State Scientific and Technical Center for Nuclear and Radiation Safety

Kiev, Ukraine

State Scientific and Technical Center for Nuclear and Radiation Safety

Kiev, Ukraine
SEARCH FILTERS
Time filter
Source Type

Nosovsky A.,State Scientific and Technical Center for Nuclear and Radiation Safety
Nuclear and Radiation Safety | Year: 2016

Many organizations and institutions participated in the elimination of ChNPP-4 accident. However, the main efforts on conservation of the damaged unit and ChNPP- 3 commissioning were performed in 1986-1987 by experts of the enterprises and organizations of the Ministry of Medium Machine Building of the Soviet Union, who have been sent to the staff of the specially created Construction Administration US- 605. The paper presents the activity of US-605 experts, describes administrative and technical measures of radiation safety during construction of the Shelter in difficult radiation conditions. Such efforts enabled accumulation of significant and unique experience in mitigation of severe accident consequences, which shall be used to prevent any nuclear accidents and eliminate their consequences. © A. Nosovsky, 2016.


Khalimonchuk V.,State Scientific and Technical Center for Nuclear and Radiation Safety | Kuchin A.,State Scientific and Technical Center for Nuclear and Radiation Safety | Tokarevsky V.,Institute for Chornobyl Problems
Nuclear and Radiation Safety | Year: 2016

The paper analyzes physical peculiarities of RBMK leading to catastrophic progression of the accident at ChNPP-4 on 26 April 1986. The modeled transient, which preceded the accident, and modeling of its first phase showed that introduction of absorbing rods into the core played a decisive role in the accident progression. © V. Khalimonchuk, A. Kuchin, V. Tokarevsky, 2016.


Kukhotsky O.V.,State Scientific and Technical Center for Nuclear and Radiation Safety | Nosovsky A.V.,Ukrainian Academy of Sciences | Dybach O.M.,State Scientific and Technical Center for Nuclear and Radiation Safety
Problems of Atomic Science and Technology | Year: 2017

This article focuses on the development of independent thermohydraulic models of the core elements of the research nuclear subcritical facility. Its design and construction is currently being implemented by the National Science Center “Kharkov Institute of Physics and Technology”. The article describes the process of modeling neutron-generating target and the fuel assembly of “Neutron Source”. Moreover, the results of the verification calculations of the developed models are also clarified. These models are unique, because they were made for the first time for the key elements of subcritical facility using CFD code ANSYS CFX. © 2017, National Science Center, Kharkov Institute of Physics and Technology. All rights reserved.


Yesypenko Y.,State Scientific and Technical Center for Nuclear and Radiation Safety | Pecherytsia O.,State Scientific and Technical Center for Nuclear and Radiation Safety | Shevchenko I.,State Scientific and Technical Center for Nuclear and Radiation Safety
Nuclear and Radiation Safety | Year: 2017

The paper presents an overview of the key constituents of SSTC NRS international activity as of early 2017 and provides a number of examples. A tendency to further expansion of international activity is demonstrated. Areas and targets for further development and improvement of SSTC NRS international activity are identified.


Vlasenko M.,Energoatom Company | Hodun O.,Energoatom Company | Shenderovych V.,State Scientific and Technical Center for Nuclear and Radiation Safety
Nuclear and Radiation Safety | Year: 2017

According to the practice of assessing NPP units applying EUR criteria (European Utility Requirements) and IAEA Methodology INPRO (Innovation Nuclear Reactors and Fuel Cycle), the paper presents developed criteria for the assessment of NPP designs of various suppliers that are proposed to be implemented in Ukraine. It is assumed to give the relevant numerical score. The paper defines the algorithm to receive evaluation summary characterizing acceptability of NPP power unit for construction in Ukraine.


Maltseva T.,State Scientific and Technical Center for Nuclear and Radiation Safety | Horpinchenko O.,State Scientific and Technical Center for Nuclear and Radiation Safety | Gumenyuk D.,State Scientific and Technical Center for Nuclear and Radiation Safety
Nuclear and Radiation Safety | Year: 2017

The paper analyzed the advisability of zinc injection into the VVER primary system coolant in order to minimize radioactive fields of equipment. In the western NPPs with PWR, zinc injection into the coolant leads to permanent decrease of dose rates caused by radioactive cobalt. Zinc is introduced into the oxide film on the primary system equipment surfaces to form the most stable zinc spinel, which prevents the further introduction of radioactive cobalt in the oxide film. Predictive assessments for VVER-1000 show that under the zinc concentration of μg/dm3 in the coolant, cation vacancies in the spinel lattice will be occupied mostly by zinc, preventing the penetration of cobalt in the spinel and increase of radioactive fields of equipment.


Bogorad V.,State Scientific and Technical Center for Nuclear and Radiation Safety | Lytvynska T.,State Scientific and Technical Center for Nuclear and Radiation Safety | Bielov I.,State Scientific and Technical Center for Nuclear and Radiation Safety
Nuclear and Radiation Safety | Year: 2017

The paper presents a brief description of the Real-time On-line Decision Support System (RODOS) and MELCOR Accident Consequence Code System (MACCS) and evaluates the application of these codes for assessment of radiation impact on the public and environment in case of a severe accident at NPP in real time mode. The experts performed comparative analysis of results obtained from calculations using RODOS, WinMACCS and HotSpot codes. In the framework of the research, the chosen comparative criteria were assessed: total effective dose, thyroid equivalent dose, skin equivalent dose, I-131 and Cs-137 ground concentration at different distances up to 50 kilometers from the source of release.


Snisar I.B.,State Scientific and Technical Center for Nuclear and Radiation Safety
Nuclear and Radiation Safety | Year: 2014

This paper analyzes a mathematical model of ionizing radiation fields generated near material surfaces by the sources distributed over them. It is shown that there is an objective limit of their spatial heterogeneity, and this limit does not depend on the distribution of sources on surfaces. Some possible applications of the obtained result in radiation protection and dosimetry have been identified.


Snisar I.,State Scientific and Technical Center for Nuclear and Radiation Safety
Nuclear and Radiation Safety | Year: 2015

The paper presents original procedures for zoning, survey optimization and verification of surface radiation fields dosimetry data. These procedures give an opportunity to find unambiguous solutions for the problems of zoning and survey routing of the above fields at any scope of input data, as well as an opportunity to verify field measurements data acquired at any measurement grid and using any methods.


Klevtsov A.,State Scientific and Technical Center for Nuclear and Radiation Safety
Nuclear and Radiation Safety | Year: 2013

The approaches and methods accepted in Ukraine for reliability assessment of NPP instrumentation and control systems are presented in the paper. The software for reliability calculation which was developed by SSTC NRS and results of its verification are described as well.

Loading State Scientific and Technical Center for Nuclear and Radiation Safety collaborators
Loading State Scientific and Technical Center for Nuclear and Radiation Safety collaborators