Quarantine Access B is a short tunnel in the Phazon Mines in Metroid Prime. Like most rooms in Level 3 of the Mines, Samus must traverse over a Phazon-covered floor by jumping on Saturnines. However, in this room, Samus encounters 3 unscannable, invisible Pulse Bombus; invisible, that is, to all but the X-Ray Visor. With the X-Ray Visor on, Samus can easily target and destroy them with her Wave Beam.