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Following a major earthquake, a 15-metre tsunami disabled the power supply and cooling of three Fukushima Daiichi reactors, causing a nuclear accident beginning on 11 March 2011. All three cores largely melted in the first three days.

How many explosions were at Fukushima?

three The resultant loss of reactor core cooling led to three nuclear meltdowns, three hydrogen explosions, and the release of radioactive contamination in Units 1, 2 and 3 between 12 and 15 March.

Which reactor exploded in Fukushima?

reactor 4 The explosion, along with a fire touched off by rising temperatures in spent fuel rods stored in reactor 4, led to the release of higher levels of radiation from the plant.

How many nuclear reactors melted down at Fukushima?

Three OKUMA, Japan (AP) — A decade ago, a massive tsunami crashed into the Fukushima Daiichi nuclear power plant. Three of its reactors melted down, leaving it looking like a bombed-out factory. Emergency workers risked their lives trying to keep one of history's worst nuclear crises from spiraling out of control.

Did reactor 2 explode in Fukushima?

Explosion. An explosion was heard after 06:14 JST on 15 March in Unit 2, possibly damaging the pressure-suppression system at the bottom part of the containment vessel. The radiation level was reported as exceeding the legal limit, and the plant's operator started to evacuate all non-essential workers from the plant.

What was worse Chernobyl or Fukushima?

Chernobyl had a higher death toll than Fukushima While evaluating the human cost of a nuclear disaster is a difficult task, the scientific consensus is that Chernobyl outranks its counterparts as the most damaging nuclear accident the world has ever seen.

What was the worst nuclear disaster in history?

Chernobyl Nuclear Disaster Chernobyl Nuclear Disaster The Chernobyl disaster is the worst nuclear power plant accident ever in terms of death toll and cost. The only other Level 7 accident happened on 26 April 1986 when a steam explosion destroyed reactor number four at the Ukrainian plant.

Why was Chernobyl worse than Fukushima?

Chernobyl had a higher death toll than Fukushima The toxic fumes not only contaminated the local vegetation and water supply near Pripyat (a Ukrainian city that was once part of the Soviet Union) but also poisoned nearby residents, some of whom went on to develop cancer.

How long will Fukushima be radioactive?

When the meltdown was occurring, the wind was blowing toward the northwest , contaminating a valley through the mountainous region. These areas still have relatively high radioactivity. The half-life of radiocesium is about 29 years, meaning the quantity of the radioactive material should drop by half by roughly 2041.

How long will Fukushima be uninhabitable?

100 years A large area around the Fukushima nuclear power plant will be uninhabitable for at least 100 years.