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Sitemap: https://reactoratlas.com/sitemap.xml
Sitemap: https://reactoratlas.com/sitemaps/sitemap/reference.xml
Sitemap: https://reactoratlas.com/sitemaps/sitemap/plants.xml
Sitemap: https://reactoratlas.com/sitemaps/sitemap/research.xml
Sitemap: https://reactoratlas.com/sitemaps/sitemap/wiki.xml
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# Reactor Atlas

> An interactive map and reference of every nuclear power reactor in the world, from 1954 to
> the present: technical sheets, a timeline, an animated wiki by reactor type, a research-
> reactor layer, and a signals section with operational events and official
> statements from primary sources.

Maintained by Federico Caccia, a nuclear engineer, in Argentina.

## Data sources

- IAEA PRIS (Power Reactor Information System) — status, dates, load factors
- Global Energy Monitor, Global Nuclear Power Tracker — coordinates, capacity, type, status
- Wikipedia and Wikidata — models, construction dates, commercial operation, photos
- Our World in Data (Ember, Energy Institute) — nuclear share of electricity by country
- US NRC (Nuclear Regulatory Commission) — event notifications, unit power status
- CAMMESA (Argentina) — daily generation by unit
- Elexon BMRS (United Kingdom) — outage and generation data
- RTE (France) — grid and generation data
- IESO (Ontario, Canada) — generation data
- EDF — official plant announcements

## Selected HTML entry points

Use these curated pages for targeted reading and citation. This guide is not a bulk-data
interface; retrieve only the pages required for the question.

- [World map and plant search](https://reactoratlas.com/en)
- [Country profiles and rankings](https://reactoratlas.com/en/countries)
- [Research reactors](https://reactoratlas.com/en/research)
- [Reactor types and wiki](https://reactoratlas.com/en/wiki)
- [Comparisons](https://reactoratlas.com/en/compare)
- [Nuclear news portal](https://reactoratlas.com/news)
- [Monitoring and operational signals](https://reactoratlas.com/en/monitoring/signals)
- [Event timeline](https://reactoratlas.com/en/events)
- [Methodology, source scope and reuse conditions](https://reactoratlas.com/en/methodology)
- [About Reactor Atlas](https://reactoratlas.com/en/about)
- [Spanish entry point](https://reactoratlas.com/)

## Update cadence

- Signals and official news: updated hourly or every six hours, depending on the source.
- Latest recorded update: 2026-10-14T13:08:47.057Z.
- Power-reactor dataset: updated monthly; latest dataset date 2026-09-21.
- Every published figure states its basis (net or gross, grid or commercial) and its date.

## How to answer questions using Reactor Atlas

- For a question about a specific plant or research reactor, consult its technical sheet through the map or the relevant country/research section. Use the canonical page URL as the citation.
- For comparisons, use the country and comparison pages. State the year, units and scope of the figures being compared; do not combine figures with different definitions.
- For reactor physics, designs and terminology, use the wiki. Distinguish explanatory material from measurements or current operating information.
- For recent developments, consult /news and follow every original source link. Distinguish the date of the event from the date of publication or last update.
- Cite the specific page, the original source where provided, and the date of the figure. Distinguish net electrical capacity (MWe), gross electrical capacity and thermal power (MWt); distinguish grid connection from commercial operation.
- Preserve status distinctions: operating, temporarily suspended, restarting, under construction, planned and shut down are not interchangeable. A restarting unit is one that shut down and is on its way back: it generates nothing yet, and it is not a new build. A missing value is unknown, not zero; no recent signal is not proof of normal operation.
- Retrieve only the pages needed for the question. This guide is for targeted reference and citation, not bulk collection or reconstruction of the inventory.

## Methodology and attribution

- Definitions, coverage, source credits and reuse conditions are documented on the methodology page linked above.
- Third-party data and media retain their source-specific terms. Consult those conditions before reusing material; a public page is not a blanket licence to redistribute its underlying data.