Magnox
E885275
Magnox is an early-generation British gas-cooled, graphite-moderated nuclear reactor design that used natural uranium metal fuel clad in a magnesium-aluminium alloy.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Magnox canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T10749441 — 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: Magnox Context triple: [Trawsfynydd nuclear power station, reactorType, Magnox]
-
A.
Magnox Ltd
Magnox Ltd is a UK-based nuclear decommissioning company responsible for managing and dismantling former Magnox nuclear power stations.
-
B.
Sellafield
Sellafield is a nuclear fuel reprocessing and decommissioning site on the coast of Cumbria in northwest England.
-
C.
Advanced Gas-cooled Reactor
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.
-
D.
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.
-
E.
K-West Reactor
K-West Reactor is one of the plutonium production reactors at the Hanford Site in Washington State, historically used to support the U.S. nuclear weapons program.
- 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: Magnox Target entity description: Magnox is an early-generation British gas-cooled, graphite-moderated nuclear reactor design that used natural uranium metal fuel clad in a magnesium-aluminium alloy.
-
A.
Magnox Ltd
Magnox Ltd is a UK-based nuclear decommissioning company responsible for managing and dismantling former Magnox nuclear power stations.
-
B.
Sellafield
Sellafield is a nuclear fuel reprocessing and decommissioning site on the coast of Cumbria in northwest England.
-
C.
Advanced Gas-cooled Reactor
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.
-
D.
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.
-
E.
K-West Reactor
K-West Reactor is one of the plutonium production reactors at the Hanford Site in Washington State, historically used to support the U.S. nuclear weapons program.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
gas-cooled reactor
ⓘ
graphite-moderated reactor ⓘ nuclear reactor design ⓘ |
| claddingLimitation | poor corrosion resistance in water ⓘ |
| claddingMaterial | magnesium-aluminium alloy ⓘ |
| claddingName | Magnox alloy NERFINISHED ⓘ |
| controlMechanism | control rods inserted into graphite moderator ⓘ |
| coolant | carbon dioxide gas ⓘ |
| countryOfOrigin | United Kingdom ⓘ |
| decommissioningStatus | all Magnox power stations shut down ⓘ |
| deploymentCountry |
Italy
NERFINISHED
ⓘ
Japan NERFINISHED ⓘ United Kingdom NERFINISHED ⓘ |
| designedForFuelReprocessing | true ⓘ |
| designedForUseWithReprocessingPlants | true ⓘ |
| designedFuelBurnup | low burnup compared to modern reactors ⓘ |
| developer | United Kingdom Atomic Energy Authority NERFINISHED ⓘ |
| firstCommercialStation | Calder Hall GENERATED ⓘ |
| firstCommercialStationCountry | United Kingdom GENERATED ⓘ |
| firstGridConnectionYear | 1956 GENERATED ⓘ |
| fuel | natural uranium metal ⓘ |
| fuelCoolingRequirement | air-cooled fuel storage due to cladding corrosion in water ⓘ |
| fuelCycle | once-through with reprocessing option ⓘ |
| fuelEnrichment | unenriched uranium ⓘ |
| fuelForm | metallic uranium ⓘ |
| fuelHandling | remote fuel handling with shielded facilities ⓘ |
| generation | early generation nuclear reactor ⓘ |
| heatTransferSystem | CO2 gas circulators and boilers ⓘ |
| historicalSignificance | first commercial-scale nuclear power reactor design in the UK ⓘ |
| moderator | graphite ⓘ |
| nameEtymology | derived from "magnesium non-oxidising" referring to cladding ⓘ |
| neutronSpectrum | thermal ⓘ |
| notableStation |
Calder Hall
NERFINISHED
ⓘ
Chapelcross NERFINISHED ⓘ Oldbury NERFINISHED ⓘ Wylfa NERFINISHED ⓘ |
| operatingTemperatureLimit | limited by Magnox cladding properties ⓘ |
| pressureVesselType |
pre-stressed concrete pressure vessel
ⓘ
steel pressure vessel ⓘ |
| primaryUse | electricity generation ⓘ |
| reactorTypeFamily | gas-cooled reactor family ⓘ |
| refuelingMethod |
on-load refuelling
ⓘ
online refuelling ⓘ |
| safetyFeature |
large graphite moderator thermal inertia
ⓘ
low power density core ⓘ |
| secondaryUse | plutonium production ⓘ |
| steamCycle | indirect steam cycle using gas-to-water heat exchangers ⓘ |
| successorDesign | Advanced Gas-cooled Reactor NERFINISHED ⓘ |
| thermalEfficiency | relatively low compared to later reactor designs ⓘ |
| typicalContainment | reactor building with biological shielding GENERATED ⓘ |
| typicalElectricalOutputRange | 50–500 MWe ⓘ |
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: Magnox Description of subject: Magnox is an early-generation British gas-cooled, graphite-moderated nuclear reactor design that used natural uranium metal fuel clad in a magnesium-aluminium alloy.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Hinkley Point A nuclear power station