nuclear reactor

Tightly sealed area where fission of the fuel is carried out in a controlled manner to release heat.

reactor building

Concrete structure surrounding the reactor vessel; it is a protective barrier against radioactivity.

pressure tube

Tube that holds the fuel bundles and circulates the coolant at a preset pressure.

reactor vessel

The core of the nuclear reactor consists of tubular spaces where fission is produced and the coolant and moderator circulate.

spent fuel storage bay

Water-filled basin where the spent fuel is stored for several years before it can be disposed of safely.

containment building

Concrete structure surrounding the reactor vessel; it is a protective barrier against radioactivity.

fuel bundle

Fuel pencils that are grouped in parallel for introduction into the reactor.

fuel pellet

Small quantity of fuel that consists of powder pressed into a sheathing tube and then inserted into the metal cladding of the pencil.