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Estimating exposure to extremely low frequency magnetic fields near high-voltage power lines and assessment of possible increased cancer risk among Slovenian children and adolescents Cover

Estimating exposure to extremely low frequency magnetic fields near high-voltage power lines and assessment of possible increased cancer risk among Slovenian children and adolescents

Open Access
|Jan 2023

Figures & Tables

Figure 1

Points in 1m grid for two spans of a power line are shown with blue and black dots in which the program determined the values of the extremely low-frequency (ELF) magnetic fields (MF). Red circles represent the final 10 mgrid for which the final results were generated.
Points in 1m grid for two spans of a power line are shown with blue and black dots in which the program determined the values of the extremely low-frequency (ELF) magnetic fields (MF). Red circles represent the final 10 mgrid for which the final results were generated.

Figure 2

Comparison of results obtained by all four algorithms to determine total value of extremely low-frequency (ELF) magnetic fields (MF) for a case of crossing of two 2×110 kV power lines of type barrel under the nominal load of 650 A. The color scale shows the deviation of the estimated value of ELF MF values determined by all four new algorithms from the actual value of ELF MF determined by the usual numerical modeling procedure. The black contours represent the limits of 0.1, 0.4 and 1.0 μT for the actual values, and the red contours for the estimated values.
Comparison of results obtained by all four algorithms to determine total value of extremely low-frequency (ELF) magnetic fields (MF) for a case of crossing of two 2×110 kV power lines of type barrel under the nominal load of 650 A. The color scale shows the deviation of the estimated value of ELF MF values determined by all four new algorithms from the actual value of ELF MF determined by the usual numerical modeling procedure. The black contours represent the limits of 0.1, 0.4 and 1.0 μT for the actual values, and the red contours for the estimated values.

Figure 3

The daily, monthly, yearly and total (1. 1. 2006 – 31. 12. 2017) mean values of the load of a 400 kV power line with the highest mean values in Slovenia.
The daily, monthly, yearly and total (1. 1. 2006 – 31. 12. 2017) mean values of the load of a 400 kV power line with the highest mean values in Slovenia.

Figure 4

Example of the total value of the extremely low-frequency (ELF) magnetic fields (MF) of several high voltage power lines around distribution transformer stations for nominal load in the area of the capital city of Ljubljana (approximately 5 x 2.7 km).
Example of the total value of the extremely low-frequency (ELF) magnetic fields (MF) of several high voltage power lines around distribution transformer stations for nominal load in the area of the capital city of Ljubljana (approximately 5 x 2.7 km).

Comparison of the calculated and measured value of the extremely low frequency magnetic field for 400 kV power line with the highest mean load

Location12345
Calculated value [μT]7.43.83.09.13.4
Measured value [μT]7.33.44.112.32.7

The distances from the 400 kV power line with the highest mean load, at which the value of the extremely low frequency magnetic field falls below 0_1, 0_2, 0_3 and 0_4 μT, respectively

DistanceB = 0.1 μTB = 0.2 μTB = 0.3 μTB = 0.4 μT
Nominal load340 m238 m193 m167 m
Highest daily mean load (2164 A, 23. 11. 2010)303 m212 m172 m149 m
Highest weekly mean load (1987A, 22. – 28.11.2010)290 m203 m165 m143 m
Highest monthly mean load (1588 A, 11. 2010)258 m181 m147 m127 m
Highest yearly mean load (842A, 2016)187 m131 m107 m92 m
Total mean load (742 A, 1. 1. 2006 – 31. 12. 2017)175 m123 m99 m87 m

The proportion of Slovenian population of children and adolescents in 2005–2016, observed and expected number of cancer cases, and standardized incidence ratio with 95% confidence interval for all cancers combined (age 0–14 years), leukemia (age 0–19 years) and brain tumors (age 0–29 years) are presented according to five categories of ELF MF exposure

< 0.1 mT0.1–0.2 mT0.2–0.3 mT0.3–0.4 mT≥ 0.4 mT
Population* (proportion)99.5 %0.2 %0.1 %0.1 %0.1 %
All cancers (age 0–14 years)
Observed number of cases5160000
Expected number of cases513.61.10.60.30.5
Standardized (95% confidence incidence interval) ratio1.0 (0.9–1.1)no casesno casesno casesno cases
Leukemia (age 0–19 years)
Observed number of cases1941000
Expected number of cases194.10.40.20.10.2
Standardized interval) incidence ratio (95% confidence1.0 (0.9–1.2)2.4 (0.1–13.3)no casesno casesno cases
Brain tumors (age 0–29 years)
Observed number of cases1950100
Expected number of cases178.40.40.20.10.2
Standardized interval) incidence ratio (95% confidence1.0 (0.9–1.2)no cases4.6 (0.1–25.4)no casesno cases
DOI: https://doi.org/10.2478/raon-2023-0002 | Journal eISSN: 1581-3207 | Journal ISSN: 1318-2099
Language: English
Page range: 59 - 69
Submitted on: Oct 25, 2022
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Accepted on: Nov 10, 2022
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Published on: Jan 8, 2023
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2023 Tina Zagar, Blaz Valic, Tadej Kotnik, Sara Korat, Sonja Tomsic, Vesna Zadnik, Peter Gajsek, published by Association of Radiology and Oncology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.