C Reactor
E7605
Hanford Site reactor
graphite-moderated nuclear reactor
military production reactor
plutonium production reactor
C Reactor is one of the early plutonium production reactors built and operated at the Hanford Site in Washington as part of the U.S. Manhattan Project and Cold War nuclear weapons program.
All labels observed (1)
| Label | Occurrences |
|---|---|
| C Reactor canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T63451 — 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: C Reactor Context triple: [Hanford Site, reactor, C Reactor]
-
A.
F Reactor
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.
-
B.
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.
-
C.
D Reactor
D 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.
-
D.
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.
-
E.
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.
- 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: C Reactor Target entity description: C Reactor is one of the early plutonium production reactors built and operated at the Hanford Site in Washington as part of the U.S. Manhattan Project and Cold War nuclear weapons program.
-
A.
F Reactor
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.
-
B.
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.
-
C.
D Reactor
D 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.
-
D.
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.
-
E.
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.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
Hanford Site reactor
ⓘ
graphite-moderated nuclear reactor ⓘ military production reactor ⓘ plutonium production reactor ⓘ |
| associatedWith |
U.S. nuclear weapons development
ⓘ
environmental contamination at Hanford Site ⓘ |
| category | nuclear weapons infrastructure of the United States ⓘ |
| commissioned | 1944 ⓘ |
| constructionStartDate | 1943 ⓘ |
| coolant | water ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| currentStatus | decommissioned ⓘ |
| currentUse | inactive industrial facility ⓘ |
| designedFor | high-volume plutonium production ⓘ |
| followedBy | D Reactor ⓘ |
| heritageStatus | part of Hanford Site historic nuclear facilities ⓘ |
| historicalPeriod |
Cold War
ⓘ
World War II ⓘ |
| locatedIn |
Benton County, Washington
ⓘ
Washington ⓘ
surface form:
Washington (state)
|
| locatedOn | Columbia River ⓘ |
| location |
Hanford Site, Washington
ⓘ
surface form:
Hanford Site
|
| managedBy | U.S. Department of Energy ⓘ |
| moderator | graphite ⓘ |
| operator |
DuPont
ⓘ
General Electric ⓘ
surface form:
General Electric Company
United States Atomic Energy Commission ⓘ
surface form:
U.S. Atomic Energy Commission
|
| ownedBy | United States government ⓘ |
| partOf |
Hanford Site, Washington
ⓘ
surface form:
Hanford plutonium production complex
Manhattan Project ⓘ U.S. Cold War nuclear weapons program ⓘ |
| permanentShutdown | 1969 ⓘ |
| precededBy | B Reactor ⓘ |
| primaryFuel | natural uranium ⓘ |
| purpose | plutonium production for nuclear weapons ⓘ |
| reactorType | single-pass, once-through, water-cooled reactor ⓘ |
| safetyFeatures | early-generation reactor safety design ⓘ |
| shutdownDate | 1969 ⓘ |
| significance | one of the early large-scale plutonium production reactors in the world ⓘ |
| startOfOperations | 1944 ⓘ |
| startOfPlutoniumProduction | 1944 ⓘ |
| technologyLineage | graphite-moderated plutonium production reactors developed during the Manhattan Project ⓘ |
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: C Reactor Description of subject: C Reactor is one of the early plutonium production reactors built and operated at the Hanford Site in Washington as part of the U.S. Manhattan Project and Cold War 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