health physics

Question 1

First american fatality from radiation exposure

Answer 1

clarence dally

Question 2

Concerned with providing ccupational radiation protection and minimizing radiation dose to workers and the general public

Answer 2

health physics

Question 3

who reviews the recommended dose limits?

Answer 3

National council on Radiation protection and measurement (NCRP)

Question 4

Responsibilities of NCRP include:

Answer 4

nongovernmental, nonprofit publish and incorporate radiation standards

Question 5

Natural radiation exposure to public

Answer 5

82%

Question 6

Medical radiation exposure to public

Answer 6

18%

Question 7

Another name for alara

Answer 7

optimization

Question 8

ALARA Concept

Answer 8

Keep occupational and nonoccupational dose as low as reasonable achievable.

Question 9

LNT stands for

Answer 9

Linear non threshold

Question 10

Whats LNT for?

Answer 10

follow stochastic effect

Question 11

Cardinal principles of radiation protection

Answer 11

time, distance and shielding

Question 12

Exposure formula

Answer 12

Exposure= exposure rate X exposure time

Question 13

Inverse square law

Answer 13

I1/I2= (D2)^2 (D1)^2

Question 14

What is the most important factor for protection

Answer 14

Distance

Question 15

HVL

Answer 15

Half value layer; reduces the intensity to half of its original value

Question 16

TVL

Answer 16

Tenth value layer= 3.3 hvl

Question 17

Annual dose limit for Effective dose (EfD)

Answer 17

whole-body dose; annual dose limits for radiation worker 0.05Sv (5 rems)

Question 18

Effective dose definition

Answer 18

the sum of the weighted equivalent doses for all irradiated tissues or organs.
Effective dose incorporates both the effect of the type of radiation used and the radiosensitivity of the organ or body part.

Question 19

provides a measure of the overall risk of exposure to ionizing radiation.

Answer 19

Effective dose

Question 20

RED stands for

Answer 20

Radiation exposure device

Question 21

RDD stands for

Answer 21

Radiologic dispersal device

Question 22

IND stands for

Answer 22

improvised nuclear device

Question 23

if the distance from the source exceeds five times the source, it can be treated as a:

Answer 23

point source

Question 24

TVL definition:

Answer 24

the thickness of absorber that reduces the radiation intensity to one-tenth its original value

Question 25

___ TLV=____HVL

Answer 25

1; 3.3

Question 26

We assume the occupational effective dose to be ___ of the monitor dose

Answer 26

10%

Question 27

radioactive contamination is _____ life threatening.

Answer 27

rarely

Question 28

RED is

Answer 28

-sealed source of radioactive material that directly exposes people
- will not disperse radioactive material
-

Question 29

RDD is

Answer 29

• a bomb that when exploded disperses a radioactive contamination over a wide area
• may not be explosive, but rather radioactive material
• dispersed by hand in the form of powder, mist, or gas, into water or the ventilation system

Question 30

IND is

Answer 30

• contains nuclear material that can produce a nuclear explosion
• a nuclear weapon, therefore it is unlikely to be the form of attack used by a terrorist