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No detectable impact of ALPS-treated water discharge on tritium levels in terrestrial waters of the upper Ota River catchment, Fukushima, Japan.

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Related Experiment Video

Updated: Jul 27, 2025

Finite Element Modelling of a Cellular Electric Microenvironment
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Simulation study on

Kazuyuki Sakuma1, Susumu Yamada2, Masahiko Machida2

  • 1Sector of Fukushima Research and Development, Japan Atomic Energy Agency, Fukushima 963-7700, Japan.

Marine Pollution Bulletin
|June 7, 2023
PubMed
Summary
This summary is machine-generated.

Tritium (3H) release into the Fukushima coastal region was modeled. Discharges from the Fukushima Daiichi port primarily impacted local waters, while riverine tritium effects were minimal except during storms.

Keywords:
(3)H concentrations in seawater(3)H derived from Fukushima DaiichiFukushima Daiichi Nuclear Power Plant accidentRiverine (3)H inputThree-dimensional hydrodynamic model

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Area of Science:

  • Environmental Science
  • Oceanography
  • Radiological Science

Background:

  • Planned release of tritium (3H) into the Fukushima coastal environment starting in 2023.
  • Need to assess the environmental impact of tritium discharges from both the Fukushima Daiichi port and rivers.

Purpose of the Study:

  • To evaluate the effect of tritium (3H) discharges on the Fukushima coastal region.
  • To predict tritium concentrations in seawater under different discharge and flow conditions.

Main Methods:

  • Utilized a three-dimensional hydrodynamic model (3D-Sea-SPEC) for simulations.
  • Modeled tritium discharges from the Fukushima Daiichi port and rivers in the Fukushima coastal region.

Main Results:

  • Fukushima Daiichi port discharges significantly affected tritium concentrations within approximately 1 km.
  • Riverine tritium discharge impact was limited near river mouths during base flow conditions.
  • Storm flow conditions showed a notable impact of riverine tritium on coastal waters, reaching approximately 0.1 Bq/L.

Conclusions:

  • Tritium dispersal patterns depend on the source (port vs. river) and environmental conditions (flow rates).
  • Port discharges have a localized, dominant effect, while riverine discharges pose a greater risk during high-flow events.
  • The study provides crucial data for managing tritium release and monitoring environmental safety in the Fukushima coastal region.