NMTCB STUDY GUIDE WITH COMPLETE SOLUTIONS

NMTCB STUDY GUIDE WITH COMPLETE
SOLUTIONS
3 major federal agencies that control use of radioactive materials in NM - ANSWER-
NRC
DOT
FDA

DOT I (white) - ANSWER-At contact no more than 0.5 mR/hr
At 3ft no detected radioactivity

DOT II (yellow) - ANSWER-Contact = no more than 50 mR/hr
3ft = no more than 1 mR/hr

DOT III (yellow) - ANSWER-Contact = no more than 200 mR/hr
3ft = no more than 10 mR/hr

Total dose calculation - ANSWER-Total dose = (dose rate)(time)

Inverse square law - ANSWER-(Intensity1 x Distance1)^2 = (I2)(D2)^2

Occupational exposure: Whole-body - ANSWER-50 mSv or 5 rem /year

Occupational exposure: Lens of eye - ANSWER-150 mSv or 15 rem /year

Occupational exposure: Any organ or tissue - ANSWER-500 mSv or 50 rem /year

Occupational exposure: Skin or any extremity - ANSWER-500 mSv or 50 rem /year

Exposure for general public - ANSWER-1 mSv or 0.1 rem /year

Exposure for embryo/fetus of occupationally exposed worker - ANSWER-5 mSv or 0.5
rem for entire pregnancy

Caution: radioactive materials - ANSWER-Any area w/RA materials
Entrances to lab and department
Potential presence of radiation sources/contamination
No eating or drinking in area
No smoking or applying cosmetics in area

Caution: radiation area - ANSWER-Areas you could receive more than 0.05 mSv (5
mrem) in 1 hour at 30 cm from source
Commonly seen at NM lab entrances