Beta ray but still a bad incident...

Fukushima plant workers exposed to radiation

The operator of the Fukushima Daiichi nuclear power plant says 6 of its workers were exposed to radiation on Wednesday morning due to a contaminated water leak caused by human error.

Tokyo Electric Power Company said on Wednesday evening that the workers had been decontaminated and that it will step up efforts to prevent a recurrence.

It says the workers mistakenly detached a water pipe from a joint near a desalination device at around 9:30 AM.

The accident caused about 7 tons of contaminated water to leak for about an hour. TEPCO says the water is contained inside a 60-meter-long, 12-meter-wide barrier that surrounds the device.

The water is highly radioactive, containing 34 million becquerels of beta ray-emitting material per liter.

Six of 11 workers at the site were sprayed with the radioactive water.
[link to www3.nhk.or.jp]
.