Cosmic Log has the details.
The following is a guest post from Matt Wald, senior communications advisor at NEI. Follow Matt on Twitter at @MattLWald.
From the batteries in our cell phones to the clothes on our backs, "nanomaterials" that are designed molecule by molecule are working their way into our economy and our lives. Now there’s some promising work on new materials for nuclear reactors.
Reactors are a tough environment. The sub atomic particles that sustain the chain reaction, neutrons, are great for splitting additional uranium atoms, but not all of them hit a uranium atom; some of them end up in various metal components of the reactor. The metal is usually a crystalline structure, meaning it is as orderly as a ladder or a sheet of graph paper, but the neutrons rearrange the atoms, leaving some infinitesimal voids in the structure and some areas of extra density. The components literally grow, getting longer and thicker. The phenomenon is well understood and designers compensate for it with a …
From the batteries in our cell phones to the clothes on our backs, "nanomaterials" that are designed molecule by molecule are working their way into our economy and our lives. Now there’s some promising work on new materials for nuclear reactors.
Reactors are a tough environment. The sub atomic particles that sustain the chain reaction, neutrons, are great for splitting additional uranium atoms, but not all of them hit a uranium atom; some of them end up in various metal components of the reactor. The metal is usually a crystalline structure, meaning it is as orderly as a ladder or a sheet of graph paper, but the neutrons rearrange the atoms, leaving some infinitesimal voids in the structure and some areas of extra density. The components literally grow, getting longer and thicker. The phenomenon is well understood and designers compensate for it with a …
Comments
In Reinventing the Solar Power Satellite Geoffrey Landis explores how space-based solar power could be switched on demand from one city to a higher-bidding one thousands of km away. The beams have to fly six to seven Earth radii anyway.
This long flight also makes it impossible to focus them very tightly. The antenna farms have to be big. Aggressive sharers of ignorance are always talking about weaponizability and cooked geese. It's a waste of time to try to correct them, but good to know that these issues were dealt with long ago. No geese will be cooked by SPS, except maybe in kitchen ovens powered by it.
--- G.R.L. Cowan, boron car fan
Internal combustion without exhaust gas
Nuclear, solar, hydro, and wind can power our civilization for centuries at far lower cost.
SpaceX might ultimately reduce launch costs by an order of magnitude, but to do better something radically new will probably be needed.
There are some vaguely feasible ideas to do so, but none of them have been demonstrated, and would take a lot of time and money to bring to fruition.
But until that occurs, space solar power is a very expensive pipedream.
But, like many other things, it takes time and effort to discover this. At first glance, huge space-based arrays collecting unlimited solar energy seem much more attractive than "dirty old fission."