Final - Radiation Protection Flashcards
Cosmic, Terrestrial, Internal
Natural sources of radiation exposure
Medical, Consumer Products, Industrial, Occupational
Man-made sources of radiation exposure
Branch of physics or biophysics concerned with radiation physics and radiation biology, whichdeals with the safe use of ionizing and nonionizing radiation in academic, government, industrial, medical, nuclear power, research, and other civilian and military applications of radiation.
Health physics
ALARA stands for:
As low as reasonably achievable
ALARA is based on ____, ____dose response relationship.
- means?
Linear, Non-Threshold
- Assumes any dose of radiation, no matter how small, has a deleterious effect.
2 modes of exposure:
Internal and external
3 internal modes of exposure:
Inhalation, ingestion, open wound
Time has a ____ effect on dose absorbed.
linear
Dose rate decreases by the inverse square of the ____ from the source.
- Which equation shows this relationship?
distance
- 𝐷2/𝐷1= (𝑑1)^2/(𝑑2)^2
D = dose
d = distance
4 ways to reduce internal exposure:
- Good Hygiene
- Contamination Control
- Reduce Airborne Hazards
- Use Personal Protective Equipment
4 ways to reduce internal exposure - standard precautions:
- Handwashing
- gloves
- mask/eye protection/face shields
- gowns
2 ways to reduce internal exposure - good hygiene:
- No food or drink near radioactive materials.
2. Don’t touch self or surfaces
3 ways to reduce internal exposure - contamination control:
- Absorbent surface covers
- Frequent waste disposal
- Prompt decontamination
3 ways to reduce internal exposure - airborne hazards:
- Fume hoods
- Avoid dust, aerosol
- Avoid inhalation
The presence of radiation is called ____.
Detection
The total amount of radiation detected is called ____.
Intensity
The amount of radiation detected per unit of time is called ____.
Rate
Dose limit to embryo/fetus during pregnancy is ___.
0.5 mSv
Life-saving dose limit is ____.
0.5 Sv
Occupational dose limit is ___ per year.
50 mSv
Lifetime occupational dose limit is ____.
- does this apply to FL?
age x 10 mSv
- no
Dose to the lens of the eye has ____ effects.
- ___ is the dose limit per year.
Deterministic
- 150 mSv
Dose to the skin of the extremities has ____ effects.
- ___ is the dose limit per year.
Deterministic
- 500 mSv
The largest man-made source of radiation that people will get is from ____.
Medical radiation
PPE (Personal Protective Equipment) examples: (4)
- Gloves
- mask
- eye protection/glasses
- gowns
