日本明白美日同盟的重要性 --- p.89-91 / Chapter 丁、 --- 九六年日本遏制中國時機之來臨 / Chapter 1 . --- 《美日安保條約》的重新訂位 --- p.91-93 / Chapter 2 . --- 橋本內閣的重組 --- p.93-94 / Chapter 戊、 --- 小結 --- p.94-95 / Chapter 三) --- 台灣一一「均勢體系」的「從屬者」 --- p.96-104 / Chapter 甲、 --- 引言 --- p.96 / Chapter 乙、 --- 七十年代台灣低調處理釣魚台事件之分析 --- p.97-98 / Chapter 丙、 --- 九十年代台灣低調處理釣魚台事件之分析 / Chapter 1. --- 釣魚事件牽涉了兩岸關係 --- p.99-100 / Chapter 2. --- 爭取美日友好,以擴展台灣的國際生存空間 --- p.101-103 / Chapter 丁、 --- 小結 --- p.104 / Chapter 四) --- 中國一一「均勢體系」的 「被敵視者」 --- p.105-116 / Chapter 甲、 --- 引言 --- p.105 / Chapter 乙、 --- 七十年代中國低調處理釣魚台事件的分析 --- p.105-108 / Chapter 丙、 --- 九十年代中國低調處理釣魚台事件的分析 / Chapter 1. --- 出兵的顧慮 --- p.109-113 / Chapter 2. --- 不出兵的顧慮 --- p.113-115 / Chapter 丁、 --- 小結 --- p.116 / Chapter 第五章 --- 結語 --- p.117-126 / Chapter 一、 --- 中、美、日、台在釣魚台事件上所扮演的角色 --- p.118-121 / Chapter 二、 --- 「權力均衡」理論之適用性及現實性 --- p.121-126 / 主要參考書目(中文) / 主要參考書目(英文) / 主要參考報章雜誌

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