Fukushima Dose with emissions in post-processing


  • Configure the model for two surrogate species:
    1. Non-depositing noble gas (NGAS)
    2. Depositing small particle (RNUC)
  • Assign both to the same computational particle
  • Run the calculation for a continuous unit emission with NO decay
  • Concentration, deposition, and decay are from the post-processing step
    • pgm = con2rem



japan/dose_control.txt

   load control file

japan/dose_setup.txt

   load setup file



11 03 11 12

   simulation start

37.4206 141.0329 100.0

   start location

108

   run duration

gdas11-22.bin

   meteorology file

RNUC NGAS

   emission species

1.0

   emission rate

24.0

   emission duration

11 03 14 12 00

   emission start time

0.05 0.05

   sampling resolution

0 500

   sampling layers

11 03 14 12 00

   sampling start time

00 36 00

   sampling duration

1.0 1.0 1.0

   particulate

0.001 0.0 0.0 0.0 0.0

   dry deposition

0.0 8.0E-05 8.0E-05

   wet deposition

numpar = 12000

   particle number

maxpar = 12000

   maximum particles

maxdim = 2

   species per particle



Run Model


Apply emissions and dose conversion factors

  • In post processing each radionuclide in activity file is assigned a surrogate species
  • Activity file can be modified for each phase of the accident
  • No limit to the number of radionuclides assigned



Cloud-shine and Ground-shine

  • Total air and ground dose computed (1 REM = 10 mSV)
  • 3D particle near source results are sensitive to grid size
  • Note the dependence of deposition to the resolution of the precipitation field
  • Previous examples all used a constant emission rate
  • For time-varying emissions create a transfer coefficient matrix
  • One run per emission cycle, then CONDECAY followed by CON2REM
  • See the advanced tutorial for more detailed scripting instructions