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     | Input1Name  = Construction Parts IV
     | Input1Name  = Construction Parts IV
     | Input1Qty  = 1500
     | Input1Qty  = 1500
     | Input2Name  = Electronics III
     | Input2Name  = Titanium Alloy
     | Input2Qty  = 200
     | Input2Qty  = 200
    | Input3Name  = Electronics III
    | Input3Qty  = 200
   }}
   }}
| Workers      = 200
| Workers      = 200
| Electricity  = None
| Electricity  = None
| MaintenanceIII = 36
| MaintenanceIII = 43
| Footprint    = 45x21*
| Footprint    = 45x21*
| BoostByUnity  = no
| BoostByUnity  = no
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The '''Fast Breeder Reactor''' is a machine that generates large amounts of {{infoicon|Steam (Super)|new=yes}} from {{infoicon|Water}} and {{infoicon|Core Fuel|new=yes}} for use in generators. And also, the reactor can enrich {{infoicon|Blanket Fuel|new=yes}} to {{infoicon|Blanket Fuel (Enriched)|new=yes}}, which is used in the production of {{infoicon|Core Fuel|new=yes}}. Considering the lower process, produced {{infoicon|Blanket Fuel (Enriched)|text=Blanket Fuels (Enriched)|new=yes}} are more than spent {{infoicon|Core Fuel|plural=s|new=yes}}.  
The '''Fast Breeder Reactor''' is a machine that generates large amounts of {{infoicon|SteamSp|text=Steam (Super)|link=Steam (Super)|new=yes}} from {{infoicon|Water}} and {{infoicon|Core Fuel|new=yes}} for use in generators. The reactor can also enrich {{infoicon|Blanket Fuel|new=yes}} to {{infoicon|Blanket Fuel (Enriched)|new=yes}}, which is used in the production of {{infoicon|Core Fuel|new=yes}} and other nuclear products.  


Because of this, it is only necessary to produce enough initial {{infoicon|Core Fuel|plural=|new=yes}} from a [[Chemical Plant II|Chemical plant II]] to begin the loop, as long as you are recycling the spent core fuel and enriched blanket fuel. Once this cycle is operating successfully, you will only need to make sure that you continue adding a small amount of {{infoicon|Blanket Fuel|new=yes}}, which can be easily made from a very small amount of {{infoicon|Depleted Uranium|new=yes}} or {{infoicon|Yellow Cake|new=yes}}.   
Because of this, it is only necessary to produce enough initial {{infoicon|Core Fuel|plural=|new=yes}} from a [[Chemical Plant II|Chemical plant II]] to begin the loop, as long as you are recycling the spent core fuel and enriched blanket fuel. Once this cycle is operating successfully, you will only need to make sure that you continue adding a small amount of {{infoicon|Blanket Fuel|new=yes}}, which can be easily made from a relatively small amount of {{infoicon|Yellow Cake|new=yes}} with no {{Infoicon|Depleted Uranium|new=yes}} byproduct.   


Power is generated by passing the output {{infoicon|Steam (Super)|new=yes}} through [[Super-pressure Turbine]]s, [[High-pressure Turbine]]s, and [[Low-pressure Turbine]]s with their output shaft connected to [[Power Generator]]s, typically Tier 2 variants of each. A majority of the Water can subsequently be recovered for reuse using a [[Cooling Tower (Large)]].
Power is generated by passing the output {{infoicon|SteamSp|text=Steam (Super)|link=Steam (Super)|new=yes}} through [[Super-pressure Turbine]]s, [[High-pressure Turbine]]s, and [[Low-pressure Turbine]]s with their output shaft connected to [[Power Generator]]s, typically Tier 2 variants of each. A majority of the Water can subsequently be recovered for reuse using a [[Cooling Tower (Large)]].
Generated {{infoicon|Steam (Super)|new=yes}} can be also used to [[Thermal Desalinator|desalinate]] {{infoicon|Seawater}} and produce {{infoicon|Hydrogen}}.
Generated {{infoicon|SteamSp|text=Steam (Super)|link=Steam (Super)|new=yes}} can be also used to [[Thermal Desalinator|desalinate]] {{infoicon|Seawater}} and produce {{infoicon|Hydrogen}}.


== Installation Instructions ==
== Heat Exchange and Overheat==
See [[Nuclear Reactor]]
 
== Automatic Regulation ==
See [[Nuclear Reactor II]]
 
== Core and Blanket Fuel ==
 
=== Core Fuel ===
{{infoicon|Core Fuel|new=yes}} is the primary fuel used by the Fast Breeder Reactor and is required for it to operate. An equal amount of {{infoicon|Core Fuel (Spent)|new=yes}} is produced as the result, which can be reprocessed in a {{infoicon|Nuclear Reprocessing Plant|new=yes}}.
 
{{infoicon|Core Fuel|new=yes}} in a running reactor loop typically does not need to be externally provided. For initiating a loop however a minimum of 40 should be provided so the reactor can begin to work, for which both {{infoicon|Plutonium|new=yes}} and {{infoicon|Enriched Uranium (20%)|new=yes}} can be used.
 
Reprocessing of {{infoicon|Core Fuel (Spent)|new=yes|text=Spent Core Fuel}} returns 75% of the amount as {{infoicon|Core Fuel|new=yes}} alongside a {{infoicon|Fission Product|new=yes}} by-product.
 
=== Blanket Fuel ===
{{infoicon|Blanket Fuel|new=yes}} is an optional input fuel for the reactor. While it does not contribute to power generation, it can be enriched into {{infoicon|Blanket Fuel (Enriched)|new=yes}}, which can in turn be used to produce {{infoicon|Core Fuel|new=yes}} to sustain the reaction or to produce other nuclear products.


In order to get up and running, the Fast Breeder Reactor requires about 40 Core Fuel which must be produced the hard/inefficient way by twice enriching uranium: {{infoicon|Yellow Cake}} into {{infoicon|Enriched Uranium (4%)|new=yes}} into {{infoicon|Enriched Uranium (20%)|new=yes}}. However, once it gets going, reprocessing the Spent Core Fuel and enriching Blanket Fuel can be used instead, which greatly reduce the uranium consumption.
{{infoicon|Blanket Fuel|new=yes}} is typically produced from {{infoicon|Yellowcake|new=yes}}, though {{infoicon|Depleted Uranium|new=yes}}, {{infoicon|Spent Fuel|new=yes}} and {{infoicon|Spent MOX|new=yes}} as by-products of earlier nuclear power production chains can also be used to produce it.


For an effective steady state, arrange input priorities for Core Fuel as follows:
The enrichment of {{infoicon|Blanket Fuel|new=yes}} is optional. The reactor's {{infoicon|SteamSp|text=Steam|link=Steam (Super)|new=yes}} production and {{infoicon|Core Fuel|new=yes}} consumption are not affected if {{infoicon|Blanket Fuel|new=yes}} is not provided or {{infoicon|Blanket Fuel (Enriched)|new=yes}} is not removed.
# Recovered from Spent Core Fuel in a [[Nuclear Reprocessing Plant]] (80% recovery rate)
# Made from Blanket Fuel (Enriched) in an [[Enrichment Plant]] (yields slightly more than enough to make up the remaining 20%)
# Made from Enriched Uranium (20%) in a [[Chemical Plant II]] (only at start)


Also, arrange input priorities for Blanket Fuel as follows:
Reprocessing of {{infoicon|Blanket Fuel (Enriched)|new=yes}} returns 75% of the amount as {{infoicon|Blanket Fuel|new=yes}} and the rest as a secondary product of choice.
{| class="wikitable"
!Product
!{{infoicon|Core Fuel|new=yes}}
!{{infoicon|Enriched Uranium (20%)|new=yes}}
!{{infoicon|Plutonium|new=yes}}
|-
|{{infoicon|Blanket Fuel (Enriched)|new=yes|icononly=yes}} not returned as {{infoicon|Blanket Fuel|new=yes|icononly=yes}}
|1
|2
|4
|-
|Product count
|1
|1
|1
|}


# Recovered from Blanket Fuel (Enriched) as byproduct of Core Fuel recipe
== Enrichment options ==
# Made from Depleted Uranium in [[Chemical Plant II]] (if left over from regular Nuclear Reactor)
The Fast Breeder Reactor has three modes of enrichment:
# Made from Yellow Cake in [[Chemical Plant II]]


== Heat Exchange and Overheat==
0: Enriches no {{infoicon|Blanket Fuel|new=yes}} and halves {{infoicon|Core Fuel|new=yes}} consumption. Not recommended unless you have a lot of {{infoicon|Plutonium|new=yes}} to spend.
See [[Nuclear Reactor]]
 
1: Enriches as much {{infoicon|Blanket Fuel|new=yes}} as {{infoicon|Core Fuel|new=yes}} consumed. This mode creates a zero-sum loop where only {{infoicon|Blanket Fuel|new=yes}} needs to be provided and {{infoicon|Fission Product|new=yes}} to be removed, and is ideal for power generation.
 
3: Enriches trice as much {{infoicon|Blanket Fuel|new=yes}} as {{infoicon|Core Fuel|new=yes}} spent and cuts  {{infoicon|SteamSp|text=Steam|link=Steam (Super)|new=yes}} production by 75%. Used to produce {{infoicon|Plutonium|new=yes}} and {{infoicon|Enriched Uranium (20%)|new=yes}} for space-related parts.


== Automatic Regulation ==
Below are the recipes for all three operating modes at 1x and 4x reactor speed.<!--
See [[Nuclear Reactor II]]


== Enrichment of Blanket Fuel ==


Enrichment of {{infoicon|Blanket Fuel|new=yes}} is optional and does not affect reactor performance. It runs at the same speed as the main recipe (the one that produces {{infoicon|Steam (Super)|new=yes}} from {{infoicon|Core Fuel|new=yes}}) but enriches 1.2 units of {{infoicon|Blanket Fuel|new=yes}} per unit of Core Fuel consumed. As an illustration, at 4X reactor speed, the enrichment along with the main recipe behaves like the following combined recipe:
-->


{{recipe draw
{{recipe draw
   | Input1Name  = Water
   | Input1Name  = Water
   | Input1Qty  = 96
   | Input1Qty  = 96
   | Input2Name  = Core Fuel
   | Input2Name  = CoreFuel
   | Input2Qty  = 1
   | Input2Qty  = 2
  | Input3Name  = Blanket Fuel
   | Time        = 60
  | Input3Qty  = 1.2
   | Output1Name = SteamSp
   | Time        = 15
   | Output1Name = Steam (Super)
   | Output1Qty  = 96
   | Output1Qty  = 96
   | Output2Name = Core Fuel (Spent)
   | Output2Name = CoreFuelDirty
   | Output2Qty  = 1
   | Output2Qty  = 2
  | Output3Name = Blanket Fuel (Enriched)
}}{{recipe draw
  | Output3Qty  = 1.2
}}<!--
 
 
-->{{recipe define
   | Input1Name  = Water
   | Input1Name  = Water
   | Input1Qty  = 96
   | Input1Qty  = 96
   | Input2Name  = Core Fuel
   | Input2Name  = CoreFuel
   | Input2Qty  = 1
   | Input2Qty  = 4
   | Time        = 15
  | Input3Name  = BlanketFuel
   | Output1Name = Steam (Super)
  | Input3Qty  = 4
   | Time        = 60
   | Output1Name = SteamSp
   | Output1Qty  = 96
   | Output1Qty  = 96
   | Output2Name = Core Fuel (Spent)
   | Output2Name = CoreFuelDirty
   | Output2Qty  = 1
   | Output2Qty  = 4
}}{{recipe define
  | Output3Name = BlanketFuelEnriched
  | Output3Qty  = 4
}}{{recipe draw
  | Input1Name  = Water
  | Input1Qty  = 24
  | Input2Name  = CoreFuel
  | Input2Qty  = 4
  | Input3Name  = BlanketFuel
  | Input3Qty  = 12
  | Time        = 60
  | Output1Name = SteamSp
  | Output1Qty  = 24
  | Output2Name = CoreFuelDirty
  | Output2Qty  = 4
  | Output3Name = BlanketFuelEnriched
  | Output3Qty  = 12
}}{{recipe draw
   | Input1Name  = Water
   | Input1Name  = Water
   | Input1Qty  = 96
   | Input1Qty  = 384
   | Input2Name  = Core Fuel
   | Input2Name  = CoreFuel
   | Input2Qty  = 1
   | Input2Qty  = 8
   | Time        = 20
   | Time        = 60
   | Output1Name = Steam (Super)
   | Output1Name = SteamSp
   | Output1Qty  = 96
   | Output1Qty  = 384
   | Output2Name = Core Fuel (Spent)
   | Output2Name = CoreFuelDirty
   | Output2Qty  = 1
   | Output2Qty  = 8
}}{{recipe define
}}{{recipe draw
   | Input1Name  = Water
   | Input1Name  = Water
   | Input1Qty  = 96
   | Input1Qty  = 384
   | Input2Name  = Core Fuel
   | Input2Name  = CoreFuel
   | Input2Qty  = 1
   | Input2Qty  = 16
   | Time        = 30
  | Input3Name  = BlanketFuel
   | Output1Name = Steam (Super)
  | Input3Qty  = 16
   | Output1Qty  = 96
   | Time        = 60
   | Output2Name = Core Fuel (Spent)
   | Output1Name = SteamSp
   | Output2Qty  = 1
   | Output1Qty  = 384
}}{{recipe define
   | Output2Name = CoreFuelDirty
   | Output2Qty  = 16
  | Output3Name = BlanketFuelEnriched
  | Output3Qty  = 16
}}{{recipe draw
   | Input1Name  = Water
   | Input1Name  = Water
   | Input1Qty  = 96
   | Input1Qty  = 96
   | Input2Name  = Core Fuel
   | Input2Name  = CoreFuel
   | Input2Qty  = 1
   | Input2Qty  = 16
  | Input3Name  = BlanketFuel
  | Input3Qty  = 48
   | Time        = 60
   | Time        = 60
   | Output1Name = Steam (Super)
   | Output1Name = SteamSp
   | Output1Qty  = 96
   | Output1Qty  = 96
   | Output2Name = Core Fuel (Spent)
   | Output2Name = CoreFuelDirty
   | Output2Qty  = 1
   | Output2Qty  = 16
}}{{recipe define
   | Output3Name = BlanketFuelEnriched
   | Input1Name  = Blanket Fuel
   | Output3Qty = 48
   | Input1Unit = ?
  | Time        = 15
  | Output1Name = Blanket Fuel (Enriched)
  | Output1Unit = ?
}}
}}
{{Footer Infobox}}
{{Footer Infobox}}

Latest revision as of 13:23, 5 November 2026

Fast Breeder Reactor

Construction
1500
+
200
+
200
Workers 200
ElectricityNone
Maintenance 43.0 / 60 
Footprint45x21*
Required ResearchFast Breeder Reactor
Boost by UnityNot Available
DesignationPower Production 
VariantsNuclear Reactor
Nuclear Reactor II

The Fast Breeder Reactor is a machine that generates large amounts of Steam (Super) from Water and Core Fuel for use in generators. The reactor can also enrich Blanket Fuel to Blanket Fuel (Enriched), which is used in the production of Core Fuel and other nuclear products.

Because of this, it is only necessary to produce enough initial Core Fuel from a Chemical plant II to begin the loop, as long as you are recycling the spent core fuel and enriched blanket fuel. Once this cycle is operating successfully, you will only need to make sure that you continue adding a small amount of Blanket Fuel, which can be easily made from a relatively small amount of Yellowcake with no Depleted Uranium byproduct.

Power is generated by passing the output Steam (Super) through Super-pressure Turbines, High-pressure Turbines, and Low-pressure Turbines with their output shaft connected to Power Generators, typically Tier 2 variants of each. A majority of the Water can subsequently be recovered for reuse using a Cooling Tower (Large). Generated Steam (Super) can be also used to desalinate Seawater and produce Hydrogen.

Heat Exchange and Overheat

See Nuclear Reactor

Automatic Regulation

See Nuclear Reactor II

Core and Blanket Fuel

Core Fuel

Core Fuel is the primary fuel used by the Fast Breeder Reactor and is required for it to operate. An equal amount of File:CoreFuelSpent.png Core Fuel (Spent) is produced as the result, which can be reprocessed in a Nuclear Reprocessing Plant.

Core Fuel in a running reactor loop typically does not need to be externally provided. For initiating a loop however a minimum of 40 should be provided so the reactor can begin to work, for which both Plutonium and File:EnrichedUranium20Perc.png Enriched Uranium (20%) can be used.

Reprocessing of File:CoreFuelSpent.png Spent Core Fuel returns 75% of the amount as Core Fuel alongside a Fission Product by-product.

Blanket Fuel

Blanket Fuel is an optional input fuel for the reactor. While it does not contribute to power generation, it can be enriched into Blanket Fuel (Enriched), which can in turn be used to produce Core Fuel to sustain the reaction or to produce other nuclear products.

Blanket Fuel is typically produced from Yellowcake, though Depleted Uranium, Spent Fuel and Spent MOX as by-products of earlier nuclear power production chains can also be used to produce it.

The enrichment of Blanket Fuel is optional. The reactor's Steam production and Core Fuel consumption are not affected if Blanket Fuel is not provided or Blanket Fuel (Enriched) is not removed.

Reprocessing of Blanket Fuel (Enriched) returns 75% of the amount as Blanket Fuel and the rest as a secondary product of choice.

Product Core Fuel File:EnrichedUranium20Perc.png Enriched Uranium (20%) Plutonium
not returned as 1 2 4
Product count 1 1 1

Enrichment options

The Fast Breeder Reactor has three modes of enrichment:

0: Enriches no Blanket Fuel and halves Core Fuel consumption. Not recommended unless you have a lot of Plutonium to spend.

1: Enriches as much Blanket Fuel as Core Fuel consumed. This mode creates a zero-sum loop where only Blanket Fuel needs to be provided and Fission Product to be removed, and is ideal for power generation.

3: Enriches trice as much Blanket Fuel as Core Fuel spent and cuts Steam production by 75%. Used to produce Plutonium and File:EnrichedUranium20Perc.png Enriched Uranium (20%) for space-related parts.

Below are the recipes for all three operating modes at 1x and 4x reactor speed.

96
96
2
2
60 
60 
96
96
2
2
96
96
4
4
4
4
60 
60 
96
96
4
4
4
4
24
24
4
4
12
12
60 
60 
24
24
4
4
12
12
384
384
8
8
60 
60 
384
384
8
8
384
384
16
16
16
16
60 
60 
384
384
16
16
16
16
96
96
16
16
48
48
60 
60 
96
96
16
16
48
48

Recipes

Below are all the recipes which this building is capable of producing. Note that some of them may be locked behind Research and not immediately available in your game.

24
24
4
4
12
12
60 
60 
24
24
4
4
12
12
48
48
8
8
24
24
60 
60 
48
48
8
8
24
24
72
72
12
12
36
36
60 
60 
72
72
12
12
36
36
96
96
16
16
48
48
60 
60 
96
96
16
16
48
48
96
96
2
2
60 
60 
96
96
2
2
96
96
4
4
4
4
60 
60 
96
96
4
4
4
4
192
192
4
4
60 
60 
192
192
4
4
192
192
8
8
8
8
60 
60 
192
192
8
8
8
8
288
288
6
6
60 
60 
288
288
6
6
288
288
12
12
12
12
60 
60 
288
288
12
12
12
12
384
384
8
8
60 
60 
384
384
8
8
384
384
16
16
16
16
60 
60 
384
384
16
16
16
16