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| DOE-STD-1098-99
Radiological Control
Radioactive Materials
June 2004
Appendix 4A
Values for Establishing Sealed Radioactive Source Accountability and
Radioactive Material Posting and Labeling Requirements
Nuclide
Activity(Ci)
Nuclide
Activity(Ci)
Nuclide
Activity(Ci)
Ac-227
1.5E+00
Cl-36
4.6E+05
Ge-68
5.7E+02
Ag-105
2.1E+06
Cm-241
6.8E+04
H-3
1.6E+08
Ag-108m
1.8E+01
Cm-242
5.8E+02
Hf-172
3.1E+04
Ag-110m
2.2E+01
Cm-243
3.3E+01
Hf-175
1.8E+06
Al-26
1.6E+01
Cm-244
4.0E+01
Hf-178m
4.1E+03
Am-241
2.3E+01
Cm-245
2.2E+01
Hf-181
3.5E+02
Am-242m
2.4E+01
Cm-246
2.2E+01
Hf-182
3.0E+03
Am-243
2.3E+01
Cm-247
2.4E+01
Hg-194
3.5E+04
As-73
5.4E+02
Cm-248
6.0E+00
Hg-203
4.9E+02
Au-195
4.8E+02
Cm-250
1.1E+00
Ho-166m
2.2E+01
Ba-133
5.2E+01
Co-56
4.0E+01
I-125
3.5E+02
Be-10
2.8E+04
Co-57
2.3E+02
I-129
1.8E+02
Be-7
3.2E+03
Co-58
1.4E+02
In-114m
7.8E+02
Bi-207
1.7E+01
Co-60
1.8E+01
Ir-192
1.4E+02
Bi-208
1.5E+01
Cs-134
2.7E+01
Ir-192m
2.6E+04
Bi-210m
1.3E+03
Cs-135
2.2E+06
Ir-194m
2.7E+01
Bk-247
1.7E+01
Cs-137
6.0E+01
K-40
2.8E+02
Bk-249
7.2E+03
Dy-159
4.1E+06
La-137
1.1E+05
C-14
4.8E+06
Es-254
6.3E+01
Lu-173
4.4E+05
Ca-41
7.4E+06
Es-255
4.6E+04
Lu-174
2.5E+05
Ca-45
1.5E+06
Eu-148
7.0E+05
Lu-174m
3.9E+05
Cd-109
1.6E+02
Eu-149
5.3E+06
Lu-177m
5.8E+01
Cd-113m
6.5E+03
Eu-152
3.1E+01
Md-258
6.0E+02
Cd-115m
1.0E+04
Eu-154
3.1E+01
Mn-53
2.0E+07
Ce-139
2.4E+02
Eu-155
3.7E+02
Mn-54
6.5E+01
Ce-141
2.4E+03
Fe-55
3.7E+06
Mo-93
7.7E+01
Ce-144
1.5E+03
Fe-59
2.0E+02
Na-22
1.9E+01
Cf-248
2.0E+02
Fe-60
1.3E+04
Nb-91
7.0E+01
Cf-249
1.7E+01
Fm-257
4.3E+02
Nb-91m
3.6E+02
Cf-250
3.8E+01
Gd-146
2.6E+05
Nb-92
1.8E+01
Cf-251
1.7E+01
Gd-148
3.0E+01
Nb-93m
4.4E+02
Cf-252
6.4E+01
Gd-151
1.1E+06
Nb-94
2.3E+01
Cf-254
3.4E+01
Gd-153
2.1E+02
Nb-95
3.4E+02
Ni-59
7.5E+06
Re-184
2.6E+02
Tc-97m
3.6E+02
4-19
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