AFMAN 24-204(I)/TM 38-250/NAVSUP PUB 505/MCO P4030.19H/ DLAI 4145.3 283 11 DECEMBER 2001 A11.8.1.5.    Any  other  Type  A,  Type  B,  Type  B(U),  or  Type  B(M)  packaging  that  also  meets  the  applicable requirements  for  fissile  material  packaging  in  section  V  of  the  IAEA  "Regulations  for  the  Safe  Transport  of Radioactive Materials, Safety Series No. 6," or IAEA "Regulations for the Safe Transport of Radioactive Materials, No. TS-R-1” and for which the foreign competent authority certificate has been revalidated by the DOT according to 49 CFR 173.473.  Authorized only for export and import shipments. A11.8.1.6.  A 208 L (55 gallon) steel drum (1A2), subject to the following conditions: - Packaging must meet the PG I performance requirements. - The quantity may not exceed 350 grams of uranium 235 in any nonpyrophoric form, enriched to any degree in the uranium 235 isotope. - Each drum must have a minimum 18-gauge body and bottom head and 16-gauge removable top head with one or more corrugations in the cover near the periphery. - Closures must conform to 49 CFR 178.352. - At least four equally spaced 12 mm (0.5 inch) diameter vent  holes must  be  provided  on the  sides  of  the drum near the top, each covered with weatherproof tape or equivalent device. - Appropriate primary inner containment of the contents and sufficient packaging material, such as plastic or metal jars or cans, must be provided so that DOT 7A provisions are satisfied by the inner packaging. - Each inner container must be capable of venting if subjected to the thermal test described in 10 CFR Part 71. - Liquid contents must be packaged per 49 CFR 173.412. - The maximum weight of contents including internal packaging must not be over 91 kgs (200 pounds) with fissile material content limited as shown in table A11.2: A11.8.1.7.  Any metal cylinder that meets the performance requirements of A11.6 and 49 CFR 178.350 for DOT 7A Type A packaging may be used for the transport of residual "heels" of enriched solid uranium hexafluoride without a protective overpack per table A11.3: Table A11.2.  Fissile Material Content and Transport Index for UN 1A2 Package. Maximum    U-235    per Package (grams) MinimumTransport Index  per Package as Fissile Class II Maximum    Number    of    Packages Transported  as  a  Fissile  Material Controlled Shipment 350 1.8 72 300 1.0 129 250 0.5 256 200 0.3 500 150 0.1 500 100 0.1 500   50 Note 1 Note 2 NOTES: 1. Transport index is limited by the external radiation levels. 2.  Maximum number is limited by the total transport index.