1. (1) Transport group as used in this rule means any one of seven groups into which radionuclides in normal form are classified, according to their toxicity and their relative potential hazard in transport, in Table RHS 2–3.

   1. (a) Any radionuclide, not specifically listed in one of the groups in Table RHS 2–3 shall be assigned to one of the groups in accordance with Table RHS 2–2.

   2. (b) For mixtures of radionuclides the following shall apply:

      1. 1. If the identity and respective activity of each radionuclide are known, the permissible activity of each radionuclide shall be such that the sum, for all groups present, of the ratio between the total activity for each group to the permissible activity for each group will not be greater than unity.
      2. 2. If the groups of the radionuclides are known, but the activity in each group cannot be reasonably determined, the mixture shall be assigned to the most restrictive group present.
      3. 3. If the identity of all or some of the radionuclides cannot be reasonably determined, each of the unidentified radionuclides shall be considered as belonging to the most restrictive group that cannot be positively excluded.

      4. 4. Mixtures consisting of a single radioactive decay chain where the radionuclides are in the naturally occurring proportions shall be considered as consisting of a single radionuclide. The group and activity shall be that of the first member present in the chain, except that if a radionuclide “x” has a half–life longer than that of the first member and an activity greater than that of any other member, including the first, at any time during transportation, the group of the nuclide “x” and the activity of the mixture shall be the maximum activity of that nuclide “x” during transportation. TABLE RHS 2–1 TYPE X QUANTITIES Type X Transport Quantity Limit Group (in curies) I 0.001 II 0.050 III 3 IV 20 V 20 VI 1,000 VII 1,000 Special Form 20 TABLE RHS 2–2 Radioactive half–life 0 to 1,000 1,000 days to one over one Radionuclide days million years million years Atomic Group III Group II Group III Number 1–81 Atomic Number 82 and Group I Group I Group III Over TABLE RHS 2–3 TRANSPORT GROUPING OF RADIONUCLIDES Element * Radionuclide *** Group Actinium (89) Ac–227 I Ac–228 I Americium (95) Am–241 I Am–243 I Antimony (51) Sb–122 IV Sb–124 III Sb–125 III Argon (18) Ar–37 VI Ar–41 II Ar–41 (uncompressed) ** V Arsenic (33) As–73 IV As–74 IV As–76 IV As–77 IV Astatine (85) At–211 III Barium (56) Ba–131 IV Ba–133 II Ba–140 III Berkelium (97) Bk–249 I Beryllium (4) Be–7 IV Bismuth (83) Bi–206 IV Bi–207 III Bi–210 II Bi–212 III Bromine (35) Br –82 IV Cadmium (48) Cd–109 IV Cd–115 m III Cd–115 IV Calcium (20) Ca–45 IV Ca–47 IV Californium (98) Cf–249 I Cf–250 I Cf–252 I Carbon (6) C–14 IV Cerium (58) Ce–141 IV Ce–143 IV Ce–144 III * Atomic number shown in parentheses. *** Atomic weight shown after the radionuclide symbol. ** Uncompressed means at a pressure not exceeding one atmosphere. m Metastable State. Element * Radionuclide *** Group Cesium (55) Cs–131 IV Cs–134 m III Cs–134 III Cs–135 IV Cs–136 IV Cs–137 III Chlorine (17) Cl–36 III Cl–38 IV Chromium (24) Cr–51 IV Cobalt (27) Co–56 III Co–57 IV Co–58 m IV Co–58 IV Co–60 III Copper (29) Cu–64 IV Curium (96) Cm–242 I Cm–243 I Cm–244 I Cm–245 I Cm–246 I Dysprosium (66) Dy–154 III Dy–165 IV Dy–166 IV Erbium (68) Er–169 IV Er–171 IV Europium (63) Eu–130 III Eu–152m IV Eu–152 III Eu–154 II Eu–155 IV Fluorine (9) F–18 IV Gadolinium (64) Gd–153 IV Gd–159 IV Gallium (31) Ga–67 III Ga–72 IV Germanium (32) Ge–71 IV Gold (79) Au–193 III Au–194 III Au–195 III Au–196 IV Au–198 IV Au–199 IV Hafnium (72) Hf–181 IV Holmium (67) Ho–166 IV Hydrogen (1) H–3 (see tritium) Indium (49) In–113 m IV In–114 m III In–115 m IV In–115 IV Iodine (53) I–124 IV I–125 III m Metastable State. Element * Radionuclide *** Group I–126 III I–129 III I–131 III I–132 IV I–133 III I–134 IV I–135 IV Iridium (77) Ir–190 IV Ir–192 III Ir–194 IV Iron (26) Fe–55 IV Fe–59 IV Krypton (36) Kr–85 m III Kr–85 m (uncompressed) ** V Kr–85 III Kr–85 (uncompressed) ** II Kr–87 (uncompressed) ** V Lanthanum (57) La–140 IV Lead (82) Pb–203 IV Pb–210 II Pb–212 II Lutetium (71) Lu–172 IV Lu–177 IV Magnesium (12) Mg–28 IV Manganese (25) Mn–52 IV Mn–54 IV Mn–56 IV Mercury (80) Hg–197 m IV Hg–197 IV Hg–203 IV Mixed fission products (MFP) II Molybdenum (42) Mo–99 IV Neodymium (60) Nd–147 IV Nd–149 IV Neptunium (93) Np–237 I Np–239 I Nickel (28) Ni–56 III Ni–59 IV Ni–63 IV Ni–65 IV Niobium (41) Nb–93 m IV Nb–95 IV Nb–97 IV Osmium (76) Os–185 IV Os–191 m IV Os–191 IV Os–193 IV Palladium (46) Pd–103 IV Pd–109 IV Phosphorus (15) P–32 IV Platinum (78) Pt–191 IV Pt–193 IV ** Uncompressed means at a pressure not exceeding one atmosphere. m Metastable State. Element * Radionuclide *** Group Pt–193 m I Pt–197 m IV Pt–197 IV Plutonium (94) Pu–238 (F) I Pu–239 (F) I Pu–240 I Pu–241 (F) I Pu–242 I Polonium (84) Po–210 I Potassium (19) K–42 IV K–43 III Praseodymium (59) Pr–142 IV Pr–143 IV Promethium (61) Pm–147 IV Pm–149 IV Protactinium (91) Pa–230 I Pa–231 I Pa–233 II Radium (88) Ra–223 II Ra–224 II Ra–226 I Ra–228 I Radon (86) Rn–220 IV Rn–222 II Rhenium (75) Re–183 IV Re–186 IV Re–187 IV Re–188 IV Re Natural IV Rhodium (45) Rh–103 m IV Rh–105 IV Rubidium (37) Rb–86 IV Rb–87 IV Rb Natural IV Ruthenium (44) Ru–97 IV Ru–103 IV Ru–105 IV Ru–106 III Samarium (62) Sm–145 III Sm–147 III Sm–151 IV Sm–153 IV Scandium (21) Sc–46 III Sc–47 IV Sc–48 IV Selenium (34) Se–75 IV Silicon (14) Si–31 IV Silver (47) Ag–105 IV Ag–110 m III Ag–111 IV Sodium (11) Na–22 III

         1. (F) Fissile material.
         2. (F) Fissile material. m Metastable State. Element * Radionuclide *** Group Na–24 IV Strontium (38) Sr–85 m IV Sr–85 IV Sr–89 III Sr–90 II Sr–91 III Sr–92 IV Sulfur (16) S–35 IV Tantalum (73) Ta–182 III Technetium (43) Tc–9610 IV Tc–96 IV Tc–97 m IV Tc–97 IV Tc–99 m IV Tc–99 IV Tellurium (52) Te–125 m IV Te–127 m IV Te–127 IV Te–129 m III Te–129 IV Te–131 m III Te–132 IV Terbium (65) Tb–160 III Thallium (81) Tl–200 IV Tl–201 IV Tl–202 IV Tl–204 III Thorium (90) Th–227 II Th–228 I Th–230 I Th–231 I Th–232 III Th–234 II Th Natural III Thulium (69) Tm–168 III Tm–170 III Tm–171 IV Tin (50) Sn–113 IV Sn–117 m III Sn–121 III Sn–125 IV Tritium (1) H–3 IV H–3 (as a gas, as luminous paint, or absorbed on solid material) VII Tungsten (74) W–181 IV W–185 IV W–187 IV Uranium (92) U–230 II U–232 I U–233 (F) II U–234 II U–235 (F) III 10 Metasable State
         3. (F) Fissile material. Element * Radionuclide *** Group U–236 II U–238 III U Natural III U Enriched (F) III U Depleted III Vanadium (23) V–48 IV V–49 III Xenon (54) Xe–125 III Xe–131 m III Xe–131 m (uncompressed) ** V Xe–133 III Xe–133 (uncompressed) ** VI Xe–135 II Xe–135 (uncompressed) ** V Ytterbium (70) Yb–175 IV Yttrium (39) Y–88 III Y–90 IV Y–91 m III Y–91 III Y–92 IV Y–93 IV Zinc (30) Zn–65 IV Zn–69 m IV Zn–68 IV Zn–69 IV Zirconium (40) Zr–93 IV Zr–95 III Zr–97 IV

Authority: T.C.A. §§ 4-5-201, et seq., and 68-202-101, et seq. Administrative History: Original rule filed February 22, 2012; effective May 22, 2012.