Fusion Reactor
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The fusion reactor is a large, expensive, and advanced type of reactor that works by fusing light elements into heavier ones, producing heat to then be converted into large amounts of electricity. The plasma also produces various different byproducts and neutron flux (if the reaction is not aneutronic).
The most basic setup consists of a plasma vessel (torus), cooled with perfluoromethyl, and an air-cooled klystron, to ignite the plasma.
In more advanced setups, where more energy is needed to ignite the higher-tier plasmas, multiple tori can be connected together to avoid using multiple klystrons.
Components
Fusion Reactor Vessel
The fusion reactor vessel or the torus is the main component of the fusion reactor, where energy from a klystron is used to generate plasma. It requires both perfluoromethyl cooling and electricity to work; the structure itself has 4 connection ports for any external components, and any devices that use plasma energy split the total output amongst themselves.
It has 3 input fluid slots and 1 output fluid and item slot, with it holding 4000 mB of fuel and 10 MHE of electricity; below its GUI there are 3 gauges, with the left one indicating input klystron energy, the middle one indicating output plasma energy in MTU, and the right one indicating fuel consumption.
Working speed is determined by both the buffered electric charge and the fuel levels, as when either is below 50%, fuel will be burned slower, decreasing output plasma energy.
How much klystron energy is going into the torus doesn't affect the processing speed, as more energy will not accelerate the reaction.
Construction
The torus is a 15x15x5 multiblock structure that requires the following items to be assembled:
| Part | Recipe |
|---|---|
| x484 Superconducting BSCCO Coils | |
| x484 Cast Steel Plates | 3 Ingots |
| x280 Fusion Reactor Piping Blocks | |
| x160 Fusion Reactor Blankets | |
| x1 Blowtorch or Acetylene Welding Torch | |
Klystron
The klystron serves as the main energy source of a fusion reactor, it uses electricity and compressed air to generate input klystron energy (KyU) at a rate of 1 HE : 1 KyU.
Its GUI contains a text box that defines the output target, with it being able to generate up to 1 MKyU. It can hold 25 MHE of buffered energy and 150,000 mB of compressed air; if any of the 2 falls below 50%, the klystron will start to throttle; if the klystron output does not meet the torus' required input energy, the plasma will instantly extinguish.
Recipe
It can be assembled in an assembly machine using the following recipe:
Collector Chamber
The collector chamber is a component that can be attached to a torus in order to increase the byproduct production rate by 50%. It has no GUI or ports, and it does not use any plasma energy or flux.
Recipe
It can be assembled in an assembly machine using the following recipe:
Breeding Chamber
The breeding chamber is a component that uses neutron flux from a torus in order to process materials. It can perform any recipe from the RBMK irradiation chamber as well as a few additional recipes.
It is not affected by port sharing rules, and thus all 4 of the torus' ports output the same amount of flux.
Recipe
It can be assembled in an assembly machine using the following recipe:
Boiler
The boiler is the most basic energy-extracting component, it uses incoming plasma output energy (in TU/t) from the torus to boil water into super dense steam. Like a regular boiler, it uses 200 TU/mB of water to boil, however, it produces a higher compression level of steam, making it more efficient than conventional boilers.
It has an internal buffer of 32,000 mB of water and super dense steam.
Since they use plasma energy, boilers are affected by port sharing rules, thus multiple boilers connected to a torus will have decreased energy amounts for each boiler, but will overall increase the total energy extracted from the torus.
Recipe
It can be assembled in an assembly machine using the following recipe:
MHD Turbine
The magnetohydrodynamic turbine or MHD turbine is an advanced component that can produce electricity directly from plasma energy without needing to boil water. While they are considerably more expensive than boilers, they have a +35% bonus when converting from TU to HE.
It required perfluoromethyl cooling in order to function, and it must also have a minimum input of 5 MTU/t of plasma energy otherwise its efficiency will be halved.
Since they use plasma energy, MHD turbines are affected by port sharing rules, thus multiple turbines connected to a torus will have decreased energy amounts for each turbine, but will overall increase the total energy extracted from the torus.
Recipe
It can be assembled in an assembly machine using the following recipe:
Coupler
The coupler is one of the most useful fusion reactor components (especially for higher-tier plasmas), being able to connect 2 tori together and turn outgoing plasma energy from one torus into usable klystron energy to be used as a power source for another torus. Higher-tier fuel combinations require this as the minimum input energies can exceed what 4 klystrons are able to provide (4 MKyU/t).
It is affected by port sharing rules, meaning that the coupler's output will be affected if a boiler or an MHD turbine is connected to the same torus.
Recipe
It can be assembled in an assembly machine using the following recipe:
Plasma Types

The following is a table listing all possible fuel combinations to be used in the fusion reactor. All recipes take 5 seconds to process at a power consumption rate of 25 kHE/t.
| Plasma Type | Input(s) | Output | Klystron Input Energy | Plasma Output Energy | Output Neutron Flux | Requires coupler to ignite |
|---|---|---|---|---|---|---|
| Deuterium | Deuterium (20 mB) | Helium-4 (1000 mB) | 750.0 kKyU/t | 1.0 MTU/t | 50.0 flux/t | No |
| Deuterium-Oxygen | Deuterium (10 mB)
Liquid Oxygen (10 mB) |
Ionized Particles (1) | 250.0 kKyU/t | 1.25 MTU/t | 50.0 flux/t | No |
| Deuterium-Tritium | Deuterium (10 mB)
Tritium (10 mB) |
Helium-4 (1000 mB) | 750.0 kKyU/t | 3.75 MTU/t | 100.0 flux/t | No |
| Tritium-Chlorine | Tritium (10 mB)
Chlorine Gas (10 mB) |
Chlorophyte Powder (1) | 2.5 MKyU/t | 6.25 MTU/t | 500.0 flux/t | No |
| Helium-3 | Helium-3 (20 mB) | Helium-4 (1000 mB) | 500.0 kKyU/t | 3.75 MTU/t | 0.0 flux/t (aneutronic) | No |
| Tritium-Helium-4 | Tritium (10 mB)
Helium-4 (10 mB) |
Ionized Particles (1) | 875.0 kKyU/t | 4.0 MTU/t | 500.0 flux/t | No |
| Chlorine | Chlorine Gas (20 mB) | Chlorophyte Powder (1) | 3.75 MKyU/t | 10.0 MTU/t | 1000.0 flux/t | No |
| DHC | Deuterated Hydrocarbon (10 mB) | Chlorophyte Powder (1) | 10.0 MKyU/t | 25.0 MTU/t | 2000.0 flux/t | Yes |
| Balefire | BF Rocket Fuel (15 mB)
Antimatter (5 mB) |
Thermonuclear Ashes (1) | 1.0 MKyU/t | 12.5 MTU/t | 2000.0 flux/t | No |
| Stellar | Stellar Flux (10 mB) | Gold Powder | 10.0 MKyU/t | 50.0 MTU/t | 10000.0 flux/t | Yes |
Pros and Cons
Pros
- Runs quickly.
- Multiple plasma types.
- Can be started and stopped easily.
- Can process breeding recipes.
- Impossible to meltdown.
Neutral
- Requires a very good setup.
Cons
- Requires lots of input power to kickstart and sustain.
- Expensive.
- Requires perfluoromethyl cooling.
Trivia
- It is based on a real life fusion reactor, the ITER (International Thermonuclear Experimental Reactor) being constructed in France.
- It also used to be referred to as the ITER in the mod's source code until v3 was developed.
- They are both tokamak-type fusion reactors.
- This reactor is actually the third iteration of the fusion reactor, with v2 being deprecated in version
1.0.27_X5523.