scholarly journals Analysis of tritium activity concentrations in urine and internal dose assessment for nuclear power plant workers

2020 ◽  
Author(s):  
Fei Chen ◽  
Xuetao Wang ◽  
Yuwen Li ◽  
Zhen Zhang
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Dose Assessment ◽  
Internal Dose ◽  
Tritium Activity ◽  
Activity Concentrations

scholarly journals Radiocaesium activity concentrations in parmelioid lichens within a 60 km radius of the Fukushima Dai-ichi Nuclear Power Plant

2015 ◽  
Vol 146 ◽  
pp. 125-133 ◽  
Author(s):  
Terumi Dohi ◽  
Yoshihito Ohmura ◽  
Hiroyuki Kashiwadani ◽  
Kenso Fujiwara ◽  
Yoshiaki Sakamoto ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Activity Concentrations

Radiocesium distribution in soils of Tenerife Island (Canary Islands, Spain)

2021 ◽  
Author(s):  
María López Pérez ◽  
Pedro Ángel Salazar Carballo ◽  
María Candelaria Martín Luis ◽  
Francisco Javier Hernández ◽  
Esperanza Liger ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Canary Islands ◽  
Nuclear Power ◽  
Soil Samples ◽  
Dust Storms ◽  
Atmospheric Environment ◽  
Dust Particles ◽  
Additional Contribution ◽  
Activity Concentrations

<p>Tenerife is the largest and most populated island of the Canary Islands; with a surface of 2,034 km<sup>2</sup> and 917,841 inhabitants (in January 2019), it hosts 43% of the total population of the archipelago.</p><p>Large amounts of <sup>137</sup>Cs, an artificial radionuclide with a half-life of 30.2 years, were released into the environment due to the nuclear weapon tests carried out from the 1950s to the 1970s and by nuclear power plant accidents, such as the Chernobyl in 1986. The most recent <sup>137</sup>Cs release into the environment was due to the Fukushima Daiichi Nuclear Power Plant accident, following the earthquake and tsunami of 11 March 2011. Radionuclides released by this accident were measured in air filters collected in the Canary Islands despite the tremendous distance to the source (López-Pérez et al., 2013).</p><p>In this work, we provide the concentrations of <sup>137</sup>Cs measured in 73 soil samples collected in 2013 in Tenerife. Besides, a second dataset of <sup>137</sup>Cs concentrations recorded in 103 soil samples collected in 1991 (22 years before) have been used to provide information on the spatial and temporal variability of this anthropogenic radionuclide at this site.</p><p>In both surveys, sampling sites were randomly selected on a predefined 3x3 km sampling grid covering the whole island and superficial samples were collected from uncultivated fields. Radiometric measurements were performed by gamma spectrometry with a coaxial-type germanium detector (Canberra Industries Inc., USA). The activity concentration of <sup>137</sup>Cs was directly measured by its gamma-ray photopeak at 661.65 KeV. The Minimum Detectable Activity was 0.08 Bq kg<sup>-1</sup>.</p><p><sup>137</sup>Cs activity concentrations in the 1991 survey ranged from 0.08 to 100.90 Bq kg<sup>-1</sup> and from 0.08 to 88.85 Bq kg<sup>-1</sup> in 2013. Comparing the results of both campaigns, <sup>137</sup>Cs activity concentrations were found to be rather similar, despite the 22 years gap between the measurements. We believe that, in addition to the <sup>137</sup>Cs atmospheric fallout, there is an additional contribution to the inventory of this radionuclide in the soils of this island produced by the deposition of <sup>137</sup>Cs-loaded dust particles frequently transported from the Sahara Desert as dust storms (Karlsson et al, 2008).</p><p>In terms of radiological risk, in some few locations, the contribution to the outdoor gamma absorbed dose from the <sup>137</sup>Cs activity concentrations present in the soils were as high as 50%. Therefore, it is important to identify the various sources of this radionuclide to the studied sites in order to enhance the understanding of the radiological hazard produced by this man-made radionuclide.</p><p><strong>References:</strong></p><p>Karlsson L, Hernandez F, Rodríguez S, López-Pérez M, Hernandez-Armas J, Alonso-Pérez S, Cuevas, E. (2008). Using <sup>137</sup>Cs and <sup>40</sup>K to identify natural Saharan dust contributions to PM10 concentrations and air quality impairment in the Canary Islands. Atmospheric Environment, 42: 7034-7042</p><p>López-Pérez M, Ramos-López R, Perestelo NR, Duarte-Rodriguez X, Bustos JJ, Alonso-Pérez S, E. Cuevas, J. Hernández-Armas. (2013). Arrival of radionuclides released by the Fukushima accident to Tenerife (Canary Islands). Journal of Environmental Radioactivity, 116: 180-186</p>

scholarly journals STUDIES OF 137CS TRANSFER IN SOIL‐FERN SYSTEM

2005 ◽  
Vol 13 (3) ◽  
pp. 97-102 ◽  
Author(s):  
Donatas Butkus ◽  
Marina Konstantinova
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Transfer Factor ◽  
Nuclear Power ◽  
Activity Concentration ◽  
Root Systems ◽  
137Cs Activity ◽  
Chernobyl Nuclear Power Plant ◽  
Activity Concentrations ◽  
Better Than

Fern accumulates radionuclides in abundance, including 137Cs. Tranfer of 137Cs and 40K in plants which have different root systems (fern or grass), or have no roots at all (moss) was compared. Samplings were performed in regions contaminated with 137Cs after Chernobyl Nuclear Power Plant (ChNPP) accident in 1994 and 1997–2000. The male fern (Dryopteris filix‐mas) most prevailing in Lithuania was studied. Fern accumulates 137Cs more effectively than grass or moss. The average 137Cs activity concentration in fern is 180±60 Bq kg−1 and the transfer factor is 0,074 m2kg−1. The fern stipe accumulates 137Cs most of all (200±90 Bqkg‐1), the transfer factor is 0,087 m2 kg−1. Accumulation of 137Cs is influenced by the content of K in the soil. 137Cs and 40K activity concentrations in fern are higher than those in the soil what shows that fern accumulates 137Cs better than 40K. Fern can clean the soil because this plant accumulates radionuclides in its stipe rather than roots.

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