Internal Contamination Flashcards
1
Q
Te»_space;> 10 years
A
equilibrium never achieved
2
Q
Te equation
A
Tr x Tb / Tr + Tb
3
Q
Skeleton % of body
A
10% (7 kg standard man)
4
Q
Maximum permissible Body burden for Ra-226
A
- 1 micro grams
3. 7 kBq
5
Q
Amount of dose 3.7 kBq delivers
A
- 6 mSv/week
291. 2 mSv/year
6
Q
N
A
relative damage factor
7
Q
Relative Damage Factor
A
accounts for other bone seekers that are not uniformly distributed
8
Q
If Radium is first in decay chain
A
all N = 1
9
Q
all alpha and beta emission N (unless radium is first)
A
N = 5
10
Q
3 bone areas per ICRP 30
A
compact
trabecular
red (marrow)
11
Q
Most sensitive bone tissues
A
endosteum (first 10 microns)
red marrow
12
Q
Classification of bone seekers
A
Alkaline earth metals
13
Q
Volume seeker
A
Tr > 15 days
14
Q
surface seeker
A
Tr < 15 days
