Japan's government [has said] that it could take 40 years to clean up and fully decommission [the Fukushima reactors]. Plant operator Tokyo Electric Power Co. will start removing spent fuel rods within two to three years from their pools. After that is completed, TEPCO will start removing the melted fuel, most of which is believed to have fallen to the bottom of the core or even down to the bottom of the larger, beaker-shaped containment vessel, a process that is expected to begin in 10 years and [be] completed 25 years from now. Completely decommissioning the plant would require five to 10 more years after the fuel debris removal, making the entire process up to 40 years. The process still requires the development of robots and technology that can do much of the work remotely because of extremely high radiation levels inside the reactor buildings. The operator and the government would also have to ensure a stable supply of workers and save them from exceeding exposure limits while keeping the long process going. They also have to figure out ways to access each containment vessel and assess the extent of damage, as well as locate holes and cracks through which cooling water is leaking and flooding the area. Another problem is huge volume of radioactive waste and debris that will come out of the plant during its dismantling process. Officials said they have not decided what to do with them and that part is not covered by the 40-year roadmap.