K-25 Project
E37185
The K-25 Project was a World War II–era Manhattan Project effort to build and operate a massive gaseous diffusion plant for uranium enrichment in Oak Ridge, Tennessee.
All labels observed (6)
| Label | Occurrences |
|---|---|
| K-25 | 2 |
| K-25 gaseous diffusion plant | 2 |
| K-25 Gaseous Diffusion Plant (historical) | 1 |
| K-25 Project canonical | 1 |
| K-25 plant | 1 |
| United States uranium enrichment program | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T270071 — 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-25 Project Context triple: [Clinton Engineer Works, associatedWith, K-25 Project]
-
A.
Manhattan Project
The Manhattan Project was the secret U.S.-led World War II research and development program that produced the first nuclear weapons.
-
B.
Chicago Pile-1
Chicago Pile-1 was the world’s first artificial nuclear reactor, achieving the first controlled, self-sustaining nuclear chain reaction in 1942 under the leadership of Enrico Fermi.
-
C.
Trinity test device
The Trinity test device was the first nuclear explosive ever detonated, a plutonium-based implosion bomb tested by the Manhattan Project in July 1945.
-
D.
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.
-
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: K-25 Project Target entity description: The K-25 Project was a World War II–era Manhattan Project effort to build and operate a massive gaseous diffusion plant for uranium enrichment in Oak Ridge, Tennessee.
-
A.
Manhattan Project
The Manhattan Project was the secret U.S.-led World War II research and development program that produced the first nuclear weapons.
-
B.
Chicago Pile-1
Chicago Pile-1 was the world’s first artificial nuclear reactor, achieving the first controlled, self-sustaining nuclear chain reaction in 1942 under the leadership of Enrico Fermi.
-
C.
Trinity test device
The Trinity test device was the first nuclear explosive ever detonated, a plutonium-based implosion bomb tested by the Manhattan Project in July 1945.
-
D.
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.
-
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 (48)
| Predicate | Object |
|---|---|
| instanceOf |
Manhattan Project facility
ⓘ
gaseous diffusion plant ⓘ uranium enrichment plant ⓘ |
| adjacentFacility |
K-27 plant
ⓘ
K-29 plant ⓘ K-31 plant ⓘ K-33 plant ⓘ
linked to:
K-27 plant
|
| architect | Kellex Corporation ⓘ |
| associatedWith |
Little Boy
ⓘ
Oak Ridge National Laboratory ⓘ Y-12 plant ⓘ
linked to:
Y-12 National Security Complex
|
| city |
Oak Ridge
ⓘ
linked to:
Oak Ridge, Tennessee
|
| codeName |
K-25
ⓘ
linked to:
K-25 Project
|
| commissioned | 1945 ⓘ |
| completionDate | 1945 ⓘ |
| constructionStart | 1943-06 ⓘ |
| continent | North America ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| demolitionDate | 2013 ⓘ |
| floorArea | approximately 44 acres ⓘ |
| heritageDesignation | Manhattan Project National Historical Park (site area) ⓘ |
| historicalPeriod |
World War II era
ⓘ
linked to:
World War II
early Cold War era ⓘ |
| inception | 1943 ⓘ |
| locatedIn |
Anderson County, Tennessee
ⓘ
Clinton Engineer Works ⓘ Roane County, Tennessee ⓘ |
| location | Oak Ridge, Tennessee ⓘ |
| mainContractor | Kellex Corporation ⓘ |
| materialProcessed |
natural uranium
ⓘ
uranium hexafluoride ⓘ |
| notableFor |
being one of the largest buildings in the world at the time of construction
ⓘ
key role in producing uranium for the Little Boy bomb ⓘ |
| operator |
Manhattan Engineer District
ⓘ
U.S. Army Corps of Engineers ⓘ |
| ownedBy | U.S. Department of Energy ⓘ |
| partOf |
Manhattan Project
ⓘ
Oak Ridge gaseous diffusion complex ⓘ
linked to:
Oak Ridge Gaseous Diffusion Plant
|
| shape | U-shaped building ⓘ |
| startDate | 1943 ⓘ |
| state | Tennessee ⓘ |
| status | demolished ⓘ |
| successor | Oak Ridge Gaseous Diffusion Plant ⓘ |
| technology | gaseous diffusion ⓘ |
| usedFor |
production of highly enriched uranium
ⓘ
support of the first atomic bombs ⓘ uranium-235 enrichment ⓘ |
| usedIn | World War II ⓘ |
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-25 Project Description of subject: The K-25 Project was a World War II–era Manhattan Project effort to build and operate a massive gaseous diffusion plant for uranium enrichment in Oak Ridge, Tennessee.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: K-25 Project
United States nuclear weapons complex
→
includesFacility
→
K-25 Gaseous Diffusion Plant (historical)
ⓘ
linked to: K-25 Project
linked to: K-25 Project
linked to: K-25 Project
linked to: K-25 Project
linked to: K-25 Project
linked to: K-25 Project