The overall cost of wrapping up the Fukushima nuclear disaster is now estimated at more than ¥20 trillion, nearly double the previous estimate, sources familiar with the matter said Monday.

The Ministry of Economy, Trade and Industry, which previously put the overall cost at ¥11 trillion, is considering passing on a portion of the costs, including for compensation and the decommissioning of the Fukushima No. 1 nuclear plant, to consumers via higher electricity prices, the sources said.

The aged, six-reactor plant, operated by Tokyo Electric Power Co. Holdings Inc., was plunged into a blackout by the March 2011 earthquake and subsequent tsunami, leading to three core meltdowns and the worst nuclear disaster since Chernobyl in 1986.