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Comparative fire risk study of PCB transformers.

R F Boykin, M Kazarians, R A Freeman

    Risk Analysis : an Official Publication of the Society for Risk Analysis
    |December 1, 1986
    PubMed
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    This risk assessment compares mineral oil and polychlorinated biphenyl (PCB)-askarel dielectric fluids in transformers. Mineral oil transformers pose a lower acute injury risk in typical installations compared to PCB-askarel.

    Area of Science:

    • Electrical engineering
    • Environmental science
    • Occupational safety

    Background:

    • Polychlorinated biphenyl (PCB)-askarel and mineral oil are common dielectric fluids in transformers.
    • Transformer failures can lead to acute health risks for personnel.
    • Assessing and comparing these risks is crucial for safety protocols.

    Purpose of the Study:

    • To conduct a comparative risk assessment of acute health effects from mineral oil and PCB-askarel dielectric fluids.
    • To evaluate risks in two distinct transformer installation scenarios.
    • To quantify risk in terms of injury or fatality frequency per transformer year.

    Main Methods:

    • Risk assessment methodology applied to two transformer sites.
    • Comparison of PCB-askarel-filled transformers with sprinkler protection against mineral oil-filled transformers.

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  • Comparison of mineral oil-filled transformers in a vault setting.
  • Risk quantification using frequencies of acute injuries or fatalities.

    • Main Results:

    • Site 1: Risk comparison between PCB-askarel and mineral oil transformers under specific installation conditions.
    • Site 2: Risk comparison for mineral oil transformers in a vault installation.
    • Risk expressed as frequency of acute injuries/fatalities per transformer year.

    Conclusions:

    • The study provides a quantitative comparison of acute risks associated with different dielectric fluids and installation types.
    • Findings can inform safety measures and fluid selection for transformers.
    • Risk assessment highlights the importance of considering fluid type and installation environment.