Investigations of outdoor and indoor 222Rn concentrations level in academic building at Universiti Malaysia Kelantan Jeli campus

Radon (222Rn) is radioactive gas emanates from soil, rock sand and enter the building
through cracks, construction joint, gas in suspended floors and also from the building materials
itself. 222Rn gas in high concentrations is hazardous as it can affect the human organ and tissues due
to the emission of alpha particles. This study aims to determine the outdoor and indoor 222Rn
concentrations in academic building, Universiti Malaysia Kelantan (UMK) Jeli Campus as well as
to identify any possible factors influenced the gas progenies. Radon Sentinel 1030 was placed in
open space between the lecturer’s rooms and inside closed room (Lecture Hall 4) on the first floor
of the building for data collections. The total of 224 data of 222Rn concentrations reading has been
collected for outdoor and indoor spaces with 0.5 hours time interval. The outdoor and indoor 222Rn
concentrations were found in ranges between 0.23 pCi/L to 0.48 pCi/L and 0.73 pCi/L to
1.13 pCi/L, respectively.