Iridium Neutron Reflector is a Nuclear Reactor component in Industrial Craft 2 that passively raises the efficiency of every adjacent fuel rod by reflecting neutron pulses back into the rod. A single Fuel Rod (Uranium) placed beside Iridium Neutron Reflector produces 10 EU/t and 12 heat — the same figures as each rod of a running pair, because the reflected pulse counts as a neutron pulse from a neighbor. Unlike the craftable Neutron Reflector with 30,000 durability and the Thick Neutron Reflector with 120,000, Iridium Neutron Reflector has no durability bar at all: reflected pulses deal no damage, so one crafted reflector serves cycle after cycle indefinitely. The recipe is deliberately expensive — six Thick Neutron Reflectors, two Dense Copper Plates and one Iridium Plate — and the component exists only in IC2 Experimental, the Minecraft Forge build of the mod for the Java Edition; the site's reference catalog version is 1.12.2.

In reactor layouts Iridium Neutron Reflector takes the permanent slots: a Thick Neutron Reflector surrounded by four Quad Fuel Rods (Uranium) loses 16 durability every reactor tick, while Iridium Neutron Reflector shrugs off the same neutron load forever. Every reflected pulse raises heat alongside output, so cooling must grow with each reflector added — a pair built from one rod and one reflector burns exactly as hot as a pair built from two rods. For long-term energy farms the one-time iridium price buys a maintenance-free component that Neutron Reflector and Thick Neutron Reflector cannot match, because both cheaper reflectors disintegrate mid-run and need recrafting. A reflector never generates EU on its own: Iridium Neutron Reflector only multiplies what the adjacent fuel rods already produce.