Application of a chronoamperometric measurement to the on-line monitoring of a lithium metal reduction for uranium oxide

作者：Kim Tack Jin; Cho Young Hwan; Choi In Kyu; Kang Jun Gill; Song Kyuseok^*; Jee Kwang Yong

来源：Journal of Nuclear Materials, 2008, 375(2): 275-279.

DOI：10.1016/j.jnucmat.2007.12.002

Both a potentiometric and a chronoamperometric electrochemical technique have been applied in an attempt to develop an efficient method for an on-line monitoring of a lithium metal reduction process of uranium oxides at a high-temperature in a molten salt medium. As a result of this study, it was concluded that the chronoamperometrie method provided a simple and effective way for a direct on-line monitoring measurement of a lithium metal reduction process of uranium oxides at 650 degrees C by the measuring electrical currents dependency on a variation of the reduction time for the reaction. A potentiometric method, by adopting a homemade oxide ion selective electrode made of ZrO2 stabilized by a Y2O3 doping, however, was found to be inappropriate for an on-line monitoring of the reduction reaction of uranium oxide in the presence of lithium metal due to an abnormal behavior of the adopted electrodes. The observed experimental results were discussed in detail by comparing them with previously published experimental data.

• 出版日期2008-4-15