K-West Reactor
E9799
K-West Reactor is one of the plutonium production reactors at the Hanford Site in Washington State, historically used to support the U.S. nuclear weapons program.
All labels observed (2)
| Label | Occurrences |
|---|---|
| K-West Reactor canonical | 3 |
| B Reactor Area K-West (100-K Area) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T63453 — 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: K-West Reactor Context triple: [Hanford Site, reactor, K-West Reactor]
-
A.
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.
-
B.
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.
-
C.
Hanford Site, Washington
Hanford Site, Washington is a large decommissioned nuclear production complex along the Columbia River that was central to U.S. plutonium production during and after World War II and is now one of the nation’s most challenging environmental cleanup sites.
-
D.
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.
-
E.
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.
- 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: K-West Reactor Target entity description: K-West Reactor is one of the plutonium production reactors at the Hanford Site in Washington State, historically used to support the U.S. nuclear weapons program.
-
A.
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.
-
B.
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.
-
C.
Hanford Site, Washington
Hanford Site, Washington is a large decommissioned nuclear production complex along the Columbia River that was central to U.S. plutonium production during and after World War II and is now one of the nation’s most challenging environmental cleanup sites.
-
D.
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.
-
E.
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.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Hanford Site reactor
ⓘ
nuclear reactor ⓘ plutonium production reactor ⓘ |
| associatedWith |
Hanford environmental remediation
ⓘ
spent nuclear fuel storage ⓘ |
| category |
Cold War industrial site
ⓘ
former plutonium production facility ⓘ |
| commissioned | 1950s ⓘ |
| constructionStart | 1950s ⓘ |
| coolant | water ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| currentUse | inactive nuclear facility under cleanup ⓘ |
| designedFor | high neutron flux for plutonium production ⓘ |
| environmentalProgram |
Hanford Federal Facility Agreement and Consent Order
ⓘ
surface form:
Hanford cleanup program
|
| fuelType | natural uranium ⓘ |
| gridConnection | not primarily for electricity generation ⓘ |
| hasFacility | fuel storage basins ⓘ |
| hasRisk | radioactive contamination potential ⓘ |
| historicalUse | production of weapons-grade plutonium ⓘ |
| locatedIn |
K-West Reactor
self-linksurface differs
ⓘ
surface form:
B Reactor Area K-West (100-K Area)
Benton County, Washington ⓘ Hanford Site, Washington ⓘ
surface form:
Hanford Site
Washington ⓘ
surface form:
Washington State
|
| locatedNear | K-East Reactor ⓘ |
| locatedOn | Columbia River ⓘ |
| moderator | graphite ⓘ |
| nearbyCity |
Pasco, Washington
ⓘ
surface form:
Kennewick, Washington
Pasco, Washington ⓘ Richland, Washington ⓘ |
| operatedBy |
United States Atomic Energy Commission
ⓘ
surface form:
U.S. Atomic Energy Commission
U.S. Department of Energy ⓘ |
| ownedBy | U.S. Department of Energy ⓘ |
| partOf |
Hanford Site, Washington
ⓘ
surface form:
Hanford Site 100-K Area
Hanford production reactors ⓘ U.S. nuclear weapons complex ⓘ |
| purpose |
plutonium production
ⓘ
support U.S. nuclear weapons program ⓘ |
| reactorType |
graphite-moderated reactor
ⓘ
water-cooled reactor ⓘ |
| region | Pacific Northwest ⓘ |
| regulatoryBody |
Office of Environmental Management
ⓘ
surface form:
U.S. Department of Energy Office of Environmental Management
|
| safetyFeature |
concrete biological shield
ⓘ
reactor confinement structure ⓘ |
| status |
decommissioned
ⓘ
shutdown ⓘ |
| usedBy |
United States government
ⓘ
surface form:
U.S. government
|
| usedDuring | Cold War ⓘ |
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: K-West Reactor Description of subject: K-West Reactor is one of the plutonium production reactors at the Hanford Site in Washington State, historically used to support the U.S. nuclear weapons program.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Hanford Site
this entity surface form:
B Reactor Area K-West (100-K Area)