Interim measures
• We changed the procedure and performed education for all operators (workers) as they shall operate observing that 1. At the open & close operation for lid, assistants should retreat to a safe location visible from the operator, 2.Operator should check the assistant location “visually” then perform a pointing and calling confirmation as "Retreat, OK".
• We performed reeducation of basic rules for getting into any movable objects including mechanical lock installation and display of operation prohibition.