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 Code of Federal Regulations (Last Updated: November 8, 2024)
 Title 10 - Energy
 Chapter I - Nuclear Regulatory Commission
 Part 30 - Rules of General Applicability to Domestic Licensing of Byproduct Material

  Appendix B to Part 30 - Quantities 1 of Licensed Material Requiring Labeling  

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  • Appendix B to Part 30 - Quantities1 of Licensed Material Requiring Labeling

    Material Microcuries
    Americium-241 .01
    Antimony-122 100
    Antimony-124 10
    Antimony-125 10
    Arsenic-73 100
    Arsenic-74 10
    Arsenic-76 10
    Arsenic-77 100
    Barium-131 10
    Barium-133 10
    Barium-140 10
    Bismuth-210 1
    Bromine-82 10
    Cadmium-109 10
    Cadmium-115m 10
    Cadmium-115 100
    Calcium-45 10
    Calcium-47 10
    Carbon-14 100
    Cerium-141 100
    Cerium-143 100
    Cerium-144 1
    Cesium-131 1,000
    Cesium-134m 100
    Cesium-134 1
    Cesium-135 10
    Cesium-136 10
    Cesium-137 10
    Chlorine-36 10
    Chlorine-38 10
    Chromium-51 1,000
    Cobalt-58m 10
    Cobalt-58 10
    Cobalt-60 1
    Copper-64 100
    Dysprosium-165 10
    Dysprosium-166 100
    Erbium-169 100
    Erbium-171 100
    Europium-152 9.2 h 100
    Europium-152 13 yr 1
    Europium-154 1
    Europium-155 10
    Fluorine-18 1,000
    Gadolinium-153 10
    Gadolinium-159 100
    Gallium-72 10
    Germanium-71 100
    Gold-198 100
    Gold-199 100
    Hafnium-181 10
    Holmium-166 100
    Hydrogen-3 1,000
    Indium-113m 100
    Indium-114m 10
    Indium-115m 100
    Indium-115 10
    Iodine-125 1
    Iodine-126 1
    Iodine-129 0.1
    Iodine-131 1
    Iodine-132 10
    Iodine-133 1
    Iodine-134 10
    Iodine-135 10
    Iridium-192 10
    Iridium-194 100
    Iron-55 100
    Iron-59 10
    Krypton-85 100
    Krypton-87 10
    Lanthanum-140 10
    Lutetium-177 100
    Manganese-52 10
    Manganese-54 10
    Manganese-56 10
    Mercury-197m 100
    Mercury-197 100
    Mercury-203 10
    Molybdenum-99 100
    Neodymium-147 100
    Neodymium-149 100
    Nickel-59 100
    Nickel-63 10
    Nickel-65 100
    Niobium-93m 10
    Niobium-95 10
    Niobium-97 10
    Osmium-185 10
    Osmium-191m 100
    Osmium-191 100
    Osmium-193 100
    Palladium-103 100
    Palladium-109 100
    Phosphorus-32 10
    Platinum-191 100
    Platinum-193m 100
    Platinum-193 100
    Platinum-197m 100
    Platinum-197 100
    Plutonium-239 .01
    Polonium-210 0.1
    Potassium-42 10
    Praseodymium-142 100
    Praseodymium-143 100
    Promethium-147 10
    Promethium-149 10
    Radium-226 .01
    Rhenium-186 100
    Rhenium-188 100
    Rhodium-103m 100
    Rhodium-105 100
    Rubidium-86 10
    Rubidium-87 10
    Ruthenium-97 100
    Ruthenium-103 10
    Ruthenium-105 10
    Ruthenium-106 1
    Samarium-151 10
    Samarium-153 100
    Scandium-46 10
    Scandium-47 100
    Scandium-48 10
    Selenium-75 10
    Silicon-31 100
    Silver-105 10
    Silver-110m 1
    Silver-111 100
    Sodium-24 10
    Strontium-85 10
    Strontium-89 1
    Strontium-90 0.1
    Strontium-91 10
    Strontium-92 10
    Sulphur-35 100
    Tantalum-182 10
    Technetium-96 10
    Technetium-97m 100
    Technetium-97 100
    Technetium-99m 100
    Technetium-99 10
    Tellurium-125m 10
    Tellurium-127m 10
    Tellurium-127 100
    Tellurium-129m 10
    Tellurium-129 100
    Tellurium-131m 10
    Tellurium-132 10
    Terbium-160 10
    Thallium-200 100
    Thallium-201 100
    Thallium-202 100
    Thallium-204 10
    Thorium (natural)1 100
    Thulium-170 10
    Thulium-171 10
    Tin-113 10
    Tin-125 10
    Tungsten-181 10
    Tungsten-185 10
    Tungsten-187 100
    Uranium (natural)2 100
    Uranium-233 .01
    Uranium-234 - Uranium-235 .01
    Vanadium-48 10
    Xenon-131m 1,000
    Xenon-133 100
    Xenon-135 100
    Ytterbium-175 100
    Yttrium-90 10
    Yttrium-91 10
    Yttrium-92 100
    Yttrium-93 100
    Zinc-65 10
    Zinc-69m 100
    Zinc-69 1,000
    Zirconium-93 10
    Zirconium-95 10
    Zirconium-97 10
    Any alpha emitting radionuclide not listed above or mixtures of alpha emitters of unknown composition .01
    Any radionuclide other than alpha emitting radionuclides, not listed above or mixtures of beta emitters of unknown composition .1

    1 Based on alpha disintegration rate of Th-232, Th-230 and their daughter products.

    2 Based on alpha disintegration rate of U-238, U-234, and U-235.

    Note:

    For purposes of § 20.303, where there is involved a combination of isotopes in known amounts, the limit for the combination should be derived as follows: Determine, for each isotope in the combination, the ratio between the quantity present in the combination and the limit otherwise established for the specific isotope when not in combination. The sum of such ratios for all the isotopes in the combination may not exceed “1” (i.e., “unity”).

    [35 FR 6425, Apr. 22, 1970, as amended at 36 FR 16898, Aug. 26, 1971; 38 FR 29314, Oct. 24, 1973; 39 FR 23991, June 28, 1974; 45 FR 71763, Oct. 30, 1980. Redesignated at 56 FR 23391, May 21, 1991, and further redesignated at 58 FR 67659, Dec. 22, 1993]