The United States Department of Energy and the Japan Atomic Energy Research Institute (JAERI) have installed a full-scale fuel cleanup system (JFCU) at the Los Alamos Tritium Systems Test Assembly (TSTA) for testing. A component in the JFCU, the Ceramic Electrolysis Cell (CEC), was observed to have an internal leak after approximately one year of intermittent tests. This paper describes the experience of removal, decontamination and disassembly of this full-scale component.