Meltdown At Nuclear Plant

Radiation levels across the Pacific Ocean are rapidly returning to normal five years after a meltdown at the Fukushima nuclear plant spewed gases and liquids into the sea, a study showed Monday.

The operator of a Japanese nuclear plant that went into a tsunami-triggered meltdown knew the risks from highly radioactive water at the site but sent in crews without adequate protection or warnings, a worker said in a legal complaint.

As Japan marks the first anniversary of the quake-tsunami that triggered meltdowns at the Fukushima nuclear plant, here are key developments in the worst atomic accident since Chernobyl in 1986.

Japan says it will soon require atomic reactors to be shut down after 40 years of use to improve safety following the nuclear crisis set off by last year's tsunami. Concern about aging reactors has been growing because the three units at the Fukushima Dai-ichi plant in northeastern Japan that went into meltdown following the tsunami in March were ...

Water levels dropped precipitously Monday inside a stricken Japanese nuclear reactor, twice leaving the uranium fuel rods completely exposed and raising the threat of a meltdown, hours after a hydrogen explosion tore through the building housing a different reactor.Water levels were restored after the first decrease but the rods remained exposed la...

The risk of partial meltdown at a stricken nuclear power plant in Japan increased on Monday as cooling systems failed at a third reactor, possibly exposing its fuel rods, only hours after a second explosion at a separate reactor blew the roof off a containment building. (Read: Second explosion at Fukushima nuclear plant)The widening problems unders...

Three days after a massive earthquake and tsunami, the Japanese authorities were still struggling on Sunday to avoid full meltdowns at a plant with two stricken reactors on Japan's coast. (See Pics: Japan quake triggers Tsunami)As of Sunday night, technicians' increasingly desperate measures to keep the reactors from overheating, and possibly melti...

A nuclear power plant affected by a massive earthquake is facing a possible meltdown, an official with Japan's nuclear safety commission said Saturday.Ryohei Shiomi said that officials were checking whether a meltdown had taken place at the Fukushima Daiichi power plant's Unit 1, which had lost cooling ability in the aftermath of Friday's powerful ...

Radiation levels across the Pacific Ocean are rapidly returning to normal five years after a meltdown at the Fukushima nuclear plant spewed gases and liquids into the sea, a study showed Monday.

The operator of a Japanese nuclear plant that went into a tsunami-triggered meltdown knew the risks from highly radioactive water at the site but sent in crews without adequate protection or warnings, a worker said in a legal complaint.

As Japan marks the first anniversary of the quake-tsunami that triggered meltdowns at the Fukushima nuclear plant, here are key developments in the worst atomic accident since Chernobyl in 1986.

Japan says it will soon require atomic reactors to be shut down after 40 years of use to improve safety following the nuclear crisis set off by last year's tsunami. Concern about aging reactors has been growing because the three units at the Fukushima Dai-ichi plant in northeastern Japan that went into meltdown following the tsunami in March were ...

Water levels dropped precipitously Monday inside a stricken Japanese nuclear reactor, twice leaving the uranium fuel rods completely exposed and raising the threat of a meltdown, hours after a hydrogen explosion tore through the building housing a different reactor.Water levels were restored after the first decrease but the rods remained exposed la...

The risk of partial meltdown at a stricken nuclear power plant in Japan increased on Monday as cooling systems failed at a third reactor, possibly exposing its fuel rods, only hours after a second explosion at a separate reactor blew the roof off a containment building. (Read: Second explosion at Fukushima nuclear plant)The widening problems unders...

Three days after a massive earthquake and tsunami, the Japanese authorities were still struggling on Sunday to avoid full meltdowns at a plant with two stricken reactors on Japan's coast. (See Pics: Japan quake triggers Tsunami)As of Sunday night, technicians' increasingly desperate measures to keep the reactors from overheating, and possibly melti...

A nuclear power plant affected by a massive earthquake is facing a possible meltdown, an official with Japan's nuclear safety commission said Saturday.Ryohei Shiomi said that officials were checking whether a meltdown had taken place at the Fukushima Daiichi power plant's Unit 1, which had lost cooling ability in the aftermath of Friday's powerful ...