Vault Star super-reactor

The Vault-Tec Vault Star super-reactor is a high performance energy source developed by the corporation for use in vaults and other facilities requiring a high powered energy source, such as the automated missile silos of the Appalachian Automated Launch System. It consists of three distinct elements: The core, containing the nuclear rods, a shield that provides radiation protection and additional connections, and a platform for mounting the entire reactor.

It is classified by the military as a class-VIII reactor and is used in automated facilities, such as the aforementioned Appalachian missile silos, to provide power indefinitely. To maintain redundancy, it's usually paired with multiple Class-IV fusion reactors, megacells, and connections to civilian infrastructure.