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論文

Validation of $$^{131}$$I ecological transfer models and thyroid dose assessments using Chernobyl fallout data from the Plavsk district, Russia

Zvonova, I.*; Krajewski, P.*; Berkovsky, V.*; Ammann, M.*; Duffa, C.*; Filistovic, V.*; 本間 俊充; Kany$'a$r, B.*; Nedveckaite, T.*; Simon, S. L.*; et al.

Journal of Environmental Radioactivity, 101(1), p.8 - 15, 2010/01

 被引用回数:3 パーセンタイル:86.74(Environmental Sciences)

Within the project EMRAS organized by the IAEA in 2003 experimental data of $$^{131}$$I measurements following the Chernobyl accident in the Plavsk district of Tula region, Russia were used to validate the calculations of some radioecological transfer models. Ten participants were involved in the inter-comparison. Levels of $$^{137}$$Cs soil contamination in all the settlements and $$^{131}$$I/$$^{137}$$Cs isotopic ratios in the depositions in some locations were used as the main input information. 370 measurements of $$^{131}$$I content in thyroid of people, and 90 measurements of $$^{131}$$I concentration in milk were used for validation of the model predictions. A remarkable improvement in model performance comparing with previous inter-comparison exercise was demonstrated. Predictions of the various models were within a factor of three relative to the observations, and discrepancies between the estimates of average doses to thyroid produced by most participants did not exceed a factor of ten.

論文

Radioecological assessments of the Iodine working group of IAEA's EMRAS programme; Presentation of input data and analysis of results of the prague scenario

Bartuskov$'a$, M.*; Mal$'a$tov$'a$, I.*; Berkovskyy, V.*; Krajewski, P.*; Ammann, M.*; Filistovic, V.*; 本間 俊充; Horyna, J.*; Kany$'a$r, B.*; Nedveckaite, T.*; et al.

Radioprotection, 44(5), p.295 - 299, 2009/06

In 2003 IAEA launched the EMRAS Programme aiming at evaluating the predictive power of radiological models. The Iodine Working Group reassessed the impact of the release of $$^{131}$$I during the Chernobyl accident with the aim of comparing model predictions with environmental data and inter-comparing the model predictions. As for the Prague Scenario, milk supply regions of three big dairies were chosen for the model validation. The most important peculiarities of Prague Scenario were keeping milk cattle in sheds and a special feeding regime during May 1986. The modelers were asked to assess the $$^{131}$$I content in the thyroid of the local population and the resulting dose. The assessments were compared with measurement data. The results of these model calculations and their comparison with experimental data are presented.

論文

Validation of environmental transfer models and assessment of the effectiveness of countermeasures using data on $$^{131}$$I releases from Chernobyl

Krajewski, P.*; Ammann, M.*; Bartuskov$'a$, M.*; Duffa, C.*; Filistovic, V.*; 本間 俊充; Kany$'a$r, B.*; Mal$'a$tov$'a$, I.*; Nedveckaite, T.*; Simon, S.*; et al.

Applied Radiation and Isotopes, 66(11), p.1730 - 1735, 2008/11

 被引用回数:3 パーセンタイル:71.35(Chemistry, Inorganic & Nuclear)

The studies undertaken by the $$^{131}$$I Working Group, part of the International Atomic Energy Agency's EMRAS (Environmental Modelling for Radiation Safety) programme, were focused primarily on evaluating the predictive capability of environmental models. Particular emphasis was placed on applying models to evaluate the effectiveness of countermeasures.

論文

Validation of ecological $$^{131}$$I transfer models using experimental data of the "Plavsk scenario"

Zvonova, I.*; Krajewski, P.*; Berkovskyy, V.*; Ammann, M.*; Duffa, C.*; Filistovic, V.*; 本間 俊充; Kany$'a$r, B.*; Nedveckaite, T.*; Simon, S.*; et al.

Proceedings of 7th International Conference on Nuclear and Radiochemistry (NRC-7) (CD-ROM), 5 Pages, 2008/08

Environmental Modelling for Radiation Safety (EMRAS) programme was organized by IAEA in 2003. Within this project experimental data of $$^{131}$$I measurements following the Chernobyl accident in the Plavsk district of Tula region, Russia, This scenario was used to validate the calculation results of some ecological models. Results of model calculations and observed data comparison are presented in the report. Discrepancies between the average thyroid doses estimations produced by most participants did not exceed a factor of ten. The time when cows were brought to the pasture is the most bearing factor for thyroid dose estimations.

口頭

Radioecological assessments in iodine working group of the program "IAEA EMRAS"; Analysis of input data and results in scenario prague

Bartuskov$'a$, M.*; Mal$'a$tov$'a$, I.*; Berkovskyy, V.*; Krajewski, P.*; Ammann, M.*; Filistovic, V.*; 本間 俊充; Horyna, J.*; Kany$'a$r, B.*; Nedveckaite, T.*; et al.

no journal, , 

The main objective of the Iodine Working Group (IWG) in program EMRAS launched by IAEA was to improve the assessment models used for calculation of impact of releases of iodine radionuclides to the environment. Activities of IWG were focused primarily at evaluation of the predictive capability of environmental models, notably in relation to the impact of released radioiodine on thyroid exposure via inhalation and ingestion pathways. The Prague Scenario was characterized by countermeasures consisting from limitation of fresh pasture / fodder for dairy cows. The importance of the feedback between model calculations and measured data is stressed by the results of different model calculation in this scenario. For emergency situations, it is important that models enable input of different measured data (contamination of grass, milk etc.) in different steps of calculations.

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