Assessment of inhomogeneous ELF magnetic field exposures

In daily life as well as at workplaces, exposures to inhomogeneous magnetic fields become very frequent. This makes easily applicable compliance assessment methods increasingly important. Reference levels have been defined linking basic restrictions to levels of homogeneous fields at worst-case expo...

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Bibliographic Details
Published in:Radiation protection dosimetry 2008-08, Vol.131 (2), p.251-258
Main Authors: Leitgeb, N., Cech, R., Schröttner, J.
Format: Article
Language:English
Subjects:
Central Nervous System - physiology
Computer Simulation
Consumer Product Safety
Electrical Equipment and Supplies
Electromagnetic Fields
Environmental Exposure
Environmental Monitoring - methods
Equipment Safety
Guideline Adherence
Humans
Models, Biological
Occupational Exposure
Safety
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Summary:In daily life as well as at workplaces, exposures to inhomogeneous magnetic fields become very frequent. This makes easily applicable compliance assessment methods increasingly important. Reference levels have been defined linking basic restrictions to levels of homogeneous fields at worst-case exposure conditions. If reference levels are met, compliance with basic restrictions can be assumed. If not, further investigations could still prove compliance. Because of the lower induction efficiency, inhomogeneous magnetic fields such as from electric appliances could be allowed exceeding reference levels. To easily assess inhomogeneous magnetic fields, a quick and flexible multi-step assessment procedure is proposed. On the basis of simulations with numerical, anatomical human models reference factors were calculated elevating reference levels to link hot-spot values measured at source surfaces to basic limits and allowing accounting for different source distance, size, orientation and position. Compliance rules are proposed minimising assessment efforts.
ISSN:0144-8420
1742-3406
DOI:10.1093/rpd/ncn132