Signage, Transport And Exposure Limits

Question 1

Grave Danger: Very High Radiation Area

Answer 1

Posted where one can receive more than 500 rads (5 grays) in 1 hour at 1 meter from radiation source

Question 2

Caution: High Radiation Area

Answer 2

Posted where one can receive more than 100 mR/hr (1.0 mSv) at 30 cm

Question 3

Caution: Radiation Area

Answer 3

Posted where one can receive more than 5 mR/hr (0.05 mSv/hr) at 30 cm

Question 4

Caution: Radioactive Materials

Answer 4

Posted in an area where radioactive materials are stored where limits exceed 2 mrem/hr or 0.02 mSv/hr

Question 5

Radioactive III (yellow 3)

Answer 5

Surface 50-200 mR/hr
TI 10 mR/hr

Question 6

Radioactive II (yellow 2)

Answer 6

Surface 0.5-50 mR/hr
TI 1.0 mR/hr

Question 7

Radioactive I (white 1)

Answer 7

Surface 0.5 mR/hr
TI no detectable radiation

Question 8

General public exposure limits

Answer 8

Wholebody 0.1 rem/yr (0.001Sv)

Question 9

Occupational exposure limits

Answer 9

Wholebody: 5 rem/yr (0.05 Sv)
Skin/Extremity: 50 rem/yr (0.5 Sv)
Any organ or tissue: 50 rem/yr (0.5 Sv)
Lens of eye: 15 rem/yr (0.15 Sv)
Fetus: 0.5 rem/yr (0.005 Sv)