Element* | Radionuclide** | Category |
---|---|---|
Actinium (89) | Ac-227 Ac-228 |
I I |
Americium (95) | Am-241 Am-243 |
I I |
Antimony (51) | Sb-122 Sb-124 Sb-125 |
IV III III |
Argon (18) | Ar-37 Ar-41 Ar-41 (uncompressed)† |
VI II V |
Arsenic (33) | As-73 As-74 As-76 As-77 |
IV IV IV IV |
Astatine (85) | Ar-211 | III |
Barium (56) | Ba-131 Ba-133 Ba-140 |
IV II III |
Berkelium (97) | Bk-249 | I |
Beryllium (4) | Be-7 | IV |
Bismuth (83) | Bi-206 Bi-207 Bi-210 Bi-212 |
IV III II III |
Bromine (35) | Br-82 | IV |
Cadmium (48) | Cd-109 Cd-115m Cd-115 |
IV III IV |
Calcium (20) | Ca-45 Ca-47 |
IV IV |
Californium (98) | Cf-249 Cf-250 Cf-252 |
I I I |
Carbon (6) | C-14 | IV |
Cerium (58) | Ce-141 Ce-143 Ce-144 |
IV IV III |
Cesium (55) | Cs-131 Cs-134m Cs-134 Cs-135 Cs-136 Cs-137 |
IV III III IV IV III |
Chlorine (17) | Cl-36 Cl-38 |
III IV |
Chromium (24) | Cr-51 | IV |
Cobalt (27) | Co-56 Co-57 Co-58m Co-58 Co-60 |
III IV IV IV III |
Copper (29) | Cu-64 | IV |
Curium (96) | Cm-242 Cm-243 Cm-244 Cm-245 Cm-246 |
I I I I I |
Dysprosium (66) | Dy-154 Dy-165 Dy-166 |
III IV IV |
Erbium (68) | Er-169 Er-171 |
IV IV |
Europium (63) | Eu-150 Eu-152m Eu-152 Eu-154 Eu-155 |
III IV III II IV |
Florine (9) | F-18 | IV |
Gadolinium (64) | Gd-153 Gd-159 |
IV IV |
Galium (31) | Ga-67 Ga-72 |
III IV |
Germanium (32) | Ge-71 | IV |
Gold (79) | Au-193 Au-194 Au-195 Au-196 Au-198 Au-199 |
III III III IV IV IV |
Hafnium (72) | Hf-181 | IV |
Holmium (67) | Ho-166 | IV |
Hydrogen (1) | H-3 (see tritium) | |
Indium (49) | In-113m In-114m In-115m In-115 |
IV III IV IV |
Iodine (53) | I-124 I-125 I-126 I-129 I-131 I-132 I-133 I-134 I-135 |
III III III III III IV III IV IV |
Iridium (77) | Ir-190 Ir-192 Ir-194 |
IV III IV |
Iron (26) | Fe-55 Fe-59 |
IV IV |
Krypton (36) | Kr-85m Kr-85m (uncompresssed)† Kr-85 Kr-85 (uncompressed)† Kr-87 Kr-87 (uncompressed)† |
III V III VI II V |
Lanthanum (57) | La-140 | IV |
Lead (82) | Pb-203 Pb-210 Pb-212 |
IV II II |
Lutetium (71) | Lu-172 Lu-177 |
III IV |
Magnesium (12) | Mg-28 | III |
Manganese (25) | Mn-52 Mn-54 Mn-56 |
IV IV IV |
Mercury (80) | Hg-197m Hg-197 Hg-203 |
IV IV IV |
Mixed fission products (MFP) |
II | |
Molybdenum (42) | Mo-99 | IV |
Neodymium (60) | Nd-147 Nd-149 |
IV IV |
Neptunium (93) | Np-237 Np-239 |
I I |
Nickel (28) | Ni-56 Ni-59 Ni-63 Ni-65 |
III IV IV IV |
Niobium (41) | Nb-93m Nb-95 Nb-97 |
IV IV IV |
Osmium (76) | Os-185 Os-191m Os-191 Os-193 |
IV IV IV IV |
Palladium (46) | Pd-103 Pd-109 |
IV IV |
Phosphorus (15) | P-32 | IV |
Platinum (73) | Pt-191 Pt-193 Pt-193m Pt-197m Pt-197 |
IV IV IV IV IV |
Plutonium (94) | Pu-238 F Pu-239 F Pu-240 Pu-241 F Pu-242 |
I I I I I |
Polonium (84) | Po-210 | I |
Potassium (19) | K-42 K-43 |
IV III |
Praseodymium (59) | Pr-142 Pr-143 |
IV IV |
Promethium (61) | Pm-147 Pm-149 |
IV IV |
Protactinium (91) | Pa-230 Pa-231 Pa-233 |
I I II |
Radium (88) | Ra-223 Ra-224 Ra-226 Ra-228 |
II II I I |
Radon (86) | Rn-220 Rn-222 |
IV II |
Rhenium (75) | Re-183 Re-186 Re-187 Re-188 Re-Natural |
IV IV IV IV IV |
Rhodium (45) | Rh-103m Rh-105 |
IV IV |
Rubidium (37) | Rb-86 Rb-87 Rb-Natural |
IV IV IV |
Ruthenium (44) | Ru-97 Ru-103 Ru-105 Ru-106 |
IV IV IV III |
Samarium (62) | Sm-145 Sm-147 Sm-151 Sm-153 |
III III IV IV |
Scandium (21) | Sc-46 Sc-47 Sc-48 |
III IV IV |
Selenium (34) | Se-75 | IV |
Silicon (14) | Si-31 | IV |
Silver (47) | Ag-105 Ag-110m Ag-111 |
IV III IV |
Sodium (11) | Na-22 Na-24 |
III IV |
Strontium (38) | Sr-85m Sr-85 Sr-89 Sr-90 Sr-91 Sr-92 |
IV IV III II III IV |
Sulfur (16) | S-35 | IV |
Tantalum (73) | Ta-182 | III |
Technetium (43) | Tc-96m Tc-96 Tc-97m Tc-97 Tc-99m Tc-99 |
IV IV IV IV IV IV |
Tellurium (52) | Te-125m Te-127m Te-127 Te-129m Te-129 Te-131m Te-132 |
IV IV IV III IV III IV |
Terbium (65) | Tb-160 | III |
Thallium (81) | Tl-200 Tl-201 Tl-202 Tl-204 |
IV IV IV III |
Thorium (90) | Th-227 Th-228 Th-230 Th-231 Th-232 Th-234 Th-Natural |
II I I I III II III |
Thulium (69) | Tm-168 Tm-170 Tm-171 |
III III IV |
Tin (50) | Sn-113 Sn-117m Sn-121 Sn-125 |
IV III III IV |
Tritium (1) | H-3 H-3 (as a gas, as luminous paint, or adsorbed on solid material.) |
IV VII |
Tungsten (74) | W-181 W-185 W-187 |
IV IV IV |
Uranium (92) | U-230 U-232 U-233 F U-234 U-235 F U-236 U-238 U-Natural U-Enriched F U-Depleted |
II I II II III II III III III III |
Vanadium (23) | V-48 V-49 |
IV III |
Xenon (54) | Xe-125 Xe-131m Xe-131m (uncompressed)† Xe-133 Xe-133 (uncompressed)† Xe-135 Xe-135 (uncompressed)† |
III III V III VI II V |
Ytterbium (70) | Yb-175 | IV |
Yttrium (39) | Y-88 Y-90 Y-91m Y-91 Y-92 Y-93 |
III IV III III IV IV |
Zinc (30) | Zn-65 Zn-69m Zn-69 |
IV IV IV |
Zirconium (40) | Zr-93 Zr-95 Zr-97 |
IV III IV |
NOTE: For mixtures of radionuclides and for radionuclides not included in this subsection, see
subsection (b) of this section, waste processing and storage categories.
____________________________________
*Atomic number shown in parentheses.
** Atomic mass number shown after the element symbol.
F Fissile material.
m Metastable state.
† Uncompressed means at a pressure not exceeding 1 atmosphere.