THE SIGNIFICANCE OF RADON GAS IN HUDAI GEOTHERMAL WATERS SANDIKLI AFYONKARAHISAR TURKEYMurat M. Sac1, Mustafa Afsin 2a, Aysen Davraz 3 Fatma Aksever4Zehra Karakas 5 M. Ali Hinis 6a. Corresponding author (mafsinbaglum@gmail.com)1Ege University, Institute of Nuclear Sciences Bornova, İzmir2Aksaray University, Dept. of Geological Engineering, Campus, Aksaray, Turkey. 3,4Suleyman Demirel University, Dept. of Geological Engineering, Campus, Isparta, Turkey. 5Ankara University, Dept. of Geological Engineering, Golbasi Campus, Ankara, Turkey6Aksaray University, Dept. of Civil Engineering, Campus, Aksaray, Turkey