The Technical Report of the Research Reactor Institute, Kyoto University, is published as occasion demands, summarizing as prompt reports the date required for research and experiment, such as the results of the functional test on various experimental facilities, the results of the test on the things manufactured for trial, the state of radiation control and waste treatment, the reports of study meetings and so on, or the remarkable results and new methods obtained on the way of research, and the discussion on other papers and reports. In this report, 78 visiting research projects using the KUR and 10 visiting research projects using the KUCA in the second half of 1990 are summarized. Also 2 projects in the first half of 1990 are added. The adoption No., the kind of project, title, the names of researchers and their posts, and the gist of research are reported in each project. (K.I.).