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Nuclear Substances and Radiation Devices Regulations (SOR/2000-207)

Regulations are current to 2024-10-14 and last amended on 2015-03-13. Previous Versions

SCHEDULE 2(Section 1)

Unconditional Clearance Levels

Column 1Column 2
Radioactive Nuclear SubstanceActivity Concentration

(Bq/g)

Actinium 2271 × 100
Americium 2411 × 10-1
Americium 2421 × 103
Americium 242mFootnote for Unconditional Clearance Levelsa1 × 10-1
Americium 243Footnote for Unconditional Clearance Levelsa1 × 10-1
Antimony 1221 × 101
Antimony 1241 × 100
Antimony 1251 × 10-1
Arsenic 731 × 103
Arsenic 741 × 101
Arsenic 761 × 101
Arsenic 771 × 103
Astatine 2111 × 103
Barium 1311 × 101
Barium 140Footnote for Unconditional Clearance Levelsa1 × 100
Berkelium 2491 × 102
Beryllium 71 × 101
Bismuth 2061 × 100
Bismuth 2071 × 10-1
Bromine 821 × 100
Cadmium 1091 × 100
Cadmium 1151 × 101
Cadmium 115m1 × 102
Calcium 451 × 102
Calcium 471 × 101
Californium 2461 × 103
Californium 2481 × 100
Californium 2491 × 10-1
Californium 2501 × 100
Californium 2511 × 10-1
Californium 2521 × 100
Californium 2531 × 102
Californium 2541 × 100
Carbon 141 × 100
Cerium 1391 × 100
Cerium 1411 × 102
Cerium 1431 × 101
Cerium 144Footnote for Unconditional Clearance Levelsa1 × 101
Cesium 1291 × 101
Cesium 1311 × 103
Cesium 1321 × 101
Cesium 1341 × 10-1
Cesium 134m1 × 103
Cesium 1351 × 102
Cesium 1361 × 100
Cesium 137Footnote for Unconditional Clearance Levelsa1 × 10-1
Cesium 1381 × 101
Chlorine 361 × 100
Chlorine 381 × 101
Chromium 511 × 102
Cobalt 551 × 101
Cobalt 561 × 10-1
Cobalt 571 × 100
Cobalt 581 × 100
Cobalt 58m1 × 104
Cobalt 601 × 10-1
Cobalt 60m1 × 103
Cobalt 611 × 102
Cobalt 62m1 × 101
Copper 641 × 102
Curium 2421 × 101
Curium 2431 × 100
Curium 2441 × 100
Curium 2451 × 10-1
Curium 2461 × 10-1
Curium 2471 × 10-1
Curium 2481 × 10-1
Dysprosium 1651 × 103
Dysprosium 1661 × 102
Einsteinium 2531 × 102
Einsteinium 2541 × 10-1
Einsteinium 254m1 × 101
Erbium 1691 × 103
Erbium 1711 × 102
Europium 1521 × 10-1
Europium 152m1 × 102
Europium 1541 × 10-1
Europium 1551 × 100
Fermium 2541 × 104
Fermium 2551 × 102
Fluorine 181 × 101
Gadolinium 1531 × 101
Gadolinium 1591 × 102
Gallium 721 × 101
Germanium 711 × 104
Gold 1981 × 101
Gold 1991 × 102
Hafnium 1811 × 100
Holmium 1661 × 102
Hydrogen 31 × 102
Indium 1111 × 101
Indium 113m1 × 102
Indium 114m1 × 101
Indium 115m1 × 102
Iodine 1231 × 102
Iodine 1251 × 102
Iodine 1261 × 101
Iodine 1291 × 10-2
Iodine 1301 × 101
Iodine 1311 × 101
Iodine 1321 × 101
Iodine 1331 × 101
Iodine 1341 × 101
Iodine 1351 × 101
Iridium 1901 × 100
Iridium 1921 × 100
Iridium 1941 × 102
Iron 521 × 101
Iron 551 × 103
Iron 591 × 100
Lanthanum 1401 × 100
Lead 2031 × 101
Lead 210Footnote for Unconditional Clearance Levelsa1 × 100
Lutetium 1771 × 102
Manganese 511 × 101
Manganese 521 × 100
Manganese 52m1 × 101
Manganese 531 × 102
Manganese 541 × 10-1
Manganese 561 × 101
Mercury 1971 × 102
Mercury 197m1 × 102
Mercury 2031 × 101
Molybdenum 901 × 101
Molybdenum 931 × 101
Molybdenum 991 × 101
Molybdenum 1011 × 101
Neodymium 1471 × 102
Neodymium 1491 × 102
Neptunium 237Footnote for Unconditional Clearance Levelsa1 × 100
Neptunium 2391 × 102
Neptunium 2401 × 101
Nickel 591 × 102
Nickel 631 × 102
Nickel 651 × 101
Niobium 93m1 × 101
Niobium 941 × 10-1
Niobium 951 × 100
Niobium 971 × 101
Niobium 981 × 101
Osmium 1851 × 100
Osmium 1911 × 102
Osmium 191m1 × 103
Osmium 1931 × 102
Palladium 1031 × 103
Palladium 1091 × 102
Phosphorous 321 × 103
Phosphorous 331 × 103
Platinum 1911 × 101
Platinum 193m1 × 103
Platinum 1971 × 103
Platinum 197m1 × 102
Plutonium 2341 × 102
Plutonium 2351 × 102
Plutonium 2361 × 100
Plutonium 2371 × 102
Plutonium 2381 × 10-1
Plutonium 2391 × 10-1
Plutonium 2401 × 10-1
Plutonium 2411 × 101
Plutonium 2421 × 10-1
Plutonium 2431 × 103
Plutonium 2441 × 10-1
Polonium 2031 × 101
Polonium 2051 × 101
Polonium 2071 × 101
Polonium 2101 × 100
Potassium 401 × 101
Potassium 421 × 102
Potassium 431 × 101
Praseodymium 1421 × 102
Praseodymium 1431 × 103
Promethium 1471 × 103
Promethium 1491 × 103
Protactinium 2301 × 101
Protactinium 2311 × 100
Protactinium 2331 × 101
Radium 223Footnote for Unconditional Clearance Levelsa1 × 100
Radium 224Footnote for Unconditional Clearance Levelsa1 × 100
Radium 2251 × 101
Radium 226Footnote for Unconditional Clearance Levelsa1 × 100
Radium 2271 × 102
Radium 228Footnote for Unconditional Clearance Levelsa1 × 100
Rhenium 1861 × 103
Rhenium 1881 × 102
Rhodium 103m1 × 104
Rhodium 1051 × 102
Rubidium 861 × 102
Ruthenium 971 × 101
Ruthenium 1031 × 100
Ruthenium 1051 × 101
Ruthenium 106Footnote for Unconditional Clearance Levelsa1 × 10-1
Samarium 1511 × 103
Samarium 1531 × 102
Scandium 461 × 10-1
Scandium 471 × 102
Scandium 481 × 100
Selenium 751 × 100
Silicon 311 × 103
Silver 1051 × 100
Silver 110m1 × 10-1
Silver 1111 × 102
Sodium 221 × 10-1
Sodium 241 × 100
Strontium 851 × 100
Strontium 85m1 × 102
Strontium 87m1 × 102
Strontium 891 × 103
Strontium 90Footnote for Unconditional Clearance Levelsa1 × 100
Strontium 911 × 101
Strontium 921 × 101
Sulphur 351 × 102
Tantalum 1821 × 10-1
Technetium 961 × 100
Technetium 96m1 × 103
Technetium 971 × 101
Technetium 97m1 × 102
Technetium 991 × 100
Technetium 99m1 × 102
Tellurium 123m1 × 100
Tellurium 125m1 × 103
Tellurium 1271 × 103
Tellurium 127m1 × 101
Tellurium 1291 × 102
Tellurium 129m1 × 101
Tellurium 1311 × 102
Tellurium 131m1 × 101
Tellurium 1321 × 100
Tellurium 1331 × 101
Tellurium 133m1 × 101
Tellurium 1341 × 101
Terbium 1601 × 100
Thallium 2001 × 101
Thallium 2011 × 102
Thallium 2021 × 101
Thallium 2041 × 100
Thorium 226Footnote for Unconditional Clearance Levelsa1 × 103
Thorium 2271 × 100
Thorium 228Footnote for Unconditional Clearance Levelsa1 × 100
Thorium 229Footnote for Unconditional Clearance Levelsa1 × 10-1
Thorium 2301 × 100
Thorium 2321 × 100
Thorium 234Footnote for Unconditional Clearance Levelsa1 × 100
Thorium naturalFootnote for Unconditional Clearance Levelsa1 × 100
Thulium 1701 × 102
Thulium 1711 × 103
Tin 1131 × 100
Tin 1251 × 101
Tungsten 1811 × 101
Tungsten 1851 × 103
Tungsten 1871 × 101
Uranium 230Footnote for Unconditional Clearance Levelsa1 × 101
Uranium 2311 × 102
Uranium 232Footnote for Unconditional Clearance Levelsa1 × 10-1
Uranium 2331 × 100
Uranium 2341 × 100
Uranium 235Footnote for Unconditional Clearance Levelsa1 × 100
Uranium 2361 × 101
Uranium 2371 × 102
Uranium 238Footnote for Unconditional Clearance Levelsa1 × 100
Uranium 2391 × 102
Uranium 240Footnote for Unconditional Clearance Levelsa1 × 102
Uranium naturalFootnote for Unconditional Clearance Levelsa1 × 100
Vanadium 481 × 100
Ytterbium 1751 × 102
Yttrium 901 × 103
Yttrium 911 × 102
Yttrium 91m1 × 102
Yttrium 921 × 102
Yttrium 931 × 102
Zinc 651 × 10-1
Zinc 691 × 103
Zinc 69m1 × 101
Zirconium 93Footnote for Unconditional Clearance Levelsa1 × 101
Zirconium 951 × 100
Zirconium 97Footnote for Unconditional Clearance Levelsa1 × 101

  • Return to footnote aParent nuclides and their progeny included in secular equilibrium are listed in the following:

    • Am-242m 
      Am-242
    • Am-243 
      Np-239
    • Ba-140 
      La-140
    • Ce-144 
      Pr-144
    • Cs-137 
      Ba-137m
    • Np-237 
      Pa-233
    • Pb-210 
      Bi-210
    • 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
    • Ru-106 
      Rh-106
    • Sr-90 
      Y-90
    • Th-226 
      Ra-222, Rn-218, Po-214
    • 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-234 
      Pa-234m
    • 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)
    • 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-240 
      Np-240m
    • 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
    • Zr-93 
      Nb-93m
    • Zr-97 
      Nb-97
  • SOR/2008-119, s. 38

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