Nuclear and radiation accidents and incidents involving HEU or plutonium trafficking: A nuclear meltdown is a severe nuclear reactor accident that results in reactor core damage from overheating. It has been defined as the accidental melting of the core of a nuclear reactor, and refers to the core's either complete or partial collapse. A core melt accident occurs when the heat generated by a nuclear reactor exceeds the heat removed by the cooling systems to the point where at least one nuclear fuel element exceeds its melting point. This differs from a fuel element failure, which is not caused by high temperatures. A meltdown may be
Chain of events (accident analysis) a chain of events and errors can be identified leading up to the crash. Pilot error, communications problems, fog, and airfield congestion (due to a bomb threat and explosion at another airport) all contributed to this catastrophe. Chain of events (accident analysis) In accident analysis, a chain of events (or error chain) consists of the contributing factors leading to an undesired outcome. In aviation accidents and incidents, these contributing actions typically stem from human factor-related mistakes and pilot error, rather than mechanical failure. A study conducted by Boeing found that 55% of airline accidents between 1959 and 2005 were caused