Post by Joe Neubarth on Dec 29, 2011 13:33:35 GMT -5
Iodine-131 in eastern US from Fukushima Reactor Three explosion may have exceeded EPA limit back in late March.
Measurement of airborne fission products in Chapel Hill, NC, USA from the Fukushima I reactor accident, By S. MacMullin, G.K. Giovanetti, M.P. Green, R. Henning, R. Holmes, K. Vorren, J.F. Wilkerson, Submitted on 17 Nov 2011:
arxiv.org/PS_cache/arxiv/pdf/1111/1111.4141v1.pdf
We first detected airborne fission products in Chapel Hill between 20:00 UTC on March 18, 2011, and 20:00 UTC on March 19, 2011. We measured a maximum activity of 4.2 ± 0.6 mBq/m3 of 131I in the interval between March 29, 2011 and March 30, 2011. [...]
It should be noted that the measured 131I only represents particulate species collected in the air filters. This accounts for only about 50% of the total 131I in the air. The rest is distributed in gases [...]
The maximum activity detected was 4.2 ± 0.6 mBq/m3 of 131I, which did not include a correction for the volatile iodine components. This is below the air activity limit of 7.8 mBq/m3 set by the Environmental Protection Agency [...]
As the study notes, the 4.2 mBq/m3 figure “accounts for only about 50% of the total 131I in the air” as only particulate species were collected. Therefore, around 8.4 mBq/m3 was likely in the air, which exceeds the EPA limit of 7.8 mBq/m3.
Measurement of airborne fission products in Chapel Hill, NC, USA from the Fukushima I reactor accident, By S. MacMullin, G.K. Giovanetti, M.P. Green, R. Henning, R. Holmes, K. Vorren, J.F. Wilkerson, Submitted on 17 Nov 2011:
arxiv.org/PS_cache/arxiv/pdf/1111/1111.4141v1.pdf
We first detected airborne fission products in Chapel Hill between 20:00 UTC on March 18, 2011, and 20:00 UTC on March 19, 2011. We measured a maximum activity of 4.2 ± 0.6 mBq/m3 of 131I in the interval between March 29, 2011 and March 30, 2011. [...]
It should be noted that the measured 131I only represents particulate species collected in the air filters. This accounts for only about 50% of the total 131I in the air. The rest is distributed in gases [...]
The maximum activity detected was 4.2 ± 0.6 mBq/m3 of 131I, which did not include a correction for the volatile iodine components. This is below the air activity limit of 7.8 mBq/m3 set by the Environmental Protection Agency [...]
As the study notes, the 4.2 mBq/m3 figure “accounts for only about 50% of the total 131I in the air” as only particulate species were collected. Therefore, around 8.4 mBq/m3 was likely in the air, which exceeds the EPA limit of 7.8 mBq/m3.
