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Investor Presentaiton

Conclusions 3 The 137Cs activity at the 56N canal in 2016-2018 corresponded to 0.73-1.0 TBq year-1 of 137Cs discharged to open water from the FNPP1 site. The integrated amount of FNPP1-derived 137Cs that entered the SOJ from the North Pacific Ocean until 2017 was estimated to be 0.270 ± 0.002 PBq, whereas 0.11 ± 0.01 PBq returned to the North Pacific Ocean through the Tsugaru Strait. Decontamination efforts were estimated to have removed 0.134 PBq of 137Cs from surface soil, an amount that corresponds to 4.5 % of 137Cs deposited on land in Japan prior to February 2019.

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