tent of other fissile material is not more than 1 percent by weight of the total uranium-235 content; or

(iii) 500 grams of uranium-233 and uranium-235, if the atomic ratio of hydrogen to fissile material is greater than 5,200 and the content of plutonium is not more than 1 percent by weight of the total uranium-233 and uranium-235 content.

(5) A package containing less than 350 grams of fissile material, if there is not more than 5 grams of fissile material in any cubic foot within the package.

(b) Fissile radioactive materials containing not more than Type A quantities of radionuclides, in either normal form or special form, must be packaged in the packagings listed in § 146.19-100, subject to these conditions:

(1) Metal packaging DOT Specification 6L is authorized only for enriched uranium, the fissile content not to exceed 14 kilograms of uranium-235 as metal or oxide, or as compounds or alloys which will not decompose at temperatures up to 750° F. Each package shipped as Fissile Class II shall be assigned a transport index of 1.3 (unless external radiation levels require a higher assignment). The atomic ratio of hydrogen to uranium-235 shall not exceed three, all sources of hydrogen within the Specification 2R inner containment vessel being considered. The gross weight of the loaded package shall not exceed 350 pounds for the 55gallon size or 480 pounds for sizes up through 110 gallons.

(2) Metal packaging DOT Specification 6M is authorized only for contents named in paragraph (c) (2) of this section.

(3) Other packagings are authorized in § 146.19-100 only for not more than the following:

(i) 500 grams of uranium-235 as Fissile Class III, or not more than 40 grams of uranium-235 as Fissile Class II. For Fissile Class II shipments, the transport index to be assigned to each package shall be 0.4 for each gram of uranium235 above 15 grams up to a maximum of 40 grams (transport index of 10).

(ii) 320 grams of plutonium-239 as plutonium-beryllium neutron sources in

special form. Total radioactivity content must not exceed 20 curies. The transport index shall be 0.5 for each 20 grams, or fraction thereof, of fissile plutonium.

(c) Fissile radioactive materials containing Type B quantities of radionuclides in either normal form or special form, must be packaged as follows:

(1) DOT Specification 6L metal packaging. Authorized only for enriched uranium, the fissile content not to exceed 14 kilograms uranium-235 as metal or oxide, or as compounds or alloys which will not decompose at temperatures up to 750° F. Each package shipped as Fissile Class II shall be assigned a transport index of 1.3 (unless external radiation levels require a higher assignment). The atomic ratio of hydrogen to uranium-235 shall not exceed three, all sources of hydrogen within the Specification 2R inner containment vessel being considered. The gross weight of the loaded package shall not exceed 350 pounds for the 55gallon size or 480 pounds for sizes up through 110 gallons.

(2) DOT Specification 6M metal packaging. Authorized only for solid radioactive materials which will not decompose at temperatures up to 250° F. Radioactive thermal decay energy output shall not exceed 10 watts. Large quantity radioactive materials in normal form must be packaged in one or more sealed and leak-tight metal cans or polyethylene bottles within the Specification 2R containment vessel.

(1) Fissile Class I packages. The following quantities of fissile radioactive material are authorized for Fissile Class I packages: 1.6 kilograms uranium-235; 0.9 kilograms of plutonium (see note); 0.5 kilograms of uranium-233. The maximum ratio of hydrogen to fissile material must not exceed three, all sources of hydrogen within the Specification 2R containment vessel being considered.

NOTE: Because of the 10-watt thermal decay heat limitation, the limit for plutonium238 is only 0.02 kilograms.

(ii) Fissile Class II and III packages. Quantities of fissile radioactive material as shown in the following table are authorized for Fissile Class II and Fissile Class III packages. Where a maximum ratio of hydrogen to fissile material is

1 Quantity in kilograms.

(d) Petitions for authorization of nonspecification packagings for fissile radioactive materials must be submitted as prescribed in § 146.02-25, and must also include the following:

(1) Type and amount of fissile radioactive materials which are to be carried in each package, including:

(i) The transport index to be assigned to the package for the proposed package loading when shipped as Fissile Class II; and

(ii) The maximum number of packages proposed when shipped as Fissile Class III.

(2) A nuclear criticality safety evaluation demonstrating that the packaging design and limitation on its contents are adequate to ensure nuclear criticality safety. Any test performed in this respect should be described.

NOTE: In applying for authorization of packages for fissile radioactive materials to be used in shipments by the U.S. Atomic Energy Commission, or one of its contractors or licensees, a copy of the license amendment or other approval issued by that Commission will be accepted in place of the nuclear criticality safety evaluation and the package structural integrity evaluation.

(e) Mixing of packages of other types of radioactive materials, including Fissile Class I, with Fissile Class II packages is permitted if the total transport index in any one stowage location does not exceed 50.

(f) For Fissile Class II packages shipped under the exclusive use provisions of § 146.19-10(j) to provide for packages with high radiation dose rates, the transport index number which is calculated for nuclear criticality control purposes must not exceed 10 for any single package or a total of 50 for the full load, unless specifically authorized by the Commandant for Fissile Class III shipments.

(g) Fissile Class III shipments may be made only in accordance with procedures authorized by the Commandant. Such transport controls must provide nuclear criticality safety and shall be carried out by the shipper or carrier, as appropriate, to protect against loading, transporting, or stowing of that shipment together with other fissile material.

§ 146.19-14 Small quantities of radioactive materials and radioactive devices.

(a) Radioactive materials in normal form not exceeding 0.01 millicurie of

Group I radionuclides; 0.1 millicurie of Group II radionuclides; 1 millicurie of Groups III, IV, V, or VI radionuclides; 25 curies of Group VII radionuclides; tritium oxide in aqueous solution with a concentration not exceeding 0.5 millicuries per milliliter and with a total activity per package of not more than 3 curies; or 1 millicurie of radioactive material in special form; and not containing more than 15 grams of uranium235 are exempt from specification packaging, marking, and labeling, and are exempt from the provisions of § 146.19-10 if the following conditions are met:

(1) The materials are packaged in strong tight packages such that there will be no leakage of radioactive materials under conditions normally incident to transportation.

(2) The package must be such that the radiation dose rate at any point on the external surface of the package does not exceed 0.5 millirem per hour.

(3) There must be no significant removable radioactive surface contamination on the exterior of the package (see § 146.19-30).

(4) The outside of the inner container must bear the marking “Radioactive.”

(b) Manufactured articles such as instruments, clocks, electronic tubes or apparatus, or other similar devices, having radioactive materials (other than liquids) in a nondispersible form as a component part, are exempt from specification packaging, marking, and labeling, and are exempt from the provisions of § 146.19-10, if the following conditions are met:

NOTE 1: For radioactive gases, the requirement for the radioactive material to be in a nondispersible form does not apply.

(1) Radioactive materials are securely contained within the devices, or are securely packaged in strong, tight packages, so that there will be no leakage of radioactive materials incident to transportation.

(2) The radiation dose rate at four inches from any unpackaged device does not exceed 10 millirem per hour.

(3) The radiation dose rate at any point on the external surface of the out

(6) No package may contain more than 15 grams of fissile material.

(c) Manufactured articles, other than reactor fuel elements, in which the sole radioactive material is natural or depleted uranium, are exempt from specification packaging, marking, and labeling and are exempt from the provisions of § 146.19-10, if the following conditions are met:

(1) The radiation dose rate at any point on the external surface of the outside container does not exceed 0.5 millirem per hour;

(2) There must be no detectable radioactive surface contamination on the exterior of the package (see § 146.19-30).

(3) The total radioactivity content of each article must not exceed 3 curies. (4) The outer surface of the uranium is enclosed in an inactive metallic sheet. NOTE: Such articles may be packagings for the transportation of radioactive materials. § 146.19-16

terials.

Low specific activity ma

(a) Low specific activity materials when transported as other than a full

load are exempt from the provisions of § 146.19-10 (a) through (g); however, they must be packaged and stowed in accordance with the requirements of § 146.19-100, and must be marked and labeled as required in §§ 146.05-15(b) and 146.19-25.

(b) Low specific activity materials which are transported as a full load are exempt from specification packaging, marking, and labeling provided the shipments meet the requirements of paragraph (c) or (d) of this section.

(c) Packaged shipments of low specific activity materials transported as a full load must comply with the following:

(1) Materials must be packaged in strong, tight packages such that there will be no leakage of radioactive material under conditions normally incident to transportation.

(2) Packages must not have any significant removable surface contamination (see § 146.19-30).

(3) External radiation levels must comply with § 146.19-10(j).

(4) There must be no loose radioactive material in the car, vehicle, van, portable container, or hold.

(5) Shipment must be braced so as to prevent leakage or shift of lading under conditions normally incident to transportation.

(6) The outside of each outside package must be stencilled or otherwise marked "Radioactive-LSA."

(d) Unpackaged (bulk) shipments of low specific activity materials transported as a full load must comply with the following:

(1) Authorized materials are limited to the following:

(i) Uranium or thorium ores and physical or chemical concentrates of those ores;

(ii) Uranium metal or natural thorium metal, or alloys of these materials;

or

(iii) Materials of low radioactive concentration, if the average estimated

radioactivity concentration does not exceed 0.001 millicurie per gram and the contribution from Group I material does not exceed 1 percent of the total radioactivity.

(iv) Objects of non-radioactive materials externally contaminated with radioactive material, provided that the radioactive material is not readily dispersible and the surface contamination, when averaged over 1 square meter, does not exceed 0.0001 millicurie per square centimeter of Group I radionuclides or 0.001 millicurie per square centimeter of other radionuclides. Such objects must be suitably wrapped or enclosed.

(2) External radiation levels must comply with subparagraphs (2) and (3) of § 146.19-10(j).

§ 146.19-18 Radioactive normal form.

material in

(a) Radioactive materials in normal form in Type A and Type B quantities must be packaged in authorized packagings as listed in § 146.19-100.

(b) Large quantities of radioactive materials in normal form must be packaged in packaging authorized in § 146.19100 or in Type B packaging which meets the standards prescribed in the regulations of the U.S. Atomic Energy Commission (10 CFR Part 71) or the 1967 regulations of the International Atomic Energy Agency, and which has been specifically authorized for such use by the Commandant under § 146.02-25. In applying for the Commandant's authorization of packages for large quantities of radioactive materials to be used in shipments by the U.S. Atomic Energy Commission or its contractors or licensees, a copy of the license amendment or other approval issued by that Commission will be accepted in place of the package structural integrity evaluation.

§ 146.19-20 Radioactive material in special form.

(a) Radioactive materials in special form in Type A and Type B quantities must be packaged in authorized packagings as listed in § 146.19-100.

(b) Large quantities of radioactive materials in special form must be packaged in packaging authorized in § 146.10-100 or in Type B packaging which meets the standards in the regulations of the U.S. Atomic Energy Commission (10 CFR Part 71), or the 1967 regulations of the International Atomic Energy Agency, and which has been specifically authorized for such use by the Commandant under § 146.02-25. In applying for the Commandant's authorization of packages for large quantities of radioactive materials to be used in shipments by the U.S. Atomic Energy Commission or its contractors or licensees, a copy of the license amendment or other approval issued by that Commission will be accepted in place of the package structural integrity evaluation.

§ 146.19-25 Labeling of packages of radioactive materials.

(a) Each package of radioactive materials, unless exempted by § 146.19-14 or § 146.19-16, shall be labeled as provided in this section (see § 146.05-17 for description of labels). The label to be used shall be determined by the transport index or other considerations as follows:

(1) Radioactive white-I label. Each package not exceeding 0.5 millirem per hour at any point on the external surface of the package, and which does not come within the provisions of subparagraph (2) or (3) of this paragraph. Not authorized for Fissile Class II packages.

(2) Radioactive yellow-II label. When the limit in subparagraph (1) of this paragraph is exceeded but the provisions of subparagraph (3) of this paragraph are not met; and—

(i) Each package not exceeding 10 millirem per hour at any point on the external surface of the package and not exceeding 0.5 millirem per hour at 3 feet from the external surface of the package;

or

(11) Each package for which the transport index does not exceed 0.5 at any time during transportation.

(3) Radioactive yellow-III label. When either of the limits in subparagraph (2) of this paragraph is exceeded. In addition, the following types of packages must also bear this label:

(1) Each Fissile Class III package; (ii) Each package containing a large quantity of radioactive material as defined in §146.19-1; or

(iii) Each package being transported under a permit issued as authorized in § 146.02-25.

(b) Radioactive materials having other hazardous characteristics, as defined elsewhere in this part must also be labeled with other labels as required by this part according to the hazards of the commodity (see § 146.05-15). For example:

(1) Packages containing the solid nitrates of uranium or thorium must bear both a "radioactive" label and a "yellow" oxidizing materials label.

(2) Packages containing nitric acid solutions of radioactive materials must bear both a "radioactive" label and a "white" corrosive acid label.

(a) Special form material: To qualify as special form material, the radioactive material must either have no overall dimension less than 0.5 millimeter, or must have at least one dimension greater than 5 millimeters. Each item, or the capsule material, must not dissolve or convert into dispersible form to the extent of more than 0.005 percent, by weight, by immersion for 1 week in water at pH 6-8 and 68° F., and a maximum conductivity of 10 micromhos/centimeter, and by immersion in air at 86° F. If in massive solid form, the radioactive material must not break, crumble, or shatter if subjected to the percussion test prescribed in this section, and must not melt, sublime, or ignite at temperatures below 1,000° F. If encapsulated, the capsule must retain its contents when subjected to all of the performance tests prescribed in this section, and must not