Materials of the International Conference
50th Anniversary of the International Geophysical Year
and Electronic Geophysical Year

16-19 September 2007 • Suzdal, Russia

The stability of geological environment and geoecological safety in objects of nuclear-fuel cycle

V. N. Morozov, S. V. Belov, I. Yu. Kolesnikov, and V. N. Tatarinov

Geophysical Center, Russian Academy of Sciences, Moscow, Russia

Abstract

Now in Russia, 10 nuclear power plants with 31 reactors and industrial units keeping them work are operating, which are commonly called nuclear-fuel cycle (NFC) objects: mining enterprises, radiochemical plants for production and utilization of wasted nuclear fuel, repositories and test sites of radioactive waste (RAW) disposal. Disastrous consequences of accidents in NFC objects imposed more severe requirements on geoecological safety, because besides for technological reasons, radionuclide release into the environment may be caused by geoecological factors. The interaction mechanism in the system "object – geological environment" is decisive factor in the geoecological safety of NFC objects. In this case, a burning scientific and practical problem is the prediction of geological environment stability, by which is meant that it retains engineering geological characteristics or changes them under natural or anthropogenic impacts within the boundaries that do not result in dislocations and strains hazardous for NFC objects in the theoretical time of operating. With new methods of recording earth crust displacements on the basis of satellite navigation systems (GPS and GLONASS), it becomes possible for the first time to measure horizontal deformations with high precision, promptly and on large bases and to construct models of strain and stress of the geological environment that adequately show modern geodynamic processes in the earth crust. Thus we elaborated a new method to differentiate territories locating NFC objects by the degree of stability, which takes into account horizontal velocities fields of the earth crust deformation. For the first time, experimental data were obtained on the components of horizontal earth crust displacements in the areas where nuclear power plants are located in the East European platform. To predict the environment stability with high-level RAW disposal a technology of structural tectonic blocks destruction prognosis was developed. The technology was tested in Nizhnekanskiy granitoid massif. It comprises new algorithms of cluster search for deep structural heterogeneities and for modern tectonic activity indicators and finite-element models of separating geodynamic zones in heterogeneous block environment. In this environment, the stability measure is stress intensity, the square of which is equivalent to specific potential energy of deformation. In this case, GPS observations results on earth crust deformation will be used to correct boundary conditions of the models stress state.

Citation: V. N. Morozov, S. V. Belov, I. Yu. Kolesnikov, and V. N. Tatarinov (2007), The stability of geological environment and geoecological safety in objects of nuclear-fuel cycle, in: Materials of the International Conference '50th Anniversary of the International Geophysical Year and Electronic Geophysical Year', GC RAS, Moscow, doi:10.2205/2007-IGY50conf.

© 2007 Geophysical Center RAS and authors


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