Advanced Gas-cooled Reactor
E843202
The Advanced Gas-cooled Reactor is a British-designed nuclear power reactor type that uses graphite as a moderator and carbon dioxide as a coolant to generate electricity.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Advanced Gas-cooled Reactor canonical | 2 |
| AGR (Advanced Gas-cooled Reactor) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10133738 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Advanced Gas-cooled Reactor Context triple: [Heysham 1 nuclear power station, reactorType, Advanced Gas-cooled Reactor]
-
A.
Rolls-Royce PWR2 nuclear reactor
The Rolls-Royce PWR2 is a British-designed pressurized water nuclear reactor used to provide long-endurance, high-power propulsion for the Royal Navy’s nuclear submarines.
-
B.
X-10 graphite reactor
The X-10 graphite reactor was an early nuclear reactor at Oak Ridge, Tennessee, built during the Manhattan Project as a pilot plant for plutonium production and a key step toward the development of nuclear weapons and nuclear energy.
-
C.
S2W nuclear reactor
The S2W nuclear reactor was an early U.S. Navy pressurized water reactor design that powered the world’s first operational nuclear-powered submarine, USS Nautilus.
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D.
IBR-2 reactor
The IBR-2 reactor is a fast pulsed research nuclear reactor used primarily for neutron scattering experiments in condensed matter physics and materials science.
-
E.
Pressurised water reactor
A pressurised water reactor is a type of nuclear fission reactor that uses high-pressure water as both coolant and neutron moderator to generate heat for producing electricity or naval propulsion.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Advanced Gas-cooled Reactor Target entity description: The Advanced Gas-cooled Reactor is a British-designed nuclear power reactor type that uses graphite as a moderator and carbon dioxide as a coolant to generate electricity.
-
A.
Rolls-Royce PWR2 nuclear reactor
The Rolls-Royce PWR2 is a British-designed pressurized water nuclear reactor used to provide long-endurance, high-power propulsion for the Royal Navy’s nuclear submarines.
-
B.
X-10 graphite reactor
The X-10 graphite reactor was an early nuclear reactor at Oak Ridge, Tennessee, built during the Manhattan Project as a pilot plant for plutonium production and a key step toward the development of nuclear weapons and nuclear energy.
-
C.
S2W nuclear reactor
The S2W nuclear reactor was an early U.S. Navy pressurized water reactor design that powered the world’s first operational nuclear-powered submarine, USS Nautilus.
-
D.
IBR-2 reactor
The IBR-2 reactor is a fast pulsed research nuclear reactor used primarily for neutron scattering experiments in condensed matter physics and materials science.
-
E.
Pressurised water reactor
A pressurised water reactor is a type of nuclear fission reactor that uses high-pressure water as both coolant and neutron moderator to generate heat for producing electricity or naval propulsion.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
nuclear reactor type
ⓘ
power reactor ⓘ |
| backupShutdownSystem | nitrogen injection into coolant ⓘ |
| controlRodMaterial |
boron carbide
ⓘ
boron steel ⓘ |
| coolantFlowPath | upward through fuel channels ⓘ |
| coolantPhase | gas ⓘ |
| coolantPressure | high pressure ⓘ |
| coolantRole | heat removal from fuel ⓘ |
| coreDesign | graphite moderator core with vertical fuel channels ⓘ |
| countryOfOrigin | United Kingdom ⓘ |
| deploymentStatus | operated only in the United Kingdom ⓘ |
| designer | United Kingdom Atomic Energy Authority NERFINISHED ⓘ |
| designGoal |
higher thermal efficiency than Magnox reactors
ⓘ
use of higher coolant outlet temperature ⓘ |
| firstCommercialStation |
Hinkley Point B nuclear power station
GENERATED
ⓘ
Hunterston B nuclear power station GENERATED ⓘ |
| firstGridConnectionYear | 1976 GENERATED ⓘ |
| fuelCladdingMaterial | stainless steel ⓘ |
| fuelEnrichment | low-enriched uranium ⓘ |
| fuelType | uranium dioxide ⓘ |
| graphiteRole | neutron moderation ⓘ |
| mainOperator | EDF Energy NERFINISHED ⓘ |
| moderatorMaterial | graphite blocks ⓘ |
| neutronSpectrum | thermal ⓘ |
| numberOfStationsBuilt | 7 twin-unit stations GENERATED ⓘ |
| operatorCountry | United Kingdom NERFINISHED ⓘ |
| predecessor | Magnox reactor NERFINISHED ⓘ |
| pressureVesselType | pre-stressed concrete pressure vessel ⓘ |
| primaryPurpose | electricity generation ⓘ |
| reactorCoolant | CO2 gas ⓘ |
| reactorGeneration | Generation II ⓘ |
| reactorModerator | graphite ⓘ |
| safetyFeature |
diverse shutdown systems
ⓘ
multiple independent cooling circuits ⓘ pre-stressed concrete containment ⓘ |
| shutdownSystem | gravity-inserted control rods ⓘ |
| steamCondition | high temperature steam ⓘ |
| steamCycleType | indirect ⓘ |
| steamRaisingMethod | heat transfer from CO2 to water in boilers ⓘ |
| successorConcept | pressurised water reactor in UK fleet planning ⓘ |
| typicalElectricalOutputRange | about 600 to 660 MWe per unit ⓘ |
| typicalFuelAssemblyForm | cluster of stainless-steel clad fuel pins GENERATED ⓘ |
| typicalInletCoolantTemperature | about 290 degrees Celsius GENERATED ⓘ |
| typicalOutletCoolantTemperature | about 640 degrees Celsius GENERATED ⓘ |
| typicalRefuellingMethod | on-load refuelling GENERATED ⓘ |
| typicalThermalEfficiency | around 41 percent GENERATED ⓘ |
| usesCoolant | carbon dioxide ⓘ |
| usesModerator | graphite ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Advanced Gas-cooled Reactor Description of subject: The Advanced Gas-cooled Reactor is a British-designed nuclear power reactor type that uses graphite as a moderator and carbon dioxide as a coolant to generate electricity.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
AGR (Advanced Gas-cooled Reactor)
subject surface form:
Hinkley Point B nuclear power station