APPENDIX C: Basic Quantities For Various Radioisotopes

Table 1

Table 2

Table 1 is a copy of Appendix C of "10 CFR Part 20" and applies to any radioisotopes used under a Nuclear Regulatory Commission license. Table 2 is a copy of the table found in paragraph 10.9 of the New Jersey Radiation Protection Code and applies to any naturally occurring or accelerator-produced radioisotopes used under a license issued by the State of New Jersey.

TABLE 1

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• Any alpha emitting radionuclide not listed above or mixtures of alpha emitters of unknown composition 0.001 m Ci.
• Any radionuclide other than alpha emitting radionuclides not listed above, or mixtures of beta emitters of unknown composition 0.01 m Ci.
  

  *The quantities listed above were derived by taking 1/10th of the most restrictive ALI listed in Table 1, columns 1 and 2, of appendix B to 10CFR20.1001 - 20.2401, rounding to the nearest factor of 10, and arbitrarily constraining the values listed between 0.001 and 1,000 m Ci. Values of 100 m Ci have been assigned for radionuclides having a radioactive half-life in excess of 109 years (except rheinium, 1000 m Ci) to take into account their low specific activity.

  NOTE: For purposes of 10CFR20.1902(e), 20.1905(a), and 20.2201(a) where there is involved a combination of radionuclides in known amounts, the limit for the combination should be derived as follows: determine, for each radionuclide in the combination, the ratio between the quantity present in the combination and the limit otherwise established for the specific radionuclide when not in combination. The sum of such ratios for all radionuclides in the combination may not exceed "1" (i.e., "unity").
  

TABLE 2

(This is a copy of the table found in paragraph 10.9 of the New Jersey Radiation Protection Code)


Material	Microcuries	Material	Microcuries
Ag-105	1	Ni-63	1
Ag-111	10	P-32	10
As-76	10	Pd-103 + Rh-103	50
As-77	10	Pd-109	10
Au-198	10	Pm-147	10
Au-199	10	Po-210	0.1
Ba-140 + La-140	1	Pr-143	10
Be-7	50	Pu-239	1
C-14	50	Ra-226	0.1
Ca-45	10	Rb-86	10
Cd-109 + Ag-109	10	Re-186	10
Ce-144 + Pr-144	1	Rh-105	10
Cl-36	1	Ru-106 + Rh-106	1
Co-60	1	S-35	50
Cr-51	50	Sb-124	1
Cs-137 + Ba-137	1	Sc-46	1
Cu-64	50	Sm-153	10
Eu-134	1	Sn-113	10
F-18	50	Sr-89	1
Fe-55	50	Sr-90 + Y-90	0.1
Fe-59	1	Ta-182	10
Ga-72	10	Tc-96	1
Ge-71	50	Tc-99	1
H-3(HTO or H32O)	250	Te-127	10
I-131	10	Te-129	1
In-114	1	Th (natural)	50

Ir-192	10	Tl-204	50
K-42	10	Tritium (See H-3)	250
Kr-85	5	U (natural)	50
La-140	10	U-233	1
Mn-52	1	U-234 + U-235	50
Mn-56	50	V-48	1
Mo-99	10	W-185	10
Na-22	10	Y-90	1
Na-24	10	Y-91	1
Nb-95	10	Zn-65	10
Ni-59	1	**	0.1

**Unidentified radioactive materials or any of the above in unknown mixtures


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