Mitsubishi Heavy Industries Technical Review
    Vol. 57 No. 4 (2020)   Nuclear Power
    Technical Papers

    Development of Emergency Gas Turbine Generator Unit with High Earthquake Resistance for Nuclear Power Plants


    The new nuclear regulations established after the nuclear accidents caused by the Great East Japan Earthquake required that additional power sources featuring diversity and independency (locational separation) be installed with the existing emergency power sources for nuclear power plants. To meet this requirement, Mitsubishi Heavy Industries Ltd. (MHI) started the development of the world's first gas turbine generator unit with high earthquake resistance for nuclear power plants, the MEG-6000, which is an emergency generator unit with principle and cooling means that differ from those of existing emergency power sources. We conducted verification and demonstration of the basic specifications, earthquake resistance, reliability, etc., of this unit and completed it, which is the system designed so that the main equipment is contained in the package, as an emergency generator unit. The unit was approved by the Nuclear Regulation Authority and the site installation work and test operation were both accomplished. We plan to install about 20 gas turbine generator units, almost all of which have already been manufactured. The MEG-6000 unit has been steadily establishing a track record as an emergency gas turbine generator unit with high earthquake resistance for nuclear power plants.