Long-term dose estimation with con2rem
Posted: July 2nd, 2020, 7:48 am
Hysplit version: April 2018 release (SVN 951)
OS: WIN10
I am running a 48 h simulation where I-131 (particulate form) is released hourly during the first 24 h. I am trying to estimate the doses related to this release with a one year integration time. If I have understood correctly con2rem does this with a switch -x8760. I did test simulations where the switch was on and off, inhalation dose was not taken into account in either of the cases. Results for ~5 km distance from the source in the direction of the main plume are presented below (taken from the file produced by con2asc):
-x8760 off:
I13100000 = 2.95E-03 mSv
I13100005 = 1.66E-04 mSv
-x8760 on:
I13100000 = 3.23E-03 mSv
I13100005 = 4.61E-02 mSv
Below are the con2rem calls from the batch scripts:
-x8760 off:
%PGM%\exec\con2rem -iCG_10%%D%%H -oDG_10%%D%%H -s1 -c0 -t0 -d1 -e0 -q1 -aC:\...\activity_unit_I-131.txt
-x8760 on:
%PGM%\exec\con2rem -iCG_10%%D%%H -oDG_10%%D%%H -s1 -c0 -t0 -d1 -e0 -q1 -aC:\...\activity_unit_I-131.txt -x8760
When the integration time of one year is applied the doses increase for both groundshine (I13100000) and cloudshine (I13100005) but the increase is more pronounced in case of cloudshine (~two decades!). In the hysplit manual it is mentioned that in case of longer integration times (-x switch on) only the deposited activity is taken into account in dose calculation. Thus there seems to be a contradiction between what the manual says and what the results are.
Could you elaborate on the functionality of con2rem -x switch? Does it remove the activity during the time period (in this case a year) or does it assume constant activity? Why in this case the prolonged integration time is having an effect to the cloudshine dose?
Best regards
Juha-Pekka
OS: WIN10
I am running a 48 h simulation where I-131 (particulate form) is released hourly during the first 24 h. I am trying to estimate the doses related to this release with a one year integration time. If I have understood correctly con2rem does this with a switch -x8760. I did test simulations where the switch was on and off, inhalation dose was not taken into account in either of the cases. Results for ~5 km distance from the source in the direction of the main plume are presented below (taken from the file produced by con2asc):
-x8760 off:
I13100000 = 2.95E-03 mSv
I13100005 = 1.66E-04 mSv
-x8760 on:
I13100000 = 3.23E-03 mSv
I13100005 = 4.61E-02 mSv
Below are the con2rem calls from the batch scripts:
-x8760 off:
%PGM%\exec\con2rem -iCG_10%%D%%H -oDG_10%%D%%H -s1 -c0 -t0 -d1 -e0 -q1 -aC:\...\activity_unit_I-131.txt
-x8760 on:
%PGM%\exec\con2rem -iCG_10%%D%%H -oDG_10%%D%%H -s1 -c0 -t0 -d1 -e0 -q1 -aC:\...\activity_unit_I-131.txt -x8760
When the integration time of one year is applied the doses increase for both groundshine (I13100000) and cloudshine (I13100005) but the increase is more pronounced in case of cloudshine (~two decades!). In the hysplit manual it is mentioned that in case of longer integration times (-x switch on) only the deposited activity is taken into account in dose calculation. Thus there seems to be a contradiction between what the manual says and what the results are.
Could you elaborate on the functionality of con2rem -x switch? Does it remove the activity during the time period (in this case a year) or does it assume constant activity? Why in this case the prolonged integration time is having an effect to the cloudshine dose?
Best regards
Juha-Pekka