Analysis of information sources in references of the Wikipedia article "Tokaimura nuclear accidents" in English language version.
The Management System or the system required to assure not only the quality of the product but also to assure the safety as a part of "satisfaction of interested parties", had not taken root in JCO. The licensed design of the nuclear fuel process had been continuously revised in an unauthorized manner, and finally made vulnerable to the occurrence of a criticality event. Not only the three workers, who triggered the accident, but also the manager who allowed the last modification of the process lacked practical understanding of criticality safety.
