【作者】 毛国淑； 张生栋； 丁有钱； 赵雅平； 梁小虎； 杨磊； 孙宏清；

【Author】 MAO Guo-shu,ZHANG Sheng-dong,DING You-qian,ZHAO Ya-ping, LIANG Xiao-hu,YANG Lei,SUN Hong-qing (China Institute of Atomic Energy,P.O.Box 275(126),Beijing 102413,China)

【机构】 中国原子能科学研究院放射化学研究所；

【摘要】 本文开展了铀、镎及裂变产物在阴离子交换树脂和TBP萃淋树脂上的吸附行为研究,建立了大量铀中微量镎的去除方法。该流程铀的化学收率约90%;对Np、Ce、Ba、La的去污因子大于1×10⁴,Nd、Ru的去污因子为1×10³,对Zr、Nb去污因子约1×10²。应用该放射化学分离流程,分别利用²³⁸U（n,2n）²³⁷U反应,测量了堆中高能中子（>6MeV）的注量率;利用²³⁸U（n,γ）²³⁹U反应,测量了堆中热中子的注量率,得到了反应堆中高能中子（>6MeV）所占的份额。更多还原

【Abstract】 In this work,adsorption behaviors of uranium,neptunium and fission products on the anion resin and TBP levextrel resin were investigated,a procedure was established to remove micro neptunium from milligramme uranium.The chemical recovery of U is about 90%,decontamination factors of Np,Ce,Ba,La are more than 1×10⁴,those of Nd,Ru can be 1×10³ and those of Zr and Nb about 1×10².The flux of high energy neutron in the miniature and pulse nuclear reactor were measured by using the reaction of ²³⁸U（n,2n）²³⁷U.The flux of thermal neutron in the miniature and pulse nuclear reactor were measured by using the reaction of ²³⁸U（n,γ）²³⁹ U.Finally,the ratios of high energy neutron in the miniature and pulse nuclear reactor were obtained.更多还原