Monday, April 15, 2013

Tepco admitted Pu-238/239/240, Sr-90 in sea soil are from Fukushima accident

Tepco admitted Pu-238/239/240, Sr-90 in sea soil are from Fukushima accident:
According to Tepco, significantly high level of radioactive material was measured from the sea soil.
The sample is dry soil taken offshore reactor1 water intake canal (0~10cm depth). The sampling date was 7/23/2012.
Tepco has been concealing the data for over 8 months.

Cs-134 : 360,000 Bq/Kg
Cs-137 : 540,000 Bq/Kg
Pu-238 : 0.21 Bq/Kg
Pu-239/240 : 1.2 Bq/Kg
Sr-90 : 73 Bq/Kg

About this measurement, Tepco commented like this below,
The density of Pu-238 and Pu-239+240 are supposed to originate from the accident this time for the following reason.

- Pu-238 which had not been detected at the offshore of the power plant was detected this time.

- The densities of Pu-239+240 is higher than that of the range of past measurement values in the sea area near 1F and 2F.
The density of Sr-90 are higher than those of the range of past measurement values in the sea area near 1F and 2F. Therefore, there is a possibility that the higher densities originate from the accident this time.

Tepco admitted Pu-238/239/240, Sr-90 in sea soil are from Fukushima accident

2 Tepco admitted Pu-238/239/240, Sr-90 in sea soil are from Fukushima accident

http://www.tepco.co.jp/en/nu/fukushima-np/f1/smp/2013/images/ocean_soil_130415-e.pdf


 
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