Dosimetric issues with simplified homogeneous body models in low frequency magnetic field exposure assessment

A simplified procedure, using circular disk models with homogeneous electric conductivity as
representations for different body parts, has been proposed recently by product standard IEC 62822-3
for the assessment of magnetic field exposure in proximity to current-carrying conductors of welding
equipment. Based on such simplified models, worst case coupling coefficients CCE i (I), i.e. maximum
induced electric field strength, normalised for current and frequency, for body parts at different
distances d to straight single and double wire arrangements, as well as rectangular loop-shaped
current paths are tabulated in the standard. In this work we compared CCE i (I) values obtained by
numerical computations with detailed anatomical models of the hand/forearm with the corresponding
values given in IEC 62822-3 for current-carrying single wire conductors along the forearm at
distances d  = 30, 50 and 100 mm, respectively. Our results clearly indicated that the CCE ...

Source: Journal of Radiological Protection - July 6, 2019 Category: Physics Authors: Gernot Schmid, Rene Hirtl and Theodoros Samaras Source Type: research