| 贫铀/聚乙烯交替球壳中裂变反应率的测量与分析 |
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| 引用本文： | 严小松,羊奕伟,朱通华,刘荣,鹿心鑫,蒋励. 贫铀/聚乙烯交替球壳中裂变反应率的测量与分析[J]. 原子能科学技术, 2013, 47(3): 462-467. DOI: 10.7538/yzk.2013.47.03.0462 |
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| 作者姓名： | 严小松 羊奕伟 朱通华 刘荣 鹿心鑫 蒋励 |
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| 作者单位： | 1.中国工程物理研究院 核物理与化学研究所，四川 绵阳621900;2.清华大学 工程物理系，北京100084 |
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| 基金项目： | ITER计划专项国内配套研究资助项目 |
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| 摘 要： | 为校验次临界能源堆的概念设计，采用活化法在贫铀/聚乙烯球壳交替装置上开展14 MeV中子学积分实验。用HPGe探测器测量238U(n,f)及235U(n,f)反应的裂变碎片143Ce衰变产生的293.3 keV特征γ射线，得到装置中与入射D粒子束成90°方向上的238U(n,f)及235U(n,f)反应率分布，相对不确定度为5.1%~6.9%。采用MCNP5程序在ENDF/B-Ⅵ库下进行模拟计算，计算结果较实验结果高约5%。
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| 关 键 词： | 14 MeV中子, 235U裂变')" >235U裂变, 238U裂变')" >238U裂变, 蒙特卡罗模拟 |
Measurement and Analysis of Fission Rate in Alternate Depleted Uranium/Polyethylene Shells |
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| YAN Xiao-song , YANG Yi-wei , ZHU Tong-hua , LIU Rong , LU Xin-xin , JIANG Li. Measurement and Analysis of Fission Rate in Alternate Depleted Uranium/Polyethylene Shells[J]. Atomic Energy Science and Technology, 2013, 47(3): 462-467. DOI: 10.7538/yzk.2013.47.03.0462 |
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| Authors: | YAN Xiao-song YANG Yi-wei ZHU Tong-hua LIU Rong LU Xin-xin JIANG Li |
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| Affiliation: | 1.Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China; 2.Department of Engineering Physics, Tsinghua University, Beijing 100084, China |
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| Abstract: | In order to check the conceptual design of the subcritical blanket in fusion-fission hybrid reactor, an integral experiment was carried out in alternate depleted uranium/polyethylene shells with 14 MeV neutron using activation technique. The 238U(n,f) and 235U(n,f) reaction rates at 90° direction to the incident D beam were determined by measuring the 293.3 keV γ ray emitted from 143Ce which is generated by 238U(n,f) and 235U(n,f) reactions. The experiment was simulated using MCNP5 code with ENDF/B-Ⅵ library, and the calculated 238U(n,f) and 235U(n,f) reaction rates are generally 5% higher than experimental results. |
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| Keywords: | 14 MeV neutron 235U fission 238U fission Monte Carlo simulation |
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