284 AFMAN 24-204(I)/TM 38-250/NAVSUP PUB 505/MCO P4030.19H/ DLAI 4145.3 11 DECEMBER 2001 Table A11.3.  Allowable Content of Uranium Hexafluoride (UF₆) "Heels" in a Specification 7A Cylinder. Maximum Cylinder Diameter Cylinder Volume Maximum Uranium 235 Enrich- ment (Weight %) Maximum "Heel" Weight Per Cylinder      ^UF6                      Uranium ²³⁵ Inches Centimeters Cubic Feet L kg (lb) kg (lb) 5 12.7 0.311 8.8 100.0 0.045 0.1 0.031 0.07 8 20.3 1.359 39 12.5 0.227 0.5 .019 0.04 12 30.5 2.410 68 5.0 0.454 1.0 .015 0.03 30 76 25.64 725 5.0 11.3 25 .383 0.84 48 122 108.9 3084 4.5 22.7 50 .690 1.52 (10 ton) 48 122 142.7 4041 4.5 22.7 50 .690 1.52 (14 ton) A11.8.1.8.  DOT 20PF-1, 20PF-2, 20PF-3 or 21PF-1A, 21PF-1B, or 21PF-2 phenolic-foam insulated overpacks with snug fitting inner metal cylinders meeting all of the applicable requirements of A3.1, A3.3.7.1, A3.3.7.2, A11.18 and the following: - Handling procedures and packaging criteria must comply with US Department of Energy Report Number ORO-651 or ANSI N14.1. - Quantities of uranium hexafluoride are authorized as shown in table A11.6, with each package assigned a minimum transport index as also shown. A11.8.2.  Package fissile radioactive materials with radioactive content over A₁ or A₂ in either: A11.8.2.1.  DOT 6L Metal Packaging. - Authorized only for uranium-235, plutonium-239, or plutonium-241, as metal oxide, or compounds that do not decompose at temperatures up to 149 degrees C (300 degrees F). - Radioactive decay heat output must not be more than 5 watts. - Radioactive  materials  in  normal  form  must  be  packaged  in  one  or  more  tightly-sealed  metal  cans  or polyethylene bottles within a DOT 2R containment vessel. - Authorized contents are limited per table A11.4: Table A11.4.  Authorized Contents in Kilograms (Kg) and Conditions for Specification 6L Packages. Uranium-235 Plutonium (Note 1) Minimum Fissile Transport Index Maximum Number of Packages Transported   as   a Fissile Material Control Shipment H/X<=3 (Note 2) 3 H/X<=10 H/X<=10 10<=H/X<=20        14       .... 3.6 (Note 3)      .... .... 2.5       ....      2.4      1.3      1.8                 80                 50 NOTES: 1. Plutonium solutions are not authorized. 2.    H/X  is  the  ratio  of  hydrogen  to  fissile  atoms  in  the  inner  containment  with  all  sources  of  hydrogen  in  the containment considered. 3.  Volume must not be over 3.6 liters.