The protection of the public

Question 1

Sources of Radiation

Answer 1

Natural Environmental
Man-made

Question 2

Components of Natural Environmental

Answer 2

Cosmic rays
Terrestrial radiation
Internally deposited radionuclides

Question 3

Radiation Protection Techniques

Answer 3

Time
Distance (inverse Square Law)
Shielding

Question 4

Half Value Layer (HVL)

Answer 4

half value layer is the thickness of material required to reduce the quantity (intensity) of the x-ray beam by 50%

Question 5

Radiation Protection Principles

Answer 5

Justification
Optimization of protection and safety
Application of dose limits

Question 6

ALARA for x-ray protection

Answer 6

A; as
L; Low
A; As
R; Reasonably
A; Achievable

Question 7

Maximum Permissible Dose (MPD)

Answer 7

affected both by the size of each dose
and the rate at which these dose are received.

General Public
Skin, hands, feet (50mSv/year)

Lens of the eye (15mSv/year)

Sv = dose equivalent

Question 8

The primary use of instruments for detecting and measuring radiation

Answer 8

Survey meters:
Level of radioactive contamination
The radiation dose rate in the area

Laboratory radiation counter:
Identity and quantity of radioactive material

Personnel dosimeters:
Accumulated dose to individual in area