r
cit
=f
4A
furc*nprs’npte * fice*icYitc * *Lw¥iv + £, fee*LYLrver
Ts”
CT TTT oo 7V
THORACIC. a
10%
| LYMPHNODES
85%
|
|
(3 YEARS)
|
|
PULMONARY *
:
|
LUNG (100%)
15%
|
||
VARIABLE
(50 DAYS INITIALLY
| DOUBLING EVERY YEAR}
|
| |
|
|
1%
de
ayear
Y
Loop
[SKELETON
(100 YEARS)
xipneys
(40 YEARS)
i
COMPARTMENT
.
)
+}
“|
Vv
SUMMATION
OF FECES
[,_10%
>
90%
LIVER
|_(40 YEARS)
+ fea hy¥x + ABYponE
(60)
dynppp/dt = (0.7) (D4 +D, + D.dA- OQ, + Ayre) NPTR
(61)
dy,/dt = (0.3)(0.85)(D, + D, + DAW Og + ALI
(62)
dy,y/dt = (0.3)(0.15)(D, + D, + DAQ- Oy + Ay) py
(63)
My = [1n€2)/50Jexp(1n(2)t/365)
a
2
71
|
* BASED ON 103% OF THE INITIAL ALVEOLAR DEPOSITION.
FIGURE 6. BLOCK DIAGRAM OF THE LONG-TERM FORM OF THE SDB MODEL
(65)
dou’ ?t > from te%nc 7 Ox * Av? ¥eran
(66)
dyoune St = four auYriNm 7 “AYTLNR
(67)
9arwy/4t * fpcarticYic ~ Ca + Aan ¥atnm
(68)
4arr’ = fara*aLYatnm ~ *AYALNR
(69)
where
t,A,y,£,D and Aare as defined previously in the ICRP II and Task
Group models.
The subscripts, where different, are as
follows:
NPTB refers to the combined nasopharynxtracheobronchial region; LC refers to that portion of the
pulmonary lung with a constant biological half-time, LV
refers to the variable half~time portion, and P refers
to the combined portions; TLNM and ALNM refer to those
portions of the thoracic and abdominal lymph nodes,
respectively, in which plutonium is mobile while TLNR
and ALNR refer to the corresponding portions where plutonium is retained
indefinitely;
LCG refers
to transfer
from LC to GIT, LG is from liver to GIT, LCB is from LC
to blood,
670
(64)
Xp = Ye * yy
25%
99% Fsunmation [2%
“| OF URINE
x
(INFINITE)
| 70%
h
fors‘nere’npte * Fres*ne%Le
Tattuum + fALB ALYaLNM * Sip LYLIveR
feowranmtenr
(1 YEAR)
|!
_——
Ji
ae
30%
T 30%
—>
-
100%
I
7
ft 10%
—>|
[100%
92
|
[COMPARTMENT] |
80% |
ir
l
-o*
|
Lr. tS
L_cnrinite)
I7l
+f
oj,NFS
COMPARTMENT
CONSTANT
+
i ABDOMINAL a
ly
=
59
CF)
TLB is
from TLNM to blood,
ALB is
from ALNM to
bleod, LB is liver to blood, KB is kidney to blood, LCTL
LC to TLNM, and LCAL is LC to ALNM.
671