K-27 plant
E233765
The K-27 plant was a major uranium enrichment facility at the Oak Ridge site that used gaseous diffusion technology as part of the U.S. nuclear weapons and energy programs.
All labels observed (2)
| Label | Occurrences |
|---|---|
| K-27 plant canonical | 1 |
| K-33 plant | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2105540 — 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: K-27 plant Context triple: [K-25 Project, adjacentFacility, K-27 plant]
-
A.
S-50 thermal diffusion plant
The S-50 thermal diffusion plant was a World War II facility at Oak Ridge used in the Manhattan Project to enrich uranium through thermal diffusion as part of the U.S. atomic bomb program.
-
B.
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.
-
C.
K Reactor
K Reactor is a decommissioned nuclear production reactor at the Savannah River Site in South Carolina that was used primarily for producing weapons-grade materials during the Cold War.
-
D.
Onsan National Industrial Complex
Onsan National Industrial Complex is a major South Korean industrial zone in Ulsan known for its large-scale petrochemical, metal, and heavy manufacturing facilities.
-
E.
Sasang Industrial Complex
Sasang Industrial Complex is a major manufacturing and logistics hub in Busan, South Korea, housing a dense concentration of factories and industrial facilities.
- 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: K-27 plant Target entity description: The K-27 plant was a major uranium enrichment facility at the Oak Ridge site that used gaseous diffusion technology as part of the U.S. nuclear weapons and energy programs.
-
A.
S-50 thermal diffusion plant
The S-50 thermal diffusion plant was a World War II facility at Oak Ridge used in the Manhattan Project to enrich uranium through thermal diffusion as part of the U.S. atomic bomb program.
-
B.
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.
-
C.
K Reactor
K Reactor is a decommissioned nuclear production reactor at the Savannah River Site in South Carolina that was used primarily for producing weapons-grade materials during the Cold War.
-
D.
Onsan National Industrial Complex
Onsan National Industrial Complex is a major South Korean industrial zone in Ulsan known for its large-scale petrochemical, metal, and heavy manufacturing facilities.
-
E.
Sasang Industrial Complex
Sasang Industrial Complex is a major manufacturing and logistics hub in Busan, South Korea, housing a dense concentration of factories and industrial facilities.
- F. None of above. chosen
Statements (34)
| Predicate | Object |
|---|---|
| instanceOf |
gaseous diffusion plant
ⓘ
industrial facility ⓘ uranium enrichment plant ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| hasFunction |
isotope separation
ⓘ
separation of uranium-235 from uranium-238 ⓘ |
| industry | nuclear industry ⓘ |
| locatedAtSite | Oak Ridge Reservation ⓘ |
| locatedIn |
Anderson County, Tennessee
ⓘ
Oak Ridge Reservation ⓘ
surface form:
Oak Ridge
Oak Ridge, Tennessee ⓘ Roane County, Tennessee NERFINISHED ⓘ Oak Ridge Reservation ⓘ
surface form:
United States Department of Energy Oak Ridge site
|
| materialHandled |
depleted uranium
ⓘ
enriched uranium ⓘ uranium hexafluoride ⓘ |
| operator |
United States government
ⓘ
surface form:
U.S. government
United States Atomic Energy Commission ⓘ |
| ownedBy | United States government ⓘ |
| partOf |
Oak Ridge Gaseous Diffusion Plant
ⓘ
surface form:
Oak Ridge gaseous diffusion complex
Oak Ridge Gaseous Diffusion Plant ⓘ
surface form:
Oak Ridge gaseous diffusion plants
Oak Ridge Reservation ⓘ
surface form:
Oak Ridge site
|
| partOfProgram |
U.S. nuclear energy program
ⓘ
United States nuclear weapons program ⓘ
surface form:
U.S. nuclear weapons program
|
| safetyConcern |
chemical contamination risk
ⓘ
radiological contamination risk ⓘ |
| sitedNear | K-25 plant ⓘ |
| subjectOf |
U.S. nuclear history studies
ⓘ
environmental remediation planning ⓘ |
| technologyUsed | gaseous diffusion ⓘ |
| use |
production of enriched uranium for nuclear energy programs
ⓘ
production of enriched uranium for nuclear weapons ⓘ uranium enrichment ⓘ |
| usedFor | support of Cold War nuclear capabilities ⓘ |
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: K-27 plant Description of subject: The K-27 plant was a major uranium enrichment facility at the Oak Ridge site that used gaseous diffusion technology as part of the U.S. nuclear weapons and energy programs.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
K-33 plant