Radionuclides from the Fukushima Daiichi Nuclear Power Plant in terrestrial systems

Onda, Yuichi; Taniguchi, Keisuke; Yoshimura, Kazuya; Kato, Hiroaki; Takahashi, Junko; Wakiyama, Yoshifumi; Coppin, Frédéric; Smith, Hugh G.

doi:10.1038/s43017-020-0099-x

Cited by 118 publications

(86 citation statements)

References 175 publications

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“…Fukushima. This discrepancy may be due to differences in the field of study, as Konoplev et al (2016) and Onda et al (2020) RF ranges were similar to those derived from the power function models reported approximately five years after the CNPP accident (Hötzl et al, 1992;Garger et al, 1997); however, the decreasing…”

Section: Accepted Manuscriptmentioning

confidence: 73%

“…This probably led to a faster decrease in radiocesium activity at the surface ground in Fukushima, resulting in a faster decrease in the activity of resuspended matter. Furthermore, Onda et al (2020) found that higher precipitation, steeper topography, and anthropogenic activities in the Fukushima area have led to a greater hydrological uptake of radiocesium, facilitating the environmental remediation at the catchment scale. Mostly, land uses relating to anthropogenic activities such as agricultural and paddy fields facilitated radiocesium wash-off.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Temporal Change in Atmospheric Radiocesium during the First Seven Years after the Fukushima Dai-ich Nuclear Power Plant Accident

Abe

Yoshimura

Sanada

2021

Aerosol Air Qual. Res.

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After the Fukushima Daiichi Nuclear Power Plant accident, atmospheric radiocesium concentration has been monitored by the Nuclear Regulation Authority as a national project to assess its temporal change from August 2011 to November 2017. During the first two years, the atmospheric radiocesium concentration ranged from 10 −1-10 0 Bq m −3 , while concentrations of 10 −5-10 −1 Bq m −3 were detected about seven years after the accident. Moreover, two years after the accident, the resuspension factor (RF) ranged from 10 −7-10 −6 m −1 and gradually decreased to 10 −11-10 −7 m −1 over time. Furthermore, to investigate the impact of anthropogenic activities on the temporal change of RF, the monitoring data were classified into two groups, namely inside and outside the Fukushima entry-restricted zone. The RF decreased faster in the second than in the first group, which was consistent with the reported data on the time dependence of the air dose rate, suggesting that anthropogenic activities promote environmental remediation and reduce atmospheric radiocesium content. Besides, the observed RF reduction in this study tends to be faster than that reported for the Chernobyl Nuclear Power Plant accident for the same period. Hence, this reduction rate should be assessed based on ongoing monitoring data in the future.

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Section: Accepted Manuscriptmentioning

confidence: 73%

Section: Accepted Manuscriptmentioning

confidence: 99%

Temporal Change in Atmospheric Radiocesium during the First Seven Years after the Fukushima Dai-ich Nuclear Power Plant Accident

Abe

Yoshimura

Sanada

2021

Aerosol Air Qual. Res.

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“…Data on radiocesium concentrations and fluxes collected in rivers within 80 km of the FDNPP from June 2011 (three months after the accident) to March 2017 (6 years after the accident) is available on the web pages 10 , 25 – 29 . The data is expected to be widely used for validation of the radiocesium transport model, comparison between the FDNPP and CNPP accidents, influence on the health of residents, and evaluation of the effect of the environmental remediation measures in Fukushima 30 . Additional data for Cs concentrations in size-fractionated sediments and information on size fractionation as a function of flow rate could be useful for further improving numerical models to predict future impacts.…”

Section: Background and Summarymentioning

confidence: 99%

Dataset on the 6-year radiocesium transport in rivers near Fukushima Daiichi nuclear power plant

et al. 2020

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Radiocesium released from the Fukushima Daiichi nuclear power plant (FDNPP) and deposited in the terrestrial environment has been transported to the sea through rivers. To study the long-term effect of riverine transport on the remediation process near the FDNPP, a monitoring project was initiated by the University of Tsukuba. It was commissioned by the Ministry of Education, Culture, Sports, Science, and Technology, and the Nuclear Regulatory Commission in June 2011, and was taken over by the Fukushima Prefectural Centre for Environmental Creation from April 2015. The activity concentration and monthly flux of radiocesium in a suspended form were measured in the project. This provides valuable measurement data to evaluate the impact of the accidentally released radiocesium on residents and the marine environment. It can also be used as verification data in the development and testing of numerical models to predict future impacts.

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“…The accident that occurred in March 2011 at the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) released large quantities of radionuclides into the environment (Leelossy et al, 2011). Among the radioactive substances emitted, two radiocesium isotopes ( 134 Cs and 137 Cs) are the most problematic over the medium to long term, as they were released in abundant quantities (Shozugawa et al, 2012). Furthermore, they are characterized by relatively long half-lives (2 years for 134 Cs and 30 years for https://doi.org/10.5194/essd-2021-74 137 Cs), which may cause their persistence in the environment (Evrard et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…However, these substances have also been found in coarser particle fractions including sandsized material (Tanaka et al, 2014). As the soils located in the main radioactive pollution plume are drained by several coastal river systems to the Pacific Ocean, the redistribution of the initial contamination through water erosion and riverine sediment transfer processes was anticipated (Evrard et al, 2015;Onda et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Radionuclide contamination in flood sediment deposits in the coastal rivers draining the main radioactive pollution plume of Fukushima Prefecture, Japan (2011–2020)

Evrard¹,

Chartin²,

Laceby³

et al. 2021

Preprint

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Abstract. Artificial radionuclides including radiocesium (134Cs and 137Cs) and radiosilver (110mAg) were released into the environment following the Fukushima Dai-ichi Nuclear Power Plant accident in March 2011. These particle-bound substances deposited on soils of Northeastern Japan located predominantly within a ~3000 km2 radioactive fallout plume and drained by several coastal rivers to the Pacific Ocean. The current dataset that can be accessed at https://doi.pangaea.de/10.1594/PANGAEA.928594 compiles gamma-emitting artificial radionuclide activities measured in 782 sediment samples collected from 27 to 71 locations during 16 fieldwork campaigns conducted in Japan between November 2011 and November 2020 in river catchments draining the main radioactive plume. This database may be useful to evaluate and anticipate the post-accidental redistribution of radionuclides in the environment and for the spatial validation of models simulating the transfer of radiocesium across continental landscapes.

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Radionuclides from the Fukushima Daiichi Nuclear Power Plant in terrestrial systems

Cited by 118 publications

References 175 publications

Temporal Change in Atmospheric Radiocesium during the First Seven Years after the Fukushima Dai-ich Nuclear Power Plant Accident

Temporal Change in Atmospheric Radiocesium during the First Seven Years after the Fukushima Dai-ich Nuclear Power Plant Accident

Dataset on the 6-year radiocesium transport in rivers near Fukushima Daiichi nuclear power plant

Radionuclide contamination in flood sediment deposits in the coastal rivers draining the main radioactive pollution plume of Fukushima Prefecture, Japan (2011–2020)

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