Reactor Column is the fuel rack an Ala Industrial reactor burns: a transparent stand that seats four Fuel Rods — 576,000 EU at 144,000 EU per rod — inside a room run by the Reactor Controller. A right-click with a Fuel Rod seats a rod in the first free slot with a metallic click, and a right-click with an empty hand pulls one back out, burnt-out Fuel Rod Claddings first. Reactor Column keeps no menu: occupied slots, bright rods versus dark claddings, and the water level in quarters all read straight off the model. Wear lands on every fuelled rod at once — every 144 EU a rod contributes costs it one of its 1000 durability points — so a fully loaded Reactor Column burns down as a set, and each finished rod turns into a Fuel Rod Cladding right in its slot. Fuel is spent only while the reaction actually delivers energy: with the controller buffer full, Reactor Column stops wearing altogether.

Cooling is the Reactor Column's second job. Reactor Column carries a 4000 mB water tank and a 4000 mB steam tank: pipes push water into any face except the top, while steam leaves only through the top face into an extracting pipe, and neither direction can be reversed. One millibucket of water absorbs 2 heat and comes back as 1 mB of steam, so a lone column drinks 8 mB per tick (a tick is 1/20 of a second) while a dense zone at the reactor ceiling needs up to 273 mB per tick; without water a single column climbs to the accident mark in about 31 seconds. Reactor Column blocks stacked vertically act as one tall vessel, filled from the bottom and vented from the top. One craft turns four Iron Ingots, four Reactor Glass, and one Shielding Plate into two columns; the block exists only in the Java Edition of the mod (Minecraft 26.2, Fabric and NeoForge) and is mined with a pickaxe at hardness 3 and blast resistance 6. Breaking Reactor Column returns every rod intact — only the water and steam are lost.