10 C.F.R. Appendix C to Part 20—Quantities1 of Licensed Material Requiring Labeling
Title 10 - Energy
[56 FR 23465, May 21, 1991; 56 FR 61352, Dec. 3, 1991. Redesignated and amended at 58 FR 67659, Dec. 22, 1993; 60 FR 20186, Apr. 25, 1995]
Title 10: Energy
PART 20—STANDARDS FOR PROTECTION AGAINST RADIATION
Subpart O—Enforcement
Appendix C to Part 20—Quantities1 of Licensed Material Requiring Labeling
------------------------------------------------------------------------ Quantity Radionuclide (µCi)------------------------------------------------------------------------Hydrogen-3................................................. 1,000Beryllium-7................................................ 1,000Beryllium-10............................................... 1Carbon-11.................................................. 1,000Carbon-14.................................................. 100Fluorine-18................................................ 1,000Sodium-22.................................................. 10Sodium-24.................................................. 100Magnesium-28............................................... 100Aluminum-26................................................ 10Silicon-31................................................. 1,000Silicon-32................................................. 1Phosphorus-32.............................................. 10Phosphorus-33.............................................. 100Sulfur-35.................................................. 100Chlorine-36................................................ 10Chlorine-38................................................ 1,000Chlorine-39................................................ 1,000Argon-39................................................... 1,000Argon-41................................................... 1,000Potassium-40............................................... 100Potassium-42............................................... 1,000Potassium-43............................................... 1,000Potassium-44............................................... 1,000Potassium-45............................................... 1,000Calcium-41................................................. 100Calcium-45................................................. 100Calcium-47................................................. 100Scandium-43................................................ 1,000Scandium-44m............................................... 100Scandium-44................................................ 100Scandium-46................................................ 10Scandium-47................................................ 100Scandium-48................................................ 100Scandium-49................................................ 1,000Titanium-44................................................ 1Titanium-45................................................ 1,000Vanadium-47................................................ 1,000Vanadium-48................................................ 100Vanadium-49................................................ 1,000Chromium-48................................................ 1,000Chromium-49................................................ 1,000Chromium-51................................................ 1,000Manganese-51............................................... 1,000Manganese-52m.............................................. 1,000Manganese-52............................................... 100Manganese-53............................................... 1,000Manganese-54............................................... 100Manganese-56............................................... 1,000Iron-52.................................................... 100Iron-55.................................................... 100Iron-59.................................................... 10Iron-60.................................................... 1Cobalt-55.................................................. 100Cobalt-56.................................................. 10Cobalt-57.................................................. 100Cobalt-58m................................................. 1,000Cobalt-58.................................................. 100Cobalt-60m................................................. 1,000Cobalt-60.................................................. 1Cobalt-61.................................................. 1,000Cobalt-62m................................................. 1,000Nickel-56.................................................. 100Nickel-57.................................................. 100Nickel-59.................................................. 100Nickel-63.................................................. 100Nickel-65.................................................. 1,000Nickel-66.................................................. 10Copper-60.................................................. 1,000Copper-61.................................................. 1,000Copper-64.................................................. 1,000Copper-67.................................................. 1,000Zinc-62.................................................... 100Zinc-63.................................................... 1,000Zinc-65.................................................... 10Zinc-69m................................................... 100Zinc-69.................................................... 1,000Zinc-71m................................................... 1,000Zinc-72.................................................... 100Gallium-65................................................. 1,000Gallium-66................................................. 100Gallium-67................................................. 1,000Gallium-68................................................. 1,000Gallium-70................................................. 1,000Gallium-72................................................. 100Gallium-73................................................. 1,000Germanium-66............................................... 1,000Germanium-67............................................... 1,000Germanium-68............................................... 10Germanium-69............................................... 1,000Germanium-71............................................... 1,000Germanium-75............................................... 1,000Germanium-77............................................... 1,000Germanium-78............................................... 1,000Arsenic-69................................................. 1,000Arsenic-70................................................. 1,000Arsenic-71................................................. 100Arsenic-72................................................. 100Arsenic-73................................................. 100Arsenic-74................................................. 100Arsenic-76................................................. 100Arsenic-77................................................. 100Arsenic-78................................................. 1,000Selenium-70................................................ 1,000Selenium-73m............................................... 1,000Selenium-73................................................ 100Selenium-75................................................ 100Selenium-79................................................ 100Selenium-81m............................................... 1,000Selenium-81................................................ 1,000Selenium-83................................................ 1,000Bromine-74m................................................ 1,000Bromine-74................................................. 1,000Bromine-75................................................. 1,000Bromine-76................................................. 100Bromine-77................................................. 1,000Bromine-80m................................................ 1,000Bromine-80................................................. 1,000Bromine-82................................................. 100Bromine-83................................................. 1,000Bromine-84................................................. 1,000Krypton-74................................................. 1,000Krypton-76................................................. 1,000Krypton-77................................................. 1,000Krypton-79................................................. 1,000Krypton-81................................................. 1,000Krypton-83m................................................ 1,000Krypton-85m................................................ 1,000Krypton-85................................................. 1,000Krypton-87................................................. 1,000Krypton-88................................................. 1,000Rubidium-79................................................ 1,000Rubidium-81m............................................... 1,000Rubidium-81................................................ 1,000Rubidium-82m............................................... 1,000Rubidium-83................................................ 100Rubidium-84................................................ 100Rubidium-86................................................ 100Rubidium-87................................................ 100Rubidium-88................................................ 1,000Rubidium-89................................................ 1,000Strontium-80............................................... 100Strontium-81............................................... 1,000Strontium-83............................................... 100Strontium-85m.............................................. 1,000Strontium-85............................................... 100Strontium-87m.............................................. 1,000Strontium-89............................................... 10Strontium-90............................................... 0.1Strontium-91............................................... 100Strontium-92............................................... 100Yttrium-86m................................................ 1,000Yttrium-86................................................. 100Yttrium-87................................................. 100Yttrium-88................................................. 10Yttrium-90m................................................ 1,000Yttrium-90................................................. 10Yttrium-91m................................................ 1,000Yttrium-91................................................. 10Yttrium-92................................................. 100Yttrium-93................................................. 100Yttrium-94................................................. 1,000Yttrium-95................................................. 1,000Zirconium-86............................................... 100Zirconium-88............................................... 10Zirconium-89............................................... 100Zirconium-93............................................... 1Zirconium-95............................................... 10Zirconium-97............................................... 100Niobium-88................................................. 1,000Niobium-89m (66 min)....................................... 1,000Niobium-89 (122 min)....................................... 1,000Niobium-90................................................. 100Niobium-93m................................................ 10Niobium-94................................................. 1Niobium-95m................................................ 100Niobium-95................................................. 100Niobium-96................................................. 100Niobium-97................................................. 1,000Niobium-98................................................. 1,000Molybdenum-90.............................................. 100Molybdenum-93m............................................. 100Molybdenum-93.............................................. 10Molybdenum-99.............................................. 100Molybdenum-101............................................. 1,000Technetium-93m............................................. 1,000Technetium-93.............................................. 1,000Technetium-94m............................................. 1,000Technetium-94.............................................. 1,000Technetium-96m............................................. 1,000Technetium-96.............................................. 100Technetium-97m............................................. 100Technetium-97.............................................. 1,000Technetium-98.............................................. 10Technetium-99m............................................. 1,000Technetium-99.............................................. 100Technetium-101............................................. 1,000Technetium-104............................................. 1,000Ruthenium-94............................................... 1,000Ruthenium-97............................................... 1,000Ruthenium-103.............................................. 100Ruthenium-105.............................................. 1,000Ruthenium-106.............................................. 1Rhodium-99m................................................ 1,000Rhodium-99................................................. 100Rhodium-100................................................ 100Rhodium-101m............................................... 1,000Rhodium-101................................................ 10Rhodium-102m............................................... 10Rhodium-102................................................ 10Rhodium-103m............................................... 1,000Rhodium-105................................................ 100Rhodium-106m............................................... 1,000Rhodium-107................................................ 1,000Palladium-100.............................................. 100Palladium-101.............................................. 1,000Palladium-103.............................................. 100Palladium-107.............................................. 10Palladium-109.............................................. 100Silver-102................................................. 1,000Silver-103................................................. 1,000Silver-104m................................................ 1,000Silver-104................................................. 1,000Silver-105................................................. 100Silver-106m................................................ 100Silver-106................................................. 1,000Silver-108m................................................ 1Silver-110m................................................ 10Silver-111................................................. 100Silver-112................................................. 100Silver-115................................................. 1,000Cadmium-104................................................ 1,000Cadmium-107................................................ 1,000Cadmium-109................................................ 1Cadmium-113m............................................... 0.1Cadmium-113................................................ 100Cadmium-115m............................................... 10Cadmium-115................................................ 100Cadmium-117m............................................... 1,000Cadmium-117................................................ 1,000Indium-109................................................. 1,000Indium-110 (69.1min.)...................................... 1,000Indium-110................................................. ........... (4.9h)................................................... 1,000Indium-111................................................. 100Indium-112................................................. 1,000Indium-113m................................................ 1,000Indium-114m................................................ 10Indium-115m................................................ 1,000Indium-115................................................. 100Indium-116m................................................ 1,000Indium-117m................................................ 1,000Indium-117................................................. 1,000Indium-119m................................................ 1,000Tin-110.................................................... 100Tin-111.................................................... 1,000Tin-113.................................................... 100Tin-117m................................................... 100Tin-119m................................................... 100Tin-121m................................................... 100Tin-121.................................................... 1,000Tin-123m................................................... 1,000Tin-123.................................................... 10Tin-125.................................................... 10Tin-126.................................................... 10Tin-127.................................................... 1,000Tin-128.................................................... 1,000Antimony-115............................................... 1,000Antimony-116m.............................................. 1,000Antimony-116............................................... 1,000Antimony-117............................................... 1,000Antimony-118m.............................................. 1,000Antimony-119............................................... 1,000Antimony-120 (16min.)...................................... 1,000Antimony-120 (5.76d)....................................... 100Antimony-122............................................... 100Antimony-124m.............................................. 1,000Antimony-124............................................... 10Antimony-125............................................... 100Antimony-126m.............................................. 1,000Antimony-126............................................... 100Antimony-127............................................... 100Antimony-128 (10.4min.).................................... 1,000Antimony-128 (9.01h)....................................... 100Antimony-129............................................... 100Antimony-130............................................... 1,000Antimony-131............................................... 1,000Tellurium-116.............................................. 1,000Tellurium-121m............................................. 10Tellurium-121.............................................. 100Tellurium-123m............................................. 10Tellurium-123.............................................. 100Tellurium-125m............................................. 10Tellurium-127m............................................. 10Tellurium-127.............................................. 1,000Tellurium-129m............................................. 10Tellurium-129.............................................. 1,000Tellurium-131m............................................. 10Tellurium-131.............................................. 100Tellurium-132.............................................. 10Tellurium-133m............................................. 100Tellurium-133.............................................. 1,000Tellurium-134.............................................. 1,000Iodine-120m................................................ 1,000Iodine-120................................................. 100Iodine-121................................................. 1,000Iodine-123................................................. 100Iodine-124................................................. 10Iodine-125................................................. 1Iodine-126................................................. 1Iodine-128................................................. 1,000Iodine-129................................................. 1Iodine-130................................................. 10Iodine-131................................................. 1Iodine-132m................................................ 100Iodine-132................................................. 100Iodine-133................................................. 10Iodine-134................................................. 1,000Iodine-135................................................. 100Xenon-120.................................................. 1,000Xenon-121.................................................. 1,000Xenon-122.................................................. 1,000Xenon-123.................................................. 1,000Xenon-125.................................................. 1,000Xenon-127.................................................. 1,000Xenon-129m................................................. 1,000Xenon-131m................................................. 1,000Xenon-133m................................................. 1,000Xenon-133.................................................. 1,000Xenon-135m................................................. 1,000Xenon-135.................................................. 1,000Xenon-138.................................................. 1,000Cesium-125................................................. 1,000Cesium-127................................................. 1,000Cesium-129................................................. 1,000Cesium-130................................................. 1,000Cesium-131................................................. 1,000Cesium-132................................................. 100Cesium-134m................................................ 1,000Cesium-134................................................. 10Cesium-135m................................................ 1,000Cesium-135................................................. 100Cesium-136................................................. 10Cesium-137................................................. 10Cesium-138................................................. 1,000Barium-126................................................. 1,000Barium-128................................................. 100Barium-131m................................................ 1,000Barium-131................................................. 100Barium-133m................................................ 100Barium-133................................................. 100Barium-135m................................................ 100Barium-139................................................. 1,000Barium-140................................................. 100Barium-141................................................. 1,000Barium-142................................................. 1,000Lanthanum-131.............................................. 1,000Lanthanum-132.............................................. 100Lanthanum-135.............................................. 1,000Lanthanum-137.............................................. 10Lanthanum-138.............................................. 100Lanthanum-140.............................................. 100Lanthanum-141.............................................. 100Lanthanum-142.............................................. 1,000Lanthanum-143.............................................. 1,000Cerium-134................................................. 100Cerium-135................................................. 100Cerium-137m................................................ 100Cerium-137................................................. 1,000Cerium-139................................................. 100Cerium-141................................................. 100Cerium-143................................................. 100Cerium-144................................................. 1Praseodymium-136........................................... 1,000Praseodymium-137........................................... 1,000Praseodymium-138m.......................................... 1,000Praseodymium-139........................................... 1,000Praseodymium-142m.......................................... 1,000Praseodymium-142........................................... 100Praseodymium-143........................................... 100Praseodymium-144........................................... 1,000Praseodymium-145........................................... 100Praseodymium-147........................................... 1,000Neodymium-136.............................................. 1,000Neodymium-138.............................................. 100Neodymium-139m............................................. 1,000Neodymium-139.............................................. 1,000Neodymium-141.............................................. 1,000Neodymium-147.............................................. 100Neodymium-149.............................................. 1,000Neodymium-151.............................................. 1,000Promethium-141............................................. 1,000Promethium-143............................................. 100Promethium-144............................................. 10Promethium-145............................................. 10Promethium-146............................................. 1Promethium-147............................................. 10Promethium-148m............................................ 10Promethium-148............................................. 10Promethium-149............................................. 100Promethium-150............................................. 1,000Promethium-151............................................. 100Samarium-141m.............................................. 1,000Samarium-141............................................... 1,000Samarium-142............................................... 1,000Samarium-145............................................... 100Samarium-146............................................... 1Samarium-147............................................... 100Samarium-151............................................... 10Samarium-153............................................... 100Samarium-155............................................... 1,000Samarium-156............................................... 1,000Europium-145............................................... 100Europium-146............................................... 100Europium-147............................................... 100Europium-148............................................... 10Europium-149............................................... 100Europium-150 (12.62h)...................................... 100Europium-150 (34.2y)....................................... 1Europium-152m.............................................. 100Europium-152............................................... 1Europium-154............................................... 1Europium-155............................................... 10Europium-156............................................... 100Europium-157............................................... 100Europium-158............................................... 1,000Gadolinium-145............................................. 1,000Gadolinium-146............................................. 10Gadolinium-147............................................. 100Gadolinium-148............................................. 0.001Gadolinium-149............................................. 100Gadolinium-151............................................. 10Gadolinium-152............................................. 100Gadolinium-153............................................. 10Gadolinium-159............................................. 100Terbium-147................................................ 1,000Terbium-149................................................ 100Terbium-150................................................ 1,000Terbium-151................................................ 100Terbium-153................................................ 1,000Terbium-154................................................ 100Terbium-155................................................ 1,000Terbium-156m (5.0h)........................................ 1,000Terbium-156m (24.4h)....................................... 1,000Terbium-156................................................ 100Terbium-157................................................ 10Terbium-158................................................ 1Terbium-160................................................ 10Terbium-161................................................ 100Dysprosium-155............................................. 1,000Dysprosium-157............................................. 1,000Dysprosium-159............................................. 100Dysprosium-165............................................. 1,000Dysprosium-166............................................. 100Holmium-155................................................ 1,000Holmium-157................................................ 1,000Holmium-159................................................ 1,000Holmium-161................................................ 1,000Holmium-162m............................................... 1,000Holmium-162................................................ 1,000Holmium-164m............................................... 1,000Holmium-164................................................ 1,000Holmium-166m............................................... 1Holmium-166................................................ 100Holmium-167................................................ 1,000Erbium-161................................................. 1,000Erbium-165................................................. 1,000Erbium-169................................................. 100Erbium-171................................................. 100Erbium-172................................................. 100Thulium-162................................................ 1,000Thulium-166................................................ 100Thulium-167................................................ 100Thulium-170................................................ 10Thulium-171................................................ 10Thulium-172................................................ 100Thulium-173................................................ 100Thulium-175................................................ 1,000Ytterbium-162.............................................. 1,000Ytterbium-166.............................................. 100Ytterbium-167.............................................. 1,000Ytterbium-169.............................................. 100Ytterbium-175.............................................. 100Ytterbium-177.............................................. 1,000Ytterbium-178.............................................. 1,000Lutetium-169............................................... 100Lutetium-170............................................... 100Lutetium-171............................................... 100Lutetium-172............................................... 100Lutetium-173............................................... 10Lutetium-174m.............................................. 10Lutetium-174............................................... 10Lutetium-176m.............................................. 1,000Lutetium-176............................................... 100Lutetium-177m.............................................. 10Lutetium-177............................................... 100Lutetium-178m.............................................. 1,000Lutetium-178............................................... 1,000Lutetium-179............................................... 1,000Hafnium-170................................................ 100Hafnium-172................................................ 1Hafnium-173................................................ 1,000Hafnium-175................................................ 100Hafnium-177m............................................... 1,000Hafnium-178m............................................... 0.1Hafnium-179m............................................... 10Hafnium-180m............................................... 1,000Hafnium-181................................................ 10Hafnium-182m............................................... 1,000Hafnium-182................................................ 0.1Hafnium-183................................................ 1,000Hafnium-184................................................ 100Tantalum-172............................................... 1,000Tantalum-173............................................... 1,000Tantalum-174............................................... 1,000Tantalum-175............................................... 1,000Tantalum-176............................................... 100Tantalum-177............................................... 1,000Tantalum-178............................................... 1,000Tantalum-179............................................... 100Tantalum-180m.............................................. 1,000Tantalum-180............................................... 100Tantalum-182m.............................................. 1,000Tantalum-182............................................... 10Tantalum-183............................................... 100Tantalum-184............................................... 100Tantalum-185............................................... 1,000Tantalum-186............................................... 1,000Tungsten-176............................................... 1,000Tungsten-177............................................... 1,000Tungsten-178............................................... 1,000Tungsten-179............................................... 1,000Tungsten-181............................................... 1,000Tungsten-185............................................... 100Tungsten-187............................................... 100Tungsten-188............................................... 10Rhenium-177................................................ 1,000Rhenium-178................................................ 1,000Rhenium-181................................................ 1,000Rhenium-182 (12.7h)........................................ 1,000Rhenium-182 (64.0h)........................................ 100Rhenium-184m............................................... 10Rhenium-184................................................ 100Rhenium-186m............................................... 10Rhenium-186................................................ 100Rhenium-187................................................ 1,000Rhenium-188m............................................... 1,000Rhenium-188................................................ 100Rhenium-189................................................ 100Osmium-180................................................. 1,000Osmium-181................................................. 1,000Osmium-182................................................. 100Osmium-185................................................. 100Osmium-189m................................................ 1,000Osmium-191m................................................ 1,000Osmium-191................................................. 100Osmium-193................................................. 100Osmium-194................................................. 1Iridium-182................................................ 1,000Iridium-184................................................ 1,000Iridium-185................................................ 1,000Iridium-186................................................ 100Iridium-187................................................ 1,000Iridium-188................................................ 100Iridium-189................................................ 100Iridium-190m............................................... 1,000Iridium-190................................................ 100Iridium-192 (73.8d)........................................ 1Iridium-192m (1.4min.)..................................... 10Iridium-194m............................................... 10Iridium-194................................................ 100Iridium-195m............................................... 1,000Iridium-195................................................ 1,000Platinum-186............................................... 1,000Platinum-188............................................... 100Platinum-189............................................... 1,000Platinum-191............................................... 100Platinum-193m.............................................. 100Platinum-193............................................... 1,000Platinum-195m.............................................. 100Platinum-197m.............................................. 1,000Platinum-197............................................... 100Platinum-199............................................... 1,000Platinum-200............................................... 100Gold-193................................................... 1,000Gold-194................................................... 100Gold-195................................................... 10Gold-198m.................................................. 100Gold-198................................................... 100Gold-199................................................... 100Gold-200m.................................................. 100Gold-200................................................... 1,000Gold-201................................................... 1,000Mercury-193m............................................... 100Mercury-193................................................ 1,000Mercury-194................................................ 1Mercury-195m............................................... 100Mercury-195................................................ 1,000Mercury-197m............................................... 100Mercury-197................................................ 1,000Mercury-199m............................................... 1,000Mercury-203................................................ 100Thallium-194m.............................................. 1,000Thallium-194............................................... 1,000Thallium-195............................................... 1,000Thallium-197............................................... 1,000Thallium-198m.............................................. 1,000Thallium-198............................................... 1,000Thallium-199............................................... 1,000Thallium-200............................................... 1,000Thallium-201............................................... 1,000Thallium-202............................................... 100Thallium-204............................................... 100Lead-195m.................................................. 1,000Lead-198................................................... 1,000Lead-199................................................... 1,000Lead-200................................................... 100Lead-201................................................... 1,000Lead-202m.................................................. 1,000Lead-202................................................... 10Lead-203................................................... 1,000Lead-205................................................... 100Lead-209................................................... 1,000Lead-210................................................... 0.01Lead-211................................................... 100Lead-212................................................... 1Lead-214................................................... 100Bismuth-200................................................ 1,000Bismuth-201................................................ 1,000Bismuth-202................................................ 1,000Bismuth-203................................................ 100Bismuth-205................................................ 100Bismuth-206................................................ 100Bismuth-207................................................ 10Bismuth-210m............................................... 0.1Bismuth-210................................................ 1Bismuth-212................................................ 10Bismuth-213................................................ 10Bismuth-214................................................ 100Polonium-203............................................... 1,000Polonium-205............................................... 1,000Polonium-207............................................... 1,000Polonium-210............................................... 0.1Astatine-207............................................... 100Astatine-211............................................... 10Radon-220.................................................. 1Radon-222.................................................. 1Francium-222............................................... 100Francium-223............................................... 100Radium-223................................................. 0.1Radium-224................................................. 0.1Radium-225................................................. 0.1Radium-226................................................. 0.1Radium-227................................................. 1,000Radium-228................................................. 0.1Actinium-224............................................... 1Actinium-225............................................... 0.01Actinium-226............................................... 0.1Actinium-227............................................... 0.001Actinium-228............................................... 1Thorium-226................................................ 10Thorium-227................................................ 0.01Thorium-228................................................ 0.001Thorium-229................................................ 0.001Thorium-230................................................ 0.001Thorium-231................................................ 100Thorium-232................................................ 100Thorium-234................................................ 10Thorium-natural............................................ 100Protactinium-227........................................... 10Protactinium-228........................................... 1Protactinium-230........................................... 0.1Protactinium-231........................................... 0.001Protactinium-232........................................... 1Protactinium-233........................................... 100Protactinium-234........................................... 100Uranium-230................................................ 0.01Uranium-231................................................ 100Uranium-232................................................ 0.001Uranium-233................................................ 0.001Uranium-234................................................ 0.001Uranium-235................................................ 0.001Uranium-236................................................ 0.001Uranium-237................................................ 100Uranium-238................................................ 100Uranium-239................................................ 1,000Uranium-240................................................ 100Uranium-natural............................................ 100Neptunium-232.............................................. 100Neptunium-233.............................................. 1,000Neptunium-234.............................................. 100Neptunium-235.............................................. 100Neptunium-236 (1.15x10\5\ y)............................... 0.001Neptunium-236 (22.5h)...................................... 1Neptunium-237.............................................. 0.001Neptunium-238.............................................. 10Neptunium-239.............................................. 100Neptunium-240.............................................. 1,000Plutonium-234.............................................. 10Plutonium-235.............................................. 1,000Plutonium-236.............................................. 0.001Plutonium-237.............................................. 100Plutonium-238.............................................. 0.001Plutonium-239.............................................. 0.001Plutonium-240.............................................. 0.001Plutonium-241.............................................. 0.01Plutonium-242.............................................. 0.001Plutonium-243.............................................. 1,000Plutonium-244.............................................. 0.001Plutonium-245.............................................. 100Americium-237.............................................. 1,000Americium-238.............................................. 100Americium-239.............................................. 1,000Americium-240.............................................. 100Americium-241.............................................. 0.001Americium-242m............................................. 0.001Americium-242.............................................. 10Americium-243.............................................. 0.001Americium-244m............................................. 100Americium-244.............................................. 10Americium-245.............................................. 1,000Americium-246m............................................. 1,000Americium-246.............................................. 1,000Curium-238................................................. 100Curium-240................................................. 0.1Curium-241................................................. 1Curium-242................................................. 0.01Curium-243................................................. 0.001Curium-244................................................. 0.001Curium-245................................................. 0.001Curium-246................................................. 0.001Curium-247................................................. 0.001Curium-248................................................. 0.001Curium-249................................................. 1,000Berkelium-245.............................................. 100Berkelium-246.............................................. 100Berkelium-247.............................................. 0.001Berkelium-249.............................................. 0.1Berkelium-250.............................................. 10Californium-244............................................ 100Californium-246............................................ 1Californium-248............................................ 0.01Californium-249............................................ 0.001Californium-250............................................ 0.001Californium-251............................................ 0.001Californium-252............................................ 0.001Californium-253............................................ 0.1Californium-254............................................ 0.001Any alpha emitting radionuclide not listed above or 0.001 mixtures of alpha emitters of unknown composition.........Einsteinium-250............................................ 100Einsteinium-251............................................ 100Einsteinium-253............................................ 0.1Einsteinium-254m........................................... 1Einsteinium-254............................................ 0.01Fermium-252................................................ 1Fermium-253................................................ 1Fermium-254................................................ 10Fermium-255................................................ 1Fermium-257................................................ 0.01Mendelevium-257............................................ 10Mendelevium-258............................................ 0.01Any radionuclide other than alpha emitting radionuclides 0.01 not listed above, or mixtures of beta emitters of unknown composition...............................................------------------------------------------------------------------------\1\ The quantities listed above were derived by taking \1/10\th of the most restrictive ALI listed in table 1, columns 1 and 2, of appendix B to §§ 20.1001-20.2401 of this part, rounding to the nearest factor of 10, and arbitrarily constraining the values listed between 0.001 and 1,000 µCi. Values of 100 µCi have been assigned for radionuclides having a radioactive half-life in excess of 10\9\ years (except rhenium, 1000 µCi) to take into account their low specific activity.Note: For purposes of §§ 20.1902(e), 20.1905(a), and 20.2201(a) where there is involved a combination of radionuclides in known amounts, the limit for the combination should be derived as follows: determine, for each radionuclide in the combination, the ratio between the quantity present in the combination and the limit otherwise established for the specific radionuclide when not in combination. The sum of such ratios for all radionuclides in the combination may not exceed ``1'' (i.e., ``unity'').
