Foundations
Energy basics, energy density, and how a nuclear reactor actually makes power.
Core concepts
What nuclear fission is
Settled scienceSplitting a heavy nucleus (usually uranium-235) unleashes the binding energy of the atom as heat, and a self-sustaining chain reaction keeps it going — an awesome bit of physics we've learned to hold perfectly steady for years.
Energy density: why a little fuel goes a long way
Settled scienceA fingertip-sized fuel pellet holds about the energy of a ton of coal. This single fact gives nuclear its tiny footprint, minuscule waste volume, and unmatched fuel security — no other clean, firm source comes close.
How a power reactor works end-to-end
Settled scienceFuel, moderator, coolant, control rods, and a power-conversion system. Master these five parts and you can read any reactor design — and appreciate how much room they leave for innovation.
Fusion: the other nuclear
ContestedWhat fusion is, why it's so attractive, and an honest read on how far away practical fusion power really is — distinct from the fission that powers today's reactors.
Most substantial articles
Common misconceptions
Myth: A reactor is basically a slow nuclear bomb.
Reality: Reactor fuel is far too dilute to explode like a bomb; it just produces heat to boil water.
Myth: Nuclear plants emit smoke from those big towers.
Reality: Cooling towers release only water vapor — there's no combustion and no smoke.
From Nucleation Capital
Source: Nucleation Capital✓ Active recall
1. Roughly how much coal does a single uranium fuel pellet replace in energy terms?
2. What part of a reactor slows neutrons so the chain reaction can sustain?