[en] The Power Reactor and Nuclear Fuel Development Corporation (PNC) is a semi-governmental organization responsible for the development of advanced power reactors and nuclear fuels in Japan. The Tokai Works is the PNC center for research and development of nuclear fuels concerned with plutonium fuels fabrication, fuel reprocessing, and centrifugal uranium enrichment. Accomplishments in the activities of Tokai Works during the latter half of 1975 are summarized as follows: (1) Plutonium fuels development--Fabrication of core fuel assemblies is being continued for initial loading of the Experimental Fast Breeder Reactor JOYO and remodeling is being carried out on the facility for fabrication of plutonium fuels for the Prototype Heavy Water Moderated and Boiling Light Water Cooled Reactor FUGEN; (2) Fuel reprocessing--Construction of the Tokai Reprocessing Plant is nearly completed and preparation for its commissioning is being made; (3) Development of centrifugal uranium enrichment is being performed successfully