> I doubt that will last the stated 30 years. Gases such as hydrogen and helium are very hard to contain. Even the smallest crack or gasket problem will let it

> I doubt that will last the stated 30 years. Gases such as hydrogen and helium are very hard to contain. Even the smallest crack or gasket problem will let it go. Might be slightly easier than usual in this case because it's self-contained. It's not a reservoir that needs connection to the outside.