Experimental Breeder Reactor I
E104432
Experimental Breeder Reactor I was the world’s first nuclear reactor to produce usable electricity, marking a major milestone in nuclear power development.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Experimental Breeder Reactor I canonical | 4 |
| Experimental Breeder Reactor I National Historic Landmark | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T854080 — 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: Experimental Breeder Reactor I Context triple: [Idaho National Engineering Laboratory, hasFacility, Experimental Breeder Reactor I]
-
A.
X-10 graphite reactor
The X-10 graphite reactor was an early nuclear reactor at Oak Ridge, Tennessee, built during the Manhattan Project as a pilot plant for plutonium production and a key step toward the development of nuclear weapons and nuclear energy.
-
B.
Chicago Pile-2
Chicago Pile-2 was an early research nuclear reactor built at the Argonne site to continue and expand experimental work following the first controlled chain reaction achieved by Chicago Pile-1.
-
C.
Chicago Pile-1
Chicago Pile-1 was the world’s first artificial nuclear reactor, achieving the first controlled, self-sustaining nuclear chain reaction in 1942 under the leadership of Enrico Fermi.
-
D.
TRIGA research reactor
The TRIGA research reactor is a small, inherently safe nuclear reactor design widely used in universities and research institutions for education, training, and scientific experiments.
-
E.
K-West Reactor
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.
- 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: Experimental Breeder Reactor I Target entity description: Experimental Breeder Reactor I was the world’s first nuclear reactor to produce usable electricity, marking a major milestone in nuclear power development.
-
A.
X-10 graphite reactor
The X-10 graphite reactor was an early nuclear reactor at Oak Ridge, Tennessee, built during the Manhattan Project as a pilot plant for plutonium production and a key step toward the development of nuclear weapons and nuclear energy.
-
B.
Chicago Pile-2
Chicago Pile-2 was an early research nuclear reactor built at the Argonne site to continue and expand experimental work following the first controlled chain reaction achieved by Chicago Pile-1.
-
C.
Chicago Pile-1
Chicago Pile-1 was the world’s first artificial nuclear reactor, achieving the first controlled, self-sustaining nuclear chain reaction in 1942 under the leadership of Enrico Fermi.
-
D.
TRIGA research reactor
The TRIGA research reactor is a small, inherently safe nuclear reactor design widely used in universities and research institutions for education, training, and scientific experiments.
-
E.
K-West Reactor
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.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
breeder reactor
ⓘ
nuclear reactor ⓘ research reactor ⓘ |
| alsoKnownAs | EBR-I ⓘ |
| constructionStart | 1949 ⓘ |
| continent | North America ⓘ |
| coolant |
liquid metal
ⓘ
sodium-potassium alloy ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| dateOfFirstCriticality | 1951-12-20 ⓘ |
| decommissioned | 1964 ⓘ |
| designedBy | Walter Zinn ⓘ |
| endOfOperation | 1964 ⓘ |
| fuelType | uranium ⓘ |
| governingLaw |
U.S. Atomic Energy Act
ⓘ
linked to:
Atomic Energy Act of 1954
|
| gridConnection | 1951-12-20 ⓘ |
| hasExhibit |
control room
ⓘ
reactor core ⓘ turbine-generator equipment ⓘ |
| heritageDesignation |
National Historic Landmark
ⓘ
National Historic Mechanical Engineering Landmark ⓘ Nuclear Historic Landmark ⓘ |
| heritageDesignationDate | 1965 ⓘ |
| innovationType | prototype power reactor ⓘ |
| locatedIn |
Idaho
ⓘ
Idaho National Laboratory site ⓘ
linked to:
Idaho National Engineering Laboratory
|
| near | Arco, Idaho ⓘ |
| notableFor |
demonstration of breeder reactor concept
ⓘ
first nuclear reactor to produce usable electricity ⓘ |
| operatedBy | United States Atomic Energy Commission ⓘ |
| operationalUse |
reactor physics experiments
ⓘ
training ⓘ |
| ownedBy | United States government ⓘ |
| partOf | Idaho National Engineering Laboratory ⓘ |
| powerOutputElectrical | about 200 kilowatts ⓘ |
| powerOutputThermal | about 1.4 megawatts ⓘ |
| producedElectricityFor | four 200-watt light bulbs ⓘ |
| purpose |
experimental power reactor
ⓘ
research and development of breeder technology ⓘ |
| reactorType | fast breeder reactor ⓘ |
| safetyEvent | partial core meltdown in 1955 ⓘ |
| startOfOperation | 1951 ⓘ |
| status |
decommissioned
ⓘ
museum ⓘ |
| successor | Experimental Breeder Reactor II ⓘ |
| technologyDomain | nuclear power ⓘ |
| touristAttraction | yes ⓘ |
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: Experimental Breeder Reactor I Description of subject: Experimental Breeder Reactor I was the world’s first nuclear reactor to produce usable electricity, marking a major milestone in nuclear power development.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Experimental Breeder Reactor I