Portsmouth Gaseous Diffusion Plant (historical)
E135646
The Portsmouth Gaseous Diffusion Plant was a major U.S. uranium enrichment facility in Ohio that played a key role in producing enriched uranium for nuclear weapons and commercial nuclear power during the Cold War.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Portsmouth Gaseous Diffusion Plant | 2 |
| Fernald site | 1 |
| Portsmouth Gaseous Diffusion Plant (historical) canonical | 1 |
| Portsmouth Nuclear Site | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1114539 — 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: Portsmouth Gaseous Diffusion Plant (historical) Context triple: [United States nuclear weapons complex, includesFacility, Portsmouth Gaseous Diffusion Plant (historical)]
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A.
Paducah Gaseous Diffusion Plant
The Paducah Gaseous Diffusion Plant is a former U.S. Department of Energy uranium enrichment facility in western Kentucky that played a major role in producing enriched uranium for nuclear power and defense.
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B.
Pantex Plant
Pantex Plant is a U.S. nuclear weapons facility in Texas responsible for the assembly, disassembly, and maintenance of the nation’s nuclear warheads.
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C.
Savannah River Site
Savannah River Site is a U.S. Department of Energy nuclear reservation in South Carolina historically used for producing materials for nuclear weapons and now focused on environmental cleanup and nuclear materials management.
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D.
Oak Ridge Reservation
Oak Ridge Reservation is a large U.S. Department of Energy site in Oak Ridge, Tennessee, historically central to the Manhattan Project and now a major center for nuclear research, environmental management, and national security work.
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E.
Y-12 National Security Complex
The Y-12 National Security Complex is a U.S. Department of Energy facility central to nuclear weapons production, uranium processing, and national security operations.
- 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: Portsmouth Gaseous Diffusion Plant (historical) Target entity description: The Portsmouth Gaseous Diffusion Plant was a major U.S. uranium enrichment facility in Ohio that played a key role in producing enriched uranium for nuclear weapons and commercial nuclear power during the Cold War.
-
A.
Paducah Gaseous Diffusion Plant
The Paducah Gaseous Diffusion Plant is a former U.S. Department of Energy uranium enrichment facility in western Kentucky that played a major role in producing enriched uranium for nuclear power and defense.
-
B.
Pantex Plant
Pantex Plant is a U.S. nuclear weapons facility in Texas responsible for the assembly, disassembly, and maintenance of the nation’s nuclear warheads.
-
C.
Savannah River Site
Savannah River Site is a U.S. Department of Energy nuclear reservation in South Carolina historically used for producing materials for nuclear weapons and now focused on environmental cleanup and nuclear materials management.
-
D.
Oak Ridge Reservation
Oak Ridge Reservation is a large U.S. Department of Energy site in Oak Ridge, Tennessee, historically central to the Manhattan Project and now a major center for nuclear research, environmental management, and national security work.
-
E.
Y-12 National Security Complex
The Y-12 National Security Complex is a U.S. Department of Energy facility central to nuclear weapons production, uranium processing, and national security operations.
- F. None of above. chosen
Statements (43)
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: Portsmouth Gaseous Diffusion Plant (historical) Description of subject: The Portsmouth Gaseous Diffusion Plant was a major U.S. uranium enrichment facility in Ohio that played a key role in producing enriched uranium for nuclear weapons and commercial nuclear power during the Cold War.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
United States nuclear weapons complex
→
includesFacility
→
Portsmouth Gaseous Diffusion Plant (historical)
ⓘ
Paducah Gaseous Diffusion Plant
→
sisterFacility
→
Portsmouth Gaseous Diffusion Plant (historical)
ⓘ
this entity surface form:
Portsmouth Gaseous Diffusion Plant
Fernald Feed Materials Production Center (historical)
→
alsoKnownAs
→
Portsmouth Gaseous Diffusion Plant (historical)
ⓘ
subject surface form:
Fernald Feed Materials Production Center
this entity surface form:
Fernald site
Portsmouth Gaseous Diffusion Plant (historical)
→
adjacentFacility
→
Portsmouth Gaseous Diffusion Plant (historical)
self-linksurface differs
ⓘ
subject surface form:
Portsmouth Gaseous Diffusion Plant
this entity surface form:
Portsmouth Nuclear Site
this entity surface form:
Portsmouth Gaseous Diffusion Plant