The Reactor Room is the room in Strangetown Hotel where the player can charge the furnace with Nuclear Fuel Rods to power the hotel in The Sims 2. Along with the Freezer, it's the only room leading off the basement level which is unlocked at the start of the game.
As well as being used to power the hotel, the furnace can also be used to charge the Metal Detector which can be used in the Desert in order to find treasures. However, if only one fuel rod remains in the furnace, more must be added in order for the detector to be charged. As well as many other rooms, skillpoints can be found here at various times during the week.