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The term nuclear meltdown is not officially defined by the International Atomic Energy Agency [3] or by the United States Nuclear Regulatory Commission. [4] It has been defined to mean the accidental melting of the core of a nuclear reactor, [5] however, and is in common usage a reference to the core's either complete or partial collapse.
The combustion chamber (A) is filled intermittently with an air–fuel mixture supplied by the gas chamber (C) and the air chamber (B). The air–fuel mixture is ignited by a spark after which the explosion of the mixture causes an increase in pressure throwing open the nozzle valve (F), allowing the compressed gases to flow through the nozzle ...
The Fukushima nuclear accident was a major nuclear accident at the Fukushima Daiichi Nuclear Power Plant in Ōkuma, Fukushima, Japan, which began on 11 March 2011. The proximate cause of the accident was the 2011 Tōhoku earthquake and tsunami , which resulted in electrical grid failure and damaged nearly all of the power plant's backup energy ...
Oil fumes, natural gas, propane, coal, or any other fuel can build up inside the combustion chamber. This is especially of concern when the vessel is hot; the fuels will rapidly volatilize due to the temperature. Once the lower explosive limit (LEL) is reached, any source of ignition will cause an explosion of the vapors.
The combustion chamber of the Velox could produce flue gasses by burning fuel gasses or heavy fuel oil. Blast furnace gas was typically used as fuel by Velox sets installed in steel mills. Efficiency of Velox steam generators was generally around 88—90% when burning blast furnace gas and 91—93% per cent with fuel oil.
The effects of a nuclear explosion on its immediate vicinity are typically much more destructive and multifaceted than those caused by conventional explosives.In most cases, the energy released from a nuclear weapon detonated within the lower atmosphere can be approximately divided into four basic categories: [1]
This is the largest oil spill of its kind (spill from an oil tanker) in history. January 8, 1979: Betelgeuse incident, a French constructed oil tanker which entered Bantry Bay, Ireland, exploded and killed 50 people, the disaster also caused extensive harbor damage. March 28, 1979: Three Mile Island accident. Partial nuclear meltdown.
[119] [120] 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.