Absolute Reaction Rate Measurement With D-D Neutron Source in Polyethylene Spherical Shell
-
摘要: 利用D-D中子源/聚乙烯球壳模型,将裂变法和活化法结合,在聚乙烯球壳内水平方向的几个位置进行了反应率测量,获得了不同阈能的4种反应率的实验数据。裂变反应率结果的不确定度为2.5%~4.3%,活化反应率结果的不确定度约为6.3%。并利用MCNP程序进行了模拟计算,计算值均比测量值小,其中,238U的差别最大。Abstract: The absolute reaction rate distribution measurements in a polyethylene spherical shell with 38.6 cm outside diameter and 10 cm thickness were performed with D-D neutron source. By combining fission method and activation method, rich-uranium fission chamber, depleted-uranium fission chamber, 237Np fission chamber and 115In activation foils were placed at several positions on the equatorial line of the inner face of the shell, and the absolute reaction rates were obtained. The uncertainty of fission rates is 2.5%-4.3%, while the uncertainty of activation rates is about 6.3%. The reaction rates were calculated by MCNP and ENDF/B-Ⅶ.0. The calculated results are lower than the measured results and 238U is typical.
-
Keywords:
- polyethylene ,
- D-D neutron source ,
- reaction rate ,
- MCNP code
-
-
[1] 沈寄安. 聚变-裂变混合堆中子学积分实验[J]. 原子能科学技术,1995,29(5): 471-473.
SHEN Ji’an. The neutronics integral experiment in the fusion-fission hybrid reactor research[J]. Atomic Energy Science and Technology, 1995, 29(5): 471-473(in Chinese).[2] 陈渊, 刘荣, 郭海萍, 等. 中子学积分实验[J]. 核物理动态, 1995, 12(4): 54-57.
CHEN Yuan, LIU Rong, GUO Haiping, et al. Neutronics integral experiments[J]. Nucl Phys Rev, 1995, 12(4):54-57(in Chinese).[3] 蒋励, 刘荣, 王大伦, 等. 用贫化铀裂变室测量绝对裂变率的影响因素研究[J]. 核电子学与探测技术, 2003, 23(5): 468-470.
JIANG Li, LIU Rong, WANG Dalun, et al. Study on the effect factor of the absolute fission rates measured by depleted uranium fission chamber[J]. Nuclear Electronics & Detection Technology, 2003, 23(5): 468-470(in Chinese).[4] 朱通华, 刘荣, 蒋励, 等. D-D聚变中子源产额的大角度伴随质子监测技术研究[J]. 核电子学与探测技术, 2007, 27(1):141-144.
ZHU Tonghua, LIU Rong, JIANG Li, et al. The associated proton monitoring technique study of D-D source neutron yields at the large angle[J]. Nuclear Electronics & Detection Technology, 2007, 27(1): 141-144(in Chinese). -
期刊类型引用(1)
1. 黎磊磊,刘茂龙,倪嵩,王小文,刘利民,顾汉洋. 湿空气在全尺寸压水堆燃料组件中的自然循环特性试验及理论研究. 核技术. 2024(08): 159-168 . 百度学术
其他类型引用(3)
计量
- 文章访问数: 1668
- HTML全文浏览量: 0
- PDF下载量: 1571
- 被引次数: 4