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Fukushima workers' exposure tops 650mSV

Detailed tests have found that 2 workers who were exposed to radiation at the crippled Fukushima nuclear plant received doses of more than twice the government-mandated emergency limit.

The men in their 30s and 40s were each found in early June to have been exposed to over 250 millisieverts -- the new higher limit for exposure that the government introduced after problems began at the Fukushima Daiichi plant.

The National Institute of Radiological Sciences conducted 2 more rounds of detailed tests to measure the amount of radioactive iodine and cesium the 2 men could have inhaled.

After analyzing the men's work shifts since the March 11th disaster, the Institute concluded that the man in his 30s was exposed to 678 millisieverts, and the man in his 40s, 643 millisieverts. Internal exposure accounted for more than 80 percent of the figures.

The 2 men were on duty in the central control rooms of reactors No.3 and No.4. They have told the health and labor ministry that they don't remember whether they wore protective masks or not when a hydrogen explosion occurred at the No.1 reactor on March 12th.

The Institute said separately that it is conducting detailed tests on another Fukushima worker in his 50s, who could have received a radiation dose above the emergency limit.

Friday, June 10, 2011 19:45 +0900 (JST)
www3.nhk.or.jp

@lilly - ideally we need to do a frame by frame analysis of the video to isolate the flashes. The flashes didn't look to my eyes localised enough to be sparks.

@hudebnik Just tell me where you want the raw unedited video uploaded to...

Thanks WolfDK for taping!

@hudebnik The flashes are portable torch lights. They switch on to see something.

I saw the camera shaking

@lillymunster The video is accelerated, it's a lapsetime

I have saw the lights in a real time, It was normal torchs pointing a where they like to point.

@Angie Hi! It's been a smoky steamy morning!

Woods Hole Daily Updates :

@xxx Looks like dark smoke to me

I agree

Its definitely not just
steam

3 is still active as well, but most of the smoke/steam is obscured by the stack near 1.

@LM : there is no corium in #4, i have no idea what should cause dark smoke in #4.

Burning SFP

But I also think that there is something in core...

Woods Hole Oceanographic Institution's Daily Updates :
June 10
Lines in the Water -
"It’s possible, therefore, that the blips we see in the salinity, temperature, and oxygen data are either water from the northern mid-Pacific being mixed in by the movement of the Kuroshio through the open ocean. More crucial to this cruise, however, is the possibility that it could be a signature of surface water that traveled down the northern coast of Japan with the Oyashio current, past Fukushima, and then out to us along the Kuroshio.

If it is, we should be able to see signs of radium in the samples we’ve taken from those depths. Radium is a naturally occurring radioactive element that only comes from sources on land, including ground water flowing into the ocean. So if we see both radium (which we can test for on board) and cesium-134 and -137, then it’s a good bet we’re on the right track." www.whoi.edu