Long-Range I-131 from Fukushima


  • Assume that most of the I-131 emissions occurred during the venting
    and explosion at Unit #2 for 24 h from 1200 UTC on March 14th 2011
  • The total I-131 emitted has been reported to be about 150 PBq
    converts to an hourly rate of about 5 PBq



japan_control.txt

   load control file

japan_setup.txt

   load setup file



11 03 14 00

   start time

196

   run duration

37.4206 141.0329 100.0

   source

RP201103.bin

   data file

I131

   pollutant name

5.0E+15

   emission rate

24.0

   emission duration

11 03 14 12 00

   emission start time

0.0 0.0

   concentration grid

1.0 1.0

   grid resolution

181.0 360.0

   grid span

fukushima.bin

   output file

500

   layer depth

0.01

   dry deposition velocity

3.00

   Henry's constant

8.04

   half-life in days


NAMELIST: SETUP.CFG

delt=30

   force time step

numpar=27000

   particle number

maxpar=25000

   maximum number




Extract results at Dutch Harbor, AK

DHAK 53.903 -166.511

   Dutch Harbor, AK

Dutch_Harbor.txt

   measured data

fukushima1.txt

   model prediction


Re-run with high resolution meteorology

gdas11-22.bin

   meteorology file

fukushima2.txt

   model prediction