Measurement of leakage neutron spectra for zirconium with D-T neutrons and validation of evaluated nuclear data
Measurement of leakage neutron spectra for zirconium with D-T neutrons and validation of evaluated nuclear data
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用 D-T 中子测量锆的泄漏中子能谱并验证评估的核数据
DOI：
10.1016/j.fusengdes.2019.111311
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发表时间：
2019-12
影响因子：
1.7
通讯作者：
Q. Sun
中科院分区：
文献类型：
--
作者：
S. Zhang;N. Song;J.C. Wang;Y. Nie;X. Ruan;J. Ren;D.X. Wang;M. Huang;L. Lu;Z. Chen;Y. Ding;K. Zhang;H. Chen;R. Wada;R. Han;Q. Sun
积分中子学实验已成为检验评价核数据可靠性的有力工具和方法。本文通过实测漏中子能谱与计算能谱的比较，验证了锆核评价数据的准确性。用飞行时间法测量了60°和120°角下D-T中子辐照锆样品的漏中子能谱。用蒙特卡罗中子输运程序MCNP-4C对ENDF/B-VII.0、ENDF/B-VIII.0、JENDL-4.0和CENDL-3.1库的核数据进行了理论计算。结果表明，在60°角下，JENDL-4.0的计算结果与实验结果符合较好，而在120°角下，在4- 13.5MeV能量范围内，计算结果与实验结果有较大的偏差。然而，使用ENDF/B-VII.0、ENDF/B-VIII.0和CENDL-3.1库的数据计算的能谱与实测值存在一定的差异，特别是弹性和非弹性角分布以及连续非弹性散射中次级中子能量分布的差异。
Integral neutronics experiments have been the powerful tool and method for examining the reliability of the evaluated nuclear data. In present paper, the accuracy of evaluated nuclear data for zirconium has been validated by comparing measured leakage neutron spectra with calculated ones. Leakage neutron spectra from the irradiation of D-T neutrons on zirconium samples were experimentally measured at 60° and 120° by using a time-of-flight method. Theoretical calculations are carried out by the Monte Carlo neutron transport code MCNP-4C with the evaluated nuclear data of the ENDF/B-VII.0, ENDF/B-VIII.0, JENDL-4.0 and CENDL-3.1 libraries. From the comparisons, it is found that the calculations with JENDL-4.0 gives better agreements with the experiments at 60° while a large discrepancies are observed in the 4–13.5 MeV energy range at 120°. However, the calculated spectra using the data from ENDF/B-VII.0, ENDF/B-VIII.0 and CENDL-3.1 libraries showed some discrepancies with the measured ones, especially caused by the difference of the elastic and inelastic angular distributions and the secondary neutron energy distributions in the continuum inelastic scattering.
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