【摘要】 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,对Nd、Ru的去污因子为1×103,对Zr、Nb的去污因子约为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(>6 MeV)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(>6 MeV)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%.The decontamination factors of Np,Ce,Ba,La are more than 1×104,those of Nd,Ru are 1×103 and those of Zr and Nb are 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)239U.Finally,the ratios of high energy neutron in the miniature and pulse nuclear reactor were obtained.更多还原