dyp,/dt = £,D.A - Org + Ae ¥p¢ (11) dypo/dt = EOS ~ (ry + DY pg (12) dyp,/dt = £DA, - Og + Den (13) Yp ~ Ype + Ypg + Ypg * Yop (14) dysyi /dt = Five, Og + AD Ying (15) dysygp/dt = Cl ~ £2) npn > aoe (16) Yim ~ Yumi * Yume (17) dy, /dt = faanép ~ Ory + Agd¥p (18) where pe X CoIT are the rates that plutonium reaches the blood and gastrointestinal tract (GIT), respectively (uCi/day), is the biological elimination rate constant where the subscripts refer to the compartments listed in Figure 3 and Table 2, except B refers to bone and Aa is the radiological decay rate for 239py » (day"), _ b = In(2)/T,. b where Ty are the biological half-times listed in Table 2 (days), y is the plutonium burden where the subscripts refer to the compartments listed in Figure 3 and Table 2 except B refers to bone (uCi), t is time (days), D,, D,, D are the fractions of inhaled material that are deposited 3 4 5 : in the nasopharyngeal, tracheobronchial, and pulmonary regions, respectively, of the respiratory tract (see Figure 3 and Table 2), AW H are the plutonium inhalation and ingestion rates, respectively (uCi/day), 520