Tritium in Japanese precipitation following the March 2011 Fukushima Daiichi Nuclear Plant accident

Matsumoto, Takuya; Maruoka, Teruyuki; Shimoda, Gen; Obata, Hajime; Kagi, Hiroyuki; Suzuki, Katsuhiko; Yamamoto, Koshi; Mitsuguchi, Takehiro; Hagino, Kyoko; Tomioka, Naotaka; Sambandam, Chinmaya; Brummer, Daniela; Klaus, Philipp Martin; Aggarwal, Pradeep

doi:10.1016/j.scitotenv.2012.12.069

Cited by 68 publications

(42 citation statements)

References 9 publications

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“…Due to the water vapour exchange between the atmosphere and the sea (ocean) surface, coastal and oceanic stations show considerably lower tritium activity than the continental stations because the moisture evaporating from the sea/ocean is low in tritium content (ehhalt, 1971;Vreča et al, 2006). With the more-or-less natural tritium levels in modern precipitation, the technogenic emissions of tritium (from nuclear facilities, or from manufacturing or disposal of luminous consumer products, planned fusion demo facilities) are becoming more and more visible (hebert, 1990;rozansKI et al, 1991;MatsuMoto et al, 2013), and the knowledge of natural tritium distribution remains important from the environmental pollution point of view (thoMpson et al, 2015;ueda et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Isotopic composition of precipitation at the station Portorož, Slovenia – period 2007–2010

Vreča¹,

Bronić²,

Leis³

2015

Geologija

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The stable isotopic composition of oxygen and hydrogen (δ 18 O and δ 2 H) and the tritium activity (A) were monitored in precipitation at synoptic station Portorož (Slovenia) during the period 2007-2010. Monthly and yearly isotope variations are discussed and compared with those observed over the period 2001-2006 and with the basic meteorological parameters. The mean values for δ 18 O and δ 2 H, weighted by precipitation, are-6.28 ‰ and-41.6 ‰, and these values are 0.35 ‰ and 1.6 ‰ higher but not significantly different than for the period 2001-2006. The reduced major axis (RMA) local meteoric water line (LMWL RMA) for the period 2007-2010 is δ 2 H = (8.14 ± 0.25)×δ 18 O + (8.28 ± 1.64), while the precipitation weighted least square regression (PWLSR) results in LMWL PWLSR δ 2 H = (7.87 ± 0.28)×δ 18 O + (7.97 ± 1.87). The deuterium excess (δ) weighted mean value is 8.6 ‰ and is 1.2 ‰ lower than in 2001-2006, while the temperature coefficient of δ 18 O is 0.21 ‰/°C and is for 0.02 ‰/°C higher than for the previous period. The mean Mediterranean precipitation index (MI) for the period 2007-2010 is 2.3. Lower values of MI and deuterium excess than in the preceding period indicate stronger continental climatic character during observation period, however the differences are not statistically significant. The weighted mean tritium activity is 6.4 TU, which is 0.5 TU lower but not significantly different than in 2001-2006. Izvleček V prispevku obravnavamo izotopsko sestavo kisika in vodika (δ 18 O in δ 2 H) ter aktivnosti tricija (A) v mesečnih vzorcih padavin, ki smo jo spremljali na sinoptični postaji Portorož (Slovenija) v obdobju 2007-2010. Analizirali smo mesečne in letne spremembe izotopske sestave padavin in jih primerjali z nizom podatkov za obdobje 2001-2006 ter z osnovnimi meteorološkimi parametri. Srednje tehtane vrednosti δ 18 O in δ 2 H določene ob upoštevanju izmerjene količine padavin znašajo

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Section: Introductionmentioning

confidence: 99%

Isotopic composition of precipitation at the station Portorož, Slovenia – period 2007–2010

Vreča¹,

Bronić²,

Leis³

2015

Geologija

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“…Thus, the peak 3 H concentrations in the Hiso and Wariki rivers during 2011 were approximately 5e6 times the background 3 H concentration. As described before, Matsumoto et al (2013) reported that the 3 H concentration in the precipitation collected in Tsukuba City was 30 times the background concentration. They estimated the 3 H concentration in the air at Iitate Village, where our sampling points in both rivers were located, to be approximately 10 Bq m À3 -air immediately after the accident based on the relationship between the 3 H activity in air and distance from the FDNPP.…”

Section: H Concentrations In River Water During Base Flow Conditionmentioning

confidence: 54%

“…The FWT concentrations in plants about one month after the accident have been shown to depend roughly on distance from the FDNPP, with a maximum FWT concentration of 167 Bq L À1 at Namie Town, which is located 20 km northwest of the FDNPP. Matsumoto et al (2013) reported a distance dependence of 3 H concentrations in precipitation samples collected at sampling sites 170e700 km from the FDNPP. They reported that 3 H levels in the first rain on 21 March 2011 at Tsukuba City, which is located 170 km from the FDNPP to the southwest, were approximately 19 Bq L À1 , 30 times the level before the accident.…”

Section: Introductionmentioning

confidence: 99%

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

Ueda

Hasegawa

Kakiuchi

et al. 2015

Journal of Environmental Radioactivity

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“…In general, the specific activity of T will increase in Niigata city in the spring due to spring peak. 10) In addition, in previous report, 11) the high specific activity of T disappeared in a few weeks after the accident. Nevertheless, this research shows that the specific activity of T almost disappeared after four months from the accident.…”

Section: Monthly Precipitationmentioning

confidence: 68%

Observation of Tritium Behavior Both in Monthly Precipitation in Niigata City and in Spring Water at Top of Mt. Zao and Some Mountains in Fukushima Prefecture After the Fukushima Dai-ichi Nuclear Power Plant Accident

et al. 2016

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In 2011, the released radioactive materials including tritium (T) from damaged reactors at Fukushima Daiichi nuclear power plant has caused much environmental problems. After the Fukushima Dai-ichi NuclearPower Plant Accident, the specific activity of T in precipitation was increased in Niigata city. In this study, each monthly precipitation (imitative ground infiltrated precipitation) was collected at the rooftop of NiigataUniversity. Such a sample was subsequently enriched by electrolytic enrichment method (SPE method), and the specific activity of T of each enriched sample was measured by low-background liquid scintillation counter. In addition, the relation between specific activity of T and nssCa 2+ (i.e., non-sea-salt

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Tritium in Japanese precipitation following the March 2011 Fukushima Daiichi Nuclear Plant accident

Cited by 68 publications

References 9 publications

Isotopic composition of precipitation at the station Portorož, Slovenia – period 2007–2010

Isotopic composition of precipitation at the station Portorož, Slovenia – period 2007–2010

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

Observation of Tritium Behavior Both in Monthly Precipitation in Niigata City and in Spring Water at Top of Mt. Zao and Some Mountains in Fukushima Prefecture After the Fukushima Dai-ichi Nuclear Power Plant Accident

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