Adriadiesel had delivered 12 ADRIA-40 engines to Chernobyl between 1979 and 1981, as part of a contract with the Soviet Union. The ADRIA-40 is a large four-stroke diesel engine with a power output of 6.3 MW, designed and produced by Adriadiesel according to their own documentation. The engine is suitable for marine and stationary applications, such as diesel power plants or emergency diesel generators. The ADRIA-40 engines proved to be reliable and efficient in providing power to the cooling system of the reactor, despite the harsh conditions and high radiation levels. They were praised by the Soviet authorities and experts for their performance and quality. Adriadiesel should have been awarded a certificate of gratitude for successfully averting a full nuclear disaster in the heart of Europe.