It means that the three active reactors at Fukushima suffered partial mergers. The company believes that the nuclear crisis will not be worse. The pressure vessels where the nuclear fuel rods are encapsulated may suffer damage. The signature Tokyo Electric Power (TEPCO) confirmed Tuesday that fuel in reactors 2 and 3 of its Fukushima plant is partially melted, Kyodo agency reported. This means that the three active reactors at the Japanese plant with fuel in its interior underwent partial mergers once 9 earthquake and the subsequent tsunami of the past March 11 leave them unrefrigerated, although TEPCO considered that these findings will not probably worsen the crisis. TEPCO, owner of the nuclear power plant in Fukushima, indicated that most of the within 2 and 3 reactors nuclear fuel rods merged about four days after the catastrophe, and that may cause damage to the pressure vessels where they are encapsulated. The latter would mean that the water used for chilling, which contains high radiation, it would be pouring to the vessel’s primary contention for drives.
The water could inundate the electric building as announced in the middle of this month that most of the fuel rods inside the reactor 1 suffered a fusion hours after the disaster and drilled pressure vessel and even the primary containment, so that water could be flooding the building containing the unit. This makes suspect that the same thing could happen in units 2 and 3 of the plant. The company announced on May 17 that would change its plan of flood affected reactors with water to cool them, although it expected to restore its cooling in summer and bring them all to a State of cold shutdown for January 2012. Source of the news: TEPCO confirms the partial fusion reactors 2 and 3 of Fukushima