"Reactor fleet" refers to a group or collection of reactors, which are devices used to produce nuclear energy through a controlled process called nuclear fission. Full definition
Virtually the entire U.S. nuclear reactor fleet participated in this program by using fuel fabricated with low enriched uranium from the Megatons to Megawatts program. (centrusenergy.com)
But it is increasingly clear that China's partnership with Westinghouse to build its most recent nuclear reactor design — the AP - 1000 — may provide the technology blueprint for the bulk of the country's future reactor fleet. (scientificamerican.com)
But the lack of discussions of nuclear energy in the main ministerial meeting leaves off the table important questions about how to manage the world's existing reactor fleet given rising competition from cheap natural gas and concerns about safety and security. (dotearth.blogs.nytimes.com)