Radiation management at university in Japan, (1). Treatment of Cf-252 contamination accident and suggestion to radiation management

This report gives a brief description on ²⁵²Cf contamination accident at Institute for Nuclear Study, University of Tokyo in May, 1980. The procedure of emergent decontamination and radioactivity detection is explained, together with the root cause of this accident happening. The various improvements performed to prevent the subsequent accident are summarized and several important suggestions to the radiation management revealed by this accident are discussed at the end. (author)