Sellafield
E234080
Sellafield is a nuclear fuel reprocessing and decommissioning site on the coast of Cumbria in northwest England.
All labels observed (12)
How this entity was disambiguated
This entity first appeared as the object of triple T2119266 — 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: Sellafield Context triple: [Barrow-in-Furness railway station, connectsTo, Sellafield]
-
A.
Heysham 1 nuclear power station
Heysham 1 nuclear power station is a twin-reactor advanced gas-cooled nuclear power facility located on the Lancashire coast of England, generating electricity for the UK grid.
-
B.
Didcot Power Station
Didcot Power Station is a large former coal- and oil-fired power station in Oxfordshire, England, notable for its distinctive cooling towers and prominent role in the UK’s electricity generation before its decommissioning.
-
C.
Atomic Weapons Research Establishment, Aldermaston
The Atomic Weapons Research Establishment at Aldermaston is the United Kingdom’s principal nuclear weapons research and development facility, historically central to the design and maintenance of the country’s nuclear arsenal.
-
D.
Atomic Energy Research Establishment Harwell
Atomic Energy Research Establishment Harwell was a major British nuclear research center in Oxfordshire that played a key role in the development of the United Kingdom’s atomic energy program after World War II.
-
E.
Liddell Power Station
Liddell Power Station is a large coal-fired power plant in New South Wales, Australia, long serving as a major source of electricity generation before its planned closure as part of the country’s energy transition.
- 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: Sellafield Target entity description: Sellafield is a nuclear fuel reprocessing and decommissioning site on the coast of Cumbria in northwest England.
-
A.
Heysham 1 nuclear power station
Heysham 1 nuclear power station is a twin-reactor advanced gas-cooled nuclear power facility located on the Lancashire coast of England, generating electricity for the UK grid.
-
B.
Didcot Power Station
Didcot Power Station is a large former coal- and oil-fired power station in Oxfordshire, England, notable for its distinctive cooling towers and prominent role in the UK’s electricity generation before its decommissioning.
-
C.
Atomic Weapons Research Establishment, Aldermaston
The Atomic Weapons Research Establishment at Aldermaston is the United Kingdom’s principal nuclear weapons research and development facility, historically central to the design and maintenance of the country’s nuclear arsenal.
-
D.
Atomic Energy Research Establishment Harwell
Atomic Energy Research Establishment Harwell was a major British nuclear research center in Oxfordshire that played a key role in the development of the United Kingdom’s atomic energy program after World War II.
-
E.
Liddell Power Station
Liddell Power Station is a large coal-fired power plant in New South Wales, Australia, long serving as a major source of electricity generation before its planned closure as part of the country’s energy transition.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
industrial facility
ⓘ
nuclear decommissioning site ⓘ nuclear reprocessing site ⓘ |
| constructionBegan | 1940s ⓘ |
| country | United Kingdom ⓘ |
| employs | thousands of workers ⓘ |
| formerName |
Calder Hall
ⓘ
linked to:
Sellafield
Windscale ⓘ
linked to:
Sellafield
|
| gridReference | NY030060 ⓘ |
| hasAccident | Windscale fire ⓘ |
| hasAlternativeName |
Sellafield nuclear complex
ⓘ
linked to:
Sellafield
Sellafield nuclear site ⓘ
linked to:
Sellafield
|
| hasEnvironmentalConcern | radioactive discharges to the Irish Sea ⓘ |
| hasFacility |
Calder Hall nuclear power station
ⓘ
linked to:
Sellafield
High Level Waste Storage Tanks ⓘ MOX fuel fabrication plant ⓘ Magnox reprocessing plant ⓘ
linked to:
Sellafield
Sellafield nuclear fuel storage ponds ⓘ
linked to:
Sellafield
Sellafield reprocessing plants ⓘ
linked to:
Sellafield
Thermal Oxide Reprocessing Plant ⓘ Windscale Piles ⓘ
linked to:
Sellafield
|
| hasNearbyRailwayStation | Sellafield railway station ⓘ |
| hasOwnerType | state-owned ⓘ |
| hasReprocessingActivity |
Magnox fuel
ⓘ
oxide fuel ⓘ |
| hasSecurityLevel | high security site ⓘ |
| hasSiteArea | about 6 square kilometres ⓘ |
| locatedIn |
Borough of Copeland
ⓘ
Cumbria ⓘ England ⓘ North West England ⓘ |
| locatedNear |
Seascale
ⓘ
Whitehaven ⓘ |
| locatedOnCoastOf | Irish Sea ⓘ |
| managedBy | Nuclear Decommissioning Authority ⓘ |
| operatedBy |
Sellafield Ltd
ⓘ
linked to:
Sellafield
|
| ownedBy | Nuclear Decommissioning Authority ⓘ |
| primaryFunction |
nuclear decommissioning
ⓘ
nuclear fuel reprocessing ⓘ radioactive waste management ⓘ |
| region | Cumbria ⓘ |
| regulator |
Environment Agency
ⓘ
linked to:
Environment Agency (England)
Office for Nuclear Regulation ⓘ |
| status | undergoing long-term decommissioning ⓘ |
| usedFor |
civil nuclear power generation (historical)
ⓘ
plutonium production for nuclear weapons (historical) ⓘ |
| windscaleFireDate | 1957 ⓘ |
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: Sellafield Description of subject: Sellafield is a nuclear fuel reprocessing and decommissioning site on the coast of Cumbria in northwest England.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Sellafield
linked to: Sellafield
linked to: Sellafield
linked to: Sellafield
linked to: Sellafield
linked to: Sellafield
linked to: Sellafield
linked to: Sellafield
linked to: Sellafield
linked to: Sellafield
linked to: Sellafield