The study proves relevance of specialized software use to solve problems of emergencies prevention of radioactive liquids spills to teach students and graduate students. Main assessment criteria of accidents at radiation-hazardous objects associated with radioactive liquids spillage is identified. A model of radioactive substances transport in emergency rooms is developed. It takes into account physical features of radioactive liquid spill from the source, air pollution during transition of radioactive liquid from the spill surface into the air and subsequent scattering in the emergency room under influence of local air flows. It is determined that the existing software tools for radiation exposure assessment do not comprehensively cover features of such events and possess number of shortcomings regarding accidents modeling with spillage of radioactive liquids indoors. Computer modeling and forecasting examples for hypothetical event related to liquid radioactive spill in the JRODOS system are presented. The training process of future specialists, specialties 183 “Environmental Protection Technologies”, 143 “Nuclear Energy”, 103 “Earth Sciences”, and 122 “Computer Science” should be based on application of powerful scientific and methodological training base using modern achievements in the field of digital technologies. It is advisable to supplement curricula for students` and postgraduate students’ preparation in the mentioned above specialties by studying issues related to: development of mathematical models and software for solving problems of emergencies prevention in case of radioactive liquids spills; usage of features of specialized decision software of emergencies prevention during spills of radioactive liquids.
This study focuses on joint application of the RanidSONNI mobile laboratory hardware and RODOS DSS computer technologies using the example of numerical forecast of radiation consequences for Kyiv residents caused by radioactive cloud under the city resulting from a wildfire in the Chernobyl Exclusion Zone that occurred on 5 June 2018 in Red Forest area. The purpose of the study was, on the one hand, to combine rapid response technologies using mobile environment sampling tools and computer technologies for forecasting the spread of air contamination at long distances based on weather forecast data, and on the other hand, to define true extent of radiation impact of the radiation cloud on Kyiv residents, which according to the meteorological situation had to pass over the city at the moment of wildfire. The interest in the issue raised is preconditioned by difficulties arising when it is necessary to measure short-term air contamination: in many cases it is possible to obtain actual air contamination indices at a long distance from source term location under its short-term impact only in the center of the cloud itself, which is spread from the source term in wind direction. This preconditions a random nature of contamination registering, if registering is done using stationary control posts. As previous studies have shown, the probability that the cloud formed by the source term passes just above the sampling site is low enough. The article presents a general description of implementing the joint operation of computer technologies for numerical forecast for radioactive cloud spread in the environment using RODOS DSS software package and the air monitoring hardware installed on the RanidSONNI mobile laboratory for radiation survey. The article shows specific hardware for sampling and measuring Cs-137 concentrations in the air is shown, presents the results of forecasting radioactive release spread for long distances and the results of assessing exposure doses for Kyiv residents for the whole time of radioactive cloud passage over the city.
Determination of urgent countermeasures to protect the public in early phase of the accident at NPP requires providing of radiological impact assessment at different distances in real time. These activities involve current meteorological forecast data and information about source term parameters as one of the main part of the emergency сenters functioning worldwide for prompt notification about the radiological or nuclear event in the country, as well as abroad in the case of transboundary impact. Experts’ background in the assessment and forecasting of radiological consequences area may vary from country to country in terms of methodological approaches, the use of atmospheric dispersion models, doses assessment models, databases, organization procedures, calculation process etc. Possible deviations in the results of assessments performed by experts from different countries may be caused by a number of factors. Their reasons can vary from the use of different information sources to the specifics of protective actions criteria in accordance with national requirements. These factors should be identified both in practice and scientifically. Radiological consequence assessment activities are harmonized at the international level. It is the target of a wide range of international projects. The paper provides information on modern scientific initiatives aimed at improving assessments and forecasts of radiological consequences to determine urgent countermeasures to protect the public at early phases of an accident at nuclear power plant, in particular, approaches to the initial data preparation and the conduct of assessments and forecasting. A review of international benchmarking activities as well as past emergency exercise overview is presented in the paper. Relevant problems of forecasting radiological consequences in real time are highlighted.
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