Document Detail


Assessing compliance with power-frequency magnetic-field guidelines.
MedLine Citation:
PMID:  12199555     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Several organizations have established guidelines for occupational exposure to power-frequency magnetic fields. At 60 hertz, exposure limits are 1.0 millitesla (mT) for the American Conference of Governmental Industrial Hygienists, 0.42 mT for the International Committee on Non-ionizing Radiation Protection, and 1.6 mT for the National Radiation Protection Board guidelines. Adoption of the current guidelines as mandatory standards could dramatically affect electric-utility work practices. Two large personal-exposure monitoring projects have characterized exposures of overhead lineworkers and cable splicers while they perform various tasks near energized conductors. Personal exposure measurements indicate that these two groups are very likely the most highly exposed among utility workers and often experience fields above guideline levels. In addition, survey measurements in utility environments have identified locations where other workers may experience exposures at guideline levels. The nature of high-field exposure scenarios in the utility industry suggests a simple practical method for determining compliance with basic restrictions on internal induced current density [< 10 milliamperes per square meter (mA m(-2))] in the presence of fields that exceed limits to magnetic fields external to the body.
Authors:
T Dan Bracken
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Health physics     Volume:  83     ISSN:  0017-9078     ISO Abbreviation:  Health Phys     Publication Date:  2002 Sep 
Date Detail:
Created Date:  2002-08-29     Completed Date:  2002-09-25     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985093R     Medline TA:  Health Phys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  409-16     Citation Subset:  IM    
Affiliation:
T. Dan Bracken, Inc, Portland, OR 97202, USA. dan@tdb.com
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MeSH Terms
Descriptor/Qualifier:
Electromagnetic Fields*
Environmental Exposure / prevention & control,  standards
Humans
Occupational Exposure / prevention & control,  standards*
Radiation Dosage
Radiation Monitoring / instrumentation
Radiometry

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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