| 实验测量CFBR-Ⅱ堆启动Am-Be中子源的初始增殖倍数 |
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| 引用本文： | 杜金峰,李俊杰,艾自辉,刘贲,周浩军,郑春.实验测量CFBR-Ⅱ堆启动Am-Be中子源的初始增殖倍数[J].原子能科学技术,2013,47(4):619-623. |
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| 作者姓名： | 杜金峰 李俊杰 艾自辉 刘贲 周浩军 郑春 |
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| 作者单位： | 中国工程物理研究院 核物理与化学研究所，四川 绵阳621900 |
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| 摘 要： | 由于CFBR-Ⅱ堆原启动中子源252Cf源半衰期较短，中子发射率已降低至无法满足使用要求，因此采用半衰期较长的Am-Be中子源替代。通过分别测量252Cf源与Am-Be源在裸源情形下的计数率以及处于活性区中心时引起的泄漏中子计数率，建立比例关系，借助于252Cf源对应的初始增殖倍数间接给出了Am-Be源对应的初始增殖倍数，为反应堆运行提供参数。
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| 关 键 词： | 中子源 增殖倍数 计数率 反应性 |
Measurement of CFBR-Ⅱ Reactor’s Initialization Multiplication Started up by Am-Be Neutron Source |
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| DU Jin-feng,LI Jun-jie,AI Zi-hui,LIU Ben,ZHOU Hao-jun,ZHENG Chun.Measurement of CFBR-Ⅱ Reactor’s Initialization Multiplication Started up by Am-Be Neutron Source[J].Atomic Energy Science and Technology,2013,47(4):619-623. |
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| Authors: | DU Jin-feng LI Jun-jie AI Zi-hui LIU Ben ZHOU Hao-jun ZHENG Chun |
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| Affiliation: | Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China |
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| Abstract: | 252Cf neutron source was CFBR-Ⅱ reactor’s old start-up neutron source. Its neutron emissivity became too weak to be used because of short half life. Am-Be neutron source, which has long half time, was choosed to replace 252Cf neutron source. Neutron count rate arosed by bare 252Cf neutron source and bare Am-Be neutron source were measured respectively. Leakage neutron count rate of CFBR-Ⅱ reactor started up by these two kinds of sources were also measured respectively. According to these data, initialization multiplications of Am-Be source were gained in proportion to 252Cf source’s. These parameters were applied to CFBR-Ⅱ reactor’s running. |
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| Keywords: | neutron source multiplication count rate reactivity |
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