Nuclear accident-derived 3H in river water of Fukushima Prefecture during 2011–2014

Ueda, Seinosuke; Hasegawa, H.; Kakiuchi, Hideki; Ochiai, Shinya; Akata, Naofumi; Hisamatsu, Shun’ichi

doi:10.1016/j.jenvrad.2015.04.014

Cited by 27 publications

(10 citation statements)

References 11 publications

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“…A tritium inventory on 11 March 2011 for the F1NPS reactor units 1, 2, and 3 were estimated to be in a total of 3.4 × 10 15 Bq 18 . A portion of the tritium was considered to have been released to the atmosphere as tritiated water vapour and scavenged from the atmosphere as precipitation 8 . To strengthen the argument for the second mechanism, the influence of precipitation after the F1NPS accident on the groundwater tritium concentration is considered in conjunction with temporal and spatial variations in the tritium concentrations in precipitation after the accident.…”

Section: Discussionmentioning

confidence: 99%

“…Tritium concentrations in the precipitation in the 5-week period after the accident and background levels for groundwater were used in the model. Tritium concentrations in precipitation before the F1NPS accident were estimated as 6 TU at Tsukuba 7 , and 0.1 to 1.5 Bq/L (0.8 to 13 TU) at Chiba from 2011 to 2014 (a mean of 0.4 ± 0.2 Bq/L (3 ± 2 TU) 8 ) according to the Nuclear Regulation Authority 21 . These values are comparable to natural source tritium concentration in precipitation around the study area, obtained from simulations using Atmospheric General Circulation Models 22 .…”

Section: Discussionmentioning

confidence: 99%

“…Ueda et al . 8 described tritium concentrations in river water collected in the Fukushima prefecture from 2011 to 2014. Concentrations in river water, collected at short time intervals at two rivers under base flow conditions and flood events, were higher in 2011 compared to background levels.…”

Section: Introductionmentioning

confidence: 99%

“…Ueda et al . 8 interpreted this to be a result of water with high tritium concentrations infiltrating to deeper levels and being diluted by soil water or groundwater. In addition, river water collected once a year (from 2012 to 2014) from 16 rivers and one dam under base flow conditions also showed elevated tritium concentrations compared to background levels.…”

Section: Introductionmentioning

confidence: 99%

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Spatial variations of tritium concentrations in groundwater collected in the southern coastal region of Fukushima, Japan, after the nuclear accident

Kashiwaya

Muto

Kubo

et al. 2017

Sci Rep

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Spatial variations in tritium concentrations in groundwater were identified in the southern part of the coastal region in Fukushima Prefecture, Japan. Higher tritium concentrations were measured at wells near the Fukushima Daiichi Nuclear Power Station (F1NPS). Mean tritium concentrations in precipitation in the 5 weeks after the F1NPS accident were estimated to be 433 and 139 TU at a distance of 25 and 50 km, respectively, from the F1NPS. The elevations of tritium concentrations in groundwater were calculated using a simple mixing model of the precipitation and groundwater. By assuming that these precipitation was mixed into groundwater with a background tritium concentration in a hypothetical well, concentrations of 13 and 7 TU at distances of 25 and 50 km from the F1NPS, respectively, were obtained. The calculated concentrations are consistent with those measured at the studied wells. Therefore, the spatial variation in tritium concentrations in groundwater was probably caused by precipitation with high tritium concentrations as a result of the F1NPS accident. However, the highest estimated tritium concentrations in precipitation for the study site were much lower than the WHO limits for drinking water, and the concentrations decreased to almost background level at the wells by mixing with groundwater.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spatial variations of tritium concentrations in groundwater collected in the southern coastal region of Fukushima, Japan, after the nuclear accident

Kashiwaya

Muto

Kubo

et al. 2017

Sci Rep

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show abstract

“…With the development of society, water resources play a crucial role in social and economical construction, and they are becoming a promotion or constraint factor for economic growth [1]. Through analyzing water pollution accidents in recent years [2,3], it was found that environmental pollution accidents have happened in many countries, such as China [4][5][6], the United States [7], and Japan [8]. For example, the Tuojiang river in the Sichuan province was polluted by a high concentration of ammonia nitrogen in 2004 [9]; in March 2011, the Fukushima nuclear accident was triggered by an earthquake and tsunami, which caused many radioactive substances to be deposited into the Pacific Ocean [10]; and the world's first major supertanker disaster occurred in 1967, when the SS Torrey the system has been applied to HDWSA to simulate the change trend of heavy metal pollution (As) under different hydrological (the dry period, the falling period, the impound period, and the flood period) and meteorological conditions (southwest wind, southeast wind, and no wind).…”

Section: Introductionmentioning

confidence: 99%

Accident Trend Prediction of Heavy Metal Pollution in the Heshangshan Drinking Water Source Area Based on Integrating a Two-Dimensional Water Quality Model and GIS

Ding

Fang

2019

Sustainability

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In recent years, water pollution accidents have frequently occurred, which have caused enormous economic loss and an adverse social impact. In this study, an accident trend prediction system was developed based on integrating a two-dimensional water quality model and GIS, and Arsenic (As) was adopted as a typical pollutant to study the temporal-spatial changes of heavy metal pollutions under different hydrological and meteorological conditions in the Heshangshan drinking water source area. The simulation for a recent accident indicated that pollutant changes were influenced by lateral diffusion, longitudinal diffusion, flow velocity, water flow, and the self-purification of the water body. It took 79.5 min for the As concentration to meet the water quality standard during the dry period, while it spent 61.3 min, 71 min, and 52 min in the impound period, falling period, and flood period, respectively. The emergency response times were 32 min (in the flood period), 38 min (in the impound period), 48 min (in the falling period), and 52 min (in the dry period). Furthermore, wind speed and wind direction also had impacts on pollutant spread. The times in which the maximum values met the water quality standard were 71 min (southeast wind), 77 min (southwest wind), and 87 min (no wind). The emergency response times were 38 min (southeast wind), 49 min (southwest wind), and 59 min (no wind). This study not only provides a reference for relevant departments and managers to carry out a risk assessment, disaster prevention, and emergency management after actual pollution accidents, but also makes up for the lack of research on the spatial-temporal change of heavy metal pollutants.

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Spatial and Temporal Fluctuations of Nuclear Accident-Derived Tritium Concentrations in the River Waters of Eastern Fukushima, Japan

Ueda

Hasegawa

Kakiuchi

et al. 2021

Impacts of Fukushima Nuclear Accident on Freshwater Environments

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Nuclear accident-derived 3H in river water of Fukushima Prefecture during 2011–2014

Cited by 27 publications

References 11 publications

Spatial variations of tritium concentrations in groundwater collected in the southern coastal region of Fukushima, Japan, after the nuclear accident

Spatial variations of tritium concentrations in groundwater collected in the southern coastal region of Fukushima, Japan, after the nuclear accident

Accident Trend Prediction of Heavy Metal Pollution in the Heshangshan Drinking Water Source Area Based on Integrating a Two-Dimensional Water Quality Model and GIS

Spatial and Temporal Fluctuations of Nuclear Accident-Derived Tritium Concentrations in the River Waters of Eastern Fukushima, Japan

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