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Evaluation of long-term exposure to the magnetic field produced from power lines.

Radiation protection dosimetry · 2001 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3893

The paper describes procedures to estimate long-term exposure to 50 Hz magnetic fields near power lines, including assessing correlation between line current variation and measured magnetic induction. For a school near two lines on the same supports, a range …

Study snapshot

PublicationRadiation protection dosimetry · 2001
Study typeexposure_assessment
Reported directionUnclear
Evidence ratingInsufficient

Abstract

For some years, the Italian Regional Agencies for Environmental Protection (ARPA) have been engaged in the evaluation of long-term exposure to 50 Hz magnetic fields for receptors close to power lines. In this study, experiences and procedures are suggested in order to estimate long-term exposure levels in the case of magnetic induction produced contemporaneously by different power lines. In the simplest cases, the influence of a single line is evaluated by verifying the correlation factor between the variation of the current in each line and the measured magnetic induction. When the prevalence of a single line is not clear and systematic, much additional data (voltage, current, phases and geometrical configuration) have to be considered. The case of a school in Livomo near two lines. placed on the same supports, is described and a range of the most probable exposure values is given, corresponding to the phase change of the two current fluxes.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeexposure_assessment
Effect directionunclear
Populationreceptors close to power lines; case example: a school in Livomo (Italy) near two power lines
Sample sizeNot supplied
ExposureELF · 0.05 MHz · long-term
Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

The paper describes procedures to estimate long-term exposure to 50 Hz magnetic fields near power lines, including assessing correlation between line current variation and measured magnetic induction. For a school near two lines on the same supports, a range of most probable exposure values is provided corresponding to phase changes of the two current fluxes.

Outcomes measured

  • estimated long-term 50 Hz magnetic field exposure levels (magnetic induction) near power lines
  • procedures for estimating exposure when multiple power lines contribute

Limitations

  • No health outcomes reported (exposure assessment only).
  • Sample size and measurement duration/details are not provided in the abstract.
  • Quantitative exposure values are not reported in the abstract.
View raw extracted JSON
{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "ELF",
    "source": "power lines",
    "frequency_mhz": 0.05,
    "sar_wkg": null,
    "duration": "long-term"
  },
  "population": "receptors close to power lines; case example: a school in Livomo (Italy) near two power lines",
  "sample_size": null,
  "outcomes": [
    "estimated long-term 50 Hz magnetic field exposure levels (magnetic induction) near power lines",
    "procedures for estimating exposure when multiple power lines contribute"
  ],
  "main_findings": "The paper describes procedures to estimate long-term exposure to 50 Hz magnetic fields near power lines, including assessing correlation between line current variation and measured magnetic induction. For a school near two lines on the same supports, a range of most probable exposure values is provided corresponding to phase changes of the two current fluxes.",
  "effect_direction": "unclear",
  "limitations": [
    "No health outcomes reported (exposure assessment only).",
    "Sample size and measurement duration/details are not provided in the abstract.",
    "Quantitative exposure values are not reported in the abstract."
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "ELF",
    "50 Hz",
    "magnetic field",
    "magnetic induction",
    "power lines",
    "long-term exposure",
    "exposure assessment",
    "Italy",
    "ARPA",
    "school"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.2,
      "reason": "Mentions environmental protection agencies evaluating exposure, but the described receptors include a school and nearby residents rather than workers; relevance is limited."
    }
  ]
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1093/oxfordjournals.rpd.a006697
PubMed: 11878428

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