FUKUSHIMA FALLOUT IN SAKHALIN REGION, RUSSIA, PART 2: 137Cs AND 134Cs IN GRASSLAND VEGETATION

Рамзаев, В. П.; Барковский, А. Н.; Громов, А. В.; Иванов, С. А.; Кадука, М. В.

doi:10.21514/1998-426x-2018-11-2-7-19

Cited by 2 publications

(27 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Фактор накопления радиоактивного цезия в паре (молоко)/(смешанные травяные сообщества) был рассчитан как отношение среднего значения T ag для молока к среднему значению T ag для растительности. Значения T ag для луговой растительности (СТС) были взяты из статьи Ramzaev et al [18].…”

Section: Resultsunclassified

“…The investigated areas and the properties of soil and vegetation in grasslands have already been described in [8,14,17,18].…”

Section: Methodsmentioning

confidence: 99%

“…Одна из причин заключалась в том, что на момент подготовки и выхода книги [8] в 2012 г. оценки, касающиеся соотношения активностей 134 Cs/ 137 Cs в выпадениях, запаса радиоцезия в почве и радиоактивного загрязнения растений на лугах, были неполными. В настоящее время после публикации дополнительных экспериментальных данных и обобщенных оценок по вышеуказанным вопросам [14][15][16][17][18] параметры перехода радиоцезия в цепочке «почва -трава -корова -молоко» могут быть оценены количественно. Кроме того, у авторов была возможность отобрать и проанализировать еще одну серию проб коровьего молока в Сахалинской области в 2012 г. Это позволило оценить динамику уровня радиоактивного загрязнения в первый и второй год после аварии.…”

Section: Methodsunclassified

“…The radiocaesium (cow's milk)/(pasture grass) concentration ratio, CR, was calculated as the ratio of the mean value of T ag for milk to the mean value of T ag for vegetation. The T ag values for pasture grasses (GFC) were obtained from the paper by Ramzaev et al [18].…”

Section: материалы и методыmentioning

confidence: 99%

“…One of the reasons was the fact that at the moment of publishing the book [8] in 2012, the assessments of the 134 Cs/ 137 Cs activities ratio in Fukushima fallout, the radiocaesium inventories in soils and the radioactive contamination of plants in grasslands were incomplete. Currently, after publication of additional experimental data and generic estimations focused on the above mentioned issues [14][15][16][17][18], the transfer parameters in the "soil-grass-cow-milk" pathway can be evaluated quantitatively. Additionally, the authors had an opportunity to collect and analyze a new series of cow's milk samples in Sakhalin Region in 2012.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Fukushima Fallout in Sakhalin Region, Russia, Part 3: 137cs and 134cs in Cow’s Milk

Рамзаев

Барковский

Громов

et al. 2018

Radiac. gig. (2008)

Self Cite

View full text Add to dashboard Cite

period. Radiocaesium was isolated from thermally treated specimens using the antimony-iodide radiochemical method. The activity concentrations of 134 Cs and 137 Cs were measured by γ-ray spectrometry using high purity germanium detectors. Caesium-134 was detected in 18 of the total 22 samples of milk. The activity concentration of 134 Cs in the samples varied from 0.08 Bq kg -1 to 2.00 Bq kg -1 . Caesium-137 was quantified in all 22 samples: range = 0.088-2.43 Bq kg -1 . On average, more than a half of the total 137 Cs in the milk samples from Sakhalin Region was of Fukushima origin (mean = 60%, median = 57%, range = 13-95%). The highest activity concentrations and values of the soil-to-milk aggregated transfer coefficient, T ag , for 134 Cs (and Fukushimaderived 137 Cs) were observed in milk samples collected in mid-May 2011. The mean T ag values decreased in the May-October period of 2011 from 12 × 10 −3 m 2 kg -1 to 2.3 × 10 −3 m 2 kg -1 . In September 2012, the T ag values remained unchanged (mean = 2.8 × 10 −3 m 2 kg -1 ) compared to those in September-October 2011. In the autumns of 2011 and 2012, the calculated values of T ag for Fukushima-derived radiocaesium were on average 17 times larger than the ones for pre-Fukushima 137 Cs. The higher transfer of Fukushima-derived 137 Cs (compared to pre-Fukushima 137 Cs) for milk reflected the difference between the "new" and "aged" radiocaesium in the intensity of the radionuclide transfer from soil to grassland plants which were the major component of the cow's diet in the area of our study. The ratio between the 137 Cs activity concentration in the milk (fresh weight) and that in the grassland plants (dry weight) ranged from 0.028 to 0.11. The effective dose from ingestion of Fukushima-derived radiocaesium in locally produced cow's milk for critical group of adult residents of the southern Kuril in the first year after the accident is conservatively estimated as 0.0027 mSv. The Fukushima accident has had a negligible impact on radiocaesium contamination of cow's milk and the corresponding human exposure on the southern Kuril Islands: Shikotan, Kunashir and Iturup. Фукусимские выпадения в Сахалинской области России, сообщение 3: 137 Cs и 134 Cs в коровьем молоке В.П. Рамзаев, А.Н. Барковский, А.В. Громов, М.В. Кадука Санкт-Петербургский научно-исследовательский институт радиационной гигиены имени профессора П.В. Рамзаева, Федеральная служба по надзору в сфере защиты прав потребителей и благополучия человека, Санкт-Петербург, Россия Исследование проводилось на островах Кунашир, Шикотан и Итуруп (Сахалинская область России) для оценки влияния аварии на АЭС «Фукусима-1» на радиоактивное загрязнение коровьего молока. Всего в период с мая 2011 г. по сентябрь 2012 г. было отобрано 22 пробы молока. Радиоактивный цезий выделяли из проб после их сжигания и озоления с использованием радиохимического сурьмянойодидного метода. Удельную активность 134 Cs и 137 Cs определяли методом гамма-спектрометрии с использованием детекторов из особо чистого германия. Цезий-134 был о...

show abstract

Section: Resultsunclassified

“…The investigated areas and the properties of soil and vegetation in grasslands have already been described in [8,14,17,18].…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsunclassified

Section: материалы и методыmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fukushima Fallout in Sakhalin Region, Russia, Part 3: 137cs and 134cs in Cow’s Milk

Рамзаев

Барковский

Громов

et al. 2018

Radiac. gig. (2008)

Self Cite

View full text Add to dashboard Cite

show abstract

Estimation of the air kerma rate from <sub>137</sub>Cs and <sub>134</sub>Cs deposited on the ground in the Sakhalin region of Russia after the Fukushima accident

Рамзаев

Барковский

2019

Radiac. gig. (2008)

Self Cite

View full text Add to dashboard Cite

Previous studies conducted by the Federal Service for Surveillance on Consumer Rights Protection and Human Well-Being (Rospotrebnadzor) in Sakhalin Region, Russia in 2011–2012 have shown that soils on the southern Kuril Islands were contaminated with 137Cs and 134Cs due to the accident at the Fukushima-1 NPP. In this study, we evaluated the air kerma rate from 137Cs and 134Cs using earlier published data on the vertical distribution of Fukushima-derived radiocaesium in the soil at grasslands on the islands of Kunashir, Shikotan and Iturup. The air kerma rate due to gamma-rays from pre-Fukushima 137Cs was estimated as well. In the period from May 2011 to September 2012, the air kerma rate due to the fresh fallout of radioactive caesium varied from 0.31 to 0.84 nGy h−1. On average, the contribution of the radiation from Fukushima-derived 134Cs and 137Cs to the total air kerma rate from radioactive cesium was 35% in the fall of 2011 and 25% in the fall of 2012. The mean normalized kerma rate from Fukushima-derived 137Cs was estimated at a level of 1.63 nGy h−1 per kBq m−2 in mid-May 2011, 1.53 nGy h−1 per kBq m−2 in autumn 2011 and 1.45 nGy h−1 per kBq m−2 in autumn 2012. The mean normalized air kerma rate from pre-Fukushima 137Cs at reference undisturbed grasslands was estimated as 0.77 nGy h−1 per kBq m−2. The results of our calculations of the air kerma rate from Fukushima-derived 137Cs were in good agreement with the forecast of the 2013 UNSCEAR model, which was used to estimate the external doses of the Japanese population after the Fukushima accident. For pre-Fukushima 137Cs, the UNSCEAR model underestimated the calculated normalized air kerma rates in Sakhalin Region by approximately 40%. Our calculations showed that, overall, the aboveground biomass of herbaceous plants had practically no effect on the air kerma rate from radioactive cesium contained in the soil. The fallout of 134Cs and 137Cs after the accident at the Fukushima-1 NPP did not lead to any significant increase in the gamma dose rate in the air at grasslands on Kuril Islands. In 2019–2020, the contribution of radiocaesium to the total gamma dose rate in air will not exceed 5%.

show abstract

FUKUSHIMA FALLOUT IN SAKHALIN REGION, RUSSIA, PART 2: 137Cs AND 134Cs IN GRASSLAND VEGETATION

Abstract: Samples of vegetation (vascular plants)

Cited by 2 publications

References 13 publications

Fukushima Fallout in Sakhalin Region, Russia, Part 3: 137cs and 134cs in Cow’s Milk

Fukushima Fallout in Sakhalin Region, Russia, Part 3: 137cs and 134cs in Cow’s Milk

Estimation of the air kerma rate from <sub>137</sub>Cs and <sub>134</sub>Cs deposited on the ground in the Sakhalin region of Russia after the Fukushima accident

Contact Info

Product

Resources

About