10 C.F.R. Appendix E to Part 835—Values for Establishing Sealed Radioactive Source Accountability and Radioactive Material Posting and Labeling Requirements
Title 10 - Energy
The data presented in this appendix E are to be used for identifying accountable sealed radioactive sources as defined at §835.2(a), establishing the need for radioactive material area posting in accordance with §835.603(g), and establishing the need for radioactive material labeling in accordance with §835.605. Note: The data are listed in alphabetical order by nuclide. Any alpha emitting radionuclide not listed above and mixtures of alpha emitters of unknown composition have a value of 10 microcuries. Any radionuclide other than alpha emitting radionuclides not listed above and mixtures of beta emitters of unknown composition have a value of 100 microcuries. Note: Where there is involved a combination of radionuclides in known amounts, derive the value for the combination as follows: determine, for each radionuclide in the combination, the ratio between the quantity present in the combination and the value otherwise established for the specific radionuclide when not in combination. If the sum of such ratios for all radionuclides in the combination exceeds unity (1), then the accountability criterion has been exceeded. [63 FR 59688, Nov. 4, 1998]
Title 10: Energy
PART 835—OCCUPATIONAL RADIATION PROTECTION
Subpart N—Emergency Exposure Situations
Appendix E to Part 835—Values for Establishing Sealed Radioactive Source Accountability and Radioactive Material Posting and Labeling Requirements
---------------------------------------------------------------------------------------------------------------- Activity Activity Activity Nuclide (µCi) Nuclide (µCi) Nuclide (µCi)----------------------------------------------------------------------------------------------------------------Ac-227.......................... 1.5E+00 H-3................ 1.6E+08 Re-184m........... 1.5E+02Ag-105.......................... 2.1E+06 Hf-172............. 3.1E+04 Re-186m........... 2.8E+05Ag-108m......................... 1.8E+01 Hf-175............. 1.8E+06 Rh-101............ 2.5E+05Ag-110m......................... 2.2E+01 Hf-178m............ 4.1E+03 Rh-102............ 8.3E+04Al-26........................... 1.6E+01 Hf-181............. 3.5E+02 Rh-102m........... 2.1E+05Am-241.......................... 2.3E+01 Hf-182............. 3.0E+03 Ru-103............ 4.4E+02Am-242m......................... 2.4E+01 Hg-194............. 3.5E+04 Ru-106............ 2.1E+04Am-243.......................... 2.3E+01 Hg-203............. 4.9E+02 S-35.............. 4.0E+06As-73........................... 5.4E+02 Ho-166m............ 2.2E+01 Sb-124............ 9.1E+01Au-195.......................... 4.8E+02 I-125.............. 3.5E+02 Sb-125............ 6.8E+01Ba-133.......................... 5.2E+01 I-129.............. 1.8E+02 Sc-46............. 6.2E+01Be-10........................... 2.8E+04 In-114m............ 7.8E+02 Se-75............. 6.4E+01Be-7............................ 3.2E+03 Ir-192............. 1.4E+02 Se-79............. 1.0E+06Bi-207.......................... 1.7E+01 Ir-192m............ 2.6E+04 Si-32............. 9.9E+03Bi-208.......................... 1.5E+01 Ir-194m............ 2.7E+01 Sm-145............ 9.1E+05Bi-210m......................... 1.3E+03 K-40............... 2.8E+02 Sm-146............ 1.2E+02Bk-247.......................... 1.7E+01 La-137............. 1.1E+05 Sm-151............ 2.5E+05Bk-249.......................... 7.2E+03 Lu-173............. 4.4E+05 Sn-113............ 3.1E+02C-14............................ 4.8E+06 Lu-174............. 2.5E+05 Sn-119m........... 3.3E+02Ca-41........................... 7.4E+06 Lu-174m............ 3.9E+05 Sn-121m........... 8.7E+05Ca-45........................... 1.5E+06 Lu-177m............ 5.8E+01 Sn-123............ 1.3E+04Cd-109.......................... 1.6E+02 Md-258............. 6.0E+02 Sn-126............ 1.8E+02Cd-113m......................... 6.5E+03 Mn-53.............. 2.0E+07 Sr-85............. 1.2E+02Cd-115m......................... 1.0E+04 Mn-54.............. 6.5E+01 Sr-89............. 2.4E+05Ce-139.......................... 2.4E+02 Mo-93.............. 7.7E+01 Sr-90............. 7.7E+03Ce-141.......................... 2.4E+03 Na-22.............. 1.9E+01 Ta-179............ 1.5E+06Ce-144.......................... 1.5E+03 Nb-91.............. 7.0E+01 Ta-182............ 7.3E+01Cf-248.......................... 2.0E+02 Nb-91m............. 3.6E+02 Tb-157............ 2.5E+03Cf-249.......................... 1.7E+01 Nb-92.............. 1.8E+01 Tb-158............ 3.9E+04Cf-250.......................... 3.8E+01 Nb-93m............. 4.4E+02 Tb-160............ 1.2E+02Cf-251.......................... 1.7E+01 Nb-94.............. 2.3E+01 Tc-95m............ 1.3E+02Cf-252.......................... 6.4E+01 Nb-95.............. 3.4E+02 Tc-97............. 8.1E+01Cf-254.......................... 3.4E+01 Ni-59.............. 7.5E+06 Tc-97m............ 3.6E+02Cl-36........................... 4.6E+05 Ni-63.............. 3.2E+06 Tc-98............. 2.5E+01Cm-241.......................... 6.8E+04 Np-235............. 1.2E+02 Tc-99............. 6.8E+06Cm-242.......................... 5.8E+02 Np-236............. 2.2E+01 Te-121m........... 1.9E+02Cm-243.......................... 3.3E+01 Np-237............. 1.9E+01 Te-123m........... 2.8E+02Cm-244.......................... 4.0E+01 Os-185............. 1.4E+02 Te-125m........... 4.4E+02Cm-245.......................... 2.2E+01 Os-194............. 1.5E+04 Te-127m........... 8.0E+02Cm-246.......................... 2.2E+01 Pa-231............. 7.8E+00 Te-129m........... 2.3E+03Cm-247.......................... 2.4E+01 Pb-202............. 1.0E+05 Th-228............ 2.9E+01Cm-248.......................... 6.0E+00 Pb-205............. 9.1E+01 Th-229............ 4.7E+00Cm-250.......................... 1.1E+00 Pb-210............. 9.2E+01 Th-230............ 3.1E+01Co-56........................... 4.0E+01 Pd-107............. 7.8E+05 Th-232............ 6.1E+00Co-57........................... 2.3E+02 Pm-143............. 1.3E+02 Ti-44............. 1.6E+02Co-58........................... 1.4E+02 Pm-144............. 2.9E+01 Tl-204............ 2.2E+04Co-60........................... 1.8E+01 Pm-145............. 2.6E+02 Tm-170............ 8.4E+03Cs-134.......................... 2.7E+01 Pm-146............. 4.5E+01 Tm-171............ 2.8E+04Cs-135.......................... 2.2E+06 Pm-147............. 2.5E+05 U-232............. 1.5E+01Cs-137.......................... 6.0E+01 Pm-148m............ 1.1E+02 U-233............. 7.4E+01Dy-159.......................... 4.1E+06 Po-209............. 6.3E+03 U-234............. 7.5E+01Es-254.......................... 6.3E+01 Po-210............. 1.1E+03 U-235............. 6.7E+01Es-255.......................... 4.6E+04 Pt-193............. 4.4E+07 U-236............. 8.0E+01Eu-148.......................... 7.0E+05 Pu-236............. 6.9E+01 U-238............. 8.4E+01Eu-149.......................... 5.3E+06 Pu-237............. 3.3E+02 V-49.............. 2.9E+07Eu-152.......................... 3.1E+01 Pu-238............. 2.5E+01 W-181............. 1.1E+03Eu-154.......................... 3.1E+01 Pu-239............. 2.3E+01 W-185............. 3.9E+06Eu-155.......................... 3.7E+02 Pu-240............. 2.3E+01 W-188............. 6.4E+04Fe-55........................... 3.7E+06 Pu-241............. 1.2E+03 Y-88.............. 3.4E+01Fe-59........................... 2.0E+02 Pu-242............. 2.4E+01 Y-91.............. 5.0E+04Fe-60........................... 1.3E+04 Pu-244............. 2.5E+01 Yb-169............ 5.5E+02Fm-257.......................... 4.3E+02 Ra-226............. 1.2E+03 Zn-65............. 1.1E+02Gd-146.......................... 2.6E+05 Ra-228............. 2.1E+03 Zr-88............. 1.2E+02Gd-148.......................... 3.0E+01 Rb-83.............. 9.2E+01 Zr-93............. 3.1E+04Gd-151.......................... 1.1E+06 Rb-84.............. 2.0E+02 Zr-95............. 2.0E+02Gd-153.......................... 2.1E+02 Re-183............. 5.4E+02Ge-68........................... 5.7E+02 Re-184............. 2.6E+02----------------------------------------------------------------------------------------------------------------
