中子学积分实验

从６０年代开始,我所就开展了聚变中子积分实验,完成了造氚率、裂变率、穿透率及泄漏中子能谱测量等研究课题．１９８７年以来承担了“８６３”计划的聚变裂变混合堆包层中子学积分实验,开展了Ｂｅ、Ｐｂ的１４ＭｅＶ中子倍增率实验,其中Ｂｅ实验为中、美、日国际合作,实验误差为２．８％,实验结果为理论计算提供积分检验．新的一轮中、美、俄的更大厚度的Ｂｅ中子倍增率实验国际合作正在进行之中．现在,中美关于核聚变合作已经确定了１７个项目,我所承担了其中的“关于ＩＴＥＲ和建议的聚变堆包层及屏蔽系统的中子学积分实验”这一项目． Since 1960s, the fusion neutronics integral experiments have been carried outin our institute. Several research subjects, including the measurements of the tritium production rate,the fission rate,the leakage rate and the neutron energy spectra, have been finished. Since 1987,neutronics integral experiments of the blanket in the fusion-fission hybridreactor in the "863" project have been taken on. The experiments of 14MeV neutron multiplication in Be and Pb have been performed and the experimental error is ...     

中子源有源法核查技术研究

用有源 (主动 )方法研究了贫化铀组合系统的中子诱发裂变缓发中子探测技术 .在不同屏蔽和组合等条件下测量和比较了贫化铀系统的缓发裂变中子分布 ,进一步研究了实验系统的可核查性 .探讨了区分核与非核系统的方法. The technique for detecting the delayed neutrons from neutron induced fission in uranium systems was studied by using an active method with 3He proportional counting tube array and a 14 MeV D T neutron source. Under the conditions of different shielding and combination, the distributions of delayed fission neutrons from depleted uranium systems were measured and the reliability of the systems was studied. The method to distinguish a nuclear system from a non nuclear one was discussed.