Plasma Refinery Complex

The Plasma Refinery Complex was a large, triple-domed structure erected on the cliff face next to the Royal Palace of Naboo, in the city of Theed. Built to draw vast quantities of rare plasma out of the planet's core, the refinery complex included the Theed Hangar and the city's main power generator, as well as the headquarters of the Royal Naboo Security Forces.

Layout
A triple-domed structure located on the cliff face of Theed, the Plasma Refinery Complex consisted of several distinct areas which saw a variety of use and function. Built along the banks of the Solleu River and the Virdugo Plunge, the refinery complex was a model of Neo-Classical design and employed a simple but elegant form. Constructed from large sandstone-like stone covered by a ribbed roof, the stone was embedded with a high-tensile durasteel support webbing while the roof was lined with blast-proof green plates to protect the structure from attack.

Located alongside the complex was the city's main hangar, strategically placed within the same complex so that the plasma from the refinery could easily be pumped into the N-1 starfighters of the Naboo Royal Space Fighter Corps. While the hangar had a separate entrance from the rest of the complex, a hallway connected the main flight deck with the complex's extracting shaft.

Within the first of the three domed structures closest to the hangar was the seemingly bottomless extracting shaft. A hemispherical chamber with black paneled walls which constantly monitored and compensated for pressure changes, the shaft was crisscrossed by several rings of catwalks. A series of twelve evenly spaced acceleration shafts soared from the bottom of the pit and into the ceiling; a thermal carbon membrane containing the plasma which had been forced out of the core and upward through vacuum suction. On the other side of the shaft was the city's power generator, located under the first building's ground floor. Above it was the facility's main activator and purification chamber, which in turn were beneath a corridor of laser gates. These doors, inspired by a Naboo legend regarding the gates holding back chaos, would lock into position to hold back potentially dangerous quantities of power outputs. Beyond the corridor was the generator's core, a massive shaft plummeting into the depths of the massive reactor. Along the sides of the smooth shaft were high-energy particle coils which were employed when plasma slough needed to be curtailed.

The massive drum-shaped holding tank which occupied the central building stored mass quantities of refined plasma. The Naboo, cautious of shortages or double-crossing by Damask Holdings or the Trade Federation, held mass quantities of plasma in reserve in case of increased spacecraft use. At the top of the tank, a recirculation lid reduced the oxygen levels in the chamber to maintain the vacuum in the tank.

Source(s)

 * https://starwars.wikia.com/wiki/Plasma_Refinery_Complex
 * https://starwars.wikia.com/wiki/Theed_Royal_Palace