## Changes in the Underlying Surface and Vegetation in the Chornobyl Exclusion Zone During 1986−2017

O. G. Tyshchenko, V. P. Landin Institute for Safety Problems of Nuclear Power Plants, NAS of Ukraine, 12, Lysogirska st., Kyiv, 03028, Ukraine DOI: doi.org/10.31717/2311-8253.20.4.9 Abstract The analysis results of the type surface and vegetation changes in the Exclusion Zone of Chornobyl Nuclear Power Plant, for the period after accident in 1986 until 2017 are … Read more

## Application of FRP (Fire Radiative Power) to Estimate the Emission of Radionuclides into the Atmosphere due to Forest Fires in the Exclusion Zone in April 2020

M. M. Таlerko Institute for Safety Problems of Nuclear Power Plants, NAS of Ukraine, 12, Lysogirska st., Kyiv, 03028, Ukraine DOI: doi.org/10.31717/2311-8253.20.4.8 Abstract A method is proposed for assessing the activity of radionuclides released into the atmosphere during forest and meadow fires in radioactively contaminated areas, based on using satellite measurement data of the fire … Read more

## Options for Solving the Problem of Parts of the Shelter Object Located Outside the New Safe Confinement

O. V. Balan, S. Gh. Brylka, V. V. Derengovskyi, V. V. Yehorov, L. I. Pavlovskyi, V. M. Rudko, D. O. Khomenko Institute for Safety Problems of Nuclear Power Plants, NAS of Ukraine, 36a, Kirova st., Chоrnobyl, 07270, Ukraine DOI: doi.org/10.31717/2311-8253.20.4.7 Abstract The parts of the Shelter object structures remained outside the New Safe Confinement (protruding … Read more

## Measuring the Equivalent Dose Rate Over the Shelter Object after Completion of the New Safe Confinement

M. V. Saveliev1, 2, V. A. Krasnov2 , A. P. Levchenko2, A. E. Novikov3, A. Y. Evstigneev3, M. A. Pantin4 1 Institute of Mathematical Machines and Systems Problems, NAS of Ukraine, Kyiv, 42, Akademika Glushkov ave, 03187, Ukraine 2 Institute for Safety Problems of Nuclear Power Plants, NAS of Ukraine, 36a, Kirova st., Chornobyl, 07270, … Read more

## New Methodological Approaches in Solving Certification Problem of Historical Solid Radioactive Waste Sent for Burial from Chornobyl Nuclear Power Plant

O. V. Mykhailov, V. M. Bezmylov Institute for Safety Problems of Nuclear Power Plants, NAS of Ukraine, 36a, Kirova st., Chornobyl, 07270, Ukraine DOI: doi.org/10.31717/2311-8253.20.4.5 Abstract Two methodological approaches for radioactive waste (RAW) certification used in RAW management systems in Italy and France, are addressed. Their applicability was assessed in solving certification problem of historical waste accumulated at the … Read more

## Investigation of the Processes of Organic Components Ozonolysis of Liquid Radioactive Waste Model Solutions of VVER Reactors

K. K. Yaroshenko, B. G. Shabalin, G. M. Bondarenko SI “Institute of Environmental Geochemistry of NAS of Ukraine”, 34a, Palladin ave., Kyiv, 03142, Ukraine DOI: doi.org/10.31717/2311-8253.20.4.4 Abstract The article highlights the problem of reprocessing of liquid radioactive waste (LRW) from the Ukrainian nuclear power plants with VVER reactors. The main method of these LRW treatment … Read more

## Analysis of the Thermal Stress State of the Flange Connections Elements of the Emergency Cooling Heat Exchangers During Accidents of the WWER-1000 Nuclear Installation

T. V. Pyrohov1, A. V. Korolev2 1 SE “State Scientific Engineering Center for Control System and Emergency Response”, 64/56, Heroiv Stalinhrada ave, Kyiv, 04213, Ukraine 2 Odessa National Polytechnic University, 1, Shevchenko ave, Odessa, Ukraine, 65044 DOI: doi.org/10.31717/2311-8253.20.4.3 Abstract During the assessment of the static strength of the flange connections elements Dn2130 and Dn2080 of … Read more

## Choosing the Optimal Conditions for Irradiation of Specimens in the Material Testing Channel of the VVR-M Nuclear Reactor

V. I. Borysenko1, V. V. Goranchuk1, E. M. Chalyi2, V. V. Stadnik2 1 Institute for Safety Problems of Nuclear Power Plants, NAS of Ukraine, 12, Lysogirska st., Kyiv, 03028, Ukraine 2 SS “Scientific and Technical Center”, SE “NNEGC ‘Energoatom’”, 22−24, Gogolivska st., Kyiv, 01054, Ukraine DOI: doi.org/10.31717/2311-8253.20.4.2 Abstract The methodology for choosing the optimal conditions … Read more

## Problem Issues of Cores Thermal-Hydraulic Calculation for Prospective Water-Cooled Reactors with Supercritical Parameters

І. G. Sharaevsky, N. М. Fіаlkо, А. V. Nоsоvskyi, L. B. Zimin, Т. S. Vlasenko, G. І. Sharaevsky Institute for Safety Problems of Nuclear Power Plants, NAS of Ukraine, 12, Lysogirska st., Kyiv, 03028, Ukraine DOI: doi.org/10.31717/2311-8253.20.4.1 Abstract The fundamental thermophysical features of the heat exchange process between the heated wall of a vertical channel … Read more

## Nuclear Power and the Environment, Issue 19

SE “State Scientific and Engineering Center for Control Systems and Emergency Response”Institute for Safety Problems of Nuclear Power Plants of NAS of UkraineCO “Ukrainian Nuclear Society” Issue 19 ISSN  2311-8253 Published :  2020-12-16 DOI: doi.org/10.31717/2311-8253.20.4 Problem issues of cores thermal-hydraulic calculation for prospective water-cooled reactors with supercritical parameters І. G. Sharaevsky, N. М. Fіаlkо, А. V. Nоsоvskyi, L. B. Zimin, Т. S. Vlasenko, G. І. Sharaevsky Choosing the optimal conditions … Read more

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