DR Reactor
E226938
Hanford Site reactor
graphite-moderated reactor
nuclear reactor
plutonium production reactor
water-cooled reactor
The DR Reactor was one of the plutonium-producing nuclear reactors at the Hanford Site, built during the Manhattan Project era to support U.S. nuclear weapons production.
All labels observed (1)
| Label | Occurrences |
|---|---|
| DR Reactor canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2030081 — 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: DR Reactor Context triple: [Hanford production reactors, hasPart, DR Reactor]
-
A.
R Reactor
R Reactor was one of the plutonium and tritium production nuclear reactors that operated at the U.S. Department of Energy’s Savannah River Site during the Cold War.
-
B.
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.
-
C.
L Reactor
L Reactor was a heavy water–moderated nuclear production reactor at the Savannah River Site in South Carolina, historically used to produce materials such as plutonium and tritium for the U.S. nuclear weapons program.
-
D.
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.
-
E.
P Reactor
P Reactor was a plutonium and tritium production nuclear reactor at the U.S. Department of Energy’s Savannah River Site in South Carolina, built during the Cold War to support the nation’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: DR Reactor Target entity description: The DR Reactor was one of the plutonium-producing nuclear reactors at the Hanford Site, built during the Manhattan Project era to support U.S. nuclear weapons production.
-
A.
R Reactor
R Reactor was one of the plutonium and tritium production nuclear reactors that operated at the U.S. Department of Energy’s Savannah River Site during the Cold War.
-
B.
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.
-
C.
L Reactor
L Reactor was a heavy water–moderated nuclear production reactor at the Savannah River Site in South Carolina, historically used to produce materials such as plutonium and tritium for the U.S. nuclear weapons program.
-
D.
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.
-
E.
P Reactor
P Reactor was a plutonium and tritium production nuclear reactor at the U.S. Department of Energy’s Savannah River Site in South Carolina, built during the Cold War to support the nation’s nuclear weapons program.
- F. None of above. chosen
Statements (37)
| Predicate | Object |
|---|---|
| instanceOf |
Hanford Site reactor
ⓘ
graphite-moderated reactor ⓘ nuclear reactor ⓘ plutonium production reactor ⓘ water-cooled reactor ⓘ |
| associatedWith |
Cold War plutonium production
ⓘ
Hanford Site cleanup program ⓘ Hanford plutonium production mission ⓘ |
| category |
Manhattan Project sites
ⓘ
surface form:
Manhattan Project infrastructure
Nuclear technology in Washington State ⓘ Nuclear weapons infrastructure of the United States ⓘ |
| constructedDuring | World War II ⓘ |
| coolant | water ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| fuelType | natural uranium ⓘ |
| governedBy | U.S. national security policy ⓘ |
| hasEnvironmentalImpact | radioactive waste generation ⓘ |
| hasFunction | irradiate uranium fuel to produce plutonium ⓘ |
| historicalPeriod |
Manhattan Project
ⓘ
surface form:
Manhattan Project era
|
| locatedIn |
Benton County, Washington
ⓘ
Hanford Reach area of the Columbia River ⓘ
surface form:
Columbia River shoreline
Hanford Site, Washington ⓘ
surface form:
Hanford Site
Washington ⓘ
surface form:
Washington State
|
| moderator | graphite ⓘ |
| namedAfter | D Reactor (as a replacement or companion unit) ⓘ |
| operatedBy |
United States Atomic Energy Commission
ⓘ
surface form:
U.S. Atomic Energy Commission
Energy Research and Development Administration ⓘ
surface form:
U.S. Department of Energy predecessor agencies
|
| partOf |
Hanford production reactors
ⓘ
surface form:
Hanford production reactor complex
Manhattan Project ⓘ U.S. nuclear weapons program ⓘ |
| purpose |
plutonium production
ⓘ
support U.S. nuclear weapons production ⓘ |
| regulatoryAuthority |
United States government
ⓘ
surface form:
U.S. federal government
|
| safetyConcern | radioactive contamination risk ⓘ |
| sitedNear | Columbia River ⓘ |
| technologyType | early-generation production reactor ⓘ |
| usedFor | production of plutonium for nuclear weapons cores ⓘ |
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: DR Reactor Description of subject: The DR Reactor was one of the plutonium-producing nuclear reactors at the Hanford Site, built during the Manhattan Project era to support U.S. nuclear weapons production.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.