If you try to contain fusion in a small area with destroyable elements, it's impossible because fusion will repeat itself and destroy anything destroyable. you can only increase the time before the container is destroyed.
hmm..maybe. but is it possible to "slow down" fusion? but of course, it is easy to contain it if it was a large area instead of a small box. but sometimes the fusion stops if the area is too large (the elec and neut won't be close enough to produce hygn)
Well, I am currently developing plans to rework my old fusion reactor into one that is 100% destroyable by using molten TTAN as the inner wall of my containment vessel. It will also double as a way to transfer heat to make steam.
try SPRK'ed INWR, it cools down to about 200c (cool enough to not melt) when it sparks
Doable, at least for HYGN fusion. Maybe QRTZ or TTAN for containment, and a heck of a lot of cooling. QRTZ has the downside of shattering under pressure or cold, but I believe it has the highest melting point for the destroyable materials, with the added bonus that even when subjected to higher temperatures, it doesn't melt all at once and some pixels will temporarily still remain solid. Or maybe integrate CLNE into the containment, and use particle-absorbing wall to deal with the melting insides of the chamber. Also, you could have an inert gas partially filling the fusion area, to keep the really hot stuff less likely to touch meltable materials and as a temperature buffer (BOYL anyone?)
And, as others said, keep it slow. Maybe use powered CLNE and a temperature trigger to stop fuel delivery if things get too hot. If you can prevent the control circuit from becoming a molten pool.
These being said, I'd truly love to see a destroyable fusion reactor, especially for NBLE and CO2. But those would truly require smart ideas.