Seems like it's easier to build a fireproof hydrogen design than get this right. Some of these proposed designs use an internal metal honeycomb for structural

Seems like it's easier to build a fireproof hydrogen design than get this right. Some of these proposed designs use an internal metal honeycomb for structural support, but an even lighter weight fireproof honeycomb could just prevent hydrogen leaks / oxygen mixing with honeycomb walls acting as "fire walls" and also reducing the extent of any leaks.