Radiation level spikes further near toxic water tanks at Japan's Fukushima plant

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Story highlights

  • TEPCO says it measured radiation of 2,200 millisieverts at the plant
  • The reading came from near a tank holding contaminated water
  • The previous highest reading around that tank was 1,800 millisieverts on Saturday
  • Those levels are strong enough to kill an unprotected person within hours

Radiation readings near tanks holding toxic water at Japan's crippled nuclear power plant have jumped to a new high, the plant operator said Wednesday.

Tokyo Electric Power Company, which has been struggling to deal with a series of leaks at the Fukushima Daiichi nuclear plant, said it detected a radiation level of 2,200 millisieverts near the tanks on Tuesday. That's up from a previous high of 1,800 millisieverts on Saturday.

Those levels, detected around the same tank, are strong enough to kill an unprotected person within hours. But TEPCO said the type of radiation is easy to shield against.

How did we get to this point?

The announcement of the increased reading came a day after the Japanese government officially stepped into the effort to deal with the contaminated water crisis at the Fukushima plant, which was severely damaged by the massive earthquake and tsunami that struck northeast Japan in March 2011.

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Nuclear expert: TEPCO not in control
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The government said Tuesday that it would spend the equivalent of $470 million on measures that included an ambitious plan to freeze the ground surrounding the plant's stricken reactors to prevent the contamination of groundwater at the site.

TEPCO has accumulated a vast volume of tainted water in roughly 1,000 huge storage tanks at the site, some of them hastily assembled in the aftermath of the tsunami.

More leaks feared at Fukushima

And the amount of radioactive water at the plant keeps growing day by day, as groundwater seeps in and the company pumps liquid around the damaged reactors to keep them cool.

Last month, TEPCO said one of the tanks at the site had leaked 300 tons of toxic water, prompting Japan's nuclear regulator to declare the situation a Level 3 serious incident, its gravest assessment since the reactor meltdowns at the plant in 2011.

TEPCO looks for outside help to stabilize crippled Fukushima nuclear plant

The nuclear watchdog, the Nuclear Regulation Authority, said this week that the recent high radiation readings have raised suspicions of more leaks from other water containers.

TEPCO said Wednesday that it hadn't found any leaks from this tank and that the cause of the high radiation reading was under investigation.

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      • This photo taken on August 6, 2013 shows local government officials and nuclear experts inspecting a facility to prevent seeping of contamination water into the sea at Tokyo Electric Power's (TEPCO) Fukushima Dai-ichi nuclear plant in Okuma, Fukushima prefecture.

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      • Japan's nuclear watchdog members, including Nuclear Regulation Authority members in radiation protection suits, inspect contaminated water tanks at the Tokyo Electric Power Co (TEPCO) Fukushima Dai-ichi nuclear power plant in the town of Okuma, Fukushima prefecture on August 23, 2013. Japan's nuclear watchdog dispatched an inspection team to the crippled Fukushima plant after workers found a huge toxic water leak and unexplained radiation hotspots. Earlier this week around 300 tonnes of radioactive liquid is believed to have escaped from one of the hundreds of tanks that hold polluted water, some of which was used to cool the broken reactors, in an episode dubbed the most serious in nearly two years. JAPAN OUT AFP PHOTO / JAPAN POOL via JIJI PRESS (Photo credit should read JAPAN POOL/AFP/Getty Images)

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