[en] The DN30 package was developed by Daher Nuclear Technologies GmbH (DNT) for the transport of enriched commercial grade and reprocessed UF₆ up to an enrichment of 5 %. It consists of a standard 30B cylinder and the DN30 Protective Structural Packaging (PSP) and is licensed as a type AF, IF and B(U)F package. Due to its chemical and physical properties, enriched UF₆ presents several challenges to criticality safety that have to be taken into account for the safety assessment of the DN30 package. The assessment is based on variation calculations of criticality relevant parameters such as geometry and material composition for individual packages in isolation and arrays of packages. Single packages and infinite 3D arrays of packages were simulated to figure out most reactive arrangements and prove criticality safety. Since UF₆ in 30B cylinders is under-moderated, the consideration of conservative amounts of moderation and the impact of their geometrical distribution on reactivity are of paramount importance. This involves the determination of all possible moderation sources, not only those resulting from inherent impurities in UF₆, but also from the interaction of the UF₆ content with in-leaking water vapor. Regarding impurities, the criticality analysis assumes up to 0.5 wt.% HF, and also takes new findings about hydrogenated uranium residues into account. Based on these potential quantities of moderation, the criticality analysis is performed for a variety of geometrical fuel/moderator distributions by means of conservative calculation models, incorporating accident conditions of transport and effects related to the physical properties of UF₆. Criticality safety was proven for the DN30 package even for very conservative, hypothetical assumptions that are unlikely to be encountered in actual packaging, transportation, and storage configurations. In addition to the overview of the criticality analysis for the newly licensed DN30 package, an outlook on potential design optimizations for higher uranium enrichments will also be presented. (authors)