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» More than 1 trillion becquerels of radioactivity were released into air during debris-cleaning last summer

More than 1 trillion becquerels of radioactive substances were released into the environment during debris-clearing work at the Fukushima No. 1 nuclear power plant last year, according to estimates by TEPCO.

Although TEPCO’s stricken facility is estimated to currently emit about 10 million becquerels per hour, the utility said that cleanup efforts at the plant’s No. 3 reactor on Aug. 19, 2013, resulted in the release of a maximum 1.1 trillion becquerels of radioactive materials over a period of four hours.

The estimates were made by monitoring results in downwind areas and also took into account that alarms for highly contaminated dust concentrations sounded for four hours.

The precise amount of radioactive substances that leaked out of the plant site remains unclear, TEPCO officials said.
<Media Report>
1.1 trillion becquerels of radioactivity leak during Fukushima cleanup (Asahi Newspaper)

Cleanup sent 1 trillion becquerels of cesium into atmosphere last summer: Tepco (Japan Times)

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