Fukushima Nuclear plant damage day by day

It is the first time for Japan to inform UN about the nuclear watchdog that fuel in its crippled Fukushima Plant may have melted through the bottom of three factor core vessels. Japan's Nuclear and Industrial Safety Agency (NISA) now says it believes 770,000 terabecquerels escaped into the atmosphere in the first six days compared to its earlier estimate of 370,000 terabecquerels.

Almost three months after the March ruin, Japan is preparing a report to be submitted this month to the UN International Atomic Energy Agency (IAEA), which sent its own multinational fact-finding team to Japan recently.Japan's government plans to tell the IAEA that fuel is assumed to have melted down and through the reactor pressure vessels of units one, two and three and into their outer steel containment vessels, said the Yomiuri.

Yomiuri said that Tokyo will also pledge to thoroughly reform its nuclear safety systems, including by separating the watchdog NISA from the ministry of economy, trade and industry, which promotes nuclear power.