B Reactor
E5892
graphite-moderated reactor
historical industrial facility
nuclear reactor
plutonium production reactor
water-cooled 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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| B Reactor canonical | 6 |
| B Reactor National Historic Landmark | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T63446 — 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: B Reactor Context triple: [Hanford Site, reactor, B Reactor]
-
A.
Bolt Beranek and Newman
Bolt Beranek and Newman was a pioneering American research and engineering firm best known for its foundational role in developing the ARPANET, a precursor to the modern internet.
-
B.
Blitz
The Blitz was the sustained German bombing campaign against the United Kingdom, particularly London, during 1940–1941 in World War II.
-
C.
Armor Branch
The Armor Branch is the United States Army’s combat arms branch responsible for armored and cavalry forces, specializing in tank and mechanized warfare.
-
D.
The Hub
The Hub is a well-known nickname for Boston, Massachusetts, reflecting its historical role as a central cultural, intellectual, and political center in the United States.
-
E.
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."
- 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: B Reactor Target entity description: B Reactor is the world’s first full-scale plutonium production reactor, built during the Manhattan Project at the Hanford Site in Washington State.
-
A.
Bolt Beranek and Newman
Bolt Beranek and Newman was a pioneering American research and engineering firm best known for its foundational role in developing the ARPANET, a precursor to the modern internet.
-
B.
Blitz
The Blitz was the sustained German bombing campaign against the United Kingdom, particularly London, during 1940–1941 in World War II.
-
C.
Armor Branch
The Armor Branch is the United States Army’s combat arms branch responsible for armored and cavalry forces, specializing in tank and mechanized warfare.
-
D.
The Hub
The Hub is a well-known nickname for Boston, Massachusetts, reflecting its historical role as a central cultural, intellectual, and political center in the United States.
-
E.
Autoport
Autoport is a specialized automotive terminal within the Port of Boston used for handling, storing, and processing imported and exported vehicles.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
graphite-moderated reactor
ⓘ
historical industrial facility ⓘ nuclear reactor ⓘ plutonium production reactor ⓘ water-cooled reactor ⓘ |
| architecturalStyle | industrial ⓘ |
| associatedWithEvent |
Manhattan Project
ⓘ
World War II ⓘ |
| associatedWithProgram | U.S. nuclear weapons program ⓘ |
| builtBy | DuPont ⓘ |
| commissioningDate | 1944-09-26 ⓘ |
| completionDate | 1944 ⓘ |
| constructionStartDate | 1943 ⓘ |
| controlMechanism | control rods ⓘ |
| coolant | light water ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| designedFor | plutonium production ⓘ |
| designPowerOutput | approximately 250 megawatts thermal ⓘ |
| firstCriticalityDate | 1944-09-26 ⓘ |
| fuelType | natural uranium ⓘ |
| hasHeritageDesignation |
Manhattan Project National Historical Park (Los Alamos unit)
ⓘ
surface form:
Manhattan Project National Historical Park
|
| historicalUse | production of plutonium-239 ⓘ |
| listedIn | National Register of Historic Places ⓘ |
| locatedIn |
Benton County, Washington
ⓘ
Hanford Site, Washington ⓘ
surface form:
Hanford Site
United States of America ⓘ
surface form:
United States
Washington ⓘ
surface form:
Washington State
|
| managedBy | U.S. Department of Energy ⓘ |
| moderator | graphite ⓘ |
| nationalHistoricLandmarkDesignationDate | 2008 ⓘ |
| NRHPType | National Historic Landmark ⓘ |
| numberOfTubes | 2004 process tubes ⓘ |
| openToPublic | yes ⓘ |
| operatedBy | DuPont ⓘ |
| ownedBy | United States government ⓘ |
| partOf |
Hanford Site, Washington
ⓘ
surface form:
Hanford Engineer Works
Manhattan Project ⓘ Manhattan Project National Historical Park (Los Alamos unit) ⓘ
surface form:
Manhattan Project National Historical Park
|
| producedPlutoniumFor |
Fat Man
ⓘ
surface form:
Fat Man nuclear bomb
Trinity test device ⓘ World War II U.S. nuclear weapons program ⓘ |
| reactorType |
graphite-moderated, water-cooled reactor
ⓘ
production reactor ⓘ |
| recognizedAs | National Historic Landmark ⓘ |
| shutdownDate | 1968-02-12 ⓘ |
| status |
decommissioned
ⓘ
museum ⓘ |
| tourOperator | U.S. Department of Energy ⓘ |
| worldRanking | first full-scale plutonium production reactor ⓘ |
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: B Reactor Description of subject: B Reactor is the world’s first full-scale plutonium production reactor, built during the Manhattan Project at the Hanford Site in Washington State.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Hanford Site
subject surface form:
Hanford Site
this entity surface form:
B Reactor National Historic Landmark