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Kinetics of 3H, 90Sr and 137Cs content changes in hydrosphere in the Vltava River system (Czech Republic)

E. Hanslík, D. Marešová, E. Juranová, B. Sedlářová,

. 2018 ; 188 (-) : 1-10. [pub] 20171206

Jazyk angličtina Země Anglie, Velká Británie

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/bmc18024455

The paper presents results and interpretation of long-term monitoring of occurrence and behaviour of radioisotopes 3H, 90Sr, and 137Cs in the vicinity of the Temelín Nuclear Power Plant. 3H, 90Sr, and 137Cs originate predominantly from residual contamination due to atmospheric nuclear weapons tests and the Chernobyl disaster in the last century. Monitoring of radionuclides comprised surface waters, river sediments, aquatic plants, and fish. This enables an up-to-date appraisal of the Temelín Nuclear Power Plant impact on the hydrosphere in all indicators at standard power plant operation, as well as at critical situations. The time and spatial variability of these radionuclide concentrations were monitored in the hydrosphere at in- and out-flow of the Orlík Water Reservoir. The basic evaluated radioecological characteristics can be used in assessing the long-term kinetics of decline and behaviour of radionuclides and their potential release into the environment. A very slow decline in 3H concentration at unaffected sites was observed. At sites downstream from the power plant the 3H concentrations were significantly higher, an evident impact of the power plant operation. A decline in 90Sr and 137Cs concentrations was observed in all the monitored indicators. Also, the characteristic effective and ecological half-lives were evaluated.

Citace poskytuje Crossref.org

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$a The paper presents results and interpretation of long-term monitoring of occurrence and behaviour of radioisotopes 3H, 90Sr, and 137Cs in the vicinity of the Temelín Nuclear Power Plant. 3H, 90Sr, and 137Cs originate predominantly from residual contamination due to atmospheric nuclear weapons tests and the Chernobyl disaster in the last century. Monitoring of radionuclides comprised surface waters, river sediments, aquatic plants, and fish. This enables an up-to-date appraisal of the Temelín Nuclear Power Plant impact on the hydrosphere in all indicators at standard power plant operation, as well as at critical situations. The time and spatial variability of these radionuclide concentrations were monitored in the hydrosphere at in- and out-flow of the Orlík Water Reservoir. The basic evaluated radioecological characteristics can be used in assessing the long-term kinetics of decline and behaviour of radionuclides and their potential release into the environment. A very slow decline in 3H concentration at unaffected sites was observed. At sites downstream from the power plant the 3H concentrations were significantly higher, an evident impact of the power plant operation. A decline in 90Sr and 137Cs concentrations was observed in all the monitored indicators. Also, the characteristic effective and ecological half-lives were evaluated.
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