| 缓发中子有效份额的测量及计算方法 |
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| 引用本文： | 余纲林,李成龙,王侃,杨鑫,陈利高. 缓发中子有效份额的测量及计算方法[J]. 清华大学学报(自然科学版), 2012, 0(7): 896-900 |
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| 作者姓名： | 余纲林 李成龙 王侃 杨鑫 陈利高 |
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| 作者单位： | 清华大学工程物理系 |
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| 基金项目： | 国家自然科学基金项目(91126017) |
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| 摘 要： | 缓发中子有效份额βeff是反应堆重要的动态参数,研究仅基于实验数据的βeff测量方法很有意义。首先,采用多路定标器(multi channel system,MCS)时间多道卡搭建数据采集平台,在清华大学工程物理系反应堆物理实验室的次临界装置上展开微观中子噪声的实验工作,利用双区Rossi-α方法分析实验测量的结果,以数值拟合的方式得到βeff的数值;同时研究基于Monte Carlo方法的中子-光子输运程序(Monte Carlo N-particle transport code,MCNP)软件在βeff计算方面的应用,计算次临界装置的相关动态参数。实验测量结果与计算结果符合良好,确认了实验方法的有效性。
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| 关 键 词： | 缓发中子有效份额 次临界系统 Rossi-α方法 双区模型 |
Absolute measurements of the effective delayed neutron fraction |
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| YU Ganglin,LI Chenglong,WANG Kan,YANG Xin,CHEN Ligao. Absolute measurements of the effective delayed neutron fraction[J]. Journal of Tsinghua University(Science and Technology), 2012, 0(7): 896-900 |
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| Authors: | YU Ganglin LI Chenglong WANG Kan YANG Xin CHEN Ligao |
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| Affiliation: | (Department of Engineering Physics,Tsinghua University, Beijing 100084,China) |
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| Abstract: | The effective delayed neutron fraction,βeff,is a very important reactor dynamic parameter so absolute measurements of βeff are needed.A measurement system was developed using the multi-channel system(MCS) card to measure the delayed neuton fraction in a subcritical reactor based on the Rossi-α experiment with two region analysis method.βeff was then fit to the measured data.βeff was also calculated using the Monte Carlo N-particle transport code(MCNP) to calculate the dynamic parameters of the subcritical system to identify the major factors affecting βeff.The numerical fit is in good agreement with the Monte Carlo results. |
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| Keywords: | effective delayed neutron fraction subcritical system Rossi-α methodology two-region model |
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