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14CO2 dispersion ar...
14CO2 dispersion around two PWR nuclear power plants in Brazil.
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Dias, C M (författare)
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- Stenström, Kristina (författare)
- Lund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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Leao, I L B (författare)
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Santos, R V (författare)
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Nicoli, I G (författare)
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- Skog, Göran (författare)
- Lund University,Lunds universitet,Kvartärgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Quaternary Sciences,Department of Geology,Faculty of Science
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- Ekström, Peter (författare)
- Lund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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da Silveira Correa, R (författare)
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(creator_code:org_t)
- Elsevier BV, 2009
- 2009
- Engelska.
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Ingår i: Journal of Environmental Radioactivity. - : Elsevier BV. - 1879-1700 .- 0265-931X. ; 100:7, s. 574-580
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Atmospheric air samples were taken within 3 km from power plants encompassing five different distances and wind directions. Samples were taken between 2002 and 2005 aiming to evaluate the environmental C-14 enrichment due to the operation of Brazilian nuclear power plants. The sampling system consisted of a pump connected to a trapping column filled with a 3 M NaOH solution. The trapped C-14 by using a single stage accelerator mass spectrometry (SSAMS). CO2 was analyzed for All sampling sites revealed measurable C-14 excess values. The maximum excesses were of 15 and 14 mBq/m(3) for sampling sites placed at NE of the power plants, which is the main wind direction in the area. The mean excesses values were 12 mBq/m(3) to the NE direction, 8 mBq/m to the E, 10 mBq/m to the N, 8 mBq/m(3) to the WNW and 7 mBq/m(3) to the W direction (increasing distances from NE to W). Compared to other Light Water Reactors (LWR) data, these means' values are significantly higher than the average worldwide reported value of 3 mBq/m(3). Available data indicate that the observed values are not related to C-14 emission by the power plants vent stack. Other factors, such as topography, seem to have an important role because it affects wind dispersion thus favoring C-14 accumulation in the sampled area. Moreover, the high elevations around the power plants enhance the chances to measure high values of C-14 since the plume can be intercepted before it is drawn to the ground. Modeling of the plume has shown that its dispersion does not follow a Gaussian model and that agreement between atmospheric CO2 and vegetation C-14 activities occurs only for sampling sites placed at NE of the power plants. (c) 2009 Elsevier Ltd. All rights reserved.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Nyckelord
- Atmospheric air
- C-14
- Nuclear power plant
- PWR
- Dispersion
- plume
- Gaussian
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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