Final - Radiation Protection Flashcards Preview

RAT1614 Rad Therapy Physics > Final - Radiation Protection > Flashcards

Flashcards in Final - Radiation Protection Deck (25)
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1
Q

Cosmic, Terrestrial, Internal

A

Natural sources of radiation exposure

2
Q

Medical, Consumer Products, Industrial, Occupational

A

Man-made sources of radiation exposure

3
Q

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.

A

Health physics

4
Q

ALARA stands for:

A

As low as reasonably achievable

5
Q

ALARA is based on ____, ____dose response relationship.

- means?

A

Linear, Non-Threshold

- Assumes any dose of radiation, no matter how small, has a deleterious effect.

6
Q

2 modes of exposure:

A

Internal and external

7
Q

3 internal modes of exposure:

A

Inhalation, ingestion, open wound

8
Q

Time has a ____ effect on dose absorbed.

A

linear

9
Q

Dose rate decreases by the inverse square of the ____ from the source.
- Which equation shows this relationship?

A

distance
- 𝐷2/𝐷1= (𝑑1)^2/(𝑑2)^2
D = dose
d = distance

10
Q

4 ways to reduce internal exposure:

A
  1. Good Hygiene
  2. Contamination Control
  3. Reduce Airborne Hazards
  4. Use Personal Protective Equipment
11
Q

4 ways to reduce internal exposure - standard precautions:

A
  1. Handwashing
  2. gloves
  3. mask/eye protection/face shields
  4. gowns
12
Q

2 ways to reduce internal exposure - good hygiene:

A
  1. No food or drink near radioactive materials.

2. Don’t touch self or surfaces

13
Q

3 ways to reduce internal exposure - contamination control:

A
  1. Absorbent surface covers
  2. Frequent waste disposal
  3. Prompt decontamination
14
Q

3 ways to reduce internal exposure - airborne hazards:

A
  1. Fume hoods
  2. Avoid dust, aerosol
  3. Avoid inhalation
15
Q

The presence of radiation is called ____.

A

Detection

16
Q

The total amount of radiation detected is called ____.

A

Intensity

17
Q

The amount of radiation detected per unit of time is called ____.

A

Rate

18
Q

Dose limit to embryo/fetus during pregnancy is ___.

A

0.5 mSv

19
Q

Life-saving dose limit is ____.

A

0.5 Sv

20
Q

Occupational dose limit is ___ per year.

A

50 mSv

21
Q

Lifetime occupational dose limit is ____.

- does this apply to FL?

A

age x 10 mSv

- no

22
Q

Dose to the lens of the eye has ____ effects.

- ___ is the dose limit per year.

A

Deterministic

- 150 mSv

23
Q

Dose to the skin of the extremities has ____ effects.

- ___ is the dose limit per year.

A

Deterministic

- 500 mSv

24
Q

The largest man-made source of radiation that people will get is from ____.

A

Medical radiation

25
Q

PPE (Personal Protective Equipment) examples: (4)

A
  1. Gloves
  2. mask
  3. eye protection/glasses
  4. gowns