N Reactor
E9800
dual-purpose reactor
graphite-moderated reactor
nuclear reactor
plutonium production reactor
power reactor
water-cooled reactor
N Reactor was a dual-purpose plutonium production and power-generating nuclear reactor at the Hanford Site in Washington, notable for its graphite-moderated, water-cooled design and role in the U.S. Cold War weapons program.
All labels observed (1)
| Label | Occurrences |
|---|---|
| N Reactor canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T63454 — 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: N Reactor Context triple: [Hanford Site, reactor, N Reactor]
-
A.
H 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.
-
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.
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.
-
E.
K-East Reactor
K-East Reactor was one of the plutonium production reactors at the Hanford Site in Washington State, built during the Cold War 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: N Reactor Target entity description: N Reactor was a dual-purpose plutonium production and power-generating nuclear reactor at the Hanford Site in Washington, notable for its graphite-moderated, water-cooled design and role in the U.S. Cold War weapons program.
-
A.
H 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.
-
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.
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.
-
E.
K-East Reactor
K-East Reactor was one of the plutonium production reactors at the Hanford Site in Washington State, built during the Cold War to support the U.S. nuclear weapons program.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
dual-purpose reactor
ⓘ
graphite-moderated reactor ⓘ nuclear reactor ⓘ plutonium production reactor ⓘ power reactor ⓘ water-cooled reactor ⓘ |
| associatedProgram |
U.S. nuclear weapons program
ⓘ
civilian nuclear power program ⓘ |
| commercialOperationStartDate | mid-1960s ⓘ |
| commissioningDate | 1963 ⓘ |
| connectedTo |
Hanford Site, Washington
ⓘ
surface form:
Hanford Generating Plant
|
| constructionStartDate | 1959 ⓘ |
| coolant | water ⓘ |
| coolingSource | Columbia River water ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| designFeature |
dual-purpose design for plutonium and power
ⓘ
graphite moderator blocks ⓘ horizontal fuel channels ⓘ on-line refueling capability ⓘ pressurized water cooling channels ⓘ |
| environmentalIssue | radioactive contamination at Hanford Site ⓘ |
| firstCriticalityDate | 1963 ⓘ |
| fuel | uranium ⓘ |
| fuelType | metallic uranium ⓘ |
| historicalPeriod | Cold War ⓘ |
| locatedIn |
Columbia River
ⓘ
Hanford Site, Washington ⓘ
surface form:
Hanford Site
Washington ⓘ
surface form:
Washington state
|
| moderator | graphite ⓘ |
| notableFor |
being the only dual-purpose reactor in the U.S. that produced both plutonium and electricity
ⓘ
graphite-moderated, water-cooled design ⓘ role in U.S. nuclear weapons material production ⓘ |
| operator |
United States Atomic Energy Commission
ⓘ
surface form:
U.S. Atomic Energy Commission
U.S. Department of Energy ⓘ |
| ownedBy |
United States government
ⓘ
surface form:
U.S. federal government
|
| partOf |
Hanford Site, Washington
ⓘ
surface form:
Hanford plutonium production complex
|
| powerOutputElectrical | approximately 860 MWe ⓘ |
| powerOutputThermal | approximately 4000 MWt ⓘ |
| purpose |
electricity generation
ⓘ
plutonium production ⓘ steam generation ⓘ |
| regulatoryBody | U.S. Nuclear Regulatory Commission ⓘ |
| safetyConcern |
cooling system reliability
ⓘ
graphite fire risk ⓘ |
| shutdownDate | 1987 ⓘ |
| status |
permanently shut down
ⓘ
under decommissioning ⓘ |
| usedFor |
U.S. Cold War nuclear weapons program
ⓘ
civilian power generation ⓘ |
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: N Reactor Description of subject: N Reactor was a dual-purpose plutonium production and power-generating nuclear reactor at the Hanford Site in Washington, notable for its graphite-moderated, water-cooled design and role in the U.S. Cold War weapons program.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Hanford Site