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The residual heat and  fission reactions caused by the failure of safety systems and backup generators after natural disaster in Fukushima Daiichi accident caused an explosion in the power plant. In this article, the energy that causes the explosion is calculated and the possible negative effects of this energy is explained. The number of fusions required to obtain W energy has been found to be able to calculate the energy released by fission reactions within three days in the reactors in the three units that have been disabled due to natural disaster at the cooling system of the Fukushima Daiichi nuclear power plant. Then, the mass of U-235, which is calculated based on the amount of energy production of 2020 MW / h for three reactors, was calculated by calculating the mass of U-235 which should be used to form this energy, and after 67 hours, uncontrolled energy in the environment was calculated to evaluate the results. According to the calculations, an energy consumption of 3,4273 kg U-235 resulted in 2028 MW / h energy and in joule it was found to be 2028000 Kj/h. It was explained how this energy caused the explosion in the plant. This research; it is aimed to contribute to the future studies and to take measures against the situations that cause the explosion in nuclear power plants.

afet ve risk dergisi :

Nükleer Santrallerde Yangın Güvenliği Açısından Reaktör Soğutmanın Önemi ve Fukuşima Daiichi Kazası Modeli Üzerinden Kontrol Dışı Gerçekleşen Fisyon Reaksiyonlarının Enerjisinin Hesaplanması