International Workshop on Exposure Metrics and Dosimetry for EMF Epidemiology. Chilton, GBR, 1998/09/07.
Magnetic field strengths produced by industrial processes can be very large, but they often exhibit a marked spatial variation.
Whilst there may be the potential for exposures of workers to be high, actual exposure will be determined to a great extent by working practices.
Possible metrics for epidemiological studies might be based on the temporal variability of exposure as well as maximum operator exposure or time-weighted average exposure and, whilst it might be possible to estimate these quantities from spot magnetic field strength measurements and observed working practices, this might be very difficult to achieve in practice.
An alternative would be the use of a logging dosemeter : this paper describes some of the results of exposure assessments carried out in industrial environments with a modified EMDEX II magnetic field dosemeter.
Magnetic fields in industrial environments often have waveforms which are not purely sinusoidal.
Distortion can be introduced by the magnetic saturation of transformer and motor cores, hy rectification, by poor matching between oscillator circuits and loads and when thyristors are used to control power.
The resulting repetitive but non-sinusoidal magnetic field waveforms can be recorded and analysed ; the spectral data may be incorporated into possible exposure metrics. (...)
Mots-clés Pascal : Champ magnétique, Industrie, Répartition spatiale, Dosimétrie, Exposition professionnelle, Analyse risque, Radioprotection
Mots-clés Pascal anglais : Magnetic field, Industry, Spatial distribution, Dosimetry, Occupational exposure, Risk analysis, Radioprotection
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Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0336697
Code Inist : 002A08F05. Création : 16/11/1999.