Mihama Nuclear Power Plant | Operational Facility in Japan

Mihama is a nuclear power plant located in Japan, owned and operated by Kansai Electric Power. The facility is currently operational and plays a key role in the region's energy supply. With a capacity of 826 MW, it is a medium-scale nuclear plant within Japan's nuclear fleet. Nuclear power plants in Japan operate under strict regulatory oversight by the Nuclear Regulation Authority (NRA), following the 2012 regulatory standards established after the Fukushima Daiichi incident. Mihama, like other Japanese nuclear plants, must comply with rigorous safety assessments, including seismic and tsunami countermeasures. The plant uses light water reactor technology, typical for commercial nuclear generation in Japan. Mihama provides low-carbon baseload electricity to the Kansai region, supporting grid stability and reducing reliance on fossil fuels. Its operation is significant for Japan's energy mix, as the country balances nuclear restart efforts with renewable energy expansion. The plant's coastal location facilitates cooling water access, a standard requirement for nuclear facilities.

As a nuclear plant, Mihama produces no direct CO2, SOx, or NOx emissions during operation, contributing to local air quality benefits. However, the facility's coastal location and proximity to populated areas necessitate robust safety and emergency planning. The plant's age and technology (light water reactor) are typical for Japanese nuclear plants, with ongoing upgrades to meet post-Fukushima safety standards. Radioactive waste management and cooling water thermal discharge are key environmental considerations.