459.186 - Table of exempt concentrations

459.186. Table of exempt concentrations

Exempt concentrations are:

Element (atomic number) Isotope Column I Gas con- centration µCi/ml1 Column II Liquid and solid concen- tration µCi/ml2
           
Antimony (51) Sb 122    3 x 10-4
   Sb 124    2 x 10-4
   Sb 125    1 x 10-3
Argon (18) Ar 37 1 x 10-3   
   Ar 41 4 x 10-7   
Arsenic (33) As 73    5 x 10-3
   As 74    5 x 10-4
   As 76    2 x 10-4
   As 77    8 x 10-4
Barium (56) Ba 131    2 x 10-3
   Ba 140    3 x 10-4
Beryllium (4) Be 7    2 x 10-2
Bismuth (83) Bi 206    4 x 10-4
Bromine (35) Br 82 4 x 10-7 3 x 10-3
Cadmium (48) Cd 109    2 x 10-3
   Cd 115m    3 x 10-4
   Cd 115    3 x 10-4
Calcium (20) Ca 45    9 x 10-5
   Ca 47    5 x 10-4
Carbon (6) C 14 1 x 10-6 8 x 10-3
Cerium (58) Ce 141    9 x 10-4
   Ce 143    4 x 10-4
   Ce 144    1 x 10-4
Cesium (55) Cs 131    2 x 10-2
   Cs 134m    6 x 10-2
   Cs 134    9 x 10-5
Chlorine (17) Cl 38 9 x 10-7 4 x 10-3
Chromium (24) Cr 51    2 x 10-2
Cobalt (27) Co 57    5 x 10-3
   Co 58    1 x 10-3
   Co 60    5 x 10-4
Copper (29) Cu 64    3 x 10-3
Dysprosium (66) Dy 165    4 x 10-3
   Dy 166    4 x 10-4
Erbium (68) Er 169    9 x 10-4
   Er 171    1 x 10-3
Europium (63) Eu 152    6 x 10-4
   (Tr=9.2 h)      
   Eu 155    2 x 10-3
Fluorine (9) F 18 2 x 10-6 8 x 10-3
Gadolinium (64) Gd 153    2 x 10-3
   Gd 159    8 x 10-4
Gallium (31) Ga 72    4 x 10-4
Germanium (32) Ge 71    2 x 10-2
Gold (79) Au 196    2 x 10-3
   Au 198    5 x 10-4
   Au 199    2 x 10-3
Hafnium (72) Hf 181    7 x 10-4
Hydrogen (1) H 3 5 x 10-6 3 x 10-2
Indium (49) In 113m    1 x 10-2
   In 114m    2 x 10-4
Iodine (53) I 126 3 x 10-9 2 x 10-5
   I 131 3 x 10-9 2 x 10-5
   I 132 8 x 10-8 6 x 10-4
   I 133 1 x 10-8 7 x 10-5
   I 134 2 x 10-7 1 x 10-3
Iridium (77) Ir 190    2 x 10-3
   Ir 192    4 x 10-4
   Ir 194    3 x 10-4
Iron (26) Fe 55    8 x 10-3
   Fe 59    6 x 10-4
Krypton (36) Kr 85m 1 x 10-6   
   Kr 85 3 x 10-6   
Lanthanum (57) La 140    2 x 10-4
Lead (82) Pb 203    4 x 10-3
Lutetium (71) Lu 177    1 x 10-3
Manganese (25) Mn 52    3 x 10-4
   Mn 54    1 x 10-3
   Mn 56    1 x 10-3
Mercury (80) Hg 197m    2 x 10-3
   Hg 197    3 x 10-3
   Hg 203    2 x 10-4
Molybdenum (42) Mo 99    2 x 10-3
Neodymium (60) Nd 147    6 x 10-4
   Nd 149    3 x 10-3
Nickel (28) Ni 65    1 x 10-3
Niobium         
(Columbium) (41) Nb 95    1 x 10-3
   Nb 97    9 x 10-3
Osmium (76) Os 185    7 x 10-4
   Os 191m    3 x 10-2
   Os 191    2 x 10-3
   Os 193    6 x 10-4
Palladium (46) Pd 103    3 x 10-3
   Pd 109    9 x 10-4
Phosphorus (15) P 32    2 x 10-4
Platinum (78) Pt 191    1 x 10-3
   Pt 193m    1 x 10-2
   Pt 197m    1 x 10-2
   Pt 197    1 x 10-3
Potassium (19) K 42    3 x 10-3
Praseodymium (59) Pr 142    3 x 10-4
   Pr 143    5 x 10-4
Promethium (61) Pm 147    2 x 10-3
   Pm 149    4 x 10-4
Rhenium (75) Re 183    6 x 10-3
   Re 186    9 x 10-4
   Re 188    6 x 10-4
Rhodium (45) Rh 103m    1 x 10-1
   Rh 105    1 x 10-3
Rubidium (37) Rb 86    7 x 10-4
Ruthenium (44) Ru 97    4 x 10-3
   Ru 103    8 x 10-4
   Ru 105    1 x 10-3
   Ru 106    1 x 10-4
Samarium (62) Sm 153    8 x 10-4
Scandium (21) Sc 46    4 x 10-4
   Sc 47    9 x 10-4
   Sc 48    3 x 10-4
Selenium (34) Se 75    3 x 10-3
Silicon (14) Si 31    9 x 10-3
Silver (47) Ag 105    1 x 10-3
   Ag 110m    3 x 10-4
   Ag 111    4 x 10-4
Sodium (11) Na 24    2 x 10-3
Strontium (38) Sr 85    1 x 10-3
   Sr 89    1 x 10-4
   Sr 91    7 x 10-4
   Sr 92    7 x 10-4
Sulfur (16) S 35 9 x 10-8 6 x 10-4
Tantalum (73) Ta 182    4 x 10-4
Technetium (43) Tc 96m    1 x 10-1
   Tc 96    1 x 10-3
Tellurium (52) Te 125m    2 x 10-3
   Te 127m    6 x 10-4
   Te 127    3 x 10-3
   Te 129m    3 x 10-4
   Te 131m    6 x 10-4
   Te 132    3 x 10-4
Terbium (65) Tb 160    4 x 10-4
Thallium (81) Tl 200    4 x 10-3
   Tl 201    3 x 10-3
   Tl 202    1 x 10-3
   Tl 204    1 x 10-3
Thulium (69) Tm 170    5 x 10-4
   Tm 171    5 x 10-3
Tin (50) Sn 113    9 x 10-4
   Sn 125    2 x 10-4
Tungsten         
(Wolfram) (74) W 181    4 x 10-3
   W 187    7 x 10-4
Vanadium (23) V 48    3 x 10-4
Xenon (54) Xe 131m 4 x 10-6   
   Xe 133 3 x 10-6   
   Xe 135 1 x 10-6   
Ytterbium (70) Yb 175    1 x 10-3
Yttrium (39) Y 90    2 x 10-4
   Y 91m    3 x 10-2
   Y 91    3 x 10-4
   Y 92    6 x 10-4
   Y 93    3 x 10-4
Zinc (30) Zn 65    1 x 10-3
   Zn 69m    7 x 10-4
   Zn 69    2 x 10-2
Zirconium (40) Zr 95    6 x 10-4
   Zr 97    2 x 10-4
Beta, gamma, or both, emitting radioactive material not listed above with a half-life of less than 3 years.         
        
        
        
        
   1 x 10-10 1 x 10-6

1 Values are given in Column I only for those materials normally used as gases.

2µCi/gm for solids.

m Metastable state.

Concentration present in the product and the exempt concentration established in this section for the specific isotope when not in combination. The sum of such ratios may not exceed "1," that is, unity. An example is:

Concentration of Isotope A in Product / Exempt concentration of Isotope A + Concentration of Isotope B in Product / Exempt concentration of Isotope B=1

Note 1: Many radioisotopes disintegrate into isotopes which are also radioactive. In expressing the concentrations in the table, the activity stated is that of the parent isotope and takes into account the daughters.

Note 2: For the purposes of NAC 459.184 where there is involved a combination of isotopes, the limit for the combination should be derived as follows: Determine for each isotope in the product the ratio between the concentration present in the product and the exempt concentration.

Bd. of Health, Radiation Control Reg. Art. 3, Appendix A, eff. 2-28-80-NAC A by R084-98, 1-26-99

NRS 459.201

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