Nazwa Projektu: Rekonstrukcja członu źródłowego z awarii Elektrowni Jądrowej Fukushima-Daiichi z zastosowaniem systemu JRODOS oraz danych pomiarowych - staż naukowy realizowany w Institute of Environmental Radioactivity, Fukushima University

Akronim Projektu: FUKUSHIMA (MINIATURA 7)

Budżet Projektu: 43 001 PLN

Czas trwania projektu: 28.11.2023 - 27.11.2024

Kierownik Projektu: dr Piotr Kopka

Opis Projektu:

Institute of Environmental Radioactivity was established on July 1, 2013, prompted by the Tokyo Electric Power Company Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. The IER has developed multi-disciplinary projects that cross and integrate the fields and units to conduct basic and applied research on radionuclide behavior in the environment. NCBJ signed in 2023 the Memorandum of Understanding with IER about the joint will on collaborative researches in the field environmental radioactivity and radiation safety. One of the main tasks of the IER is the analysis of the current status of environment in the Fukushima Prefecture, and its proper relation to the source term of the released radioactivity during FDNPP accident and secondary contamination of the different environmental compartments. Therefore it is important to accurately estimate the complicated source term of failures, which consists of many components and for which a sequence of failure events is responsible (hydrogen explosion, the release of radionuclides from the spent fuel pool, etc.). Japan Atomic Energy Research Institute tries to estimate source term components using the wSPEEDI model (worldwide System for Prediction of Environmental Emergency Dose Information ). Nevertheless, the IER would like to have an independent analysis of the event based on a different transport model. The primary scientific objective of this internship is to compare measurements of radionuclide releases during the Fukushima Nuclear Accident with the values simulated by the JRODOS system (Real-time On-line DecisiOn Support) developed within EU EURATOM programs in order to make estimation of the source term. This approach will allow testing many possible accident scenarios and show what values of radionuclides were released and what events were responsible for the contamination during the 2011 accident. Overall, this internship offers an exceptional opportunity to gain insights into the JRODOS dispersion model, conduct valuable comparisons with measured data from the FDNPP accident, and improve its performance by integrating meteorological data formats. The findings of this research will contribute to the broader field of radiological emergency management and enhance our ability to assess and respond to nuclear incidents effectively. Scientific activity of the internship will involve conducting a detailed analysis of the source term of the Fukushima accident and comprehensively modeling the entire accident scenario, including the dispersion of radionuclides. This analysis will be based on measurement data obtained from various sources. This activity aims to thoroughly understand the release characteristics and behavior of radionuclides during the Fukushima Daiichi accident. An accurate representation of the accident can be achieved by analyzing the source term in detail, including factors such as the type of radionuclides released, their quantities, and the timing of releases. Furthermore, this analysis will be used to develop a comprehensive model of the accident and the subsequent dispersion of radionuclides. A more reliable and realistic simulation of the dispersion process can be obtained by incorporating the measured data from multiple sources, including air and soil measurements collected and processed in the IER, as well as data from environmental monitoring stations. This scientific activity will contribute to a deeper understanding of the FDNPP accident, allowing for improved modeling of radiological dispersion and assessment of the potential impacts on the environment and human health. The experience gained during the internship at the IER is of immense value due to its status as a scientific institution that operates on data and possesses experience in dealing with an actual severe nuclear reactor accident that occurred on March 11, 2011. The knowledge and insights obtained from working within an environment that has faced such a severe nuclear crisis are expected to provide a unique perspective and contribute to the enhanced understanding of the challenges associated with radiological emergencies. The opportunity to learn from experts who have dealt with real-life consequences and mitigation strategies resulting from the Fukushima accident is invaluable. The scientific visit will impact increasing competencies related to nuclear safety, which is particularly important for planned development of nuclear technologies in Poland.