[scrumper]

"First-wall power flux" - am I right in thinking that means the heat energy the innermost wall has to contain? Half a megawatt per square meter? Good lord. You're not making it out of 3/4" plywood then.

Maintenance isn't just about downtime though right? This is gonna have to be supported by your crews traveling globally with trade secret, exotic parts. Not even on the top ten hardest things about this of course.

It's an exciting bet for sure, so good luck - if it works, you're taking a big bite out of a really nasty carbon source.