12 ms·
"Fusion Reactor First Wall Cooling" https://www.youtube.com/watch?v=bHJyoqDO0zw https://www.youtube.com/watch?v=bHJyoqDO0zw talks about the steady-state heat tr
by compumike 4y ago
"Fusion Reactor First Wall Cooling" https://www.youtube.com/watch?v=bHJyoqDO0zw https://www.youtube.com/watch?v=bHJyoqDO0zw talks about the steady-state heat transfer out of a proposed tokamak design. Around 1:09:23 they show "1.5 GW" deposited as "0.3 GW from radiative photons -> surface heating" plus "1.2 GW from 14.1 MeV neutrons -> volumetric heating".
Designing the first wall and the volumetric blanket are, indeed, engineering challenges.
- HPsquared 4y ago1.2 GW worth of neutrons is rather a lot. Neutrons cause damage to materials (e.g. disrupting the microstructure) and also make elements radioactive through neutron capture (activation products). It's a pretty complicated issue really.
- ncmncm 4y agoUsually we spell that "intractable".
- DoreenMichele 4y agoSometimes people know enough to see things as merely complicated. They usually can't adequately explain why in a single forum comment.
- ncmncm 4y agoGenerally somebody should have explained somewhere. But it is not considered very interesting, because nobody seiously expects to ever need to solve it.
- DoreenMichele 4y agoSometimes, it is explained somewhere and it doesn't matter, no one is listening. This topic is not one I'm personally familiar with, so possibly making an ass of myself, but (shrug).