F Reactor
E6774
graphite-moderated reactor
nuclear reactor
plutonium production reactor
water-cooled reactor
weapons-grade plutonium production facility
F Reactor was one of the early plutonium production reactors at the Hanford Site in Washington, built during the Manhattan Project to support the U.S. nuclear weapons program.
All labels observed (1)
| Label | Occurrences |
|---|---|
| F Reactor canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T63448 — 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: F Reactor Context triple: [Hanford Site, reactor, F Reactor]
-
A.
B Reactor
B Reactor is the world’s first full-scale plutonium production reactor, built during the Manhattan Project at the Hanford Site in Washington State.
-
B.
Visual Studio
Visual Studio is Microsoft's integrated development environment (IDE) used for building, debugging, and deploying applications across Windows, web, cloud, and mobile platforms.
-
C.
Kvartal 95 Studio
Kvartal 95 Studio is a Ukrainian television production and entertainment company best known for its comedy shows and satirical content, including the series "Servant of the People."
-
D.
Autoport
Autoport is a specialized automotive terminal within the Port of Boston used for handling, storing, and processing imported and exported vehicles.
-
E.
Delphi
Delphi is an ancient Greek sanctuary and archaeological site famed for the Oracle of Apollo and its central role in classical Greek religion and culture.
- 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: F Reactor Target entity description: F Reactor was one of the early plutonium production reactors at the Hanford Site in Washington, built during the Manhattan Project to support the U.S. nuclear weapons program.
-
A.
B Reactor
B Reactor is the world’s first full-scale plutonium production reactor, built during the Manhattan Project at the Hanford Site in Washington State.
-
B.
Visual Studio
Visual Studio is Microsoft's integrated development environment (IDE) used for building, debugging, and deploying applications across Windows, web, cloud, and mobile platforms.
-
C.
Kvartal 95 Studio
Kvartal 95 Studio is a Ukrainian television production and entertainment company best known for its comedy shows and satirical content, including the series "Servant of the People."
-
D.
Autoport
Autoport is a specialized automotive terminal within the Port of Boston used for handling, storing, and processing imported and exported vehicles.
-
E.
Delphi
Delphi is an ancient Greek sanctuary and archaeological site famed for the Oracle of Apollo and its central role in classical Greek religion and culture.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
graphite-moderated reactor
ⓘ
nuclear reactor ⓘ plutonium production reactor ⓘ water-cooled reactor ⓘ weapons-grade plutonium production facility ⓘ |
| associatedWithEvent | development of the first U.S. nuclear weapons ⓘ |
| builtFor |
Manhattan Engineer District of the U.S. Army Corps of Engineers
ⓘ
surface form:
Manhattan Engineer District
|
| cleanupProgram | Hanford Site environmental remediation ⓘ |
| commissioningDate | 1945-02-25 ⓘ |
| constructionStartDate | 1943 ⓘ |
| coolant | river water ⓘ |
| coolantSource | Columbia River ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| designedBy | DuPont ⓘ |
| environmentalConcern | radioactive contamination of soil and groundwater ⓘ |
| firstCriticalityDate | 1945-02-25 ⓘ |
| fuelCladding | aluminum ⓘ |
| fuelType | natural uranium metal ⓘ |
| heritageDesignation | part of Hanford historic Manhattan Project resources ⓘ |
| historicalPeriod | World War II ⓘ |
| historicalUse | production of plutonium for Cold War nuclear arsenal ⓘ |
| locatedIn |
Benton County, Washington
ⓘ
Hanford Site, Washington ⓘ
surface form:
Hanford Site
Washington ⓘ
surface form:
Washington State
|
| managedBy |
U.S. Department of Energy
ⓘ
surface form:
U.S. Department of Energy (during cleanup era)
|
| moderatorMaterial | graphite ⓘ |
| nearbyFacility |
B Reactor
ⓘ
D Reactor ⓘ |
| operator |
DuPont
ⓘ
General Electric ⓘ U.S. Army Corps of Engineers ⓘ |
| ownedBy | United States government ⓘ |
| partOf |
Hanford Site, Washington
ⓘ
surface form:
Hanford Engineer Works
Hanford Site, Washington ⓘ
surface form:
Hanford plutonium production complex
Hanford production reactors ⓘ
surface form:
Hanford single-pass production reactors
Manhattan Project ⓘ |
| purpose |
production of plutonium for nuclear weapons
ⓘ
support of U.S. nuclear weapons program ⓘ |
| reactorType | single-pass production reactor ⓘ |
| safetyFeature | multiple independent cooling systems ⓘ |
| shutdownDate | 1965-06-23 ⓘ |
| sisterReactor |
B Reactor
ⓘ
D Reactor ⓘ |
| status |
cocooned
ⓘ
decommissioned ⓘ |
| technology | graphite neutron moderator ⓘ |
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: F Reactor Description of subject: F Reactor was one of the early plutonium production reactors at the Hanford Site in Washington, built during the Manhattan Project to support the U.S. nuclear weapons program.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Hanford Site