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Estimation of particulate and dissolved 137Cs discharge from rivers to the ocean near the Fukushima Dai-ichi Nuclear Power Plant using a simple model




Kazuyuki Sakuma
Sector of Fukushima Research and Development, Japan Atomic Energy Agency (JAEA)


  1. Ken Buesseler on March 8, 2021 at 3:22 pm

    Your fluxes of Cs to the ocean from both rivers and the FDNPP drop considerably in 2018 and 2019 relative to 2012-2017. What is the reason? I assume these values are per year? in which case the values 0.2-0.8 TBq/yr are similar to values of Cs input calculated from groundwater input associated with the beaches (Sanial et al., PNAS 2017).

    • Kazuyuki Sakuma on March 9, 2021 at 8:11 pm

      Thank you very much for your comment. Fluxes of Cs to the ocean during 2012-2017 means total amount of discharge. I think I would like to compare the Cs fluxes from the river, 1F, and groundwater in the future.