Reply To: would nuclear energy really be accessible to all?

[Allan Brewer]

Allan Brewer wrote:

[Graphene electrical resistivity may be less than 5e-4 nΩ·m; …Shall we put a graphene coating on everything, then? ..

I have spoken with a graphene expert and unfortunately the extremely high conductivity is only (presently) attainable on the nano-scale. Although coating techniques are available on the scale of our electrodes, the result is molecularly non-contiguous flakes which results in a much lower conductivity than Copper and Beryllium.

So the only way I can see of drastically reducing the electrode resistive heating would be to have an ultra-slim “high-Tc” superconductor inside the Beryllium anode connecting at many points to the anode, and cooled by liquid nitrogen.
Does anyone know if liquid nitrogen has ever been used as a primary coolant?
How bad would it be in blocking X-rays?
Even if not possible as a primary coolant it still might be possible to cool the superconductor through an inner channel that way and have helium gas as the main coolant?