Podcast
Questions and Answers
What is the purpose of a Contamination Control Area (CCA)?
What is the purpose of a Contamination Control Area (CCA)?
- To measure the decay of radioactive materials
- To prevent radioactive contamination transfer between contaminated and non-contaminated areas (correct)
- To store radioactive materials safely
- To monitor radiation levels in the atmosphere
Which instruments are preferred for handheld monitoring of large areas for surface contamination?
Which instruments are preferred for handheld monitoring of large areas for surface contamination?
- Whole Body Monitors
- Geiger counters
- Proportional counters (correct)
- Airborne Particulate Monitors
What is the difference between fixed and loose surface contamination?
What is the difference between fixed and loose surface contamination?
- Fixed contamination cannot be easily spread, while loose contamination can be easily spread (correct)
- Fixed contamination can be easily spread, while loose contamination cannot
- Fixed contamination has a higher decay rate than loose contamination
- Fixed contamination is not hazardous, while loose contamination is hazardous
How is access controlled in a Contamination Control Area (CCA)?
How is access controlled in a Contamination Control Area (CCA)?
Which instruments can discriminate between Alpha and Beta contamination?
Which instruments can discriminate between Alpha and Beta contamination?
What is the Hazard Posting Limit for Loose Surface Contamination at Bruce Power and OPG?
What is the Hazard Posting Limit for Loose Surface Contamination at Bruce Power and OPG?
What is the main purpose of a Radioactive Work Area (RWA)?
What is the main purpose of a Radioactive Work Area (RWA)?
Which technique is used for indirect survey of surface contamination?
Which technique is used for indirect survey of surface contamination?
What are the Hazard Posting Limits for Contact Gamma and Contact Beta at radioactive work areas?
What are the Hazard Posting Limits for Contact Gamma and Contact Beta at radioactive work areas?
What are the characteristics of Hot Particles in the context of contamination control?
What are the characteristics of Hot Particles in the context of contamination control?
Study Notes
Contamination Control Area (CCA)
- The purpose of a CCA is to prevent the spread of radioactive contamination and to protect personnel and the environment.
Surface Contamination Monitoring
- Handheld instruments, such as Geiger-Müller counters and scintillation counters, are preferred for monitoring large areas for surface contamination.
Types of Surface Contamination
- Fixed surface contamination is firmly bonded to the surface and cannot be easily transferred, whereas loose surface contamination can be easily transferred to people or surfaces.
Access Control in CCA
- Access is controlled in a CCA through the use of procedures, signage, and personnel training to ensure that only authorized personnel enter the area.
Alpha and Beta Contamination Discrimination
- Instruments that can discriminate between Alpha and Beta contamination include alpha-beta discriminators and spectroscopic instruments.
Hazard Posting Limits
- The Hazard Posting Limit for Loose Surface Contamination at Bruce Power and OPG is 1.5 Bq/cm².
- The Hazard Posting Limits for Contact Gamma and Contact Beta at radioactive work areas are 2.5 mR/h and 1.5 Bq/cm², respectively.
Radioactive Work Area (RWA)
- The main purpose of a RWA is to provide a controlled area for handling radioactive materials and to prevent the spread of radioactive contamination.
Indirect Survey of Surface Contamination
- The technique used for indirect survey of surface contamination is smearing, which involves wiping surfaces with a detector to detect contamination.
Hot Particles
- Hot particles, in the context of contamination control, are small, highly radioactive particles that can be transferred to people or surfaces, and are typically characterized by high activity, small size, and low density.
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Description
Test your knowledge of surface contamination, factors affecting exposures to external hazards, CCA/CCCA requirements, contamination survey techniques, and hot particles characteristics in Module 3 of RADS 1021 Contamination Control with Melissa Hollandy.
