Isolation door
An isolation door is a special reinforced door designed to separate a hazardous area from the rest of a starship or space station. Isolation doors are often employed in main engineering, specifically to seal off the warp core and dangerous antimatter reactants in the event of a warp core breach or loss of antimatter containment.
Isolation doors were also used in the nacelle tube control rooms aboard Galaxy Class starships. The isolation doors could be opened with the protection of a one-way force field. The doors, however, could only remain open for 90 seconds in order prevent force field degradation and the release of drive plasma.
Some starships, like the Intrepid Class lack isolation doors as their engineering is extremely open and are separate from the rest of the ship with no open corridors leading to the area.
