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