Simulation study on highly-enriched uranium components with reflector based on 252Cf source-driven noise analysis method
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摘要: 针对高浓缩铀部件外加的反射层材质及厚度之效应可以巧妙避开核查这一问题,依据252Cf中子源驱动噪声分析法原理,采用蒙特卡罗方法模拟研究了高浓缩球形金属铀部件的不同材料、厚度的反射层的效应,获得了相应的时间关联符合计数分布和中子产额。研究结果表明,对同一材料的反射层,反射层厚度愈大,中子产额愈大,即反射效果愈好。对于同一厚度的反射层,反射层材料的密度愈大,中子产额愈大,反射效果愈好。
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关键词:
- 高浓缩铀部件 /
- 反射层 /
- 252Cf源驱动噪声分析法 /
- 时间关联符合计数 /
- 中子产额
Abstract: For the highly-enriched uranium components with reflector can avoid fissile material measurements skillfully, according to the theory of source-driven noise analysis method, this paper analyzes the highly-enriched uranium components with reflector in different material and thickness and obtains time-correlation incidence count distribution and neutron net multiplication. The results show that for the same reflector, the thicker the reflector is, the better the reflectivity is; for different material reflectors, the denser the reflector is, the more the neutron net multiplication is. -
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