Refuse Derived Fuel ("RDF" as follows.) system has been promoted as an anti-dioxin measure and one of the refuse disposal system technology to contribute to the formation of the recycling society by the utilization of the biomass energy. However, with an explosion accident in the RDF silo of August, 2003, the promotion was delayed. The Oomuta Recycle Power Station is continuing high efficiency generation by the RDF smoothly afterwards and we carried out various kinds of examinations and various scientific knowledge was accumulated about safety measures about the RDF storage. By this report, we speak the effectiveness of safety measures carrying out mainly on the inspection test result at the Oomuta Recycle Power Station.