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» 2.53 billion becquerels of cesium found from a trench in Fukushima No.1 plant

Tokyo Electric Power Co. said on July 27th that it has detected 2.35 billion becquerels of cesium per liter from water in a service tunnel primarily used for pipes and electric cables at Fukushima No.1 nuclear plant.

TEPCO believes the water is the source of contaminated water leaking TEPCO recently admitted.

According to TEPCO, about 750 million becquerels per liter is cesium-134, which has a half-life of about two years, while cesium-137 — with a half-life of roughly 30 years — makes up 1.6 billion becquerels per liter of the contamination. Another 750 million becquerels is thought to be strontium and other radioactive elements that emit beta radiation.

TEPCO believes that the radioactive water likely flowed into the pit during the initial stages of March 2011 reactor meltdowns because those concentration levels are almost the same as measurements taken during the early phases of the disaster.

<Media Report>
Waterborne radioactive levels in Fukushima plant pit unchanged from 2011 (Asahi Newspaper)

Massive radioactive contamination found in water at Fukushima plant(Mainichi Newspaper)

Radiation in water leakage at Fukushima plant as high as 2011 crisis(Kyodo News)

 


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