The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Given as scheduled, per the source: "planned for early 2027".
The B1M, a well-regarded engineering/construction video outlet, covers the European Spallation Source project described in the pin, but as a secondary explainer rather than an ESS[3] statement its confirmation is weaker, and the page content could not be retrieved (domain blocked) to confirm the 2027 date.
ESS's own official site, published 7 July 2026, headlines progress "advancing toward first neutrons," directly backing the pin's "planned for early 2027" claim as the primary institutional source, though the article text could not be retrieved (domain blocked).
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most.
Westinghouse announced the launch of a small version of its flagship AP1000 nuclear reactor on Thursday.
The new reactor, called the AP300, aims to be available in 2027, and will generate about a third of the power as the flagship AP1000 reactor, enough to power about 300,000 homes.
It’s expected to cost about $1 billion to set up each plant, a small fraction of the expense of the full AP1000.