<sup>252</sup>Cf源驱动噪声分析核材料富集度判别方法

杨帆; 魏彪; 米德伶; 任勇; 周密

²⁵²Cf源驱动噪声分析核材料富集度判别方法

1.
重庆大学光电技术及系统教育部重点实验室, 重庆 400044

基金项目:

面向核军控核查的主动式多通道随机中子脉冲实时频谱分析应用基础研究

详细信息

通讯作者:
杨帆

计量
- 文章访问数: 1766
- HTML全文浏览量: 181
- PDF下载量: 330
- 被引次数: 0
出版历程
- 收稿日期: 2012-02-27
- 刊出日期: 2012-05-15

Nuclear material enrichment estimation based on ²⁵²Cf source-driven noise analysis

1.
Key Laboratory of Optoelectronics Technology and Systems,Ministry of Education,Chongqing University,Chongqing 400044,China

摘要

摘要: 针对探测器通道和待测核材料探测通道之间相对几何位置与待测核材料富集度变化之间的相互关系问题，开展了基于探测通道间协方差幅值进行核材料富集度判别的研究工作。实验中，选取富集度分别为85.15%，90.15%和93.15%的235U核材料，模拟研究了多个位置不同的探测通道所得到的协方差运算结果。研究结果表明:随着235U核材料富集度的增加，互相关的幅值也随之增大并与国外文献结果相吻合，率先在国内证明了基于探测器相对几何位置变化的探测通道互相关幅值可以推断核材料富集度的可行性。
- 源驱动噪声分析法 /
- 核材料 /
- 富集度 /
- 协方差
Abstract: The paper investigates the relationship between the change of nuclear sample enrichment and the relative position of detectors of the 252Cf source-driven noise analysis system. A Monte Carlo numerical simulation with varied 235U enrichment (85.15%, 90.15%, 93.15%) and different relative positions has been conducted, and the cross-covariance between data of paired detectors was calculated. The results show that the amplitude of cross-covariance improves with 235U enrichment, which coincides with reference results. Thus it is feasible to estimate the nuclear material enrichment based on the cross-covariance amplitude of detectors.
- source-driven noise analysis /
- nuclear material /
- enrichment /
- covariance

HTML全文

参考文献(1)

[1] Valentine T E. Review of subcritical source-driven noise analysis measurements [R]. ORNL/TM-199/288, 1999.
[2] Mattingly J K, March-Leuba J A, Mihalczo J T, et al Passive NWIS measurements to estimate shape of plutonium assemblies[R]. LB-15. 988, No.25, 1998.
[3] 任勇,米德伶,魏彪,等. ²⁵²Cf裂变中子信号功率谱密度分析系统[J]. 核动力工程, 2010, 31(2): 140-144. (Ren Yong, Mi Deling, Wei Biao, et al. Power spectrum density analysis system of ²⁵²Cf neutron signals. Nuclear Power Engineering, 2010, 31(2): 140-144.)
[4] 魏彪,任勇,冯鹏,等. 基于²⁵²Cf裂变中子源的核信息系统频谱分析[J]. 强激光与粒子束, 2009, 21(12): 1898-1902. (Wei Biao, Ren Yong, Feng Peng, et al. Spectrum analysis of nuclear information system based on ²⁵²Cf fission neutron source. High Power Laser and Particle Beams), 2009, 21(12):1898-1902.
[5] 任勇,魏彪,李建胜,等. ²⁵²Cf源驱动功率谱密度法测量系统[J]. 强激光与粒子束, 2012, 24(1): 215-219. (Ren Yong, Wei Biao, Li Jiansheng, et al. Implementation of ²⁵²Cf-source-driven power spectrum density measurement system. High Power Laser and Particle Beams, 2012, 24(1): 215-219.)
[6] Mihalczo J T, Mullens J A, Mattingly J K, et al. Physical description of nuclear materials identification system (NMIS) signatures [J]. Nuclear Instruments and Methods, 2000, 450(2): 531-555.
[7] Enqvist A, Flaska M, Pozzi S. Measurement and simulation of neutron/gamma-ray cross-correlation functions from spontaneous fission [J]. Nuclear Instruments and Methods, 2008, 595(2): 426-430.

施引文献

资源附件(0)

访问统计