Ismael Fuente, Carlos Sainz, Luis Quindós, Daniel Rábago, Isidoro Gutiérrez, Alicia Fernández, Raúl Rodríguez and Santiago Celaya Journal Atmosphere 2023, 14, 1536 https://doi.org/10.3390/atmos14101536 Control of Radon Flux of an Inactive Uranium Mill Facility in Spain