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 Code of Federal Regulations (Last Updated: May 6, 2024)
 Title 49 - Transportation
 Subtitle B - Other Regulations Relating to Transportation
 Chapter I - Pipeline and Hazardous Materials Safety Administration, Department of Transportation
 SubChapter C - Hazardous Materials Regulations
 Part 173 - Shippers - General Requirements for Shipments and Packagings
 Subpart I - Class 7 (Radioactive) Materials

  § 173.436 - Exempt material activity concentrations and exempt consignment activity limits for radionuclides.  

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  • § 173.436 Exempt material activity concentrations and exempt consignment activity limits for radionuclides.

    The Table of Exempt material activity concentrations and exempt consignment activity limits for radionuclides is as follows:

    Symbol of
    radionuclide     		Element and atomic number Activity concentration for exempt material
    (Bq/g)     		Activity concentration for exempt material
    (Ci/g)     		Activity limit for exempt consignment
    (Bq)     		Activity limit for exempt consignment
    (Ci)
    Ac-225 Actinium (89) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Ac-227 1.0 × 10−1 2.7 × 10−12 1.0 × 103 2.7 × 10−8
    Ac-228 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Ag-105 Silver (47) 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Ag-108m (b) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Ag-110m 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Ag-111 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Al-26 Aluminum (13) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Am-241 Americium (95) 1.0 2.7 × 10−11 1.0 × 104 2.7 × 10−7
    Am-242m (b) 1.0 2.7 × 10−11 1.0 × 104 2.7 × 10−7
    Am-243 (b) 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    Ar-37 Argon (18) 1.0 × 106 2.7 × 10−5 1.0 × 108 2.7 × 10−3
    Ar-39 1.0 × 107 2.7 × 10−4 1.0 × 104 2.7 × 10−7
    Ar-41 1.0 × 102 2.7 × 10−9 1.0 × 109 2.7 × 10−2
    As-72 Arsenic (33) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    As-73 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    As-74 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    As-76 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    As-77 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    At-211 Astatine (85) 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Au-193 Gold (79) 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Au-194 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Au-195 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Au-198 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Au-199 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Ba-131 Barium (56) 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Ba-133 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Ba-133m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Ba-140 (b) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Be-7 Beryllium (4) 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Be-10 1.0 × 104 2.7 × 10−7 1.0 × 106 2.7 × 10−5
    Bi-205 Bismuth (83) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Bi-206 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Bi-207 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Bi-210 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Bi-210m 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Bi-212 (b) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Bk-247 Berkelium (97) 1.0 2.7 × 10−11 1.0 × 104 2.7 × 10−7
    Bk-249 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Br-76 Bromine (35) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Br-77 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Br-82 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    C-11 Carbon (6) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    C-14 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    Ca-41 Calcium (20) 1.0 × 105 2.7 × 10−6 1.0 × 107 2.7 × 10−4
    Ca-45 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    Ca-47 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Cd-109 Cadmium (48) 1.0 × 104 2.7 × 10−7 1.0 × 106 2.7 × 10−5
    Cd-113m 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Cd-115 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Cd-115m 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Ce-139 Cerium (58) 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Ce-141 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Ce-143 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Ce-144 (b) 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Cf-248 Californium (98) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Cf-249 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    Cf-250 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Cf-251 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    Cf-252 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Cf-253 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Cf-254 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    Cl-36 Chlorine (17) 1.0 × 104 2.7 × 10−7 1.0 × 106 2.7 × 10−5
    Cl-38 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Cm-240 Curium (96) 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Cm-241 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Cm-242 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Cm-243 1.0 2.7 × 10−11 1.0 × 104 2.7 × 10−7
    Cm-244 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Cm-245 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    Cm-246 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    Cm-247 1.0 2.7 × 10−11 1.0 × 104 2.7 × 10−7
    Cm-248 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    Co-55 Cobalt (27) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Co-56 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Co-57 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Co-58 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Co-58m 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    Co-60 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Cr-51 Chromium (24) 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Cs-129 Cesium (55) 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Cs-131 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Cs-132 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Cs-134 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Cs-134m 1.0 × 103 2.7 × 10−8 1.0 × 105 2.7 × 10−6
    Cs-135 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    Cs-136 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Cs-137 (b) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Cu-64 Copper (29) 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Cu-67 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Dy-159 Dysprosium (66) 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Dy-165 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Dy-166 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Er-169 Erbium (68) 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    Er-171 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Eu-147 Europium (63) 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Eu-148 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Eu-149 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Eu-150 (short lived) 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Eu-150 (long lived) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Eu-152 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Eu-152m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Eu-154 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Eu-155 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Eu-156 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    F-18 Fluorine (9) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Fe-52 Iron (26) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Fe-55 1.0 × 104 2.7 × 10−7 1.0 × 106 2.7 × 10−5
    Fe-59 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Fe-60 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Ga-67 Gallium (31) 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Ga-68 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Ga-72 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Gd-146 Gadolinium (64) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Gd-148 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Gd-153 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Gd-159 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Ge-68 Germanium (32) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Ge-71 1.0 × 104 2.7 × 10−7 1.0 × 108 2.7 × 10−3
    Ge-77 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Hf-172 Hafnium (72) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Hf-175 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Hf-181 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Hf-182 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Hg-194 Mercury (80) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Hg-195m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Hg-197 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Hg-197m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Hg-203 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Ho-166 Holmium (67) 1.0 × 103 2.7 × 10−8 1.0 × 105 2.7 × 10−6
    Ho-166m 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    I-123 Iodine (53) 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    I-124 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    I-125 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    I-126 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    I-129 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    I-131 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    I-132 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    I-133 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    I-134 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    I-135 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    In-111 Indium (49) 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    In-113m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    In-114m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    In-115m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Ir-189 Iridium (77) 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Ir-190 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Ir-192 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Ir-194 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    K-40 Potassium (19) 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    K-42 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    K-43 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Kr-79 Krypton (36) 1.0 × 103 2.7 × 10−8 1.0 × 105 2.7 × 10−6
    Kr-81 Krypton (36) 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    Kr-85 1.0 × 105 2.7 × 10−6 1.0 × 104 2.7 × 10−7
    Kr-85m 1.0 × 103 2.7 × 10−8 1.0 × 1010 2.7 × 10−1
    Kr-87 1.0 × 102 2.7 × 10−9 1.0 × 109 2.7 × 10−2
    La-137 Lanthanum (57) 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    La-140 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Lu-172 Lutetium (71) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Lu-173 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Lu-174 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Lu-174m 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Lu-177 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Mg-28 Magnesium (12) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Mn-52 Manganese (25) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Mn-53 1.0 × 104 2.7 × 10−7 1.0 × 109 2.7 × 10−2
    Mn-54 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Mn-56 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Mo-93 Molybdenum (42) 1.0 × 103 2.7 × 10−8 1.0 × 108 2.7 × 10−3
    Mo-99 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    N-13 Nitrogen (7) 1.0 × 102 2.7 × 10−9 1.0 × 109 2.7 × 10−2
    Na-22 Sodium (11) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Na-24 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Nb-93m Niobium (41) 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    Nb-94 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Nb-95 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Nb-97 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Nd-147 Neodymium (60) 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Nd-149 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Ni-59 Nickel (28) 1.0 × 104 2.7 × 10−7 1.0 × 108 2.7 × 10−3
    Ni-63 1.0 × 105 2.7 × 10−6 1.0 × 108 2.7 × 10−3
    Ni-65 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Np-235 Neptunium (93) 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Np-236 (short-lived) 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Np-236 (long-lived) 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Np-237 (b) 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    Np-239 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Os-185 Osmium (76) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Os-191 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Os-191m 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Os-193 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Os-194 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    P-32 Phosphorus (15) 1.0 × 103 2.7 × 10−8 1.0 × 105 2.7 × 10−6
    P-33 1.0 × 105 2.7 × 10−6 1.0 × 108 2.7 × 10−3
    Pa-230 Protactinium (91) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Pa-231 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    Pa-233 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Pb-201 Lead (82) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Pb-202 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Pb-203 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Pb-205 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    Pb-210 (b) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Pb-212 (b) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Pd-103 Palladium (46) 1.0 × 103 2.7 × 10−8 1.0 × 108 2.7 × 10−3
    Pd-107 1.0 × 105 2.7 × 10−6 1.0 × 108 2.7 × 10−3
    Pd-109 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Pm-143 Promethium (61) 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Pm-144 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Pm-145 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Pm-147 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    Pm-148m 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Pm-149 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Pm-151 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Po-210 Polonium (84) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Pr-142 Praseodymium (59) 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Pr-143 1.0 × 104 2.7 × 10−7 1.0 × 106 2.7 × 10−5
    Pt-188 Platinum (78) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Pt-191 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Pt-193 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    Pt-193m 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Pt-195m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Pt-197 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Pt-197m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Pu-236 Plutonium (94) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Pu-237 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Pu-238 1.0 2.7 × 10−11 1.0 × 104 2.7 × 10−7
    Pu-239 1.0 2.7 × 10−11 1.0 × 104 2.7 × 10−7
    Pu-240 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    Pu-241 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Pu-242 1.0 2.7 × 10−11 1.0 × 104 2.7 × 10−7
    Pu-244 1.0 2.7 × 10−11 1.0 × 104 2.7 × 10−7
    Ra-223 (b) Radium (88) 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Ra-224 (b) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Ra-225 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Ra-226 (b) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Ra-228 (b) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Rb-81 Rubidium (37) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Rb-83 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Rb-84 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Rb-86 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Rb-87 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    Rb(nat) 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    Re-184 Rhenium (75) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Re-184m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Re-186 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Re-187 1.0 × 106 2.7 × 10−5 1.0 × 109 2.7 × 10−2
    Re-188 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Re-189 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Re(nat) 1.0 × 106 2.7 × 10−5 1.0 × 109 2.7 × 10−2
    Rh-99 Rhodium (45) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Rh-101 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Rh-102 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Rh-102m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Rh-103m 1.0 × 104 2.7 × 10−7 1.0 × 108 2.7 × 10−3
    Rh-105 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Rn-222 (b) Radon (86) 1.0 × 101 2.7 × 10−10 1.0 × 108 2.7 × 10−3
    Ru-97 Ruthenium (44) 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Ru-103 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Ru-105 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Ru-106 (b) 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    S-35 Sulphur (16) 1.0 × 105 2.7 × 10−6 1.0 × 108 2.7 × 10−3
    Sb-122 Antimony (51) 1.0 × 102 2.7 × 10−9 1.0 × 104 2.7 × 10−7
    Sb-124 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Sb-125 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Sb-126 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Sc-44 Scandium (21) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Sc-46 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Sc-47 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Sc-48 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Se-75 Selenium (34) 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Se-79 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    Si-31 Silicon (14) 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Si-32 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Sm-145 Samarium (62) 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Sm-147 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Sm-151 1.0 × 104 2.7 × 10−7 1.0 × 108 2.7 × 10−3
    Sm-153 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Sn-113 Tin (50) 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Sn-117m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Sn-119m 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Sn-121m 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Sn-123 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Sn-125 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Sn-126 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Sr-82 Strontium (38) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Sr-85 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Sr-85m 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Sr-87m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Sr-89 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Sr-90 (b) 1.0 × 102 2.7 × 10−9 1.0 × 104 2.7 × 10−7
    Sr-91 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Sr-92 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    T(H-3) Tritium (1) 1.0 × 106 2.7 × 10−5 1.0 × 109 2.7 × 10−2
    Ta-178 (long-lived) Tantalum (73) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Ta-179 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Ta-182 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Tb-157 Terbium (65) 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    Tb-158 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Tb-160 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Tc-95m Technetium (43) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Tc-96 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Tc-96m 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Tc-97 1.0 × 103 2.7 × 10−8 1.0 × 108 2.7 × 10−3
    Tc-97m 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Tc-98 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Tc-99 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    Tc-99m 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Te-121 Tellurium (52) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Te-121m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Te-123m 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Te-125m 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Te-127 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Te-127m 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Te-129 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Te-129m 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Te-131m 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Te-132 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Th-227 Thorium (90) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Th-228 (b) 1.0 2.7 × 10−11 1.0 × 104 2.7 × 10−7
    Th-229 (b) 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    Th-230 1.0 2.7 × 10−11 1.0 × 104 2.7 × 10−7
    Th-231 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Th-232 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    Th-234 (b) 1.0 × 103 2.7 × 10−8 1.0 × 105 2.7 × 10−6
    Th (nat) (b) 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    Ti-44 Titanium (22) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    Tl-200 Thallium (81) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Tl-201 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Tl-202 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Tl-204 1.0 × 104 2.7 × 10−7 1.0 × 104 2.7 × 10−7
    Tm-167 Thulium (69) 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Tm-170 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Tm-171 1.0 × 104 2.7 × 10−7 1.0 × 108 2.7 × 10−3
    U-230 (fast lung absorption) (b),(d) Uranium (92) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    U-230 (medium lung absorption) (e) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    U-230 (slow lung absorption) (f) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    U-232 (fast lung absorption) (b),(d) 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    U-232 (medium lung absorption) (e) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    U-232 (slow lung absorption) (f) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    U-233 (fast lung absorption) (d) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    U-233 (medium lung absorption) (e) 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    U-233 (slow lung absorption) (f) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    U-234 (fast lung absorption) (d) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    U-234 (medium lung absorption) (e) 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    U-234 (slow lung absorption) (f) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    U-235 (all lung absorption types) (b),(d),(e),(f) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    U-236 (fast lung absorption) (d) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    U-236 (medium lung absorption) (e) 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    U-236 (slow lung absorption) (f) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    U-238 (all lung absorption types) (b),(d),(e),(f) 1.0 × 101 2.7 × 10−10 1.0 × 104 2.7 × 10−7
    U (nat) (b) 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    U (enriched to 20% or less)(g) 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    U (dep) 1.0 2.7 × 10−11 1.0 × 103 2.7 × 10−8
    V-48 Vanadium (23) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6
    V-49 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    W-178 Tungsten (74) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    W-181 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    W-185 1.0 × 104 2.7 × 10−7 1.0 × 107 2.7 × 10−4
    W-187 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    W-188 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Xe-122 Xenon (54) 1.0 × 102 2.7 × 10−9 1.0 × 109 2.7 × 10−2
    Xe-123 1.0 × 102 2.7 × 10−9 1.0 × 109 2.7 × 10−2
    Xe-127 1.0 × 103 2.7 × 10−8 1.0 × 105 2.7 × 10−6
    Xe-131m 1.0 × 104 2.7 × 10−7 1.0 × 104 2.7 × 10−7
    Xe-133 1.0 × 103 2.7 × 10−8 1.0 × 104 2.7 × 10−7
    Xe-135 1.0 × 103 2.7 × 10−8 1.0 × 1010 2.7 × 10−1
    Y-87 Yttrium (39) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Y-88 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Y-90 1.0 × 103 2.7 × 10−8 1.0 × 105 2.7 × 10−6
    Y-91 1.0 × 103 2.7 × 10−8 1.0 × 106 2.7 × 10−5
    Y-91m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Y-92 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Y-93 1.0 × 102 2.7 × 10−9 1.0 × 105 2.7 × 10−6
    Yb-169 Ytterbium (70) 1.0 × 102 2.7 × 10−9 1.0 × 107 2.7 × 10−4
    Yb-175 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Zn-65 Zinc (30) 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Zn-69 1.0 × 104 2.7 × 10−7 1.0 × 106 2.7 × 10−5
    Zn-69m 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Zr-88 Zirconium (40) 1.0 × 102 2.7 × 10−9 1.0 × 106 2.7 × 10−5
    Zr-93 (b) 1.0 × 103 2.7 × 10−8 1.0 × 107 2.7 × 10−4
    Zr-95 1.0 × 101 2.7 × 10−10 1.0 × 106 2.7 × 10−5
    Zr-97 (b) 1.0 × 101 2.7 × 10−10 1.0 × 105 2.7 × 10−6

    a [Reserved]

    b Parent nuclides and their progeny included in secular equilibrium are listed as follows:

    Sr-90 Y-90

    Zr-93 Nb-93m

    Zr-97 Nb-97

    Ru-106 Rh-106

    Ag-108m Ag-108

    Cs-137 Ba-137m

    Ce-144 Pr-144

    Ba-140 La-140

    Bi-212 Tl-208 (0.36), Po-212 (0.64)

    Pb-210 Bi-210, Po-210

    Pb-212 Bi-212, Tl-208 (0.36), Po-212 (0.64)

    Rn-222 Po-218, Pb-214, Bi-214, Po-214

    Ra-223 Rn-219, Po-215, Pb-211, Bi-211, Tl-207

    Ra-224 Rn-220, Po-216, Pb-212, Bi-212, Tl-208 (0.36), Po-212 (0.64),

    Ra-226 Rn-222, Po-218, Pb-214, Bi-214, Po-214, Pb-210, Bi-210, Po-210

    Ra-228 Ac-228

    Th-228 Ra-224, Rn-220, Po-216, Pb-212, Bi-212, Tl-208 (0.36), Po-212 (0.64)

    Th-229 Ra-225, Ac-225, Fr-221, At-217, Bi-213, Po-213, Pb-209

    Th-nat Ra-228, Ac-228, Th-228, Ra-224, Rn-220, Po-216, Pb-212, Bi-212, Tl-208 (0.36), Po-212 (0.64)

    Th-234 Pa-234m

    U-230 Th-226, Ra-222, Rn-218, Po-214

    U-232 Th-228, Ra-224, Rn-220, Po-216, Pb-212, Bi-212, Tl-208 (0.36), Po-212 (0.64)

    U-235 Th-231

    U-238 Th-234, Pa-234m

    U-nat Th-234, Pa-234m, U-234, Th-230, Ra-226, Rn-222, Po-218, Pb-214, Bi-214, Po-214, Pb-210, Bi-210, Po-210

    Np-237 Pa-233

    Am-242m Am-242

    Am-243 Np-239

    c [Reserved]

    d These values apply only to compounds of uranium that take the chemical form of UF6, UO2F2 and UO2(NO3)2 in both normal and accident conditions of transport.

    e These values apply only to compounds of uranium that take the chemical form of UO3, UF4, UCl4 and hexavalent compounds in both normal and accident conditions of transport.

    f These values apply to all compounds of uranium other than those specified in notes (d) and (e) of this table.

    g These values apply to unirradiated uranium only.

    [69 FR 3685, Jan. 26, 2004, as amended at 79 FR 40615, July 11, 2014; 80 FR 72928, Nov. 23, 2015]