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开展了钍样品装置内钍核参数的积分中子学基础研究. 参考混合堆概念设计搭建了内部放置了钍样品的一维贫铀/聚乙烯交替系统装置，采用加速器D-T中子源模拟聚变堆芯，利用前期开发的离线伽马测量方法测定了不同位置、不同中子谱情况下的232Th （n，γ）反应率，不确定度约为5%. 结果显示，聚乙烯对14.1 MeV中子的慢化作用可有效提升钍俘获率，且贫铀对钍俘获率也有显著提升作用. 实验结果与主流核数据库计算结果的对比显示，ENDF/B-VI.6和JENDL-3.3数据库的计算值比实验值平均约大6%，而较新的ENDF/B-VII.0数据库的计算值比实验值平均约大4%. 因此，相比于之前数据库的钍核数据，ENDF/B-VII.0的计算值与实验结果匹配得较好，可作为相关概念设计的推荐核数据库.A series of neutron integral fundamental researches of thorium nuclear data in set-ups containing thorium samples is carried out. One-dimensional alternate depleted uranium/polyethylene shells containing thorium samples are constructed by referring to the conceptual design of fusion-fission hybrid reactor, where a D-T neutron source driven by accelerator is used to simulate the fusion core of the reactor. 232Th (n, γ ) reaction rates in samples located at different positions in the shells are measured in 5% uncertainty by using activated thorium sample decay γ-ray off-line measurement technique. The results show that the moderation of polyethylene to 14.1 MeV neutron will efficiently increase the capture rate of thorium, and the depleted uranium is also conducible to this increase obviously. The comparison between our measured data and the results available from mainstream nuclear data bank shows that the calculation results from ENDF/B-VI.6 and JENDL-3.3 are around 6% higher than the experimental results, while the newer ENDF/B-VII.0 will achieve better results, around 4% higher than the experimental results. We recommend the ENDF/B-VII.0 to be used in one-dimensional alternate depleted uranium/polyethylene shells related conceptual design when calculating the 232Th (n, γ) reaction rate.
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Keywords:
- thorium /
- capture rate /
- D-T neutron /
- depleted uranium
[1] Schillebeeckx P, Trkov A 2006 Summary Report of the 3rd Research Coordination Meeting (Vienna: International Atomic Energy Agency) pp7-27
[2] Yan X S 2012 M. S. Thesis (Beijing: China Academy of Engineering Physics) (in Chinese) [严小松 2012 硕士学位论文 (北京: 中国工程物理研究院)]
[3] Yapici H, Sahin N, Bayrak M 2000 Energ Convers. Manage 41 435
[4] Zhao J, Yang Y W, Zhou Z W 2012 Fusion Eng. Des. 87 1385
[5] Simakov S P, Kobozev M G, Lychagin A A, Talalaev V A, Chuvilin D Y, Maslov V M 2007 International Conference on Nuclear Data for Science and Technology (Nice: EDP Sciences) p222
[6] Naik H, Prajapati P M, Suryanarayana S V, Pathak P N, Prabhu D R, Chavan V, Raj D, Kalsi P C, Goswami A, Ganesan S, Manchanda V K 2011 Eur. Phys. J. A 47 100
[7] Yang Y W, Liu R, Yan X S 2013 Acta Phys. Sin. 62 032801 (in Chinese) [羊奕伟, 刘荣, 严小松 2013 62 032801]
[8] Zhu T H, Liu R, Jiang L, Lu X X, Wen Z W, Wang M, Lin J F 2007 Nucl. Electron. Dect. Technol. 27 141 (in Chinese) [朱通华, 刘荣, 蒋励, 鹿心鑫, 温中伟, 王梅, 林菊芳 2007 核电子学与探测技术 27 141]
[9] Drosg M 2000 DROSG-2000: Neutron Source Reactions (Vienna: IAEA Nuclear Data Services)
[10] Yang Y W, Yan X S, Liu R Lu X X, Jiang L, Wang M, Lin J F 2013 Acta Phys. Sin. 62 022801 (in Chinese) [羊奕伟, 严小松, 刘荣, 鹿心鑫, 蒋励, 王玫, 林菊芳 2013 62 022801]
[11] Yang Y W, Yan X S, Liu R, Lu X X, Jiang L, Lin J F 2012 Fusion Eng. Des 87 1679
[12] Yan X S, Liu R, Lu X X, Jiang L, Wang M, Lin J F 2012 Acta Phys. Sin. 61 102801 (in Chinese) [严小松, 刘荣, 鹿心鑫, 蒋励, 王玫, 林菊芳 2012 61 102801]
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[1] Schillebeeckx P, Trkov A 2006 Summary Report of the 3rd Research Coordination Meeting (Vienna: International Atomic Energy Agency) pp7-27
[2] Yan X S 2012 M. S. Thesis (Beijing: China Academy of Engineering Physics) (in Chinese) [严小松 2012 硕士学位论文 (北京: 中国工程物理研究院)]
[3] Yapici H, Sahin N, Bayrak M 2000 Energ Convers. Manage 41 435
[4] Zhao J, Yang Y W, Zhou Z W 2012 Fusion Eng. Des. 87 1385
[5] Simakov S P, Kobozev M G, Lychagin A A, Talalaev V A, Chuvilin D Y, Maslov V M 2007 International Conference on Nuclear Data for Science and Technology (Nice: EDP Sciences) p222
[6] Naik H, Prajapati P M, Suryanarayana S V, Pathak P N, Prabhu D R, Chavan V, Raj D, Kalsi P C, Goswami A, Ganesan S, Manchanda V K 2011 Eur. Phys. J. A 47 100
[7] Yang Y W, Liu R, Yan X S 2013 Acta Phys. Sin. 62 032801 (in Chinese) [羊奕伟, 刘荣, 严小松 2013 62 032801]
[8] Zhu T H, Liu R, Jiang L, Lu X X, Wen Z W, Wang M, Lin J F 2007 Nucl. Electron. Dect. Technol. 27 141 (in Chinese) [朱通华, 刘荣, 蒋励, 鹿心鑫, 温中伟, 王梅, 林菊芳 2007 核电子学与探测技术 27 141]
[9] Drosg M 2000 DROSG-2000: Neutron Source Reactions (Vienna: IAEA Nuclear Data Services)
[10] Yang Y W, Yan X S, Liu R Lu X X, Jiang L, Wang M, Lin J F 2013 Acta Phys. Sin. 62 022801 (in Chinese) [羊奕伟, 严小松, 刘荣, 鹿心鑫, 蒋励, 王玫, 林菊芳 2013 62 022801]
[11] Yang Y W, Yan X S, Liu R, Lu X X, Jiang L, Lin J F 2012 Fusion Eng. Des 87 1679
[12] Yan X S, Liu R, Lu X X, Jiang L, Wang M, Lin J F 2012 Acta Phys. Sin. 61 102801 (in Chinese) [严小松, 刘荣, 鹿心鑫, 蒋励, 王玫, 林菊芳 2012 61 102801]
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