Radioactive substances in seawater near Japan nuke plant

Tokyo Electric Power Co. (TEPCO), which operates the quake-hit Japanese nuclear reactors, opened an official Twitter account late Thursday, immediately drawing more than 117,000 followers.

(AP) -- Minuscule amounts of radiation from Japan's stricken nuclear plant have reached the west coast but federal and state officials say it poses no health risk.

If radiation levels continue to rise around Japan's earthquake-hit nuclear facilities, all remaining workers would have to evacuate and attempts to manually cool the reactor could fail, US scientists said Tuesday.

Concerns about possible radiation from Japan's earthquake-damaged Fukushima nuclear power plant sparked a weekend run on iodine tablets as far away as Finland, the country's largest pharmacy chain said Monday.

A radiation monitor in California detected a "minuscule" amount of an isotope from Japan's crippled nuclear power plant, officials said Friday, but insisted it was of no concern.

California is closely watching the crisis at a Japanese nuclear plant, but officials downplayed the threat that a radioactive cloud blown across the Pacific could pose for the US West Coast.

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