- Problem #1 - In the previous dose calculation, we used a 5 km resolution concentration grid. Would the dose still be under-estimated if we used a finer concentration grid?
- Hint -
Edit and run the cust_dose batch file to use a 1 km by 250 m grid resolution.
- Solution -
5 km air dose versus
1 km air dose
5 km deposition dose versus
1 km deposition dose,
shows a factor of 5 to 10 increase in dose close to the source. More distant doses are about the same. Note the squares of on or off wet deposition resulting from the half-degree resolution of the meteorological model.
- Problem #2 -
There is some uncertainty regarding particle sizes for this event and a fraction of the radionuclides may have been emitted on much larger particles. Using the same configuration as in problem #1, recompute the doses using a deposition velocity of 1 cm/s rather than 0.1 cm/s.
- Hint - Edit the script cust_dose and rerun the calculation.
- Solution - Although the air dose is unchanged, the maximum deposition dose has almost doubled.