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- Title
FEATURES OF THE THERMAL PLUTONIUM EFFECT AND DYNAMICS OF THE ACCIDENT AT UNIT III OF THE FUKUSHIMA 1 NUCLEAR POWER PLANT.
- Authors
V. A., Tarasov; S. A., Chernezhenko; I. B., Korduba; V. N., Vashchenko
- Abstract
Before the Fukushima Daiichi Nuclear Power Plant (NPP) accident, the prospect of expanding the nuclear power plants fuel base was also associated with the use of MOX fuel (mixed oxide uranium-plutonium fuel). The Fukushima Daiichi nuclear accident, which has led to the reactor core meltdown, revealed an insufficient knowledge of the fuel nuclides temperature properties in a temperature range wider than the operating temperatures ranges of existing reactors (above 1000 K). The paper presents the results of calculating the temperature dependences of the fission and radiative capture nuclear reactions cross-sections averaged over the thermal neutron spectrum for uranium 238, uranium 235 and plutonium 239. A fundamental difference in the temperature dependences of the uranium 235 and plutonium 239 nuclear reactions cross sections averaged over the thermal neutron spectrum is found and explained for the studied temperature range. The temperature dependences of the heat sources densities for MOX fuel and uranium oxide fuel for thermal reactors are calculated as well. For the first time, the fundamental difference between the temperature dependences of the heat sources densities for the MOX fuel and uranium oxide fuel is shown. The accident dynamics theory based on the fundamental difference in the temperature dependences of the heat sources densities for the MOX fuel and oxide uranium fuel is presented. It allows to identify and explain several characteristic temperature features of the accident dynamics at the Fukushima Daiichi Nuclear Power Plant Unit 3, where one third of the reactor fuel load was MOX-fuel.
- Subjects
FUKUSHIMA-shi (Japan); FUKUSHIMA Daiichi Nuclear Power Plant (Japan); NUCLEAR power plants; PLUTONIUM; NEUTRONS; TEMPERATURE; URANIUM as fuel; DENSITY; NUCLEAR fuels; NUCLEAR cross sections; URANIUM oxides; RADIOACTIVE fallout; NUCLEAR reactors
- Publication
German International Journal of Modern Science / Deutsche Internationale Zeitschrift für Zeitgenössische Wissenschaft, 2023, Issue 61, p48
- ISSN
2701-8369
- Publication type
Article
- DOI
10.5281/zenodo.8204601