External and internal irradiation of a Rural Bryansk (Russia) population from 1990 to 2000, following high deposition of radioactive caesium from the chernobyl accident

Title: External and internal irradiation of a Rural Bryansk (Russia) population from 1990 to 2000, following high deposition of radioactive caesium from the chernobyl accident
Author: C. Thornberg, R. Vesanen, E. Wallström, I. Zvonova, T. Jesko, M. Balonov, S. Mattsson
Reference: Radiation and Environmental Biophysics, Volume 44, Issue 2 , pp 97-106

doi: 10.1007/s00411-005-0007-2
Keywords : radiocesium, Bryansk

Abstract: In 1990, a joint Nordic-Russian project was initiated in order to make independent estimations of the effective dose to selected groups of inhabitants in a highly contaminated area around the city of Novozybkov in the western Bryansk region of Russia. The inhabitants were living in six villages with initial contamination levels of ¹³⁷Cs between 0.9 and 2.7 MBq m⁻². Some villages had been decontaminated, others not. Both school children and adults participated in the study.

ＵＲＬ: http://link.springer.com/article/10.1007/s00411-005-0007-2

Removal of Radioactive Cesium from Surface Soils Solidified Using Polyion Complex Rapid Communication for Decontamination Test at Iitate-mura in Fukushima Prefecture

Title: Removal of Radioactive Cesium from Surface Soils Solidified Using Polyion Complex Rapid Communication for Decontamination Test at Iitate-mura in Fukushima Prefecture

Author: Hirochika NAGANAWA, Noriyuki KUMAZAWA, Hiroshi SAITOH, Nobuyuki YANASE, Hisayoshi MITAMURA, Tetsushi NAGANO, Kaoru KASHIMA, Tatsuya FUKUDA, Zenko YOSHIDA, Shun-ichi TANAKA

Reference: Transactions of the Atomic Energy Society of Japan, Released 2011/09/27

DOI: http://dx.doi.org/10.3327/taesj.J11.017

Keywords: polyion complex, decontamination of surface soil, suppression of dust release, Iitate-mura, upland field in a plastic greenhouse, pasture, paddy field, radioactive cesium

Abstract: We tried the decontamination of surface soils for three types of agricultural land at Nagadoro district of Iitate-mura (village) in Fukushima Prefecture, which is highly contaminated by deposits of radionuclides from the plume released from the Fukushima Daiichi nuclear power plant. The decontamination method consisted of the peeling of surface soils solidified using a polyion complex, which was formed from a salt solution of polycations and polyanions. Two types of polyion complex solution were applied to an upland field in a plastic greenhouse, a pasture, and a paddy field. The decontamination efficiency of the surface soils reached 90%, and dust release was effectively suppressed during the removal of surface soils.

ＵＲＬ：https://www.jstage.jst.go.jp/article/taesj/advpub/0/advpub_J11.017/_article

Application of potassium chloride to a Chernobyl-contaminated lake: modelling the dynamics of radiocaesium in an aquatic ecosystem and decontamination of fish

Title: Application of potassium chloride to a Chernobyl-contaminated lake: modelling the dynamics of radiocaesium in an aquatic ecosystem and decontamination of fish

Author: James T Smith, Anatoly V Kudelsky, Igor N Ryabov, Rolf H Hadderingh, Anatoly A Bulgakov

Reference: Science of The Total Environment, Volume 305, Issues 1–3, 15 April 2003, Pages 217-227

DOI: http://dx.doi.org/10.1016/S0048-9697(02)00477-1

Keywords: Chernobyl; Fish; Radiocaesium; Countermeasures

Abstract: This study tests a whole-lake experiment to reduce the bioaccumulation of radiocaesium (¹³⁷Cs) in fish in lakes contaminated by the Chernobyl accident. In many lakes in the Chernobyl contaminated areas, radiocaesium activity concentrations in fish are still significantly higher (up to 100 times in some species) than acceptable limits for human consumption. Estimates of the long-term rate of decline of ¹³⁷Cs in fish in these regions, in the absence of countermeasures, show that radioactivity in fish in some lakes may remain above acceptable consumption limits for a further 50–100 years from the present date. In February 1998 we applied 15 t of potassium chloride to Lake Svyatoe, Kostiukovichy. The addition of potassium chloride fertilizer to the lake resulted in a decrease in activity concentration of ¹³⁷Cs to approximately 40% of pre-countermeasure values in a number of different fish species. In contrast to Lake Svyatoe, ¹³⁷Cs activity concentrations in fish from four control lakes showed no systematic decrease over the study period. Simplified models for transfers of ¹³⁷Cs in lakes successfully ‘blind’ predicted the changes in ¹³⁷Cs in water and fish resulting from this major alteration of the potassium concentration of the lake. The experiment represents the first test of a predictive model for the dynamics of radiocaesium in response to a major perturbation in potassium (its major competitor ion) in a whole lake ecosystem.

URL: http://www.sciencedirect.com/science/article/pii/S0048969702004771

Radiocaesium concentration factors of Chernobyl-contaminated fish: a study of the influence of potassium, and “blind” testing of a previously developed model

• Title: Radiocaesium concentration factors of Chernobyl-contaminated fish: a study of the influence of potassium, and “blind” testing of a previously developed model

Author: Smith, James T / Kudelsky, Anatoly V / Ryabov, Igor N / Hadderingh, Rolf H

Reference: Journal of Environmental Radioactivity, 48 (3), p.359-369, May 2000

doi: 10.1016/S0265-931X(99)00089-2

Keywords: Radiocaesium; Fish; Chernobyl; Modelling

Abstract: The radiocaesium concentration factors (CF) of different fish species in 10 lakes in Russia, Belarus and Ukraine were measured between 6 and 11 yr after the Chernobyl accident. Clear inverse relations were observed between fish CF and lakewater K⁺ concentration.

URL: http://www.sciencedirect.com/science/article/pii/S0265931X99000892