6 Colo. Code Regs. § 1007-1-4F
QUANTITIES FOR USE WITH DECOMMISSIONING
Material | Microcurie* |
Americium-241 | 0.01 |
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-115 | 100 |
Cadmium-115m | 10 |
Calcium-45 | 10 |
Calcium-47 | 10 |
Carbon-14 | 100 |
Cerium-141 | 100 |
Cerium-143 | 100 |
Cerium-144 | 1 |
Cesium-131 | 1,000 |
Cesium-134 | 1 |
Cesium-134m | 100 |
Cesium-135 | 10 |
Cesium-136 | 10 |
Cesium-137 | 10 |
Chlorine-36 | 10 |
Chlorine-38 | 10 |
Chromium-51 | 1,000 |
Cobalt-58 | 10 |
Cobalt-58m | 10 |
Cobalt-60 | 1 |
Copper-64 | 100 |
Dysprosium-165 | 10 |
Dysprosium-166 | 100 |
Erbium-169 | 100 |
Erbium-171 | 100 |
Europium-152 (13 yr) | 1 |
Europium-152 (9.2 h) | 100 |
Europium-154 | 1 |
Europium-155 | 10 |
Florine-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-115 | 10 |
Indium-115m | 100 |
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-197 | 100 |
Mercury-197m | 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-191 | 100 |
Osmium-191m | 100 |
Osmium-193 | 100 |
Palladium-103 | 100 |
Palladium-109 | 100 |
Phosphorus-32 | 10 |
Platinum-191 | 100 |
Platinum-193 | 100 |
Platinum-193m | 100 |
Platinum-197 | 100 |
Platinum-197m | 100 |
Plutonium-239 | 0.01 |
Polonium-210 | 0.1 |
Potassium-42 | 10 |
Praseodymium-142 | 100 |
Praseodymium-143 | 100 |
Promethium-147 | 10 |
Promethium-149 | 10 |
Radium-226 | 0.01 |
Rhenium-186 | 100 |
Rhenium-188 | 100 |
Rhodium-103m | 100 |
Rhodium-105 | 100 |
Rubidium-86 | 10 |
Rubidium-87 | 10 |
Ruthenium-103 | 10 |
Ruthenium-105 | 10 |
Ruthenium-106 | 1 |
Ruthenium-97 | 100 |
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-111 | 100 |
Silver-110m | 1 |
Sodium-22 | 1 |
Sodium-24 | 10 |
Strontium-85 | 10 |
Strontium-89 | 1 |
Strontium-90 | 0.1 |
Strontium-91 | 10 |
Strontium-92 | 10 |
Sulfur -35 | 100 |
Tantalum-182 | 10 |
Technetium-96 | 10 |
Technetium-97 | 100 |
Technetium-97m | 100 |
Technetium-99 | 10 |
Technetium-99m | 100 |
Tellurium-125m | 10 |
Tellurium-127 | 100 |
Tellurium-127m | 10 |
Tellurium-129 | 100 |
Tellurium-129m | 10 |
Tellurium-131m | 10 |
Tellurium-132 | 10 |
Terbium-160 | 10 |
Thallium-200 | 100 |
Thallium-201 | 100 |
Thallium-202 | 100 |
Thallium-204 | 10 |
Thorium (natural)** | 100 |
Thulium-170 | 10 |
Thulium-171 | 10 |
Tin-113 | 10 |
Tin-125 | 10 |
Tungsten-181 | 10 |
Tungsten-185 | 10 |
Tungsten-187 | 100 |
Uranium (natural)*** | 100 |
Uranium-233 | 0.01 |
Uranium-234 | 0.01 |
Uranium-235 | 0.01 |
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-69 | 1,000 |
Zinc-69m | 100 |
Zirconium-93 | 10 |
Zirconium-95 | 10 |
Zirconium-97 | 10 |
Any alpha emitting radionuclide not listed above or mixtures of alpha emitters of unknown composition | 0.01 |
Any radionuclide other than alpha emitting radionuclides, not listed above or mixtures of beta emitters of unknown composition | 0.1 |
* To convert µCi to kBq, multiply the µCi value by 37. | . |
** Based on alpha disintegration rate of Th-232, Th-230 and their decay products. | . |
*** Based on alpha disintegration rate of U-238, U-234, and U-235. | . |
Note: 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" - that is, unity.
6 CCR 1007-1-4F