All-Russian Research Institute of Radio Equipment

A prognosis is made of the radiation impact of planned atmospheric emissions and liquid discharges from NPP with VVER-1200 on native ecosystems. The ERICA assessment tool was used to assess the dose loads for ICRP-recommended representative organisms. The expected irradiation dose from NPP for representatives of the biota is compared with the dose from the existing irradiation, evaluated on the basis of radioecological inspection in the locale of power plants in Kaliningrad region. The dose loads on the biota are expected to be below the threshold levels of irradiation. Planned emissions and discharges from the NPP will not have an appreciable impact on the native ecosystems.

The purpose of this work is to develop a migration-dosimetric model of the formation of the irradiation of grassy plants in meadow biogeocenoses under constant radioactive fallout. The model makes it possible to calculate the volumetric activity of radionuclides in the atmospheric surface layer and the intensity of their deposition on the earth surface, the dynamics of the activity of radionuclides in the elements of meadow biogeocenoses, and the absorbed irradiation dose rate for grassy plants. Test calculations were performed for constant fallout of 131I and 137Cs. It is shown that during the growing season the highest accumulation of radionuclides as a result of constant fallout occurs in plant litter. During prolonged radioactive fallout, radionuclides accumulate in the sod mat; this source of radiation determines the maximum absorbed dose rate for meadow plants.

The analysis of influence of Doppler frequency shift on effectiveness of compression of phase-shift keyed signals with increased processing gain is performed. The matched filter and the mismatched sidelobe-free filter were considered as signal compression filters, the signal with pulse compression in accordance with P3 codes was considered as a phase-shift keyed signal.