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.

Nuclear radiation can be both friend and foe. It is used in various medical applications, such as cancer treatment and diagnostic imaging. On the other hand, exposure to high levels of nuclear radiation can be harmful and have detrimental effects on human health and the environment, as seen in nuclear accidents like Chernobyl and Fukushima.

None due to radiation, but there must have been a few due to normal industrial accidents.

The easiest way is to paint the surfaces white or a highly reflective (e.g. silver) color.

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.