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Environmental Health XII. Electromagnetic radiation

Environmental Health XII. Electromagnetic radiation. Shu-Chi Chang, Ph.D., P.E., P.A. Assistant Professor 1 and Division Chief 2 1 Department of Environmental Engineering 2 Division of Occupational Safety and Health, Center for Environmental Protection and Occupational Safety and Health

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Environmental Health XII. Electromagnetic radiation

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  1. Environmental Health XII. Electromagnetic radiation Shu-Chi Chang, Ph.D., P.E., P.A. Assistant Professor1 and Division Chief2 1Department of Environmental Engineering 2Division of Occupational Safety and Health, Center for Environmental Protection and Occupational Safety and Health National Chung Hsing University Friday, June 15, 2007

  2. Outline • Introduction • Nonionizing radiation • Ionizing radiation • Natural background radiation • Artificial sources • Nuclear power operations • Nuclear weapon testing • Consumer products • Control and benefits

  3. Introduction

  4. Introduction

  5. Nonionizing radiation • UV • Visible light • Infrared radiation • Microwave • Radio frequency • Electro-magnetic field • Standards for control

  6. Ionizing radiation • Types • X-rays • Alpha, beta and gamma rays • Biological effects • Unit of dose • Dose-response relationships • Types of exposures

  7. Natural background radiation • Cosmic radiation • Terrestrial readiation • 40K (potassium), 3H, 14C, and 226Ra

  8. Artificial sources • Radiation machines • Industrial use • Commercial use • Research use • Radioactive materials

  9. Nuclear power operations • Mining, milling, and fabrication • Treatment of spent fuel • Commercial nuclear power plants

  10. Nuclear weapon testing • The late 1940s through the early 1960s • Nevada

  11. Consumer products • Sources • Within the home • Workplace • Personal basis (consumer products) • Cigarette smoking • Others

  12. Control and benefits • Controls • Potassium • Radon • Medical X-ray machine • Capsule- and loose-form • Benefits • Modernization • Medical advent • Industrial application • Agricultural usage • Genetically modified organisms • Insect control

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