Hydrogen it is the lighter gas that exist in the planet ! So understanding this and taking advantage of this characteristic, we can make the hydrogen the most safety energy source of the planet as well.... The incident in Sandvike was 100% prevented, I have seen the equipment and are made with the most higher standards and quality material.... But the most stupid neglect could let that incident to happen.... I'm talking to confined areas !!!! For any reason any hydrogen devices, electrolyzers, tubes, valves, compressors or tanks... Can be in confined area !!!! Hydrogen Atom it is not only light but it is the smallest particle of all elements so it can filtrate even though the same walls that storage the 300 Bar... Small Hydrogen atoms will leak without any can see it or fill it.... Exactly same as bensin can go into our bloodstream after been converted to CO2 after the combustion and that is why we have the atmosphere collapse of this hydrocarbons pollution...!!!! Eventually Hydrogen filtration or leaks ARE NOT DANGERS if they are not confined in a closed area ! Lesson learned, every hydrogen tanks, Electrolyzers, compressors, valves, tube, etc... has to be open to the open, vented to the circundante air..... After all the Hydrogen innovators understand this, never never never we will see any incident where involve fire....
https://www.youtube.com/watch?v=Wfy8OdSbhsQ