From: A review on mathematical models for estimating indoor radon concentrations
Symbol | Unit | Description |
---|---|---|
C bm | Bq/m3 | Radon concentration in building material (BM) |
C i | Bq/m3 | Indoor radon concentration |
C o | Bq/m3 | Radon concentration of outdoor air |
C s | Bq/m3 | Radon concentration in soil |
C w | Bq/m3 | Radon concentration in water supply |
F s | Bq/(m2 · s) | Total radon flux from soil into building |
k a | m/(s · Pa) | Advection transfer coefficient of soil |
k d,bm | m/s | Diffusion transfer coefficient of BM |
k d,s | m/s | Diffusion transfer coefficient of soil |
q ij | m3/s | Air current from compartment i to compartment j |
S bm | m2 | Indoor surface area of radon containing BM |
S g | m2 | Building area towards ground |
t w | dimensionless | Radon transfer efficiency of water supply |
U w | m3/s | Use rate of water |
V | m3 | Volume of the indoor |
ΔP s − i | Pa | Soil-indoor pressure difference |
λ | 1/s | Radon decay constant |
λ v | 1/s | Ventilation rate |