|Radiation Safety|| |
Radiation safety concerns the safe use of ionizing radiation. The radiation exposure has to be controlled to protect people and the environment from unnecessary exposure and the damaging effect to the health. Legal regulations require that radiation exposure (individual radiation exposure as well as collective dose) must be kept as low as reasonably achievable.
The electromagnetic spectrum includes x-rays, gamma rays, ultraviolet radiation, visible light, infrared radiation, and radio waves. Additionally, there are several types of particulate radiation e.g., alpha and beta particles. All types of radiation are used in a wide range of medicine, industry, research and communication. Radiation risks can occur due to either long-term low level exposure or short-term high level exposure. A well-functioning dosimetry program is essential for a safe use and for compliance with federal and state regulations.
Three basic rules have to be observed for a safe use of ionizing radiation.
||Keep a radiation source at high distance. A doubled distance reduces the exposure by a factor of four.|
||Minimize the time near a source of radiation.|
||Optimize radiation shielding to absorb radiation. The greater the shielding around a radiation source, the smaller the exposure.|
See also Inverse Square Law, Administrative Dose Guidelines and Annual Dose Limit.
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| Further Reading:|
|If an elderly but distinguished scientist says that something is possible he is almost certainly right, but if he says that it is impossible he is very probably wrong. |
- Arthur C. Clarke