Annual dose limits

Question 1

Linear-nonthreshold relationship

Answer 1

Degree of response is DIRECTLY proportional to the amount of radiation received

Question 2

Linear-threshold relationship

Answer 2

When the threshold dose is exceeded, the response is DIRECTLY proportional to the dose received

Question 3

Example of linear-threshold relationship

Answer 3

Cataractogensis does not occur at low levels of radiation exposure; There is a threshold dose below which cataractogensis does not occur.

Question 4

Nonlinear-threshold relationship

Answer 4

When threshold dose is exceeded, the response is NOT directly proportional to the dose received and is increasingly effective per unit dose

Question 5

Nonlinear-nonthreshold relationship

Answer 5

No level of radiation can be considered safe; a response occurs at every dose; The degree of the response is not directly proportional to the dose received

Question 6

Annual dose limits are published by who?

Answer 6

National Council on Radiation Protection and Measurements (NCRP)

Question 7

Probabilistic effect

Answer 7

Increased dose equals increased probability, not severity, of effects

Question 8

Deterministic effects

Answer 8

Effects that become more severe at high levels of radiation exposure and do not occur below a certain threshold dose

Question 9

Annual effective dose limit for occupational exposure is

Answer 9

50 mSv (5 rem or 5000mrem)

Question 10

Cumulative effective dose limit

Answer 10

Age (in years) x 10 mSv (1 rem)

Question 11

Students limit

Answer 11

Same as occupational exposure limit (50 mSv [5rem])

Question 12

Embryo-fetus total equivalent dose for gestation

Answer 12

5 mSv (5 rem)

Question 13

Annual effective dose limit for general public - frequent exposure

Answer 13

1 mSv (0.1 rem)

Question 14

Annual effective dose limit for general public - infrequent exposure

Answer 14

5 mSv (0.5 rem)