Cedo - (Section 4) Monitoring For Radiation Flashcards
What is the most important field instrument to have and use?
A Survey meter
What are the two basic types of devices used to detect radiation?
Portable hand-held gamma survey meters and dosimeters
What are some types of survey meters?
- Ion Chamber Instruments
- Geiger Muller Counter
- Proportional Counters
What do survey meters measure?
Intensity of radiation and the process of ionization.
What do dosimeters measure?
Total absorbed dose over time.
What are the main types of dosimeters?
- Direct Reading Dosimeters
- Thermoluminescent Dosimeters (TLD)
- Optically Stimulated Thermoluminescent Dosimeters (OSL)
- Personal Alarming Dosimeter
What agency supplies TLD’s?
Bureau of Radiation and Medical Devices.
What agency reads TLD’s?
National Dosimetry Service Health Canada.
OSL’s can detect what kind of radiation?
X-Rays (x), Gamma-Rays (γ) and beta Particles (β)
What’s the range of detection for OSL’s?
(x) & (γ) 10 (μSv) - 10 (Sv) or 1(mrem) - 1000 (rem)
β) 100 (μSv) - 10 (Sv) or 10 (mrem) - 1000 (rem
What are 3 objectives of the Dosimetry Service?
- Calculate and record of absorbed doses.
- Report to organizations individual doses received.
- Report doses that have exceeded regulatory limits.
Where should a TLD/OSL be worn?
Between your waist and neck.
CNSC requires that alarming dosimeters be worn when and by whom?
At all times by trainees and CEDO’s.
Alarming dosimeters must never be used in place of what?
A survey meter.
