N. Poleshko1 , N. Mikhailova1
1Institute of Geophysical Research, Almaty, Kazakhstan
Abstract:
The regions containing 3 research reactors in Kazakhstan (VVR-K, IGR, IVG-1) were investigated, as well as the suggested site for the construction of a low-enriched uranium bank, to develop methods for the successful estimation of seismic conditions prevalent in places with designed, constructed and exploited facilities in the nuclear field and nuclear industry. To characterize seismic activity of the earth’s crust at the locations of the facilities considered, the currently effective map of general seismic zoning (GSZ) of the Kazakhstan territory was used. For the facilities investigated, the geological, tectonic, geophysical and seismological data (from ancient time to 2015) were collected and analyzed; earthquake catalogues containing 35 thousand earthquakes and 7.4 thousands earthquake focal mechanisms were compiled. The characteristics of background seismicity and seismic and tectonic conditions for the whole observation period and current period are provided using monitoring data. Periodic variations of seismic and tectonic parameters and their relation to seismic mode of the Northern Tien Shan region where the VVR-K reactor is located were determined. Specific features of the strain-stress state parameters before the occurrence of a large earthquake were revealed.
