Bulletin KRASEC. Phys. & Math. Sci, 2015, V. 10, №. 1, pp. 59-65. ISSN 2313-0156
THE DEVELOPMENT OF RADIATION MONITORING TECHNOLOGY FOR URBAN ENVIRONMENT
V.S. Yakovleva¹, P.M. Nagorskiy²
¹National Research Tomsk Polytechnic University, 634050, Tomsk, Lenin st., 30 Russia
²Institute of Monitoring of Climatic and Ecological Systems SB RAS, 634055, Tomsk, Akademicheskaya st., 10 / 3., Russia.
The results of monitoring of meteorological and radiation parameters in Tomsk Observatory of Radioactivity and Ionizing Radiation are presented and analyzed in this work. The advantages of new radiation monitoring technology including the investigation of radiation parameters vertical profiles are presented. The existing models of soil and atmosphere radon isotopes transport were verified for urban environment according to the analysis results of radiation monitoring data. The verification showed that the existing models do not allow describing some experimentally obtained dependences and require further development. For instance, it was experimental obtained that alpha-radiation flux density increases for some times with height up to 25 m and then is practically unchanged up to 35 m. The same is for radon. The explanation of such dependence in radon behavior is the influence of urban infrastructure. It was also experimental obtained that diurnal variations of soil radon volumetric activity measured by alpha- and beta-radiation decrease with depth until fully amplitude losses, but the moments of maximums (minimums) occur with time delay. Such behavior is dependent on thermophysical properties of soil and local meteorological conditions. It was proposed to describe the soil gas advection velocity by a function considering the soil thermal conductivity and the dependence of soil temperature on depth.
Key words: radiation monitoring, technology, ionizing radiation, radon, soil, atmosphere.
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Original article submitted: 25.05.2015
Yakovleva Valentina Stanislavovna — Dr. Sci. (Tech.), Associate Professor, Professor of Dep. Applied Physics, National Research Tomsk Polytechnic University, Tomsk.
Nagorskiy Petr Mikhailovich – Dr. Sci. (Phys. & Math.), Professor, Leading Researcher of Lab. Physics of Climate Control Systems, Institute of Monitoring of Climatic and Ecological Systems SB RAS, Tomsk.
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