There are three types of coolant cell, each used to craft the next. The Iridium Neutron Reflector can be crafted two ways (horizontal or vertical, as shown).
Neutron reflectors are used to reflect neutron pulses, making adjacent fuel rods more efficient. They do not provide any output on their own.
In the first setup, the fuel rod produces the same output (10 EU/t, 12 heat) as each of the rods in the second - which combined would produce 20 EU/t and 24 heat, like a Dual Fuel Rod (Uranium) would in isolation. All three of the fuel rods above are receiving a neutron pulse; the first rod from itself via the reflector, the other two rods from each other.
Every reflected neutron pulse reduces a reflector's durability by 1. Dual and quad fuel rods (which give off multiple pulses) reduce durability by 2 or 4, accordingly.
- This reflector loses 16 durability per reactor tick:
The reflectors all operate the same as far as reflecting pulses; the difference lies in their durability.
- The Neutron Reflector has 30K durability, meaning it can sit next to a Fuel Rod (Uranium) for a reactor cycle and a half before disintegrating.
- The Thick Neutron Reflector has 120K durability, meaning it can sit next to a Quad Fuel Rod (Uranium) for a reactor cycle and a half before disintegrating.
- The Iridium Neutron Reflector has no durability; it takes no damage from reflecting neutron pulses, and so (barring a reactor mishap) will last indefinitely.