Storage Depot B

Storage Depot B is a room in Metroid Prime in the Phazon Mines. It is where you obtain the Flamethrower. To get into this room, you have to come from the room before this and use a Power Bomb on some switch or something. After that, the shield that was blocking the Plasma Beam door will be unlocked and you will have to use the Plasma Beam to open the entryway to this room.