Ch 35 Health Physics

Question 1

Who was the first American to die from radiation exposure?

Answer 1

Clarence Daly

Question 2

What is Health Physics:

Answer 2

Providing occupational radiation protection and minimizing radiation dose to workers and the general public.

Question 3

When were the 1st dose limiting recommendations made?

Answer 3

1931

Question 4

Who recommends the dose limits?

Answer 4

NCRP

National Council on Radiation Protection and Measurements

Question 5

What is another word for ALARA?

Answer 5

Optimization

Question 6

Why do we practice ALARA?

Answer 6

Because of the LNT (Linear non threshold), radiation follows

Question 7

What are the (3) cardinal principles of radiation protection?

Answer 7

1. Time- short
2. Distance- long
3. Shielding

Question 8

What is the exposure time formula?

Answer 8

Exposure rate x Exposure time

Question 9

What is HVL?

Answer 9

Half Value Layer

Reduces the intensity to half of it’s original value

Question 10

What is Effective Dose (EfD?)

Answer 10

Provides a measure of the overall risk of exposure to ionizing radiation

Question 11

How does the NCRP define EfD?

Answer 11

The sum of the weighted equivalent doses for all irradiated tissues or organs

Question 12

RED:

Answer 12

Radiation Exposure Device

Question 13

RDD:

Answer 13

Radiologic Dispersal Device

Question 14

IND:

Answer 14

Improvised Nuclear Device

Question 15

What is health physics?

Answer 15

Providing occupational radiation protection and minimizing radiation dose to the public

Question 16

If the time someone is exposed to radiation is doubled the exposure will be _________.

Answer 16

Doubled