Table of Contents - The Atmospheric Studies Group at TRC

Section 9: CALPUFF
Table 9-3 (Continued)
CALPUFF Control File Inputs - Input Group 11b
Chemistry Parameters
Input Group 11b consists of a table containing the number of half-life decay specifications for each
radioactive species specified in Input Group 3. The 24 radioactive species of Input Group 3 are;
! CSPEC = H-3 ! !END!
! CSPEC = HE-3 ! !END!
! CSPEC = C-14 ! !END!
! CSPEC = N-14 ! !END!
! CSPEC = CO-58 ! !END!
! CSPEC = FE-58 ! !END!
! CSPEC = CO-60 ! !END!
! CSPEC = NI-60 ! !END!
! CSPEC = KR-85 ! !END!
! CSPEC = RB-85 ! !END!
! CSPEC = I-131 ! !END!
! CSPEC = XE-131M ! !END!
! CSPEC = XE-131 ! !END!
! CSPEC = I-133 ! !END!
! CSPEC = XE-133M ! !END!
! CSPEC = XE-133 ! !END!
! CSPEC = CS-133 ! !END!
! CSPEC = CS-134 ! !END!
! CSPEC = BA-134 ! !END!
! CSPEC = XE-134 ! !END!
! CSPEC = CS-137 ! !END!
! CSPEC = BA-137M ! !END!
! CSPEC = BA-137 ! !END!
Each species modeled is assigned a decay half-life (sec), and the associated mass lost may be
assigned to one or more other modeled species using a mass yield factor. CALPUFF includes
NDECAY blocks which assign the half-life for a parent species and mass yield factors for each child
species (if any) produced by the decay. An example of the CALPUFF default values for the 23
radioactive species is as follows;
Set HALF_LIFE=0.0 for NO decay (infinite half-life).
a
b
SPECIES Half-Life Mass Yield
NAME (sec) Factor
------- --------- ----------
! H-3 = 388523520.0, -1.0 ! (Parent)
! HE-3 = -1.0, 1.0 ! (Child) !END!
! C-14 = 179755200000.0, -1.0 ! (Parent)
! N-14 = -1.0, 1.0 ! (Child) !END!
! CO-58 = 6122304.0, -1.0 ! (Parent)
! FE-58 = -1.0, 1.0 ! (Child) !END!
! CO-60 = 166235716.8, -1.0 ! (Parent)
! NI-60 = -1.0, 1.0 ! (Child) !END!
! KR-85 = 339201216.0, -1.0 ! (Parent)
! RB-85 = -1.0, 1.0 ! (Child) !END!
! I-131 = 692988.48, -1.0 ! 9-85 (Parent)
! XE-131 = -1.0, .98824 ! (Child)
! XE-131M = -1.0, .011759 ! (Child) !END!