[en] During the first phase (2012 - 2014), this project has been carrying out the evaluation and improvement of engineering scale electrolytic reduction process and the development of high capacity electrolytic reduction process unit. An engineering-scale electrolytic reduction process unit has been installed at PRIDE and electrolytic reduction tests using a blank test, salt loading and U to achieve the performance verification stage of the engineering scale has been carried out. During the second phase (2015 - 2016), we carried out PRIDE electrolytic reduction process simfuel performance tests and comprehensive evaluation, integrity evaluation and improvement of electrolytic reduction equipment, establishment of core technology of high capacity electrolytic reduction, ACPF hot cell electrolytic reduction equipment simulated fuel performance tests, and KAPF preliminary concept design of electrolytic reduction process equipments. We achieved the engineering scale integrated demonstration of electrolytic reduction process doubling the capability of the spent fuel tests. Accordingly, we have achieved the research goal of preliminary concept design of KAPF electrolytic reduction process equipment through comprehensive PRIDE / ACPF electrolytic reduction performance evaluation and core technology performance evaluation.