Storing liquid hydrogen takes less space than when it is in its normal state. It should be confined in a pressurized and thermally insulated container. It is challenging to maintain a low temperature, even in thermally insulated containers. If the temperature is not kept below its critical point, the hydrogen will seep out. Its gradual evaporation rate is 1 percent per day. This may lead to mixture with other gases, possibly causing fires.
Liquid hydrogen is dreaded for its intensive explosions. When ignited with other gases, a big explosion may occur. An invisible spark can trigger the ignition. Hydrogen flames are unnoticeable and it is difficult to stop the fire from spreading once it starts. You can only detect it from its odor.
To prevent accidents, you must ensure that the liquid hydrogen is stored in a pressurized and thermally insulated container. It should be kept in a safe place. If your building has liquid hydrogen stored, you should provide good ventilation. Free circulation of air prevents the hydrogen from accumulating. The roof of the building should be designed in a way that allows it to be carried away when an explosion happens. It should also have a special piping system, far from other pipes. A UV/IR flame detector is a hydrogen sensor that can be put in the building system.
If you are dealing with equipment powered by liquid hydrogen, you must keep it from being ignited. You must eliminate all sources of sparks. This could come from electrical equipments, static electricity, fire, and hot objects. All safety measures should take place not only at your place, but also in fueling stations, and automobile manufacturing industries.