Nevada Administrative Code › Chapter 459 - Hazardous Materials › RADIATION CONTROL › Licensing of Radioactive Material › Section 459.186 - Table of exempt concentrations

Current through June 11,
				  2024
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.
2
									µCi/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