TEPCO says the radioactivity can be reduced to safe levels and it will ensure that insufficiently filtered water is treated until it meets the legal limit. About 70% of the “ALPS-treated water,” named after the machines used to filter it, still contains Cesium and other radionuclides that exceed releasable limits. The 130 tons of contaminated water created daily is collected, treated and then stored in tanks, which now number about 1,000 and cover much of the plant’s grounds. Water used to cool the reactors’ cores leaked into the basements of the reactor buildings and mixed with rainwater and groundwater. 1, 2 and 3 to melt and spew large amounts of radiation. A magnitude 9.0 quake on March 11, 2011, triggered a massive tsunami that destroyed the plant’s power supply and cooling systems, causing reactors No.
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