Most of the world's biggest nuclear power plants by net capacity are in East Asia. Regular inspection and safety measures have been stepped up at the large capacity nuclear power stations following the Fukushima nuclear disaster in 2011.he Paluel Nuclear Power Plant, located about 40km away from the city of Diepp, France, is currently the seventh largest NPP in the world, by net capacity. The plant is spread across 160ha on the water front of the English Channel and uses water from the Channel for the cooling.