Modeling the radon build-up in a closed environment using developed OpenFOAM solver

Abstract

Modeling radon (²²²Rn) development in confined environments aids in predicting radon levels in dwellings and underground spaces, where radium ²²⁶Ra in building materials and soil emits radon gas via radioactive decay. Radon accumulates in poorly ventilated places, creating an inhalation hazard. In OpenFOAM, a C+ +-based computational tool, an existing heat conduction solver was adapted to simulate radon accumulation, considering radon's radioactive characteristics and material non-uniformity through which radon will permeate. The solver was validated against theoretical values in a one-dimensional system and then applied to study radon dispersion in containment, with potential for broader applications.