AFMAN 24-204(I)/TM 38-250/NAVSUP PUB 505/MCO P4030.19H/ DLAI 4145.3 299 11 DECEMBER 2001 Symbol of Radionuclide Element and Atomic Number ^A1^(TBq) (Special form) ^A2^(TBq) (Other form) Activity concentration for exempt material Activity limit for an exempt consignment Xe-123 2 0.7 1 x 10² 1 x 10⁹ Xe-127 4 2 1 x 10³ 1 x 10⁵ Xe-131m 40 40 1 x 10⁴ 1 x 10⁴ Xe-133 20 10 1 x 10³ 1 x 10⁴ Xe-135 3 2 1 x 10³ 1 x 10¹⁰ Y-87 a Yttrium (39) 1 1 1 x 10¹ 1 x 10⁶ Y-88 0.4 0.4 1 x 10¹ 1 x 10⁶ Y-90 0.3 0.3 1 x 10³ 1 x 10⁵ Y-91 2 2 1 x 10² 1 x 10⁶ Y-91m 0.6 0.6 1 x 10³ 1 x 10⁶ Y-92 0.2 0.2 1 x 10² 1 x 10⁵ Y-93 0.3 0.3 1 x 10² 1 x 10⁵ Yb-169 Ytterbium (70) 4 1 1 x 10² 1 x 10⁷ Yb-175 30 0.9 1 x 10³ 1 x 10⁷ Zn-65 Zinc (30) 2 2 1 x 10¹ 1 x 10⁶ Zn-69 3 0.6 1 x 10² 1 x 10⁶ Zn-69m 3 0.6 1 x 10⁴ 1 x 10⁶ Zr-88 Zirconium (40) 3 3 1 x 10² 1 x 10⁶ Zr-93 Unlimited Unlimited 1 x 10^3b 1 x 10^7b Zr-95^a 2 0.8 1 x 10¹ 1 x 10⁶ Zr-97 a 0.4 0.4 1 x 10^1b 1 x 10^5b Notes: a   A’ and/or A² values include contributions from daughter nuclides with half-lives less than 10 days. b   Parent nuclides and their progeny included in secular equilibium are listed in the following: Sr-90 - Y-90 Zr-93 - Nb-93m Zr-97 - Nb-97 Ru-106 - Rh-106 Cs-137 - Ba-137m Ce-134 - La-134 Ce-144 - Pa-144 Ba-140- La-140 Bi-212 -Ta-208 (0.36), Po-212 (0.64) Pb-21 - Bi-210, Po-210 Pb-212 - Bi-212, Ti-208 (0.36), Po-212 (0.64) Rn-220 - Po-216 Rn-222 - Po-21 8, Pb-214, Bi-214, Po-214 Ra-223 - Rn-219, Po-215, Pb-211, Bi-211, Tl-207 Ra-224 - Rn-220, Po-216, Pb-212, Bi-212, Tl-208 (0.36), Po-212 (0.64) Ra-226 - Rn-222, Po-218, Pb-214, Bi-214, Po-214, Pb-210, Bi-210, Po-210 Ra-228 - Ac-228 Th-226 - Ra-222, Rn-218, Po-214 Th-228 - Ra-224, Rn-220, Po-216, Pb-212, Bi-212, Tl-208 (0.36), Po-212 (0.64) Th-229 - Ra-225, Ac-225, Fr-221, At-217, Bi-213, Po-213, Pb-209 Th-nat - Ra-228, Ac-228, Th-228, Ra-224, Rn-220, Po-216, Pb-212, Bi-212, Tl-208 (0.36),  Po212 (0.64) Th-234 -    Pa-234m U-230 - Th-226, Ra-222, Rn-218, Po-214 U-232 - Th-228, Ra-224, Rn-220, Po-216, Pb-212, Bi-212, Tl-208 (0.36), Po-212 (0.64) U-235 - Th-231