HTML has links - PDF has Authentication
246-231-188  <<  246-231-200 >>   End of Chapter

PDFWAC 246-231-200

Appendix ADetermination of A1 and A2.

(1) Values of A1 and A2 for individual radionuclides, which are the basis for many activity limits elsewhere in these regulations, are given in this section, Table A-1. The curie (Ci) values specified are obtained by converting from the Terabecquerel (TBq) value. The Terabecquerel values are the regulatory standard. The curie values are for information only and are not intended to be the regulatory standard. Where values of A1 or A2 are unlimited, it is for radiation control purposes only. For nuclear criticality safety, some materials are subject to controls placed on fissile material.
(2)(a) For individual radionuclides whose identities are known, but which are not listed in this section, Table A-1, the A1 and A2 values contained in this section, Table A-3 may be used. Otherwise, the licensee shall obtain prior NRC approval of the A1 and A2 values for radionuclides not listed in this section, Table A-1, before shipping the material.
(b) For individual radionuclides whose identities are known, but which are not listed in this section, Table A-2, the exempt material activity concentration and exempt consignment activity values contained in this section, Table A-3 may be used. Otherwise, the licensee shall obtain prior NRC approval of the exempt material activity concentration and exempt consignment activity values for radionuclides not listed in this section, Table A-2, before shipping the material.
(c) The licensee shall submit requests for prior approval, described under (a) and (b) of this subsection, to NRC in accordance with 10 C.F.R. 71.1.
(3) In the calculations of A1 and A2 for a radionuclide not in this section, Table A-1, a single radioactive decay chain, in which radionuclides are present in their naturally occurring proportions, and in which no daughter radionuclide has a half-life either longer than ten days, or longer than that of the parent radionuclide, shall be considered as a single radionuclide, and the activity to be taken into account, and the A1 or A2 value to be applied shall be those corresponding to the parent radionuclide of that chain. In the case of radioactive decay chains in which any daughter radionuclide has a half-life either longer than ten days, or greater than that of the parent radionuclide, the parent and those daughter radionuclides shall be considered as mixtures of different radionuclides.
(4) For mixtures of radionuclides whose identities and respective activities are known, the following conditions apply:
(a) For special form radioactive material, the maximum quantity transported in a Type A package is as follows:
Where B(i) is the activity of radionuclide i in special form, and A1(i) is the A1 value for radionuclide i.
(b) For normal form radioactive material, the maximum quantity transported in a Type A package:
Where B(i) is the activity of radionuclide i in normal form, and A2(i) is the A2 value for radionuclide i.
(c) If the package contains both special and normal form radioactive material, the activity that may be transported in a Type A package is as follows:
Where B(i) is the activity of radionuclide i as special form radioactive material, A1(i) is the A1 value for radionuclide i, C(j) is the activity of radionuclide j as normal form radioactive material, and A2(j) is the A2 value for radionuclide j.
(d) Alternatively, the A1 value for mixtures of special form material may be determined as follows:
Where f(i) is the fraction of activity for radionuclide i in the mixture and A1(i) is the appropriate A1 value for radionuclide i.
(e) Alternatively, the A2 value for mixtures of normal form material may be determined as follows:
Where f(i) is the fraction of activity for radionuclide i in the mixture and A2(i) is the appropriate A2 value for radionuclide i.
(f) The exempt activity concentration for mixtures of nuclides may be determined as follows:
Where f(i) is the fraction of activity concentration of radionuclide i in the mixture, and [A](i) is the activity concentration for exempt material containing radionuclide i.
(g) The activity limit for an exempt consignment for mixtures of radionuclides may be determined as follows:
Where f(i) is the fraction of activity of radionuclide i in the mixture and A(i) is the activity limit for exempt consignments for radionuclide i.
(5)(a) When the identity of each radionuclide is known, but the individual activities of some of the radionuclides are not known, the radionuclides may be grouped and the lowest A1 or A2 value, as appropriate, for the radionuclides in each group may be used in applying the formulas in subsection (4) of this section. Groups may be based on the total alpha activity and the total beta/gamma activity when these are known, using the lowest A1 or A2 values for the alpha emitters and beta/gamma emitters.
(b) When the identity of each radionuclide is known but the individual activities of some of the radionuclides are not known, the radionuclides may be grouped and the lowest [A] (activity concentration for exempt material) or A (activity limit for exempt consignment) value, as appropriate, for the radionuclides in each group may be used in applying the formulas in paragraph IV of this appendix. Groups may be based on the total alpha activity and the total beta/gamma activity when these are known, using the lowest [A] or A values for the alpha emitters and beta/gamma emitters, respectively.
Table A-1.—A1 and A2 Values for Radionuclides
Symbol of radionuclide
Element and atomic number
A1 (TBq)
A1 (Ci)b
A2 (TBq)
A2 (Ci)b
Specific activity
(TBq/g)
(Ci/g)
Ac-225 (a)
Actinium (89)
8.0X10-1
2.2X101
6.0X10-3
1.6X10-1
2.1X103
5.8X104
Ac-227 (a)
 
9.0X10-1
2.4X101
9.0X10-5
2.4X10-3
2.7
7.2X101
Ac-228
 
6.0X10-1
1.6X101
5.0X10-1
1.4X101
8.4X104
2.2X106
Ag-105
Silver (47)
2.0
5.4X101
2.0
5.4X101
1.1X103
3.0X104
Ag-108m (a)
 
7.0X10-1
1.9X101
7.0X10-1
1.9X101
9.7X10-1
2.6X101
Ag-110m (a)
 
4.0X10-1
1.1X101
4.0X10-1
1.1X101
1.8X102
4.7X103
Ag-111
 
2.0
5.4X101
6.0X10-1
1.6X101
5.8X103
1.6X105
Al-26
Aluminum (13)
1.0X10-1
2.7
1.0X10-1
2.7
7.0X10-4
1.9X10-2
Am-241
Americium (95)
1.0X101
2.7X102
1.0X10-3
2.7X10-2
1.3X10-1
3.4
Am-242m (a)
 
1.0X101
2.7X102
1.0X10-3
2.7X10-2
3.6X10-1
1.0X101
Am-243 (a)
 
5.0
1.4X102
1.0X10-3
2.7X10-2
7.4X10-3
2.0X10-1
Ar-37
Argon (18)
4.0X101
1.1X103
4.0X101
1.1X103
3.7X103
9.9X104
Ar-39
 
4.0X101
1.1X103
2.0X101
5.4X102
1.3
3.4X101
Ar-41
 
3.0X10-1
8.1
3.0X10-1
8.1
1.5X106
4.2X107
As-72
Arsenic (33)
3.0X10-1
8.1
3.0X10-1
8.1
6.2X104
1.7X106
As-73
 
4.0X101
1.1X103
4.0X101
1.1X103
8.2X102
2.2X104
As-74
 
1.0
2.7X101
9.0X10-1
2.4X101
3.7X103
9.9X104
As-76
 
3.0X10-1
8.1
3.0X10-1
8.1
5.8X104
1.6X106
As-77
 
2.0X101
5.4X102
7.0X10-1
1.9X101
3.9X104
1.0X106
At-211 (a)
Astatine (85)
2.0X101
5.4X102
5.0X10-1
1.4X101
7.6X104
2.1X106
Au-193
Gold (79)
7.0
1.9X102
2.0
5.4X101
3.4X104
9.2X105
Au-194
 
1.0
2.7X101
1.0
2.7X101
1.5X104
4.1X105
Au-195
 
1.0X101
2.7X102
6.0
1.6X102
1.4X102
3.7X103
Au-198
 
1.0
2.7X101
6.0X10-1
1.6X101
9.0X103
2.4X105
Au-199
 
1.0X101
2.7X102
6.0X10-1
1.6X101
7.7X103
2.1X105
Ba-131 (a)
Barium (56)
2.0
5.4X101
2.0
5.4X101
3.1X103
8.4X104
Ba-133
 
3.0
8.1X101
3.0
8.1X101
9.4
2.6X102
Ba-133m
 
2.0X101
5.4X102
6.0X10-1
1.6X101
2.2X104
6.1X105
Ba-140 (a)
 
5.0X10-1
1.4X101
3.0X10-1
8.1
2.7X103
7.3X104
Be-7
Beryllium (4)
2.0X101
5.4X102
2.0X101
5.4X102
1.3X104
3.5X105
Be-10
 
4.0X101
1.1X103
6.0X10-1
1.6X101
8.3X10-4
2.2X10-2
Bi-205
Bismuth (83)
7.0X10-1
1.9X101
7.0X10-1
1.9X101
1.5X103
4.2X104
Bi-206
 
3.0X10-1
8.1
3.0X10-1
8.1
3.8X103
1.0X105
Bi-207
 
7.0X10-1
1.9X101
7.0X10-1
1.9X101
1.9
5.2X101
Bi-210
 
1.0
2.7X101
6.0X10-1
1.6X101
4.6X103
1.2X105
Bi-210m (a)
 
6.0X10-1
1.6X101
2.0X10-2
5.4X10-1
2.1X10-5
5.7X10-4
Bi-212 (a)
 
7.0X10-1
1.9X101
6.0X10-1
1.6X101
5.4X105
1.5X107
Bk-247
Berkelium (97)
8.0
2.2X102
8.0X10-4
2.2X10-2
3.8X10-2
1.0
Bk-249 (a)
 
4.0X101
1.1X103
3.0X10-1
8.1
6.1X101
1.6X103
Br-76
Bromine (35)
4.0X10-1
1.1X101
4.0X10-1
1.1X101
9.4X104
2.5X106
Br-77
 
3.0
8.1X101
3.0
8.1X101
2.6X104
7.1X105
Br-82
 
4.0X10-1
1.1X101
4.0X10-1
1.1X101
4.0X104
1.1X106
C-11
Carbon (6)
1.0
2.7X101
6.0X10-1
1.6X101
3.1X107
8.4X108
C-14
 
4.0X101
1.1X103
3.0
8.1X101
1.6X10-1
4.5
Ca-41
Calcium (20)
Unlimited
Unlimited
Unlimited
Unlimited
3.1X10-3
8.5X10-2
Ca-45
 
4.0X101
1.1X103
1.0
2.7X101
6.6X102
1.8X104
Ca-47 (a)
 
3.0
8.1X101
3.0X10-1
8.1
2.3X104
6.1X105
Cd-109
Cadmium (48)
3.0X101
8.1X102
2.0
5.4X101
9.6X101
2.6X103
Cd-113m
 
4.0X101
1.1X103
5.0X10-1
1.4X101
8.3
2.2X102
Cd-115 (a)
 
3.0
8.1X101
4.0X10-1
1.1X101
1.9X104
5.1X105
Cd-115m
 
5.0X10-1
1.4X101
5.0X10-1
1.4X101
9.4X102
2.5X104
Ce-139
Cerium (58)
7.0
1.9X102
2.0
5.4X101
2.5X102
6.8X103
Ce-141
 
2.0X101
5.4X102
6.0X10-1
1.6X101
1.1X103
2.8X104
Ce-143
 
9.0X10-1
2.4X101
6.0X10-1
1.6X101
2.5X104
6.6X105
Ce-144 (a)
 
2.0X10-1
5.4
2.0X10-1
5.4
1.2X102
3.2X103
Cf-248
Californium (98)
4.0X101
1.1X103
6.0X10-3
1.6X10-1
5.8X101
1.6X103
Cf-249
 
3.0
8.1X101
8.0X10-4
2.2X10-2
1.5X10-1
4.1
Cf-250
 
2.0X101
5.4X102
2.0X10-3
5.4X10-2
4.0
1.1X102
Cf-251
 
7.0
1.9X102
7.0X10-4
1.9X10-2
5.9X10-2
1.6
Cf-252
 
1.0X10-1
2.7
3.0X10-3
8.1X10-2
2.0X101
5.4X102
Cf-253 (a)
 
4.0X101
1.1X103
4.0X10-2
1.1
1.1X103
2.9X104
Cf-254
 
1.0X10-3
2.7X10-2
1.0X10-3
2.7X10-2
3.1X102
8.5X103
Cl-36
Chlorine (17)
1.0X101
2.7X102
6.0X10-1
1.6X101
1.2X10-3
3.3X10-2
Cl-38
 
2.0X10-1
5.4
2.0X10-1
5.4
4.9X106
1.3X108
Cm-240
Curium (96)
4.0X101
1.1X103
2.0X10-2
5.4X10-1
7.5X102
2.0X104
Cm-241
 
2.0
5.4X101
1.0
2.7X101
6.1X102
1.7X104
Cm-242
 
4.0X101
1.1X103
1.0X10-2
2.7X10-1
1.2X102
3.3X103
Cm-243
 
9.0
2.4X102
1.0X10-3
2.7X10-2
1.9X10-3
5.2X101
Cm-244
 
2.0X101
5.4X102
2.0X10-3
5.4X10-2
3.0
8.1X101
Cm-245
 
9.0
2.4X102
9.0X10-4
2.4X10-2
6.4X10-3
1.7X10-1
Cm-246
 
9.0
2.4X102
9.0X10-4
2.4X10-2
1.1X10-2
3.1X10-1
Cm-247 (a)
 
3.0
8.1X101
1.0X10-3
2.7X10-2
3.4X10-6
9.3X10-5
Cm-248
 
2.0X10-2
5.4X10-1
3.0X10-4
8.1X10-3
1.6X10-4
4.2X10-3
Co-55
Cobalt (27)
5.0X10-1
1.4X101
5.0X10-1
1.4X101
1.1X105
3.1X106
Co-56
 
3.0X10-1
8.1
3.0X10-1
8.1
1.1X103
3.0X104
Co-57
 
1.0X101
2.7X102
1.0X101
2.7X102
3.1X102
8.4X103
Co-58
 
1.0
2.7X101
1.0
2.7X101
1.2X103
3.2X104
Co-58m
 
4.0X101
1.1X103
4.0X101
1.1X103
2.2X105
5.9X106
Co-60
 
4.0X10-1
1.1X101
4.0X10-1
1.1X101
4.2X101
1.1X103
Cr-51
Chromium (24)
3.0X101
8.1X102
3.0X101
8.1X102
3.4X103
9.2X104
Cs-129
Cesium (55)
4.0
1.1X102
4.0
1.1X102
2.8X104
7.6X105
Cs-131
 
3.0X101
8.1X102
3.0X101
8.1X102
3.8X103
1.0X105
Cs-132
 
1.0
2.7X101
1.0
2.7X101
5.7X103
1.5X105
Cs-134
 
7.0X10-1
1.9X101
7.0X10-1
1.9X101
4.8X101
1.3X103
Cs-134m
 
4.0X101
1.1X103
6.0X10-1
1.6X101
3.0X105
8.0X106
Cs-135
 
4.0X101
1.1X103
1.0
2.7X101
4.3X10-5
1.2X10-3
Cs-136
 
5.0X10-1
1.4X101
5.0X10-1
1.4X101
2.7X103
7.3X104
Cs-137 (a)
 
2.0
5.4X101
6.0X10-1
1.6X101
3.2
8.7X101
Cu-64
Copper (29)
6.0
1.6X102
1.0
2.7X101
1.4X105
3.9X106
Cu-67
 
1.0X101
2.7X102
7.0X10-1
1.9X101
2.8X104
7.6X105
Dy-159
Dysprosium (66)
2.0X101
5.4X102
2.0X101
5.4X102
2.1X102
5.7X103
Dy-165
 
9.0X10-1
2.4X101
6.0X10-1
1.6X101
3.0X105
8.2X106
Dy-166 (a)
 
9.0X10-1
2.4X101
3.0X10-1
8.1
8.6X103
2.3X105
Er-169
Erbium (68)
4.0X101
1.1X103
1.0
2.7X101
3.1X103
8.3X104
Er-171
 
8.0X10-1
2.2X101
5.0X10-1
1.4X101
9.0X104
2.4X106
Eu-147
Europium (63)
2.0
5.4X101
2.0
5.4X101
1.4X103
3.7X104
Eu-148
 
5.0X10-1
1.4X101
5.0X10-1
1.4X101
6.0X102
1.6X104
Eu-149
 
2.0X101
5.4X102
2.0X101
5.4X102
3.5X102
9.4X103
Eu-150 (short lived)
 
2.0
5.4X101
7.0X10-1
1.9X101
6.1X104
1.6X106
Eu-150 (long lived)
 
7.0X10-1
1.9X101
7.0X10-1
1.9X101
6.1X104
1.6X106
Eu-152
 
1.0
2.7X101
1.0
2.7X101
6.5
1.8X102
Eu-152m
 
8.0X10-1
2.2X101
8.0X10-1
2.2X101
8.2X104
2.2X106
Eu-154
 
9.0X10-1
2.4X101
6.0X10-1
1.6X101
9.8
2.6X102
Eu-155
 
2.0X101
5.4X102
3.0
8.1X101
1.8X101
4.9X102
Eu-156
 
7.0X10-1
1.9X101
7.0X10-1
1.9X101
2.0X103
5.5X104
F-18
Fluorine (9)
1.0
2.7X101
6.0X10-1
1.6X101
3.5X106
9.5X107
Fe-52 (a)
Iron (26)
3.0X10-1
8.1
3.0X10-1
8.1
2.7X105
7.3X106
Fe-55
 
4.0X101
1.1X103
4.0X101
1.1X103
8.8X101
2.4X103
Fe-59
 
9.0X10-1
2.4X101
9.0X10-1
2.4X101
1.8X103
5.0X104
Fe-60 (a)
 
4.0X101
1.1X103
2.0X10-1
5.4
7.4X10-4
2.0X10-2
Ga-67
Gallium (31)
7.0
1.9X102
3.0
8.1X101
2.2X104
6.0X105
Ga-68
 
5.0X10-1
1.4X101
5.0X10-1
1.4X101
1.5X106
4.1X107
Ga-72
 
4.0X10-1
1.1X101
4.0X10-1
1.1X101
1.1X105
3.1X106
Gd-146 (a)
Gadolinium (64)
5.0X10-1
1.4X101
5.0X10-1
1.4X101
6.9X102
1.9X104
Gd-148
 
2.0X101
5.4X102
2.0X10-3
5.4X10-2
1.2
3.2X101
Gd-153
 
1.0X101
2.7X102
9.0
2.4X102
1.3X102
3.5X103
Gd-159
 
3.0
8.1X101
6.0X10-1
1.6X101
3.9X104
1.1X106
Ge-68 (a)
Germanium (32)
5.0X10-1
1.4X101
5.0X10-1
1.4X101
2.6X102
7.1X103
Ge-71
 
4.0X101
1.1X103
4.0X101
1.1X103
5.8X103
1.6X105
Ge-77
 
3.0X10-1
8.1
3.0X10-1
8.1
1.3X105
3.6X106
Hf-172 (a)
Hafnium (72)
6.0X10-1
1.6X101
6.0X10-1
1.6X101
4.1X101
1.1X103
Hf-175
 
3.0
8.1X101
3.0
8.1X101
3.9X102
1.1X104
Hf-181
 
2.0
5.4X101
5.0X10-1
1.4X101
6.3X102
1.7X104
Hf-182
 
Unlimited
Unlimited
Unlimited
Unlimited
8.1X10-6
2.2X10-4
Hg-194 (a)
Mercury (80)
1.0
2.7X101
1.0
2.7X101
1.3X10-1
3.5
Hg-195m (a)
 
3.0
8.1X101
7.0X10-1
1.9X101
1.5X104
4.0X105
Hg-197
 
2.0X101
5.4X102
1.0X101
2.7X102
9.2X103
2.5X105
Hg-197m
 
1.0X101
2.7X102
4.0X10-1
1.1X101
2.5X104
6.7X105
Hg-203
 
5.0
1.4X102
1.0
2.7X101
5.1X102
1.4X104
Ho-166
Holmium (67)
4.0X10-1
1.1X101
4.0X10-1
1.1X101
2.6X104
7.0X105
Ho-166m
 
6.0X10-1
1.6X101
5.0X10-1
1.4X101
6.6X10-2
1.8
I-123
Iodine (53)
6.0
1.6X102
3.0
8.1X101
7.1X104
1.9X106
I-124
 
1.0
2.7X101
1.0
2.7X101
9.3X103
2.5X105
I-125
 
2.0X101
5.4X102
3.0
8.1X101
6.4X102
1.7X104
I-126
 
2.0
5.4X101
1.0
2.7X101
2.9X103
8.0X104
I-129
 
Unlimited
Unlimited
Unlimited
Unlimited
6.5X10-6
1.8X10-4
I-131
 
3.0
8.1X101
7.0X10-1
1.9X101
4.6X103
1.2X105
I-132
 
4.0X10-1
1.1X101
4.0X10-1
1.1X101
3.8X105
1.0X107
I-133
 
7.0X10-1
1.9X101
6.0X10-1
1.6X101
4.2X104
1.1X106
I-134
 
3.0X10-1
8.1
3.0X10-1
8.1
9.9X105
2.7X107
I-135 (a)
 
6.0X10-1
1.6X101
6.0X10-1
1.6X101
1.3X105
3.5X106
In-111
Indium (49)
3.0
8.1X101
3.0
8.1X101
1.5X104
4.2X105
In-113m
 
4.0
1.1X102
2.0
5.4X101
6.2X105
1.7X107
In-114m (a)
 
1.0X101
2.7X102
5.0X10-1
1.4X101
8.6X102
2.3X104
In-115m
 
7.0
1.9X102
1.0
2.7X101
2.2X105
6.1X106
Ir-189 (a)
Iridium (77)
1.0X101
2.7X102
1.0X101
2.7X102
1.9X103
5.2X104
Ir-190
 
7.0X10-1
1.9X101
7.0X10-1
1.9X101
2.3X103
6.2X104
Ir-192
 
c1.0
c2.7X101
6.0X10-1
1.6X101
3.4X102
9.2X103
Ir-194
 
3.0X10-1
8.1
3.0X10-1
8.1
3.1X104
8.4X105
K-40
Potassium (19)
9.0X10-1
2.4X101
9.0X10-1
2.4X101
2.4X10-7
6.4X10-6
K-42
 
2.0X10-1
5.4
2.0X10-1
5.4
2.2X105
6.0X106
K-43
 
7.0X10-1
1.9X101
6.0X10-1
1.6X101
1.2X105
3.3X106
Kr-79
Krypton (36)
4.0
1.1X102
2.0
5.4X101
4.2X104
1.1X106
Kr-81
 
4.0X101
1.1X103
4.0X101
1.1X103
7.8X10-4
2.1X10-2
Kr-85
 
1.0X101
2.7X102
1.0X101
2.7X102
1.5X101
3.9X102
Kr-85m
 
8.0
2.2X102
3.0
8.1X101
3.0X105
8.2X106
Kr-87
 
2.0X10-1
5.4
2.0X10-1
5.4
1.0X106
2.8X107
La-137
Lanthanum (57)
3.0X101
8.1X102
6.0
1.6X102
1.6X10-3
4.4X10-2
La-140
 
4.0X10-1
1.1X101
4.0X10-1
1.1X101
2.1X104
5.6X105
Lu-172
Lutetium (71)
6.0X10-1
1.6X101
6.0X10-1
1.6X101
4.2X103
1.1X105
Lu-173
 
8.0
2.2X102
8.0
2.2X102
5.6X101
1.5X103
Lu-174
 
9.0
2.4X102
9.0
2.4X102
2.3X101
6.2X102
Lu-174m
 
2.0X101
5.4X102
1.0X101
2.7X102
2.0X102
5.3X103
Lu-177
 
3.0X101
8.1X102
7.0X10-1
1.9X101
4.1X103
1.1X105
Mg-28 (a)
Magnesium (12)
3.0X10-1
8.1
3.0X10-1
8.1
2.0X105
5.4X106
Mn-52
Manganese (25)
3.0X10-1
8.1
3.0X10-1
8.1
1.6X104
4.4X105
Mn-53
 
Unlimited
Unlimited
Unlimited
Unlimited
6.8X10-5
1.8X10-3
Mn-54
 
1.0
2.7X101
1.0
2.7X101
2.9X102
7.7X103
Mn-56
 
3.0X10-1
8.1
3.0X10-1
8.1
8.0X105
2.2X107
Mo-93
Molybdenum (42)
4.0X101
1.1X103
2.0X101
5.4X102
4.1X10-2
1.1
Mo-99 (a) (h)
 
1.0
2.7X101
6.0X10-1
1.6X101
1.8X104
4.8X105
N-13
Nitrogen (7)
9.0X10-1
2.4X101
6.0X10-1
1.6X101
5.4X107
1.5X109
Na-22
Sodium (11)
5.0X10-1
1.4X101
5.0X10-1
1.4X101
2.3X102
6.3X103
Na-24
 
2.0X10-1
5.4
2.0X10-1
5.4
3.2X105
8.7X106
Nb-93m
Niobium (41)
4.0X101
1.1X103
3.0X101
8.1X102
8.8
2.4X102
Nb-94
 
7.0X10-1
1.9X101
7.0X10-1
1.9X101
6.9X10-3
1.9X10-1
Nb-95
 
1.0
2.7X101
1.0
2.7X101
1.5X103
3.9X104
Nb-97
 
9.0X10-1
2.4X101
6.0X10-1
1.6X101
9.9X105
2.7X107
Nd-147
Neodymium (60)
6.0
1.6X102
6.0X10-1
1.6X101
3.0X103
8.1X104
Nd-149
 
6.0X10-1
1.6X101
5.0X10-1
1.4X101
4.5X105
1.2X107
Ni-59
Nickel (28)
Unlimited
Unlimited
Unlimited
Unlimited
3.0X10-3
8.0X10-2
Ni-63
 
4.0X101
1.1X103
3.0X101
8.1X102
2.1
5.7X101
Ni-65
 
4.0X10-1
1.1X101
4.0X10-1
1.1X101
7.1X105
1.9X107
Np-235
Neptunium (93)
4.0X101
1.1X103
4.0X101
1.1X103
5.2X101
1.4X103
Np-236 (short-lived)
 
2.0X101
5.4X102
2.0
5.4X101
4.7X10-4
1.3X10-2
Np-236 (long-lived)
 
9.0
2.4X102
2.0X10-2
5.4X10-1
4.7X10-4
1.3X10-2
Np-237
 
2.0X101
5.4X102
2.0X10-3
5.4X10-2
2.6X10-5
7.1X10-4
Np-239
 
7.0
1.9X102
4.0X10-1
1.1X101
8.6X103
2.3X105
Os-185
Osmium (76)
1.0
2.7X101
1.0
2.7X101
2.8X102
7.5X103
Os-191
 
1.0X101
2.7X102
2.0
5.4X101
1.6X103
4.4X104
Os-191m
 
4.0X101
1.1X103
3.0X101
8.1X102
4.6X104
1.3X106
Os-193
 
2.0
5.4X101
6.0X10-1
1.6X101
b2.0X104
5.3X105
Os-194 (a)
 
3.0X10-1
8.1
3.0X10-1
8.1
1.1X101
3.1X102
P-32
Phosphorus (15)
5.0X10-1
1.4X101
5.0X10-1
1.4X101
1.1X104
2.9X105
P-33
 
4.0X101
1.1X103
1.0
2.7X101
5.8X103
1.6X105
Pa-230 (a)
Protactinium (91)
2.0
5.4X101
7.0X10-2
1.9
1.2X103
3.3X104
Pa-231
 
4.0
1.1X102
4.0X10-4
1.1X10-2
1.7X10-3
4.7X10-2
Pa-233
 
5.0
1.4X102
7.0X10-1
1.9X101
7.7X102
2.1X104
Pb-201
Lead (82)
1.0
2.7X101
1.0
2.7X101
6.2X104
1.7X106
Pb-202
 
4.0X101
1.1X103
2.0X101
5.4X102
1.2X10-4
3.4X10-3
Pb-203
 
4.0
1.1X102
3.0
8.1X101
1.1X104
3.0X105
Pb-205
 
Unlimited
Unlimited
Unlimited
Unlimited
4.5X10-6
1.2X10-4
Pb-210 (a)
 
1.0
2.7X101
5.0X10-2
1.4
2.8
7.6X101
Pb-212 (a)
 
7.0X10-1
1.9X101
2.0X10-1
5.4
5.1X104
1.4X106
Pd-103 (a)
Palladium (46)
4.0X101
1.1X103
4.0X101
1.1X103
2.8X103
7.5X104
Pd-107
 
Unlimited
Unlimited
Unlimited
Unlimited
1.9X10-5
5.1X10-4
Pd-109
 
2.0
5.4X101
5.0X10-1
1.4X101
7.9X104
2.1X106
Pm-143
Promethium (61)
3.0
8.1X101
3.0
8.1X101
1.3X102
3.4X103
Pm-144
 
7.0X10-1
1.9X101
7.0X10-1
1.9X101
9.2X101
2.5X103
Pm-145
 
3.0X101
8.1X102
1.0X101
2.7X102
5.2
1.4X102
Pm-147
 
4.0X101
1.1X103
2.0
5.4X101
3.4X101
9.3X102
Pm-148m (a)
 
8.0X10-1
2.2X101
7.0X10-1
1.9X101
7.9X102
2.1X104
Pm-149
 
2.0
5.4X101
6.0X10-1
1.6X101
1.5X104
4.0X105
Pm-151
 
2.0
5.4X101
6.0X10-1
1.6X101
2.7X104
7.3X105
Po-210
Polonium (84)
4.0X101
1.1X103
2.0X10-2
5.4X10-1
1.7X102
4.5X103
Pr-142
Praseodymium (59)
4.0X10-1
1.1X101
4.0X10-1
1.1X101
4.3X104
1.2X106
Pr-143
 
3.0
8.1X101
6.0X10-1
1.6X101
2.5X103
6.7X104
Pt-188 (a)
Platinum (78)
1.0
2.7X101
8.0X10-1
2.2X101
2.5X103
6.8X104
Pt-191
 
4.0
1.1X102
3.0
8.1X101
8.7X103
2.4X105
Pt-193
 
4.0X101
1.1X103
4.0X101
1.1X103
1.4
3.7X101
Pt-193m
 
4.0X101
1.1X103
5.0X10-1
1.4X101
5.8X103
1.6X105
Pt-195m
 
1.0X101
2.7X102
5.0X10-1
1.4X101
6.2X103
1.7X105
Pt-197
 
2.0X101
5.4X102
6.0X10-1
1.6X101
3.2X104
8.7X105
Pt-197m
 
1.0X101
2.7X102
6.0X10-1
1.6X101
3.7X105
1.0X107
Pu-236
Plutonium (94)
3.0X101
8.1X102
3.0X10-3
8.1X10-2
2.0X101
5.3X102
Pu-237
 
2.0X101
5.4X102
2.0X101
5.4X102
4.5X102
1.2X104
Pu-238
 
1.0X101
2.7X102
1.0X10-3
2.7X10-2
6.3X10-1
1.7X101
Pu-239
 
1.0X101
2.7X102
1.0X10-3
2.7X10-2
2.3X10-3
6.2X10-2
Pu-240
 
1.0X101
2.7X102
1.0X10-3
2.7X10-2
8.4X10-3
2.3X10-1
Pu-241 (a)
 
4.0X101
1.1X103
6.0X10-2
1.6
3.8
1.0X102
Pu-242
 
1.0X101
2.7X102
1.0X10-3
2.7X10-2
1.5X10-4
3.9X10-3
Pu-244 (a)
 
4.0X10-1
1.1X101
1.0X10-3
2.7X10-2
6.7X10-7
1.8X10-5
Ra-223 (a)
Radium (88)
4.0X10-1
1.1X101
7.0X10-3
1.9X10-1
1.9X103
5.1X104
Ra-224 (a)
 
4.0X10-1
1.1X101
2.0X10-2
5.4X10-1
5.9X103
1.6X105
Ra-225 (a)
 
2.0X10-1
5.4
4.0X10-3
1.1X10-1
1.5X103
3.9X104
Ra-226 (a)
 
2.0X10-1
5.4
3.0X10-3
8.1X10-2
3.7X10-2
1.0
Ra-228 (a)
 
6.0X10-1
1.6X101
2.0X10-2
5.4X10-1
1.0X101
2.7X102
Rb-81
Rubidium (37)
2.0
5.4X101
8.0X10-1
2.2X101
3.1X105
8.4X106
Rb-83 (a)
 
2.0
5.4X101
2.0
5.4X101
6.8X102
1.8X104
Rb-84
 
1.0
2.7X101
1.0
2.7X101
1.8X103
4.7X104
Rb-86
 
5.0X10-1
1.4X101
5.0X10-1
1.4X101
3.0X103
8.1X104
Rb-87
 
Unlimited
Unlimited
Unlimited
Unlimited
3.2X10-9
8.6X10-8
Rb (nat)
 
Unlimited
Unlimited
Unlimited
Unlimited
6.7X106
1.8X108
Re-184
Rhenium (75)
1.0
2.7X101
1.0
2.7X101
6.9X102
1.9X104
Re-184m
 
3.0
8.1X101
1.0
2.7X101
1.6X102
4.3X103
Re-186
 
2.0
5.4X101
6.0X10-1
1.6X101
6.9X103
1.9X105
Re-187
 
Unlimited
Unlimited
Unlimited
Unlimited
1.4X10-9
3.8X10-8
Re-188
 
4.0X10-1
1.1X101
4.0X10-1
1.1X101
3.6X104
9.8X105
Re-189 (a)
 
3.0
8.1X101
6.0X10-1
1.6X101
2.5X104
6.8X105
Re (nat)
 
Unlimited
Unlimited
Unlimited
Unlimited
0.0
2.4X10-8
Rh-99
Rhodium (45)
2.0
5.4X101
2.0
5.4X101
3.0X103
8.2X104
Rh-101
 
4.0
1.1X102
3.0
8.1X101
4.1X101
1.1X103
Rh-102
 
5.0X10-1
1.4X101
5.0X10-1
1.4X101
4.5X101
1.2X103
Rh-102m
 
2.0
5.4X101
2.0
5.4X101
2.3X102
6.2X103
Rh-103m
 
4.0X101
1.1X103
4.0X101
1.1X103
1.2X106
3.3X107
Rh-105
 
1.0X101
2.7X102
8.0X10-1
2.2X101
3.1X104
8.4X105
Rn-222 (a)
Radon (86)
3.0X10-1
8.1
4.0X10-3
1.1X10-1
5.7X103
1.5X105
Ru-97
Ruthenium (44)
5.0
1.4X102
5.0
1.4X102
1.7X104
4.6X105
Ru-103 (a)
 
2.0
5.4X101
2.0
5.4X101
1.2X103
3.2X104
Ru-105
 
1.0
2.7X101
6.0X10-1
1.6X101
2.5X105
6.7X106
Ru-106 (a)
 
2.0X10-1
5.4
2.0X10-1
5.4
1.2X102
3.3X103
S-35
Sulphur (16)
4.0X101
1.1X103
3.0
8.1X101
1.6X103
4.3X104
Sb-122
Antimony (51)
4.0X10-1
1.1X101
4.0X10-1
1.1X101
1.5X104
4.0X105
Sb-124
 
6.0X10-1
1.6X101
6.0X10-1
1.6X101
6.5X102
1.7X104
Sb-125
 
2.0
5.4X101
1.0
2.7X101
3.9X101
1.0X103
Sb-126
 
4.0X10-1
1.1X101
4.0X10-1
1.1X101
3.1X103
8.4X104
Sc-44
Scandium (21)
5.0X10-1
1.4X101
5.0X10-1
1.4X101
6.7X105
1.8X107
Sc-46
 
5.0X10-1
1.4X101
5.0X10-1
1.4X101
1.3X103
3.4X104
Sc-47
 
1.0X101
2.7X102
7.0X10-1
1.9X101
3.1X104
8.3X105
Sc-48
 
3.0X10-1
8.1
3.0X10-1
8.1
5.5X104
1.5X106
Se-75
Selenium (34)
3.0
8.1X101
3.0
8.1X101
5.4X102
1.5X104
Se-79
 
4.0X101
1.1X103
2.0
5.4X101
2.6X10-3
7.0X10-2
Si-31
Silicon (14)
6.0X10-1
1.6X101
6.0X10-1
1.6X101
1.4X106
3.9X107
Si-32
 
4.0X101
1.1X103
5.0X10-1
1.4X101
3.9
1.1X102
Sm-145
Samarium (62)
1.0X101
2.7X102
1.0X101
2.7X102
9.8X101
2.6X103
Sm-147
 
Unlimited
Unlimited
Unlimited
Unlimited
8.5X10-1
2.3X10-8
Sm-151
 
4.0X101
1.1X103
1.0X101
2.7X102
9.7X10-1
2.6X101
Sm-153
 
9.0
2.4X102
6.0X10-1
1.6X101
1.6X104
4.4X105
Sn-113 (a)
Tin (50)
4.0
1.1X102
2.0
5.4X101
3.7X102
1.0X104
Sn-117m
 
7.0
1.9X102
4.0X10-1
1.1X101
3.0X103
8.2X104
Sn-119m
 
4.0X101
1.1X103
3.0X101
8.1X102
1.4X102
3.7X103
Sn-121m (a)
 
4.0X101
1.1X103
9.0X10-1
2.4X101
2.0
5.4X101
Sn-123
 
8.0X10-1
2.2X101
6.0X10-1
1.6X101
3.0X102
8.2X103
Sn-125
 
4.0X10-1
1.1X101
4.0X10-1
1.1X101
4.0X103
1.1X105
Sn-126 (a)
 
6.0X10-1
1.6X101
4.0X10-1
1.1X101
1.0X10-3
2.8X10-2
Sr-82 (a)
Strontium (38)
2.0X10-1
5.4
2.0X10-1
5.4
2.3X103
6.2X104
Sr-85
 
2.0
5.4X101
2.0
5.4X101
8.8X102
2.4X104
Sr-85m
 
5.0
1.4X102
5.0
1.4X102
1.2X106
3.3X107
Sr-87m
 
3.0
8.1X101
3.0
8.1X101
4.8X105
1.3X107
Sr-89
 
6.0X10-1
1.6X101
6.0X10-1
1.6X101
1.1X103
2.9X104
Sr-90 (a)
 
3.0X10-1
8.1
3.0X10-1
8.1
5.1
1.4X102
Sr-91 (a)
 
3.0X10-1
8.1
3.0X10-1
8.1
1.3X105
3.6X106
Sr-92 (a)
 
1.0
2.7X101
3.0X10-1
8.1
4.7X105
1.3X107
T(H-3)
Tritium (1)
4.0X101
1.1X103
4.0X101
1.1X103
3.6X102
9.7X103
Ta-178 (long-lived)
Tantalum (73)
1.0
2.7X101
8.0X10-1
2.2X101
4.2X106
1.1X108
Ta-179
 
3.0X101
8.1X102
3.0X101
8.1X102
4.1X101
1.1X103
Ta-182
 
9.0X10-1
2.4X101
5.0X10-1
1.4X101
2.3X102
6.2X103
Tb-157
Terbium (65)
4.0X101
1.1X103
4.0X101
1.1X103
5.6X10-1
1.5X101
Tb-158
 
1.0
2.7X101
1.0
2.7X101
5.6X10-1
1.5X101
Tb-160
 
1.0
2.7X101
6.0X10-1
1.6X101
4.2X102
1.1X104
Tc-95m (a)
Technetium (43)
2.0
5.4X101
2.0
5.4X101
8.3X102
2.2X104
Tc-96
 
4.0X10-1
1.1X101
4.0X10-1
1.1X101
1.2X104
3.2X105
Tc-96m (a)
 
4.0X10-1
1.1X101
4.0X10-1
1.1X101
1.4X106
3.8X107
Tc-97
 
Unlimited
Unlimited
Unlimited
Unlimited
5.2X10-5
1.4X10-3
Tc-97m
 
4.0X101
1.1X103
1.0
2.7X101
5.6X102
1.5X104
Tc-98
 
8.0X10-1
2.2X101
7.0X10-1
1.9X101
3.2X10-5
8.7X10-4
Tc-99
 
4.0X101
1.1X103
9.0X10-1
2.4X101
6.3X10-4
1.7X10-2
Tc-99m
 
1.0X101
2.7X102
4.0
1.1X102
1.9X105
5.3X106
Te-121
Tellurium (52)
2.0
5.4X101
2.0
5.4X101
2.4X103
6.4X104
Te-121m
 
5.0
1.4X102
3.0
8.1X101
2.6X102
7.0X103
Te-123m
 
8.0
2.2X102
1.0
2.7X101
3.3X102
8.9X103
Te-125m
 
2.0X101
5.4X102
9.0X10-1
2.4X101
6.7X102
1.8X104
Te-127
 
2.0X101
5.4X102
7.0X10-1
1.9X101
9.8X104
2.6X106
Te-127m (a)
 
2.0X101
5.4X102
5.0X10-1
1.4X101
3.5X102
9.4X103
Te-129
 
7.0X10-1
1.9X101
6.0X10-1
1.6X101
7.7X105
2.1X107
Te-129m (a)
 
8.0X10-1
2.2X101
4.0X10-1
1.1X101
1.1X103
3.0X104
Te-131m (a)
 
7.0X10-1
1.9X101
5.0X10-1
1.4X101
3.0X104
8.0X105
Te-132 (a)
 
5.0X10-1
1.4X101
4.0X10-1
1.1X101
1.1X104
3.0X105
Th-227
Thorium (90)
1.0X101
2.7X102
5.0X10-3
1.4X10-1
1.1X103
3.1X104
Th-228 (a)
 
5.0X10-1
1.4X101
1.0X10-3
2.7X10-2
3.0X101
8.2X102
Th-229
 
5.0
1.4X102
5.0X10-4
1.4X10-2
7.9X10-3
2.1X10-1
Th-230
 
1.0X101
2.7X102
1.0X10-3
2.7X10-2
7.6X10-4
2.1X10-2
Th-231
 
4.0X101
1.1X103
2.0X10-2
5.4X10-1
2.0X104
5.3X105
Th-232
 
Unlimited
Unlimited
Unlimited
Unlimited
4.0X10-9
1.1X10-7
Th-234 (a)
 
3.0X10-1
8.1
3.0X10-1
8.1
8.6X102
2.3X104
Th(nat)
 
Unlimited
Unlimited
Unlimited
Unlimited
8.1X10-9
2.2X10-7
Ti-44 (a)
Titanium (22)
5.0X10-1
1.4X101
4.0X10-1
1.1X101
6.4
1.7X102
Tl-200
Thallium (81)
9.0X10-1
2.4X101
9.0X10-1
2.4X101
2.2X104
6.0X105
Tl-201
 
1.0X101
2.7X102
4.0
1.1X102
7.9X103
2.1X105
Tl-202
 
2.0
5.4X101
2.0
5.4X101
2.0X103
5.3X104
Tl-204
 
1.0X101
2.7X102
7.0X10-1
1.9X101
1.7X101
4.6X102
Tm-167
Thulium (69)
7.0
1.9X102
8.0X10-1
2.2X101
3.1X103
8.5X104
Tm-170
 
3.0
8.1X101
6.0X10-1
1.6X101
2.2X102
6.0X103
Tm-171
 
4.0X101
1.1X103
4.0X101
1.1X103
4.0X101
1.1X103
U-230 (fast lung absorption) (a)(d)
Uranium (92)
4.0X101
1.1X103
1.0X10-1
2.7
1.0X103
2.7X104
U-230 (medium lung absorption) (a)(e)
 
4.0X101
1.1X103
4.0X10-3
1.1X10-1
1.0X103
2.7X104
U-230 (slow lung absorption) (a)(f)
 
3.0X101
8.1X102
3.0X10-3
8.1X10-2
1.0X103
2.7X104
U-232 (fast lung absorption) (d)
 
4.0X101
1.1X103
1.0X10-2
2.7X10-1
8.3X10-1
2.2X101
U-232 (medium lung absorption) (e)
 
4.0X101
1.1X103
7.0X10-3
1.9X10-1
8.3X10-1
2.2X101
U-232 (slow lung absorption) (f)
 
1.0X101
2.7X102
1.0X10-3
2.7X10-2
8.3X10-1
2.2X101
U-233 (fast lung absorption) (d)
 
4.0X101
1.1X103
9.0X10-2
2.4
3.6X10-4
9.7X10-3
U-233 (medium lung absorption) (e)
 
4.0X101
1.1X103
2.0X10-2
5.4X10-1
3.6X10-4
9.7X10-3
U-233 (slow lung absorption) (f)
 
4.0X101
1.1X103
6.0X10-3
1.6X10-1
3.6X10-4
9.7X10-3
U-234 (fast lung absorption) (d)
 
4.0X101
1.1X103
9.0X10-2
2.4
2.3X10-4
6.2X10-3
U-234 (medium lung absorption) (e)
 
4.0X101
1.1X103
2.0X10-2
5.4X10-1
2.3X10-4
6.2X10-3
U-234 (slow lung absorption) (f)
 
4.0X101
1.1X103
6.0X10-3
1.6X10-1
2.3X10-4
6.2X10-3
U-235 (all lung absorption types) (a), (d), (e), (f)
 
Unlimited
Unlimited
Unlimited
Unlimited
8.0X10-8
2.2X10-6
U-236 (fast lung absorption) (d)
 
Unlimited
Unlimited
Unlimited
Unlimited
2.4X10-6
6.5X10-5
U-236 (medium lung absorption) (e)
 
4.0X101
1.1X103
2.0X10-2
5.4X10-1
2.4X10-6
6.5X10-5
U-236 (slow lung absorption) (f)
 
4.0X101
1.1X103
6.0X10-3
1.6X10-1
2.4X10-6
6.5X10-5
U-238 (all lung absorption types) (d), (e), (f)
 
Unlimited
Unlimited
Unlimited
Unlimited
1.2X10-8
3.4X10-7
U (nat)
 
Unlimited
Unlimited
Unlimited
Unlimited
2.6X10-8
7.1X10-7
U (enriched to 20% or less) (g)
 
Unlimited
Unlimited
Unlimited
Unlimited
See Table A-4
See Table A-4
U (dep)
 
Unlimited
Unlimited
Unlimited
Unlimited
See Table A-4
See Table A-3
V-48
Vanadium (23)
4.0X10-1
1.1X101
4.0X10-1
1.1X101
6.3X103
1.7X105
V-49
 
4.0X101
1.1X103
4.0X101
1.1X103
3.0X102
8.1X103
W-178 (a)
Tungsten (74)
9.0
2.4X102
5.0
1.4X102
1.3X103
3.4X104
W-181
 
3.0X101
8.1X102
3.0X101
8.1X102
2.2X102
6.0X103
W-185
 
4.0X101
1.1X103
8.0X10-1
2.2X101
3.5X102
9.4X103
W-187
 
2.0
5.4X101
6.0X10-1
1.6X101
2.6X104
7.0X105
W-188 (a)
 
4.0X10-1
1.1X101
3.0X10-1
8.1
3.7X102
1.0X104
Xe-122 (a)
Xenon (54)
4.0X10-1
1.1X101
4.0X10-1
1.1X101
4.8X104
1.3X106
Xe-123
 
2.0
5.4X101
7.0X10-1
1.9X101
4.4X105
1.2X107
Xe-127
 
4.0
1.1X102
2.0
5.4X101
1.0X103
2.8X104
Xe-131m
 
4.0X101
1.1X103
4.0X101
1.1X103
3.1X103
8.4X104
Xe-133
 
2.0X101
5.4X102
1.0X101
2.7X102
6.9X103
1.9X105
Xe-135
 
3.0
8.1X101
2.0
5.4X101
9.5X104
2.6X106
Y-87 (a)
Yttrium (39)
1.0
2.7X101
1.0
2.7X101
1.7X104
4.5X105
Y-88
 
4.0X10-1
1.1X101
4.0X10-1
1.1X101
5.2X102
1.4X104
Y-90
 
3.0X10-1
8.1
3.0X10-1
8.1
2.0X104
5.4X105
Y-91
 
6.0X10-1
1.6X101
6.0X10-1
1.6X101
9.1X102
2.5X104
Y-91m
 
2.0
5.4X101
2.0
5.4X101
1.5X106
4.2X107
Y-92
 
2.0X10-1
5.4
2.0X10-1
5.4
3.6X105
9.6X106
Y-93
 
3.0X10-1
8.1
3.0X10-1
8.1
1.2X105
3.3X106
Yb-169
Ytterbium (70)
4.0
1.1X102
1.0
2.7X101
8.9X102
2.4X104
Yb-175
 
3.0X101
8.1X102
9.0X10-1
2.4X101
6.6X103
1.8X105
Zn-65
Zinc (30)
2.0
5.4X101
2.0
5.4X101
3.0X102
8.2X103
Zn-69
 
3.0
8.1X101
6.0X10-1
1.6X101
1.8X106
4.9X107
Zn-69m (a)
 
3.0
8.1X101
6.0X10-1
1.6X101
1.2X105
3.3X106
Zr-88
Zirconium (40)
3.0
8.1X101
3.0
8.1X101
6.6X102
1.8X104
Zr-93
 
Unlimited
Unlimited
Unlimited
Unlimited
9.3X10-5
2.5X10-3
Zr-95 (a)
 
2.0
5.4X101
8.0X10-1
2.2X101
7.9X102
2.1X104
Zr-97 (a)
 
4.0X10-1
1.1X101
4.0X10-1
1.1X101
7.1X104
1.9X106
(a)
A1or A2values include contributions from daughter nuclides with half-lives less than ten days, as listed in the following:
 
Mg-28
Al-28
 
Ca-47
Sc-47
 
Ti-44
Sc-44
 
Fe-52
Mn-52m
 
Fe-60
Co-60m
 
Zn-69m
Zn-69
 
Ge-68
Ga-68
 
Rb-83
Kr-83m
 
Sr-82
Rb-82
 
Sr-90
Y-90
 
Sr-91
Y-91m
 
Sr-92
Y-92
 
Y-87
Sr-87m
 
Zr-95
Nb-95m
 
Zr-97
Nb-97m, Nb-97
 
Mo-99
Tc-99m
 
Tc-95m
Tc-95
 
Tc-96m
Tc-96
 
Ru-103
Rh-103m
 
Ru-106
Rh-106
 
Pd-103
Rh-103m
 
Ag-108m
Ag-108
 
Ag-110m
Ag-110
 
Cd-115
In-115m
 
In-114m
In-114
 
Sn-113
In-113m
 
Sn-121m
Sn-121
 
Sn-126
Sb-126m
 
Te-127m
Te-127
 
Te-129m
Te-129
 
Te-131m
Te-131
 
Te-132
I-132
 
I-135
Xe-135m
 
Xe-122
I-122
 
Cs-137
Ba-137m
 
Ba-131
Cs-131
 
Ba-140
La-140
 
Ce-144
Pr-144m, Pr-144
 
Pm-148m
Pm-148
 
Gd-146
Eu-146
 
Dy-166
Ho-166
 
Hf-172
Lu-172
 
W-178
Ta-178
 
W-188
Re-188
 
Re-189
Os-189m
 
Os-194
Ir-194
 
Ir-189
Os-189m
 
Pt-188
Ir-188
 
Hg-194
Au-194
 
Hg-195m
Hg-195
 
Pb-210
Bi-210
 
Pb-212
Bi-212, Tl-208, Po-212
 
Bi-210m
Tl-206
 
Bi-212
Tl-208, Po-212
 
At-211
Po-211
 
Rn-222
Po-218, Pb-214, At-218, Bi-214, Po-214
 
Ra-223
Rn-219, Po-215, Pb-211, Bi-211, Po-211, Tl-207
 
Ra-224
Rn-220, Po-216, Pb-212, Bi-212, Tl-208, Po-212
 
Ra-225
Ac-225, Fr-221, At-217, Bi-213, Tl-209, Po-213, Pb-209
 
Ra-226
Rn-222, Po-218, Pb-214, At-218, Bi-214, Po-214
 
Ra-228
Ac-228
 
Ac-225
Fr-221, At-217, Bi-213, Tl-209, Po-213, Pb-209
 
Ac-227
Fr-223
 
Th-228
Ra-224, Rn-220, Po-216, Pb-212, Bi-212, Tl-208, Po-212
 
Th-234
Pa-234m, Pa-234
 
Pa-230
Ac-226, Th-226, Fr-222, Ra-222, Rn-218, Po-214
 
U-230
Th-226, Ra-222, Rn-218, Po-214
 
U-235
Th-231
 
Pu-241
U-237
 
Pu-244
U-240, Np-240m
 
Am-242m
Am-242, Np-238
 
Am-243
Np-239
 
Cm-247
Pu-243
 
Bk-249
Am-245
 
Cf-253
Cm-249
 
Am-243
Np-239
 
Cm-247
Pu-243
 
Bk-249
Am-245
 
Cf-253
Cm-249
(b)
The values of A1 and A2 in Curies (Ci) are approximate and for information only the regulatory standard units are terabecquerels (TBq).
(c)
The activity of IR-192 in special form may be determined from a measurement of the rate of decay or a measurement of the radiation level at a prescribed distance from the source.
(d)
These values apply only to compounds of uranium that take the chemical form of UF6, UO2F2 and UO2(NO3)2 in both normal and accident conditions of transport.
(e)
These values apply only to compounds of uranium that take the chemical form of UO3, UF4, UCI4 and hexavalent compounds in both normal and accident conditions of transport.
(f)
These values apply to all compounds of uranium other than those specified in notes (d) and (e) of this table.
(g)
These values apply to unirradiated uranium only.
(h)
A2 = 0.74 TBq (20 Ci) for Mo-99 for domestic use.
Table A-2.—Exempt Material Activity Concentrations and Exempt Consignment Activity Limits for Radionuclides
Symbol of radionuclide
Element and atomic number
Activity concentration for exempt material (Bq/g)
Activity concentration for exempt material (Ci/g)
Activity limit for exempt consignment (Bq)
Activity limit for exempt consignment (Ci)
Ac-225
Actinium (89)
1.0X101
2.7X10-10
1.0X104
2.7X10-7
Ac-227
-
1.0X10-1
2.7X10-12
1.0X103
2.7X10-8
Ac-228
-
1.0X101
2.7X10-10
1.0X106
2.7X10-5
Ag-105
Silver (47)
1.0X102
2.7X10-9
1.0X106
2.7X10-5
Ag-108m (b)
-
1.0X101
2.7X10-10
1.0X106
2.7X10-5
Ag-110m
-
1.0X101
2.7X10-10
1.0X106
2.7X10-5
Ag-111
-
1.0X103
2.7X10-8
1.0X106
2.7X10-5
Al-26
Aluminum (13)
1.0X101
2.7X10-10
1.0X105
2.7X10-6
Am-241
Americium (95)
1.0
2.7X10-11
1.0X104
2.7X10-7
Am-242m (b)
-
1.0
2.7X10-11
1.0X104
2.7X10-7
Am-243 (b)
-
1.0
2.7X10-11
1.0X103
2.7X10-8
Ar-37
Argon (18)
1.0X106
2.7X10-5
1.0X108
2.7X10-3
Ar-39
-
1.0X107
2.7X10-4
1.0X104
2.7X10-7
Ar-41
-
1.0X102
2.7X10-9
1.0X109
2.7X10-2
As-72
Arsenic (33)
1.0X101
2.7X10-10
1.0X105
2.7X10-6
As-73
-
1.0X103
2.7X10-8
1.0X107
2.7X10-4
As-74
-
1.0X101
2.7X10-10
1.0X106
2.7X10-5
As-76
-
1.0X102
2.7X10-9
1.0X105
2.7X10-6
As-77
-
1.0X103
2.7X10-8
1.0X106
2.7X10-5
At-211
Astatine (85)
1.0X103
2.7X10-8
1.0X107
2.7X10-4
Au-193
Gold (79)
1.0X102
2.7X10-9
1.0X107
2.7X10-4
Au-194
-
1.0X101
2.7X10-10
1.0X106
2.7X10-5
Au-195
-
1.0X102
2.7X10-9
1.0X107
2.7X10-4
Au-198
-
1.0X102
2.7X10-9
1.0X106
2.7X10-5
Au-199
-
1.0X102
2.7X10-9
1.0X106
2.7X10-5
Ba-131
Barium (56)
1.0X102
2.7X10-9
1.0X106
2.7X10-5
Ba-133
-
1.0X102
2.7X10-9
1.0X106
2.7X10-5
Ba-133m
-
1.0X102
2.7X10-9
1.0X106
2.7X10-5
Ba-140 (b)
-
1.0X101
2.7X10-10
1.0X105
2.7X10-6
Be-7
Beryllium (4)
1.0X103
2.7X10-8
1.0X107
2.7X10-4
Be-10
-
1.0X104
2.7X10-7
1.0X106
2.7X10-5
Bi-205
Bismuth (83)
1.0X101
2.7X10-10
1.0X106
2.7X10-5