摘要
在核燃料后处理工艺中，由于ＴＢＰ对不同价态的铀钚离子的萃取能力有显著差异，通过氧化还原多次调节铀钚离子的价态就能实现他们对裂片产物的去污及他们之间的相互分离［１］。因此，氧化还原剂的选择是后处理过程中一个至关重要的问题。为适应我国动力堆燃料循环体系的发展及改进后处理流程，简要介绍钚电解还原工艺的特点，论述钚的电解还原原理及其在电脉冲柱中的传质过程，主要介绍电脉冲柱由隔膜式、隔离体式到完全不分阴极室及阳极室的简单的普通脉冲柱型式的发展，以确定我国电解还原脉冲筛板柱发展的基础。
In the Purex process,due to
remarkable differences of TBP's extraction ability for uranium and plutonium of variant
valences,the decontamination for fission products and separation for U and Pu can be achieved
by adjusting their valences via redox for many times.Therefore,the selection of reducing agent
for Pu is very important in the reprocessing. In order to meet the needs of developing
advanced nuclear fuel cycling system for power reactor and improving the reprocessing
process,the paper briefly introduces the characteristics of electrochemical reduction,describes
the principle of Pu electroreduction and mass transfer in electropulsed column,and in particular
discusses the development of electropulsed column from the type of cylindrical cathode/anode
screen to a conical shaped cathode/anode separators and further to normal type of pulsed
sieve plate column without the diaphragm between cathode and anode.Based on the
investigations,the background of developing the electroreduction pulsed colum can be
established in China.
出处
《核科学与工程》
CSCD
北大核心
1999年第2期152-163,共12页
Nuclear Science and Engineering
关键词
后处理
钚
电还原
脉冲筛板柱
铀/钚分离
reprocessing plutonium redox electroreduction pulsed
column U/Pu separation
