National Nuclear Energy Agency predicted that Indonesia has 70,000 tonnes of uranium reserves (from hypothetic category to definite category) and 170,000 tonnes thorium reserves (all in hypothetic category). Mostly Uranium found in West Kalimantan and the rest in Papua, Bangka Belitung and West Sulawesi, while Thorium found mostly in Bangka Belitung and the rest in West Kalimantan. In Mamuju Regency, West Sulawesi, Uranium is detected about 100–1.500 ppm (part per million) and Thorium about 400–1.800 ppm. Singkep district, Mamuju Regency has the highest Gamma Radiation in Indonesia.