Central Reactor Core

The Central Reactor Core is a part of the Reactor Silo that had the auxiliary power lost. Samus went to the Auxiliary Power Station and got the auxiliary power restored, so the auxiliary power was restored again. After Samus completed that, she had to go to Sector 2 to defeat Nettori to stop the vines from choking the activity of the Main Deck. Sector 2 is a few rooms away from this room, so Samus can get to this sector faster.