Regulation 10 Column 1 Column 2 specified for the prescribed radionuclide— Prescribed radionuclide D-value Activity Level (GBq) Americium-241 60 Americium-241/Beryllium 60 Cadmium-109 2 × 104 Caesium-137 100 Californium-252 20 Cobalt-57 700 Cobalt-60 30 Curium-244 50 Gadolinium-153 1 × 103 Germanium-68 700 Gold-198 200 Iodine-125 200 Iodine-131 200
Regulation 10 Column 1 Prescribed radionuclide Column 2 specified for the prescribed radionuclide— D-value Activity Level (GBq) Americium-241 60 Americium-241/Beryllium 60 Cadmium-109 2 × 104 Caesium-137 100 Californium-252 20 Cobalt-57 700 Cobalt-60 30 Curium-244 50 Gadolinium-153 1 × 103 Germanium-68 700 Gold-198 200 Iodine-125 200 Iodine-131 200