What happens in an accident in a nuclear power plant?

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What happens in an accident in a nuclear power plant?
The reactor of a nuclear power plant contains radioactive substances that are very dangerous for human beings. Such plants are monitored very carefully. If a technical fault goes unnoticed there can be uncontrolled chain reactions in the reactor. A nuclear power plant uses uranium fuel to produce steam for generating electricity. This process changes uranium into other radioactive materials. If a nuclear power plant accident occurs, heat and pressure build-up, and the steam, along with the radioactive materials, may be released. The internal pressure rises enormously within a few minutes and there is an explosion. This is exactly what happened in 1986 in Chernobyl, an Nuclear power plant in Ukraine. A huge cloud of radioactive substances formed over Europe; it first settled over the Scandinavian countries and then traveled to the Mediterranean countries via Poland and Germany. The radioactive substances reached the soil through the rain. People, who switched off the reactor and later cleaned up the area, died from the effects of radiation.

Видео What happens in an accident in a nuclear power plant? канала Booksopher