H Reactor
E7604
graphite-moderated reactor
military nuclear facility
nuclear reactor
plutonium production reactor
water-cooled reactor
H Reactor was one of the plutonium-producing nuclear reactors at the Hanford Site in Washington, built during the Cold War as part of the U.S. nuclear weapons program.
All labels observed (1)
| Label | Occurrences |
|---|---|
| H Reactor canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T63449 — 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: H Reactor Context triple: [Hanford Site, reactor, H 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.
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.
-
C.
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.
-
D.
Blitz
The Blitz was the sustained German bombing campaign against the United Kingdom, particularly London, during 1940–1941 in World War II.
-
E.
Halogen
Halogen is a contemporary clothing and accessories brand known for offering stylish, versatile pieces often sold through retailers like Nordstrom.
- 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: H Reactor Target entity description: H Reactor was one of the plutonium-producing nuclear reactors at the Hanford Site in Washington, built during the Cold War as part of 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.
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.
-
C.
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.
-
D.
Blitz
The Blitz was the sustained German bombing campaign against the United Kingdom, particularly London, during 1940–1941 in World War II.
-
E.
Halogen
Halogen is a contemporary clothing and accessories brand known for offering stylish, versatile pieces often sold through retailers like Nordstrom.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
graphite-moderated reactor
ⓘ
military nuclear facility ⓘ nuclear reactor ⓘ plutonium production reactor ⓘ water-cooled reactor ⓘ |
| associatedProgram | U.S. nuclear deterrent ⓘ |
| associatedWith |
environmental contamination at Hanford Site
ⓘ
radioactive waste generation ⓘ |
| constructionBegan | Cold War era ⓘ |
| controlMethod | neutron-absorbing control rods ⓘ |
| coolant | water ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| designedBy | U.S. government nuclear engineers ⓘ |
| designedFor | continuous high-flux operation ⓘ |
| era | Cold War ⓘ |
| fuelForm | uranium metal slugs ⓘ |
| fuelType | natural uranium ⓘ |
| gridConnection | not primarily for electricity generation ⓘ |
| hasNearbyFacility | other Hanford production reactors ⓘ |
| hazardType | ionizing radiation ⓘ |
| heatRemovalMethod | forced-circulation water cooling ⓘ |
| historicalSignificance | Cold War plutonium production infrastructure ⓘ |
| 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 | Hanford Site contractors ⓘ |
| moderator | graphite ⓘ |
| neutronSpectrum | thermal ⓘ |
| operatedBy |
United States Atomic Energy Commission
ⓘ
surface form:
U.S. Atomic Energy Commission
U.S. Department of Energy ⓘ |
| ownedBy | United States government ⓘ |
| partOf |
Hanford Site, Washington
ⓘ
surface form:
Hanford Site production reactors
Hanford Site, Washington ⓘ
surface form:
Hanford plutonium production complex
Manhattan Project sites ⓘ
surface form:
Manhattan Project legacy facilities
U.S. nuclear weapons program ⓘ |
| purpose | plutonium production for nuclear weapons ⓘ |
| regulatoryBody | U.S. Nuclear Regulatory Commission ⓘ |
| safetySystem |
control rods
ⓘ
emergency shutdown system ⓘ |
| sitedOn | Columbia River ⓘ |
| status |
decommissioned
ⓘ
shutdown ⓘ |
| technologyLineage | early U.S. production reactor designs ⓘ |
| wasteTypeProduced |
high-level radioactive waste
ⓘ
low-level radioactive waste ⓘ transuranic waste ⓘ |
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: H Reactor Description of subject: H Reactor was one of the plutonium-producing nuclear reactors at the Hanford Site in Washington, built during the Cold War as part of the U.S. nuclear weapons program.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Hanford Site