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Risk Assessment at Krasnoyarsk Region

#0748


Study of Migration Behavior of Radionuclides, among them Transuranium Elements, in the Environment, as Applied to Territories under the Impact of the Nuclear Fuel Cycle Plants. Assessment of Ecological Risks in the Region the Krasnoyarsk...

Tech Area / Field

  • ENV-MRA/Modelling and Risk Assessment/Environment

Status
8 Project completed

Registration date
11.09.1996

Completion date
21.03.2003

Senior Project Manager
Hamada S

Leading Institute
Khlopin Radium Institute, Russia, St Petersburg

Supporting institutes

  • Institute of Geochemistry and Analytical Chemistry, Russia, Moscow\nKrylov Central Research Institute, Russia, St Petersburg\nMining and Chemical Complex, Russia, Krasnoyarsk reg., Zheleznogorsk

Collaborators

  • JAERI / Department of Environmental Safety Research, Japan, Tokyo

Project summary

The principle goal of the program is to develop a basic concept of a long-term forecasting of radioecological consequences of a prolonged exploitation of the Krasnoyarsk mining-chemical combine (MCC) for weapon plutonium production in the region of its situation and the aquatic system the Yenisei river - the Kara Sea. A particular attention is planned to be paid to the study of the contamination character and the migration behavior of radionuclides, among them transuranium elements, in most contaminated parts of the interested aquatic system, i.e., in the coastal parts of islands and ledges of the coastal line.

The background of the work is the data obtained as a result of many-year basic research in the field of the environmental radiochemistry, which was conducted at the Khlopin Radium Institute and the Vernadsky Institute of Geochemistry and Analytical Chemistry; furthermore, the data will be attracted on radioactive contamination of the environment in the territories under the impact of the MCC, which were accumulated by employers of the Radium Institute in cooperation with the MCC Radioecological Center, and also the results obtained at the Krylov Central Research Institute on mathematical modeling of radionuclides' migration in aquatic systems.

Further advanced will be the works on the assessment of the MCC environmental impact at great distances from the MCC, including the estuary of the Yenisei River and the adjacent part of the Kara Sea.

Great efforts will be undertaken in studying mechanisms of the formation of migration-active forms of radionuclides in flood-land grounds and bottom sediments. In this regard, our approach is the treatment of metal fulvate complexes as coordination polymers that are capable of forming either migration-inert gel-phases or mobile solubilized species, depending on various factors such as the degree of saturation of soil matter with sesqui-oxides (Аl2О3 and Fe2O3), acidity, contents of natural and technogenic complexants, etc. These studies should allow estimates of the possibility and consequences of the secondary migration of radionuclides that can result in a drift-over of radionuclides by the Yenisei River flow to the system of Arctic Seas.

The following methods will be used for the realization of the project: most up-to-date methods of radiochemical and g-spectrometric analysis, methods for studying physic-chemical state of radionuclides in natural systems (leaching, ultrafiltration, etc.), spectroscopy (infrared, electron, Raman, luminescence, NMR 1H, 13C, etc.), and mathematical modeling.

As a result of realization of the project the initial data will be obtained for estimating consequences of the exploitation of the MCC and other nuclear fuel cycle plants for the population and for a long-term forecasting radiation situation both.in the territory directly adjacent to the combine and at considerable distances up to the Kara Sea.

The participation in the project of weapons scientists, engineers, and technicians, allows to reorientate their activity to peaceful tasks concerned with the rehabilitation of territories contaminated as a result of the MCC's prolonged operation.

Regarded to international aspect, the project is in direct interrelation with the problems that are treated in frames of such international programs as IASAP (International Arctic Seas Assessment Project), ANWAP (Arctic Nuclear Waste Assessment Program), AMAP (Arctic Monitoring Assessment Program), etc.

Potential Contribution of Non-CIS Collaborators

Comparative analysis of the models used for simulating migration behavior of radionuclides in contaminated territories, particularly in zones under the impact of nuclear fuel cycle plants and in zones adjacent to the sites of disposal of radioactive wastes.

Obtaining new data on coordination-chemical properties and aggregative stability of complexes of polyvalent metals with soil acids, using most up-to-date techniques, such as EXAFS, high-resolution NMR, etc.


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