# The Radiation (Emergency Preparedness and Public Information) Regulations 2019, Part 1: Table of radionuclides Extent: E+W+S Radionuclide Form Activity (Bq) Actinium Ac-224 2 x 1011 Ac-225 3 x 1009 Ac-226 2 x 1010 Ac-227 5 x 1007 Ac-228 7 x 1011 Aluminium Al-26 6 x 1011 Americium Am-237 2 x 1014 Am-238 9 x 1013 Am-239 3 x 1013 Am-240 1 x 1013 Am-241 3 x 1008 Am-242 1 x 1012 Am-242m 3 x 1008 Am-243 3 x 1008 Am-244 7 x 1012 Am-244m 2 x 1014 Am-245 1 x 1014 Am-246 9 x 1013 Am-246m 1 x 1014 Antimony Sb-115 2 x 1014 Sb-116 9 x 1013 Sb-116m 4 x 1013 Sb-117 3 x 1014 Sb-118m 3 x 1013 Sb-119 1 x 1014 Sb-120 3 x 1014 Sb-120m 7 x 1012 Sb-122 5 x 1012 Sb-124 2 x 1012 Sb-124n 1 x 1015 Sb-125 2 x 1012 Sb-126 3 x 1012 Sb-126m 1 x 1014 Sb-127 4 x 1012 Sb-128 1 x 1013 Sb-128m 1 x 1014 Sb-129 2 x 1013 Sb-130 4 x 1013 Sb-131 5 x 1013 Argon Ar-37 2 x 1020 Ar-39 4 x 1016 Ar-41 7 x 1013 Arsenic As-69 1 x 1014 As-70 3 x 1013 As-71 2 x 1013 As-72 5 x 1012 As-73 2 x 1013 As-74 5 x 1012 As-76 5 x 1012 As-77 2 x 1013 As-78 3 x 1013 Astatine At-207 1 x 1013 At-211 2 x 1011 Barium Ba-126 3 x 1013 Ba-128 4 x 1012 Ba-131 1 x 1013 Ba-131m 1 x 1015 Ba-133 2 x 1012 Ba-133m 1 x 1013 Ba-135m 2 x 1013 Ba-139 7 x 1013 Ba-140 3 x 1012 Ba-141 1 x 1014 Ba-142 2 x 1014 Berkelium Bk-245 9 x 1012 Bk-246 2 x 1013 Bk-247 4 x 1008 Bk-249 2 x 1011 Bk-250 2 x 1013 Beryllium Be-7 2 x 1014 Be-10 8 x 1011 Bismuth Bi-200 6 x 1013 Bi-201 4 x 1013 Bi-202 4 x 1013 Bi-203 2 x 1013 Bi-205 8 x 1012 Bi-206 4 x 1012 Bi-207 2 x 1012 Bi-210 3 x 1011 Bi-210m 8 x 1009 Bi-212 1 x 1012 Bi-213 1 x 1012 Bi-214 3 x 1012 Bromine Br-74 3 x 1013 Br-74m 3 x 1013 Br-75 6 x 1013 Br-76 1 x 1013 Br-77 8 x 1013 Br-80 3 x 1014 Br-80m 7 x 1013 Br-82 1 x 1013 Br-83 1 x 1014 Br-84 6 x 1013 Cadmium Cd-104 2 x 1014 Cd-107 1 x 1014 Cd-109 2 x 1012 Cd-113 2 x 1011 Cd-113m 2 x 1011 Cd-115 6 x 1012 Cd-115m 2 x 1012 Cd-117 3 x 1013 Cd-117m 2 x 1013 Caesium Cs-125 1 x 1014 Cs-127 2 x 1014 Cs-129 1 x 1014 Cs-130 2 x 1014 Cs-131 2 x 1014 Cs-132 2 x 1013 Cs-134 4 x 1011 Cs-134m 2 x 1014 Cs-135 3 x 1012 Cs-135m 1 x 1014 Cs-136 5 x 1012 Cs-137 4 x 1011 Cs-138 5 x 1013 Calcium Ca-41 6 x 1013 Ca-45 2 x 1012 Ca-47 2 x 1012 Californium Cf-244 3 x 1012 Cf-246 6 x 1010 Cf-248 3 x 1009 Cf-249 4 x 1008 Cf-250 9 x 1008 Cf-251 4 x 1008 Cf-252 1 x 1009 Cf-253 2 x 1010 Cf-254 5 x 1008 Carbon C-11 2 x 1014 carbon dioxide 2 x 1014 carbon monoxide 3 x 1014 methane 3 x 1014 vapour 2 x 1014 C-14 5 x 1012 carbon dioxide 3 x 1012 carbon monoxide 3 x 1012 methane 3 x 1012 vapour 3 x 1012 Cerium Ce-134 3 x 1012 Ce-135 1 x 1013 Ce-137 3 x 1014 Ce-137m 1 x 1013 Ce-139 9 x 1012 Ce-141 5 x 1012 Ce-143 7 x 1012 Ce-144 4 x 1011 Chlorine Cl-36 3 x 1012 Cl-38 5 x 1013 Cl-39 6 x 1013 Chromium Cr-48 4 x 1013 Cr-49 9 x 1013 Cr-51 2 x 1014 Cobalt Co-55 9 x 1012 Co-56 1 x 1012 Co-57 1 x 1013 Co-58 5 x 1012 Co-58m 4 x 1014 Co-60 6 x 1011 Co-60m 5 x 1015 Co-61 1 x 1014 Co-62m 7 x 1013 Copper Cu-60 4 x 1013 Cu-61 5 x 1013 Cu-64 6 x 1013 Cu-67 2 x 1013 Curium Cm-238 6 x 1012 Cm-240 8 x 1009 Cm-241 7 x 1011 Cm-242 5 x 1009 Cm-243 4 x 1008 Cm-244 5 x 1008 Cm-245 3 x 1008 Cm-246 3 x 1008 Cm-247 3 x 1008 Cm-248 8 x 1007 Cm-249 2 x 1014 Cm-250 1 x 1007 Dysprosium Dy-155 6 x 1013 Dy-157 1 x 1014 Dy-159 4 x 1013 Dy-165 7 x 1013 Dy-166 5 x 1012 Einsteinium Es-250m 4 x 1013 Es-251 1 x 1013 Es-253 1 x 1010 Es-254 3 x 1009 Es-254m 6 x 1010 Erbium Er-161 7 x 1013 Er-165 5 x 1014 Er-169 1 x 1013 Er-171 2 x 1013 Er-172 8 x 1012 Europium Eu-145 1 x 1013 Eu-146 7 x 1012 Eu-147 1 x 1013 Eu-148 3 x 1012 Eu-149 4 x 1013 Eu-150 5 x 1011 Eu-150m 2 x 1013 Eu-152 6 x 1011 Eu-152m 2 x 1013 Eu-154 5 x 1011 Eu-155 4 x 1012 Eu-156 3 x 1012 Eu-157 1 x 1013 Eu-158 6 x 1013 Fermium Fm-252 9 x 1010 Fm-253 7 x 1010 Fm-254 4 x 1011 Fm-255 1 x 1011 Fm-257 3 x 1009 Fluorine F-18 8 x 1013 Francium Fr-222 3 x 1012 Fr-223 4 x 1012 Gadolinium Gd-145 7 x 1013 Gd-146 3 x 1012 Gd-147 1 x 1013 Gd-148 1 x 1009 Gd-149 1 x 1013 Gd-151 1 x 1013 Gd-152 2 x 1009 Gd-153 7 x 1012 Gd-159 2 x 1013 Gallium Ga-65 1 x 1014 Ga-66 7 x 1012 Ga-67 4 x 1013 Ga-68 6 x 1013 Ga-70 3 x 1014 Ga-72 8 x 1012 Ga-73 3 x 1013 Germanium Ge-66 7 x 1013 Ge-67 9 x 1013 Ge-68 2 x 1012 Ge-69 3 x 1013 Ge-71 6 x 1014 Ge-75 2 x 1014 Ge-77 2 x 1013 Ge-78 7 x 1013 Gold Au-193 6 x 1013 Au-194 2 x 1013 Au-195 1 x 1013 Au-198 7 x 1012 Au-198m 6 x 1012 Au-199 2 x 1013 Au-200 1 x 1014 Au-200m 8 x 1012 Au-201 3 x 1014 Hafnium Hf-170 2 x 1013 Hf-172 7 x 1011 Hf-173 4 x 1013 Hf-175 1 x 1013 Hf-177m 5 x 1013 Hf-178m 1 x 1011 Hf-179m 4 x 1012 Hf-180m 4 x 1013 Hf-181 4 x 1012 Hf-182 1 x 1011 Hf-182m 1 x 1014 Hf-183 8 x 1013 Hf-184 2 x 1013 Holmium Ho-155 1 x 1014 Ho-157 4 x 1014 Ho-159 4 x 1014 Ho-161 6 x 1014 Ho-162 1 x 1015 Ho-162m 2 x 1014 Ho-164 7 x 1014 Ho-164m 5 x 1014 Ho-166 6 x 1012 Ho-166m 2 x 1011 Ho-167 7 x 1013 Hydrogen H-3 1 x 1014 organically bound tritium 3 x 1014 elemental gas 7 x 1014 tritiated methane 2 x 1015 tritiated water vapour 7 x 1014 Indium In-109 9 x 1013 In-110 3 x 1013 In-110m 5 x 1013 In-111 3 x 1013 In-112 5 x 1014 In-113m 2 x 1014 In-114 4 x 1015 In-114m 9 x 1011 In-115 7 x 1010 In-115m 8 x 1013 In-116m 5 x 1013 In-117 1 x 1014 In-117m 7 x 1013 In-119m 2 x 1014 Iodine I-120 2 x 1013 methyl iodide 2 x 1013 elemental 1 x 1013 I-120m 2 x 1013 methyl iodide 2 x 1013 elemental 2 x 1013 I-121 9 x 1013 methyl iodide 9 x 1013 elemental 8 x 1013 I-123 3 x 1013 methyl iodide 3 x 1013 elemental 3 x 1013 I-124 6 x 1011 methyl iodide 5 x 1011 elemental 4 x 1011 I-125 1 x 1012 methyl iodide 1 x 1012 elemental 8 x 1011 I-126 3 x 1011 methyl iodide 3 x 1011 elemental 2 x 1011 I-128 2 x 1014 methyl iodide 2 x 1014 elemental 2 x 1014 I-129 2 x 1011 methyl iodide 2 x 1011 elemental 1 x 1011 I-130 3 x 1012 methyl iodide 3 x 1012 elemental 3 x 1012 I-131 3 x 1011 methyl iodide 2 x 1011 elemental 2 x 1011 I-132 4 x 1013 methyl iodide 3 x 1013 elemental 3 x 1013 I-132m 3 x 1013 methyl iodide 3 x 1013 elemental 2 x 1013 I-133 4 x 1012 methyl iodide 3 x 1012 elemental 2 x 1012 I-134 4 x 1013 methyl iodide 4 x 1013 elemental 4 x 1013 I-135 2 x 1013 methyl iodide 1 x 1013 elemental 1 x 1013 Iridium Ir-182 1 x 1014 Ir-184 3 x 1013 Ir-185 3 x 1013 Ir-186 2 x 1013 Ir-186m 7 x 1013 Ir-187 6 x 1013 Ir-188 1 x 1013 Ir-189 2 x 1013 Ir-190 5 x 1012 Ir-190m 1 x 1015 Ir-190n 8 x 1013 Ir-192 3 x 1012 Ir-192n 8 x 1011 Ir-193m 2 x 1013 Ir-194 6 x 1012 Ir-194m 1 x 1012 Ir-195 7 x 1013 Ir-195m 3 x 1013 Iron Fe-52 7 x 1012 Fe-55 2 x 1013 Fe-59 3 x 1012 Fe-60 8 x 1010 Krypton Kr-74 2 x 1014 Kr-76 2 x 1014 Kr-77 1 x 1014 Kr-79 4 x 1014 Kr-81 3 x 1016 Kr-81m 7 x 1016 Kr-83m 3 x 1018 Kr-85 2 x 1016 Kr-85m 6 x 1014 Kr-87 1 x 1014 Kr-88 5 x 1013 Lanthanum La-131 1 x 1014 La-132 2 x 1013 La-135 3 x 1014 La-137 3 x 1012 La-138 2 x 1011 La-140 1 x 1013 La-141 2 x 1013 La-142 3 x 1013 La-143 2 x 1014 Lead Pb-195m 1 x 1014 Pb-198 8 x 1013 Pb-199 9 x 1013 Pb-200 2 x 1013 Pb-201 5 x 1013 Pb-202 2 x 1012 Pb-202m 4 x 1013 Pb-203 3 x 1013 Pb-205 3 x 1013 Pb-209 1 x 1014 Pb-210 5 x 1009 Pb-211 2 x 1012 Pb-212 1 x 1011 Pb-214 3 x 1012 Lutetium Lu-169 2 x 1013 Lu-170 9 x 1012 Lu-171 1 x 1013 Lu-172 6 x 1012 Lu-173 7 x 1012 Lu-174 5 x 1012 Lu-174m 5 x 1012 Lu-176 4 x 1011 Lu-176m 5 x 1013 Lu-177 1 x 1013 Lu-177m 1 x 1012 Lu-178 2 x 1014 Lu-178m 1 x 1014 Lu-179 4 x 1013 Magnesium Mg-28 4 x 1012 Manganese Mn-51 7 x 1013 Mn-52 5 x 1012 Mn-52m 6 x 1013 Mn-53 2 x 1014 Mn-54 4 x 1012 Mn-56 3 x 1013 Mendelevium Md-257 1 x 1012 Md-258 4 x 1009 Mercury Hg-193 inorganic 6 x 1013 organic 8 x 1013 vapour 2 x 1013 Hg-193m inorganic 2 x 1013 organic 3 x 1013 vapour 7 x 1012 Hg-194 inorganic 2 x 1012 organic 9 x 1011 vapour 7 x 1011 Hg-195 inorganic 8 x 1013 organic 1 x 1014 vapour 2 x 1013 Hg-195m inorganic 1 x 1013 organic 2 x 1013 vapour 3 x 1012 Hg-197 inorganic 3 x 1013 organic 5 x 1013 vapour 6 x 1012 Hg-197m inorganic 1 x 1013 organic 2 x 1013 vapour 4 x 1012 Hg-199m inorganic 2 x 1014 organic 2 x 1014 vapour 1 x 1014 Hg-203 inorganic 8 x 1012 organic 8 x 1012 vapour 3 x 1012 Molybdenum Mo-90 2 x 1013 Mo-93 6 x 1012 Mo-93m 3 x 1013 Mo-99 1 x 1013 Mo-101 1 x 1014 Neodymium Nd-136 9 x 1013 Nd-138 1 x 1013 Nd-139 2 x 1014 Nd-139m 3 x 1013 Nd-141 8 x 1014 Nd-147 6 x 1012 Nd-149 6 x 1013 Nd-151 2 x 1014 Neon Ne-19 1 x 1016 Neptunium Np-232 2 x 1014 Np-233 2 x 1015 Np-234 1 x 1013 Np-235 3 x 1013 Np-236 4 x 1009 Np-236m 3 x 1012 Np-237 6 x 1008 Np-238 6 x 1012 Np-239 9 x 1012 Np-240 6 x 1013 Nickel Ni-56 9 x 1012 nickel carbonyl 9 x 1012 Ni-57 1 x 1013 nickel carbonyl 1 x 1013 Ni-59 6 x 1013 nickel carbonyl 3 x 1013 Ni-63 2 x 1013 nickel carbonyl 1 x 1013 Ni-65 4 x 1013 nickel carbonyl 3 x 1013 Ni-66 3 x 1012 nickel carbonyl 3 x 1012 Nitrogen N-13 gas 4 x 1014 Niobium Nb-88 5 x 1013 Nb-89 2 x 1013 Nb-89m 5 x 1013 Nb-90 7 x 1012 Nb-93m 1 x 1013 Nb-94 5 x 1011 Nb-95 9 x 1012 Nb-95m 1 x 1013 Nb-96 8 x 1012 Nb-97 9 x 1013 Nb-98m 4 x 1013 Osmium Os-180 5 x 1014 Os-181 6 x 1013 Os-182 2 x 1013 Os-185 7 x 1012 Os-189m 4 x 1014 Os-191 9 x 1012 Os-191m 7 x 1013 Os-193 1 x 1013 Os-194 3 x 1011 Oxygen O-15 gas 2 x 1015 Palladium Pd-100 1 x 1013 Pd-101 8 x 1013 Pd-103 3 x 1013 Pd-107 5 x 1013 Pd-109 1 x 1013 Phosphorus P-32 7 x 1011 P-33 4 x 1012 Platinum Pt-186 8 x 1013 Pt-188 1 x 1013 Pt-189 7 x 1013 Pt-191 3 x 1013 Pt-193 2 x 1014 Pt-193m 2 x 1013 Pt-195m 1 x 1013 Pt-197 2 x 1013 Pt-197m 1 x 1014 Pt-199 2 x 1014 Pt-200 8 x 1012 Plutonium Pu-234 1 x 1012 Pu-235 2 x 1015 Pu-236 8 x 1008 Pu-237 4 x 1013 Pu-238 3 x 1008 Pu-239 3 x 1008 Pu-240 3 x 1008 Pu-241 1 x 1010 Pu-242 3 x 1008 Pu-243 8 x 1013 Pu-244 3 x 1008 Pu-245 1 x 1013 Pu-246 2 x 1012 Polonium Po-203 8 x 1013 Po-205 7 x 1013 Po-206 1 x 1011 Po-207 5 x 1013 Po-208 3 x 1009 Po-209 2 x 1009 Po-210 4 x 1009 Potassium K-40 1 x 1012 K-42 2 x 1013 K-43 3 x 1013 K-44 5 x 1013 K-45 8 x 1013 Praseodymium Pr-136 1 x 1014 Pr-137 1 x 1014 Pr-138m 4 x 1013 Pr-139 2 x 1014 Pr-142 6 x 1012 Pr-142m 6 x 1014 Pr-143 5 x 1012 Pr-144 2 x 1014 Pr-145 2 x 1013 Pr-147 2 x 1014 Promethium Pm-141 2 x 1014 Pm-143 9 x 1012 Pm-144 2 x 1012 Pm-145 8 x 1012 Pm-146 1 x 1012 Pm-147 5 x 1012 Pm-148 3 x 1012 Pm-148m 2 x 1012 Pm-149 8 x 1012 Pm-150 3 x 1013 Pm-151 1 x 1013 Protactinium Pa-227 4 x 1011 Pa-228 4 x 1011 Pa-230 4 x 1010 Pa-231 2 x 1008 Pa-232 3 x 1012 Pa-233 5 x 1012 Pa-234 1 x 1013 Radium Ra-223 3 x 1009 Ra-224 8 x 1009 Ra-225 4 x 1009 Ra-226 3 x 1009 Ra-227 6 x 1013 Ra-228 2 x 1009 Rhenium Re-177 5 x 1014 Re-178 1 x 1014 Re-181 2 x 1013 Re-182 5 x 1012 Re-182m 3 x 1013 Re-184 6 x 1012 Re-184m 3 x 1012 Re-186 5 x 1012 Re-186m 2 x 1012 Re-187 1 x 1015 Re-188 6 x 1012 Re-188m 3 x 1014 Re-189 1 x 1013 Rhodium Rh-99 1 x 1013 Rh-99m 9 x 1013 Rh-100 1 x 1013 Rh-101 4 x 1012 Rh-101m 4 x 1013 Rh-102 2 x 1012 Rh-102m 9 x 1011 Rh-103m 2 x 1015 Rh-105 2 x 1013 Rh-106m 3 x 1013 Rh-107 3 x 1014 Rubidium Rb-79 9 x 1013 Rb-81 9 x 1013 Rb-81m 8 x 1014 Rb-82m 3 x 1013 Rb-83 6 x 1012 Rb-84 4 x 1012 Rb-86 3 x 1012 Rb-87 6 x 1012 Rb-88 9 x 1013 Rb-89 8 x 1013 Ruthenium Ru-94 9 x 1013 ruthenium tetroxide 8 x 1013 Ru-97 6 x 1013 ruthenium tetroxide 6 x 1013 Ru-103 7 x 1012 ruthenium tetroxide 1 x 1013 Ru-105 3 x 1013 ruthenium tetroxide 3 x 1013 Ru-106 4 x 1011 ruthenium tetroxide 8 x 1011 Samarium Sm-141 1 x 1014 Sm-141m 7 x 1013 Sm-142 5 x 1013 Sm-145 1 x 1013 Sm-146 3 x 1009 Sm-147 3 x 1009 Sm-151 7 x 1012 Sm-153 1 x 1013 Sm-155 3 x 1014 Sm-156 3 x 1013 Scandium Sc-43 4 x 1013 Sc-44 2 x 1013 Sc-44m 4 x 1012 Sc-46 2 x 1012 Sc-47 1 x 1013 Sc-48 5 x 1012 Sc-49 1 x 1014 Selenium Se-70 6 x 1013 Se-73 3 x 1013 Se-73m 2 x 1014 Se-75 4 x 1012 Se-79 2 x 1012 Se-81 3 x 1014 Se-81m 1 x 1014 Se-83 6 x 1013 Silicon Si-31 6 x 1013 Si-32 3 x 1011 Silver Ag-102 7 x 1013 Ag-103 1 x 1014 Ag-104 5 x 1013 Ag-104m 7 x 1013 Ag-105 1 x 1013 Ag-106 2 x 1014 Ag-106m 6 x 1012 Ag-108m 6 x 1011 Ag-110m 1 x 1012 Ag-111 6 x 1012 Ag-112 2 x 1013 Ag-115 1 x 1014 Sodium Na-22 1 x 1012 Na-24 1 x 1013 Strontium Sr-80 3 x 1013 Sr-81 8 x 1013 Sr-82 1 x 1012 Sr-83 2 x 1013 Sr-85 1 x 1013 Sr-85m 6 x 1014 Sr-87m 2 x 1014 Sr-89 2 x 1012 Sr-90 2 x 1011 Sr-91 1 x 1013 Sr-92 2 x 1013 Sulphur S-35 inorganic 1 x 1013 organic 1 x 1013 gas / vapour 1 x 1011 Tantalum Ta-172 7 x 1013 Ta-173 4 x 1013 Ta-174 8 x 1013 Ta-175 4 x 1013 Ta-176 2 x 1013 Ta-177 7 x 1013 Ta-178m 7 x 1013 Ta-179 3 x 1013 Ta-180 1 x 1014 Ta-182 2 x 1012 Ta-182m 4 x 1014 Ta-183 5 x 1012 Ta-184 1 x 1013 Ta-185 1 x 1014 Ta-186 1 x 1014 Technetium Tc-93 7 x 1013 Tc-93m 1 x 1014 Tc-94 3 x 1013 Tc-94m 5 x 1013 Tc-95 4 x 1013 Tc-95m 8 x 1012 Tc-96 8 x 1012 Tc-96m 7 x 1014 Tc-97 2 x 1013 Tc-97m 6 x 1012 Tc-98 5 x 1011 Tc-99 2 x 1012 Tc-99m 3 x 1014 Tc-101 3 x 1014 Tc-104 6 x 1013 Tellurium Te-116 5 x 1013 vapour 6 x 1013 Te-121 2 x 1013 vapour 2 x 1013 Te-121m 3 x 1012 vapour 2 x 1012 Te-123 4 x 1012 vapour 2 x 1012 Te-123m 4 x 1012 vapour 3 x 1012 Te-125m 5 x 1012 vapour 6 x 1012 Te-127 4 x 1013 vapour 5 x 1013 Te-127m 2 x 1012 vapour 2 x 1012 Te-129 1 x 1014 vapour 1 x 1014 Te-129m 2 x 1012 vapour 2 x 1012 Te-131 9 x 1013 vapour 8 x 1013 Te-131m 4 x 1012 vapour 3 x 1012 Te-132 4 x 1012 vapour 2 x 1012 Te-133 8 x 1013 vapour 8 x 1013 Te-133m 2 x 1013 vapour 2 x 1013 Te-134 6 x 1013 vapour 6 x 1013 Terbium Tb-147 3 x 1013 Tb-149 5 x 1012 Tb-150 2 x 1013 Tb-151 2 x 1013 Tb-153 1 x 1013 Tb-154 1 x 1013 Tb-155 4 x 1013 Tb-156 7 x 1012 Tb-156m 5 x 1013 Tb-156n 9 x 1013 Tb-157 2 x 1013 Tb-158 6 x 1011 Tb-160 2 x 1012 Tb-161 9 x 1012 Thallium Tl-194 2 x 1014 Tl-194m 7 x 1013 Tl-195 1 x 1014 Tl-197 2 x 1014 Tl-198 5 x 1013 Tl-198m 7 x 1013 Tl-199 2 x 1014 Tl-200 3 x 1013 Tl-201 9 x 1013 Tl-202 2 x 1013 Tl-204 6 x 1012 Thorium Th-226 6 x 1011 Th-227 3 x 1009 Th-228 7 x 1008 Th-229 1 x 1008 Th-230 3 x 1008 Th-231 2 x 1013 Th-232 3 x 1008 Th-234 2 x 1012 Thulium Tm-162 9 x 1013 Tm-166 2 x 1013 Tm-167 1 x 1013 Tm-170 2 x 1012 Tm-171 2 x 1013 Tm-172 5 x 1012 Tm-173 3 x 1013 Tm-175 2 x 1014 Tin Sn-110 3 x 1013 Sn-111 2 x 1014 Sn-113 6 x 1012 Sn-117m 7 x 1012 Sn-119m 9 x 1012 Sn-121 3 x 1013 Sn-121m 5 x 1012 Sn-123 2 x 1012 Sn-123m 2 x 1014 Sn-125 2 x 1012 Sn-126 8 x 1011 Sn-127 3 x 1013 Sn-128 5 x 1013 Titanium Ti-44 2 x 1011 Ti-45 4 x 1013 Tungsten W-176 1 x 1014 W-177 9 x 1013 W-178 5 x 1013 W-179 2 x 1015 W-181 9 x 1013 W-185 2 x 1013 W-187 1 x 1013 W-188 4 x 1012 Uranium U-230 2 x 1009 U-231 2 x 1013 U-232 8 x 1008 U-233 3 x 1009 U-234 3 x 1009 U-235 3 x 1009 U-236 3 x 1009 U-237 8 x 1012 U-238 4 x 1009 U-239 3 x 1014 U-240 8 x 1012 Vanadium V-47 9 x 1013 V-48 3 x 1012 V-49 3 x 1014 Xenon Xe-120 3 x 1014 Xe-121 7 x 1013 Xe-122 2 x 1015 Xe-123 2 x 1014 Xe-125 4 x 1014 Xe-127 4 x 1014 Xe-129m 4 x 1015 Xe-131m 1 x 1016 Xe-133 3 x 1015 Xe-133m 3 x 1015 Xe-135 4 x 1014 Xe-135m 4 x 1014 Xe-138 1 x 1014 Ytterbium Yb-162 3 x 1014 Yb-166 1 x 1013 Yb-167 6 x 1014 Yb-169 6 x 1012 Yb-175 2 x 1013 Yb-177 8 x 1013 Yb-178 7 x 1013 Yttrium Y-86 9 x 1012 Y-86m 2 x 1014 Y-87 2 x 1013 Y-88 2 x 1012 Y-90 3 x 1012 Y-90m 4 x 1013 Y-91 2 x 1012 Y-91m 3 x 1014 Y-92 2 x 1013 Y-93 7 x 1012 Y-94 9 x 1013 Y-95 1 x 1014 Zinc Zn-62 9 x 1012 Zn-63 7 x 1013 Zn-65 3 x 1012 Zn-69 2 x 1014 Zn-69m 2 x 1013 Zn-71m 3 x 1013 Zn-72 6 x 1012 Zirconium Zr-86 1 x 1013 Zr-88 6 x 1012 Zr-89 1 x 1013 Zr-93 1 x 1012 Zr-95 3 x 1012 Zr-97 4 x 1012 --- Source: https://www.legislation.gov.uk/uksi/2019/703/schedule/1/part/1 (the official version) Page: https://openlegislation.uk/radiation-emergency-preparedness-and-public-information-regulations-2019/schedule-1/part-1 Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.