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NRA rebuts claim that Fukushima cleanup affected faraway rice paddies via The Asahi Shimbun

Japan’s nuclear watchdog disputed the farm ministry’s assertion that radioactive substances churned up by debris removal work at the Fukushima No. 1 nuclear power plant contaminated distant rice paddies last year.

The Nuclear Regulation Authority announced at a commissioners’ meeting Oct. 31 its estimate that 110 billion becquerels of radioactive materials spread as a result of cleanup at the No. 3 reactor building on Aug. 19, 2013.

This figure is lower than the 130 billion to 260 billion becquerels estimated by the plant’s operator, Tokyo Electric Power Co., in August.

Radiation readings rose significantly during debris removal that day, with radioactive substances found to have contaminated plant workers about 500 meters from the reactor building.

However, NRA Commissioner Toyoshi Fuketa emphasized, “The affected area of the fallout was within the nuclear plant compound.”

[…]

Earlier, the farm ministry pointed to the possibility that radiation from the plant had spread to rice paddies in Minami-Soma more than 20 kilometers away, and called on TEPCO to take preventive measures in its debris removal work.

During the NRA meeting, some experts noted that despite the NRA’s estimate, it is unlikely that factors other than debris cleanup at the plant could have caused such high levels of radioactive fallout at the rice farms.

“From a broader perspective, the Fukushima No. 1 plant is responsible for the contamination,” one participant said.

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