A. Self Introduction
This module is designed to inform the worker about radioactive contamination and discuss
methods used to control the spread of contamination.
C. Objectives Review
Contamination control is one of the important aspects of radiological protection. Using proper
contamination control practices helps to ensure a safe working environment. It is important for
all employees to recognize potential sources of contamination and to use appropriate
contamination control methods.
A. Comparison of Ionizing Radiation and Radioactive Contamination
Energy (particles or rays) emitted from radioactive atoms or generated from machines such
as X-ray machines that can cause ionization (e.g., gamma rays, X rays, beta particles, and
other particles capable of ionizing atoms).
Radioactive material is material that contains radioactive atoms. When radioactive material is
properly contained, it still emits radiation and may be an external dose hazard, but it is not a
contamination hazard. When radioactive material escapes its container, it is then referred to
as radioactive contamination.
Radiation is energy; contamination is a material.
Types of Contamination
Radioactive contamination can be fixed, removable, or airborne.
Fixed contamination is contamination that cannot be easily removed from surfaces.
It cannot be removed by casual contact.
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