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A detailed map was published by the Ministry of Education, Culture, Sports, Science and Technology, going online on 18 October 2011. The map contains the caesium concentrations and radiation levels caused by the airborne radioactivity from the Fukushima nuclear reactor.
Officials suggested that the Reactor 3 building was the most likely source, and said that its containment systems may have been breached. [31] The control room for Reactors 3 and 4 was evacuated at 10:45 JST but staff were cleared to return and resume water injection into the reactor at 11:30 JST. [ 32 ]
Containment systems for nuclear power reactors are distinguished by size, shape, materials used, and suppression systems. The kind of containment used is determined by the type of reactor, generation of the reactor, and the specific plant needs. Suppression systems are critical to safety analysis and greatly affect the size of containment.
The Fukushima Daiichi plant is connected to the power grid by four lines, the 500 kV Futaba Line (双葉線), the two 275 kV Ōkuma Lines (大熊線) and the 66 kV Yonomori Line (夜の森線) to the Shin-Fukushima (New Fukushima) substation. The Shin-Fukushima substation also connects to the Fukushima Daini plant by the Tomioka Line (富岡線).
The operator of Japan's destroyed Fukushima Daiichi nuclear power plant demonstrated Tuesday how a remote-controlled robot would retrieve tiny bits of melted fuel debris from one of three damaged ...
A drone small enough to fit in one's hand flew inside one of the damaged reactors at the wrecked Fukushima Daiichi nuclear power plant Wednesday in hopes it can examine some of the molten fuel ...
About 880 tons of highly radioactive melted nuclear fuel remain inside the three damaged reactors. Critics say the 30- to 40-year cleanup target set by the government and TEPCO for Fukushima Daiichi is overly optimistic. The damage in each reactor is different, and plans must accommodate their conditions.
Temperatures in the containment vessels were 38.9 degrees Celsius for reactor one, 67.5 degrees for reactor two, and 57.4 degrees for reactor 3. [268] This announcement failed to lay to rest substantial concerns arising from TEPCO's inability to directly measure temperatures at the bottoms of the containment vessels, and the fact that the site ...