Segment
Firm low-carbon power: generation that runs regardless of weather
A system of solar, wind and batteries handles most hours well and struggles with the rest. Firm low-carbon generation covers those hours — and it is the category data-centre operators have been contracting directly, because their load is flat and continuous.
In one sentence
Firm low-carbon power is generation that produces continuously regardless of weather and emits little carbon dioxide — principally nuclear fission, geothermal, and reservoir hydroelectricity.
The case is arithmetic. Meeting a flat load entirely with variable generation requires either enormous storage or a very oversized portfolio, and the cost of both rises steeply as the last percentage points of reliability are pursued. A modest amount of firm generation removes that tail, which is why it appears in most credible plans for deep decarbonisation.
It is also what a data centre wants. A continuous load matched hour by hour is easier and cheaper to serve with firm output than with variable generation plus storage, which is why contracts for existing nuclear output attracted such attention and why new nuclear designs are being discussed alongside compute build-outs.
How this breaks down
Split by technology, and by where each one is actually constrained.
- Firm low-carbon powerthis page
- Small modular reactorsSmaller units built in a factory rather than on site, and why none of that is proven yet at scale.Definition pageChokepoint
- Nuclear fuel cycleWhere reactor fuel comes from, the concentrated step in the middle, and what happens afterwards.Breaks down into: Uranium mining · Conversion · Enrichment · Fuel fabrication4 pages belowChokepoint
- Geothermal and hydroTwo mature firm technologies, one constrained by geology and one by rivers — and what drilling could change.Definition pageChokepoint
What this depends on
1 of these is marked as a chokepoint: a handful of qualified suppliers, a multi-year lead time, or a single geography.
- StandardChokepoint
Regulatory approval
Licensing is the longest and least compressible part of any nuclear project, and it is a design constraint in itself.
- Resource
Long-tenor capital and offtake
These plants cost a great deal up front and earn it back over decades, so nothing is financed without a contract long enough to cover that.
- Resource
Sites with cooling water
Thermal plant needs a dependable supply of cooling water and hydro and geothermal need particular geology, so siting is settled before any of the engineering is.
What depends on this
Other pages in this map that name Firm low-carbon power as something they cannot do without.
Companies across Firm low-carbon power
Every company named on a step below this page, ordered by how many of those steps it appears at. Compiled from the pages themselves rather than written separately, so the two cannot disagree. Not a ranking and not a recommendation.
- China National Nuclear CorporationChina3 steps
- OranoPrivate3 steps
- RosatomRussia2 steps
- X-energyPrivate2 steps
- AndritzVienna1 step
24 more companies appear at a single step each; they are named on the pages for those steps.
How these pages are written
Each page explains one technology in plain language, states what it depends on, and names companies by what they supply at that step. Company roles are described qualitatively and deliberately carry no market shares, revenue figures or rankings — those change faster than an explainer can, and a stale number is worse than none. Ticker links point at company pages on this site and are provided for reference only.
Nothing here is investment advice, a recommendation, or a forecast. A company named on a page about a technology is not thereby a good investment, and the chokepoints described are structural facts about supply chains rather than predictions about prices. Technology moves; where a page describes something as unresolved or in development, that was true when it was written.
Plutux is not an investment adviser. Market data and AI-generated analysis are for information and education only, not investment advice. Disclaimer