Occupational and Fetal Flashcards
branch of physics concerned with providing radiation protection to the public and occupational workers
health physics
individual educated in the theory and implementation of radiation safety programs
health physicist
radiation worker deaths per 100k per year
9 per year
thickness of a material that will reduce the intensity of the exposure by half
half value layer
thickness of a material that will reduce an exposure to 1/10th the original value
tenth value layer
1 TVL = __ HVL
3
current occupational dose limit (week and year)
100 mRem per week, 5 rem per year
annual occupational effective dose limit
50 mSv (5000 mRem)
cumulative occupational effective dose limit
10 mSv x age
occupational annual dose limit to the lens of eye
150 mSv (15 rem)
occupational annual dose limit to thyroid, skin, hands, feet
500 mSv (50 rem)
annual effective dose limits to public in comparison to occupational workers
public limit is 1 / 10 of occupational limit
public effective annual dose limit (frequently exposed)
1 mSv
how many rads will cause re-absorption of embryo in .01% of exposures?
10 rads during the first 2 weeks of pregnancy
how many rads will cause spontaneous abortion in 0.01% of exposures?
25 rads
what percentage of all pregnancies end in spontaneous abortion
25-50%
radiation of fetus at 2 weeks can cause what
spontaneous abortion
radiation of fetus at 2-8 weeks can cause what
congenital abnormalities and skeletal deformaties
radiation of fetus at 12-40 weeks can cause what
childhood malignancies, leukemia / cancer
fetal dose is estimated to be ____ of the skin dose to the mother
half
