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Magnetic field exposure in a nondestructive testing operation.

Archives of environmental & occupational health · 2007 · Unclear · Low evidence

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UnclearLow evidencePaper 3391

Investigators recorded 95 peak magnetic field measurements during magnetic particle inspection of 8 turbine engine shafts, ranging from <0.1 to 29.27 mT. The measured exposure values were described as among the highest reported in occupational settings.

Study snapshot

PublicationArchives of environmental & occupational health · 2007
Study typeexposure_assessment
Reported directionUnclear
Evidence ratingLow

Abstract

Nondestructive testing is any technique used to inspect the integrity of a manufactured item without diminishing its future usefulness. Magnetic particle inspection is one type of nondestructive testing that uses electromagnetism in the inspection procedure, thus potentially exposing the operator to magnetic fields. During magnetic particle inspection, investigators took peak magnetic field measurements of 8 turbine engine shafts at a turbine engine overhaul and repair center. They recorded 95 peak magnetic field measurements, ranging from < 0.1 to 29.27 mT. The exposure values measured were among the highest reported in the occupational setting. Further work is needed to characterize magnetic field exposures in magnetic particle inspection operations--in particular, by differentiating magnetic field magnitude by current frequency--and to understand exposure as it relates to different types of magnetic particle inspection devices.

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
PopulationOperators performing magnetic particle inspection (nondestructive testing) at a turbine engine overhaul and repair center
Sample size8
ExposureELF
Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Investigators recorded 95 peak magnetic field measurements during magnetic particle inspection of 8 turbine engine shafts, ranging from <0.1 to 29.27 mT. The measured exposure values were described as among the highest reported in occupational settings.

Outcomes measured

  • Peak magnetic field measurements (mT) during magnetic particle inspection

Limitations

  • Only peak magnetic field measurements reported; other exposure metrics not described in abstract
  • Frequency characteristics of the magnetic fields were not differentiated; authors note need to characterize magnitude by current frequency
  • Results pertain to measurements taken during inspection of 8 turbine engine shafts at a single facility; generalizability not stated
  • Exposure differences by type of magnetic particle inspection device not characterized
View raw extracted JSON
{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "ELF",
    "source": "occupational",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Operators performing magnetic particle inspection (nondestructive testing) at a turbine engine overhaul and repair center",
  "sample_size": 8,
  "outcomes": [
    "Peak magnetic field measurements (mT) during magnetic particle inspection"
  ],
  "main_findings": "Investigators recorded 95 peak magnetic field measurements during magnetic particle inspection of 8 turbine engine shafts, ranging from <0.1 to 29.27 mT. The measured exposure values were described as among the highest reported in occupational settings.",
  "effect_direction": "unclear",
  "limitations": [
    "Only peak magnetic field measurements reported; other exposure metrics not described in abstract",
    "Frequency characteristics of the magnetic fields were not differentiated; authors note need to characterize magnitude by current frequency",
    "Results pertain to measurements taken during inspection of 8 turbine engine shafts at a single facility; generalizability not stated",
    "Exposure differences by type of magnetic particle inspection device not characterized"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "nondestructive testing",
    "magnetic particle inspection",
    "occupational exposure",
    "magnetic fields",
    "peak measurements",
    "turbine engine shafts",
    "mT"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.9,
      "reason": "Study measures magnetic field exposure during an industrial nondestructive testing operation."
    }
  ]
}
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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: 10.3200/aeoh.62.4.187-193
PubMed: 18458022

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