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Monitoring of the carbon-14 in the gaseous releases from the Temelín NPP and its environmental distribution
VALÁŠEK, Michal
This work deals with monitoring of the radiocarbon in the gaseous effluents from the Temelín nuclear power plant and its distribution in the environment. The reader should gain a comprehensive image about level of radiocarbon monitoring in ventilation systems in the Temelín nuclear power plant and in the surrounding environment. The work is divided into several parts. Some basic information of physics, chemistry and radiobiology relating to radiocarbon are given in the first part. The origin of radiocarbon in VVER reactor, its pathway to gaseous releases and then to carbon cycle in the environment are described there too. This introductory part continues with description of monitoring methods used in ventilation systems of the Temelín nuclear power plant and in the surrounding environment. Summary of Czech Republic legislation related to radiation protection is stated. The aim of the work and hypothesis are set in the second part. In the third part there are methods used to fulfil the aim of the work. The results in the form of tables and graphs are in the fourth part. In the following part there is a discussion of summarized data and results. Developed findings are summarized in the last part of this work.
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Monitoring of C-14 and tritium in the environment
Světlík, Ivo ; Michálek, V. ; Tomeš, Marek ; Tomášková, Lenka
In the invited lecture were presented C-14 and tritium time series and actual activity levels of these radionuclides in the environmental components (atmospheric CO2, precipitation, biota). Item there was discussed routines of low level activities measurement of this radionuclides by liquid scintillation spectrometry in the point of view of possible interferences and reduction of real detection levels.
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Stanovení C-14 ve vzorcích listů z okolí jaderných elektráren
Světlík, Ivo ; Tomeš, Marek ; Brabcová, Kateřina ; Michálek, V. ; Tomášková, Lenka
Carbon-14 is a radionuclide with global occurrence and partly natural origin. This radionuclide is a pure beta emitter with half-live 5730 years. The greatest present artificial source of radiocarbon are effluents from nuclear energy facilities, even though it is minor contribution in comparison with natural production. From all radionuclides released by Nuclear Power Plants (NPP) with Light Water Pressurized Reactor (LWPR) during normal operation, radiocarbon is responsible for major collective effective dose. During 2002 and 2003 samples of biota were collected in NPPs Temelín and Dukovany vicinity (both NPPs have only LWPR) and in reference background localities. Received results are compared and discussed in the point of view of NPPs influences on C-14 amount in the environment of close vicinity
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