Fire by Sodium Coolant Leak at Prototype Fast Breeder Reactor 1 1. This accident is not related to nuclear reaction at all 3. Unpreparedness to the accident 4. Delay of shutdown and not-stopping air supply 5. One sometimes acts stupidly.
Technological judgment is essential in accident.
Explosion at Demonstration Nuclear Fuel Recycling Facility 2 1. No human injury 3. Explosion after inadequate actions on the drums 4. Reporting inaccurate information and forcing workers to tell a lie 5. Easy going from no accident and safe operation for long time Similar accidents in Belgium plant etc.