In recent years, occurrence of the accidents in the general waste disposal facilities is reported from many fields. Then, we surveyed the bulky waste disposal facilities, and made the accidents and troubles data base to prevent the accidents. We developed the SAD (Safety design Analysis with Database) built in accidents and troubles data base to find the potential risk from the design phase of the facilities. Moreover, we upgraded it so that calculating the risk from the damage situation by deciding the default value concerning the amount of damage referring to insurance might become possible. We assessed the safety of the Domestic Wastes Treatment Facilities with SAD (Safety design Analysis with Database). As a result, the explosion in the ripper generated by the combustible gas such as the gas spray cans mixing is the most risky.
