Use Ukrainian nuclear power plants local seismological networks as elements of the national seismological monitoring system

In accordance with the requirements for seismic design and seismic safety assessment of nuclear power units, the operating organization organizes a special local network of permanent highly sensitive seismic monitoring stations in the area of the NPP location. In the process of implementing the “Seismic Hazard Assessment and Seismic Resistance Action Plan” of existing NPPs, seismic monitoring networks were deployed at Ukrainian NPPs. Operational processing and analysis of seismic signals registered on the elements of local seismological networks of NPPs is carried out by the Main Center for Special Control of the State Space Agency of Ukraine. To date, the MCSC receives data from the local seismological networks of Rivne, Khmelnytsky and Zaporizhzhya NPPs in a continuous mode. The processing of geophysical information coming from the NPP to the MCSC is carried out by the operational next shift of the center with the help of FSC hardware and software, and provides reliable data on the parameters of seismic sources registered by stations, their location and energy characteristics. In total, in the period from 2017 to 2021, 36 local earthquakes on the territory of Ukraine were registered by NPP seismological network stations. The epicenters of the vast majority of them are located within the Ivano-Frankivsk, Ternopil and Lviv regions. The experience of conducting instrumental observations at NPP seismic stations testifies to their high efficiency and possibility of use as full-fledged elements of seismological monitoring of the territory of Ukraine.