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.

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Presentation transcript:

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 National Chung Hsing University Friday, June 15, 2007

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

Introduction

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

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

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

Artificial sources Radiation machines Industrial use Commercial use Research use Radioactive materials

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

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

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

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