Originally Posted by
TransWorld
On electrical power plants, once all the leaks are fixed, they do not have leaks in use. That is the more practical solution. They do not use a secondary containment that is vented, as you suggested as a possible solution. Getting them tested and fixed are a real pain, though. It feels like they are chasing spook dust.
My guess is dynamics of flight would cause small leaks to pop up over time, hence needing a vented containment. Maybe somebody will come up with a leak-proof system which will last 30+ years and 100,000+ airframe cycles.
The containment doesn't need to be high tech, or metal. With sufficient flow, it doesn't need to be perfect either, just prevent more than trace H2 concentrations in the shroud. Old engineering refrain: Dilution is the Solution.