Environmental Health XII. Electromagnetic radiation
Shu-Chi Chang, Ph.D., P.E., P.A.Assistant Professor1 and Division Chief2
1Department of Environmental Engineering2Division 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
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 40K (potassium), 3H, 14C, and 226Ra
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