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REDUCTION OF THE GEODYNAMIC RISK IN THE DISPOSAL OF RADIOACTIVE WASTE IN GEOLOGICAL FORMATIONS
Abstract
The paper presents the results of the study of modern movements of the Earth's crust in the southern part of the Nizhnekanskiy massif according to global navigation satellite systems (GPS/GLONASS). The article presents preliminary results of geodynamic zoning of the Yeniseisky site based on the methods of system analysis. Nizhnekanskiy massif is located at the junction of major tectonic structures - the Siberian Platform and West Siberian Plate. Its southern part is characterized by stable tectonic regime, the average speed of uplift according to geological data is 0.2-0.3 mm per year with the total amplitude of 400-500 m. However, the speed of modern movements of the Earth's crust is by more than an order of magnitude higher due to the temporary effect of large-scale geodynamic movements. The Yenisei River divides the area into two parts. The left bank is characterized by predominantly negative vertical movements and the right bank by positive ones. It is planned to build an underground research laboratory in this area for the study of the ecological safety of disposal of high-level radioactive waste (HLRW) in geological formations. The observations, carried out in 2010-2016, provided data on modern horizontal geodynamic movements on the border of the largest tectonic structures. In 2013-2014 an activation cycle was registered, which manifested itself in the sign change (compression-tension) and increasing the velocity of crustal deformation at the boundary of these structures.
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