Abstract: On the basis of IAEA, ISO, U.S. and China's requirements for UF₆ transport package, insufficiency of related standards in China is analyzed. From the perspective of design, comparisons of U.S. cylinder 30B, 48X and China cylinder 740 L, 3 m³ are conducted. An introduction to several models for UF₆ release accident consequence assessment is given, which include those used in early year, and more advanced HGSYSTEM/UF₆, RASCAL4.On account of experimental data, a comparison of the latter two models is carried through. It turns out that, for HGSYSTEM/UF₆, the predictions are accurate within 200 m, and smaller than measured values within 500 m. For RASCAL4, errorsare obvious within 20 m, and the predictions are smaller than measured values exceed 100 m.

Key words: UF₆, Package, Requirements, Release accident models