TRISO fuel so.. pebble bed? Is there a reluctance to market on this? The Chinese were all-in.

Great to see engineering deliver on time. I wonder if Rolls Royce will also have a smooth ride. It's a PWR.

Prismatic (or cylindrical) TRISO also makes sense. There are lots of potential problems using pebble beds (circulation, grinding), whereas doing regular refuelling cycles avoids them, in exchange for down-time to refuel.

TRISO increases fuel cycle costs. It's harder to make, harder to dispose of, and (IIRC) uses higher enrichment.