Appendix C (Chapter 21)
LOW ACTIVITY SOURCE (LAS) AUTHORIZATION LIMITS

Low Activity Source Authorization

Less than 10 µCi (3.7 x 105 Bq), exception H-3 less than 100 Ci (3.7 x 106 Bq)
Be-7 S-35 Ca-41 Ca-45 V-49 Mn-53 Fe-55  
Ni-59 Ni-63 As-73 Se-79 Rb-87 Tc-99 Pd-107  
Cd-113 In-115 Te-123 Cs-135 Ce-141 Gd-152 Tb-157  
Tm-171 Ta-180 W-181 W-185 W-188 Re-187 Tl-204  
 
Less than 1 µCi (3.7 x 104 Bq)
C-14 P-32 P-33 Cl-36 K-40 Fe-59 Co-57 Ga-67
Se-75 Rb-84 Sr-85 Sr-89 Y-91 Zr-95 Nb-93m Nb-95
Tc-99m Ru-103 Ag-105 In-114m Sn-113 Sn-119m Sn-121m Sn-123
Te-123m Te-125m Te-127m Te-129m I-125 La-137 Ce-139 Pm-143
Pm-145 Pm-147 Sm-145 Sm-151 Eu-149 Eu-155 Gd-151 Gd-153
Dy-159 Tm-170 Yb-169 Lu-173 Lu-174 Lu-174m Hf-175 Hf-181
Ta-179 Re-184 Re-186m Ir-192 Pt-193 Au-195 Hg-203 Pb-205
Np-235 Pu-237            
 
Less than 100 nCi (3.7 x 103 Bq)
Be-10 Na-22 Al-26 Si-32 Sc-46 Ti-44 Mn-54 Fe-60
Co-56 Co-58 Co-60 Zn-65 Ge-68 Ge-69 Rb-83 Y-88
Zr-88 Zr-93 Nb-94 Mo-93 Tc-95m Tc-97 Tc-98 Ru-106
Rh-101 Rh-102 Rh-102m Ag-108m Ag-110m Cd-109 Sn-126 Sb-124
Sb-125 Te-121m I-129 Cs-134 Cs-137 Ba-133 Ce-144 Pm-144
Pm-146 Pm-148m Eu-148 Eu-150 Eu-152 Eu-154 Gd-146 Tb-158
Tb-160 Ho-166m Lu-176 Lu-177 Hf-172 Ta-182 Re-184m Os-185
Os-194 Ir-192m Ir-194m Hg-194 Pb-202 Bi-207 Bi-210m Cm-241
 
Less than 10 nCi (3.7 x 102 Bq)
Sr-90 Cd-113m La-138 Hf-178m Hf-182 Po-210 Ra-226 Ra-228
Bk-249 Es-254            
 
Less than 1 nCi (3.7 x 101 Bq)
Sm-146 Sm-147 Pb-210 Pu-241 Cm-242 Cf-248 Fm-257 Md-258
 
Less than 0.1 nCi (3.7 Bq)
Gd-148 Ac-227 Th-228 Th-229 Th-230 Th-232    
U-232 U-233 U-234 U-235 U-236 Pa-231 U-238* Np-236
Np-237 Pu-236 Pu-238 Pu-239 Pu-240 Pu-242 Pu-244 Am-241
Am-242m Am-243 Cm-243 Cm-244 Cm-245 Cm-246 Cm-247 Cm-248
Cm-249 Cm-250 Bk-247 Cf-249 Cf-250 Cf-251 Cf-252 Cf-254
 

Any alpha emitting radionuclide not listed above — less than 0.1 nCi (37 Bq)
* Contact OHP for U-238 nitrate/acetate limits.

 


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