[eberkund]

I think that is easier said than done, the temperatures are in the several thousands of degrees here.

[askvictor]

And radioactive. Which changes the atoms if which your containment material is made of. Which makes things much, much more difficult.

[IshKebab]

Clay would hold that wouldn't it?

[Neil44]

Depends, most types of ceramic are molten by 1300-1400 centigrade

[faceplanted]

These catchers exist, they use a ceramic-concrete mixture with a massive melting temperature.