When a plant for nuclear power (breaking atoms in fission) explodes because of a malfunction within the pipes as the nuclear reaction takes place. It super-heats, explodes, and often shoots dangerous gases into the air for days, even weeks, that can cause radiation poisoning among other problems.
Timeline of the Fukushima nuclear accidents happened in 2011.
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Between 1945 and 1987, there were 285 nuclear reactor accidents, injuring over 1,550 people and killing 64.
Three major nuclear accidents; namely:Three Miles Islands nuclear accident, USA, March 1979Chernobyl nuclear accident, Ukraine (former Soviet Union), April 1986Fukushima nuclear accident, Japan, March 2011
Thankfully there haven't been many nuclear accidents, however when they do happen they can be severe the worst nuclear accident/disaster was the explosion of reactor No.4 at the Chernobyl Nuclear power plant in 1986 on April the 26th.
Nuclear power accidents are a disaster. The 1986 nuclear accident at the Chernobyl Nuclear Power Plant in Ukraine was a catastrophic accident.
Yes, quite a few, most totally minor industrial accidents not even having anything to do with the reactor.
Those reactions that take place in functioning nuclear reactors (i.e not Chernobyl or Fukushima when the accidents happened).
No, excepting of course some important accidents.
Some industrial accidents are accidental release of chemical during production, explosions, nuclear explosion and radiation, pollution, construction accidents and even mine explosions to name a few.
A nuclear accident is the unintended release of nuclear radiation into the environment, such as damage to a nuclear reactor or to a nuclear weapon (plane crash carrying nuclear bombs, etc). The two basic forms of nuclear weapons are fission and fusion weapons.
Read the report on Chernobyl referenced below