Rather, progressive heating, oxidation and meltdown of the cores occurred over a much longer period of time. At Fukushima, there were no explosions within the cores.As a result, radioactivity had a direct open path to the environment, enhanced by entrainment in the smoke from the burning graphite. The release was not confined because that type of reactor did not have a containment structure as designed in all U.S. In Chernobyl, the release started with a nuclear criticality accident which triggered an in-core steam explosion, causing an intensive ejection of the overheated core material and extensive burning of graphite and reactor materials over a long period of time.According to the International Atomic Energy Agency (IAEA), there was less total atmospheric release of radioactivity from the Fukushima accident compared with Chernobyl due to the different accident scenarios and mechanisms of radioactive releases.It released about 10 times the radiation that was released after the Fukushima accident. The accident at Chernobyl stemmed from a flawed reactor design and human error.
#NUCLEAR REACTOR MELTDOWN JAPAN 2011 SERIES#
The accident at Fukushima occurred after a series of tsunami waves struck the facility and disabled systems needed to cool the nuclear fuel.However, the accidents were starkly different in their cause, the governments’ response and health effects. This fact netted both accidents the highest rating on the International Nuclear and Radiological Event Scale (INES). Both the 2011 accident at the Fukushima Daiichi nuclear energy facility in Japan and the Chernobyl accident in the former Soviet Union in 1986 required countermeasures to protect the public.
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