Japan Times, Feb. 11, 2014: Tepco hid record-level radiation data last July — [Tepco] did not tell the public until recently that massively high levels of radiation were found in groundwater collected last July at the Fukushima No. 1 nuclear plant, even though the utility was aware of the data that month, according to sources. [...] When Tepco reported the data to the Nuclear Regulation Authority last week, it initially claimed that it had only recently compiled the data, NRA sources said. However, the embattled utility later corrected the timing, apparently showing that it had withheld the record readings, the sources said. [...] The withholding of the radiation data looks to be the latest in a long line of missteps for the utility, experts said. [...] Tepco concluded at the time that the data were inaccurate, citing the huge difference in the two measurements, despite knowing that its method of measuring beta ray-emitting materials could show lower-than-actual levels, the sources said. [...] the utility has repeatedly changed its explanations [...]
Reuters, Feb. 12, 2014: [...] Almost three years since the reactor meltdowns at the Fukushima Daiichi station [Tepco] still lacks basic understanding of measuring and handling radiation, Nuclear Regulation Authority (NRA) Chairman Shunichi Tanaka said on Wednesday. The utility has been widely criticised for an inept response to the March 2011 disaster. [...] Tepco said there was a calibration mistake with one machine measuring strontium levels of well water at the plant, and it had also found an error with devices that decipher all-beta radiation. [...]
Shunichi Tanaka, chairman of Japan’s Nuclear Regulation Authority: “Something like this cannot happen … This is what becomes the basis of various decisions, so they must do their utmost to avoid mistakes in measuring radiation.”
See also: Kyodo: 'Massive' amount of Fukushima data wrong? "Figures can't be trusted" -- NHK: Strontium-90 by ocean at 160,000 times limit -- Tepco: Actual levels "exceeded the upper limit of measurement... We are very sorry"
Published: February 12th, 2014 at 9:36 pm ET