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Tytuł pozycji:

Advanced atmospheric 14 C monitoring around the Paks Nuclear Power Plant, Hungary.

Tytuł :
Advanced atmospheric C monitoring around the Paks Nuclear Power Plant, Hungary.
Autorzy :
Varga T; Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Hungarian Academy of Sciences (Atomki), Debrecen, H-4001, P.O Box 51, Hungary; University of Debrecen, Doctoral School of Physics, Debrecen, Hungary. Electronic address: .
Orsovszki G; Isotoptech Ltd, Debrecen, Hungary.
Major I; Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Hungarian Academy of Sciences (Atomki), Debrecen, H-4001, P.O Box 51, Hungary.
Veres M; Isotoptech Ltd, Debrecen, Hungary.
Bujtás T; Paks Nuclear Power Plant, Paks, Hungary.
Végh G; Paks Nuclear Power Plant, Paks, Hungary.
Manga L; Paks Nuclear Power Plant, Paks, Hungary.
Jull AJT; Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Hungarian Academy of Sciences (Atomki), Debrecen, H-4001, P.O Box 51, Hungary; Department of Geosciences, University of Arizona, Tucson, AZ, 85721, USA; University of Arizona AMS Laboratory, Tucson, AZ, 85721, USA.
Palcsu L; Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Hungarian Academy of Sciences (Atomki), Debrecen, H-4001, P.O Box 51, Hungary.
Molnár M; Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Hungarian Academy of Sciences (Atomki), Debrecen, H-4001, P.O Box 51, Hungary.
Pokaż więcej
Źródło :
Journal of environmental radioactivity [J Environ Radioact] 2020 Mar; Vol. 213, pp. 106138. Date of Electronic Publication: 2019 Dec 17.
Typ publikacji :
Journal Article
Język :
English
Imprint Name(s) :
Original Publication: Barking, Essex : Elsevier Applied Science Publishers,
MeSH Terms :
Nuclear Power Plants*
Radiation Monitoring*
Air Pollutants ; Environmental Monitoring ; Hungary ; Wind
Contributed Indexing :
Keywords: CO(2); Hydrocarbon; Modelling; Monitoring; Nuclear power plant; Radiocarbon
Substance Nomenclature :
0 (Air Pollutants)
Entry Date(s) :
Date Created: 20200128 Date Completed: 20200316 Latest Revision: 20200316
Update Code :
20201023
DOI :
10.1016/j.jenvrad.2019.106138
PMID :
31983447
Czasopismo naukowe
Atmospheric air samples were collected at 9 monitoring stations (A1 to A9) less than 2 km from the Paks Nuclear Power Plant (Paks NPP) and a background station (B24). The monthly integrated CO 2 and total carbon (CO 2 +hydrocarbons (C n H m )) samples were collected to determine the excess 14 C activity at the vicinity of the NPP. The measurements providing the 14 C/ 12 C ratio of the monthly integrated samples were carried out on a MICADAS type AMS at HEKAL. Due to the relatively low 14 CO 2 emission of PWR type Paks reactors and the local Suess effect, there was negligible excess 14 C activity at the investigated stations in the pure CO 2 fraction during the investigated 2 years period (2015-2016). On the contrary, there was a detectable (although minor) excess at every station in the C n H m fraction. In case of CO 2 , the average Δ 14 C excess was 3.8‰ and the highest measured value was 91.2‰ at the A3 station in February 2015. In case of C n H m , the average excess was 31.1‰ and the highest measured value was 319.1‰ at the A4 station in February 2016. We applied PC-CREAM 08 modelling to investigate the observed excess 14 C activity at the environmental sampling stations, which depends on the distance from the NPP and the meteorological conditions, such as wind direction and wind speed. Meteorology data was collected at the operating area of the Paks NPP in a meteorology tower. The direct C-14 emission through the 120 m high stacks was measured in the NPP by liquid scintillation counting. These emission data and our model calculations explain the excess activity in the C n H m fraction at the A4 station, which is located only 915 m far from the NPP's stacks in the prevailing wind direction. The excess activity at A3 station (the farthest unit) probably came from the nearby NPP wastewater discharge point. The recently observed average excess and highest excess data is similar to the published data in former studies (Molnár et al., 2007; Veres et al., 1995) on Paks NPP, the highest 14 CO 2 and 14 C n H m excess are just a little higher than it was in the earlier studies, but in these former studies, the A3 station was not equipped with a radiocarbon monitoring unit and the level of radiocarbon emission was almost invisible from the wastewater discharge point.
(Copyright © 2019 Elsevier Ltd. All rights reserved.)

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