Chicago Pile-2
E88301
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Chicago Pile-2 canonical | 2 |
| Manhattan Project reactor | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T719348 — 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: Chicago Pile-2 Context triple: [Chicago Pile-1, successor, Chicago Pile-2]
-
A.
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.
-
B.
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.
-
C.
K-25 Project
The K-25 Project was a World War II–era Manhattan Project effort to build and operate a massive gaseous diffusion plant for uranium enrichment in Oak Ridge, Tennessee.
-
D.
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.
-
E.
Trinity test device
The Trinity test device was the first nuclear explosive ever detonated, a plutonium-based implosion bomb tested by the Manhattan Project in July 1945.
- 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: Chicago Pile-2 Target entity description: 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.
-
A.
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.
-
B.
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.
-
C.
K-25 Project
The K-25 Project was a World War II–era Manhattan Project effort to build and operate a massive gaseous diffusion plant for uranium enrichment in Oak Ridge, Tennessee.
-
D.
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.
-
E.
Trinity test device
The Trinity test device was the first nuclear explosive ever detonated, a plutonium-based implosion bomb tested by the Manhattan Project in July 1945.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
air-cooled reactor
ⓘ
early nuclear reactor ⓘ graphite-moderated reactor ⓘ research nuclear reactor ⓘ |
| builtFromComponentsOf | Chicago Pile-1 ⓘ |
| category |
Experimental nuclear reactor
ⓘ
Manhattan Project reactor ⓘ
linked to:
Chicago Pile-2
|
| constructionStart | 1943 ⓘ |
| coolant | air ⓘ |
| coolingMethod | natural convection air cooling ⓘ |
| coreMaterial | graphite blocks ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| decommissioning | 1954 ⓘ |
| designedBy |
Enrico Fermi
ⓘ
Walter Zinn ⓘ |
| firstCriticality |
1943
ⓘ
March 1943 ⓘ |
| fuel |
natural uranium
ⓘ
uranium metal ⓘ |
| fuelForm | uranium lumps ⓘ |
| location |
Argonne site
ⓘ
linked to:
Argonne National Laboratory
Chicago, Illinois ⓘ
linked to:
Chicago, Illinois, United States
|
| managedBy |
Metallurgical Laboratory
ⓘ
linked to:
Chicago Metallurgical Laboratory
|
| moderator | graphite ⓘ |
| notableFor | continuing experiments after first controlled chain reaction ⓘ |
| operator | Argonne National Laboratory ⓘ |
| ownership | United States government ⓘ |
| partOf | early Argonne reactor program ⓘ |
| predecessor | Chicago Pile-1 ⓘ |
| project | Manhattan Project ⓘ |
| purpose |
neutron physics experiments
ⓘ
nuclear research ⓘ reactor development experiments ⓘ |
| researchField |
neutron moderation
ⓘ
nuclear chain reactions ⓘ reactor physics ⓘ |
| safetyFeature |
control rods
ⓘ
neutron-absorbing materials ⓘ |
| shutdown | 1954 ⓘ |
| status | decommissioned ⓘ |
| successor | Chicago Pile-3 ⓘ |
| thermalPower | 10 kilowatts ⓘ |
| usedFor |
measuring neutron cross sections
ⓘ
testing reactor components ⓘ training nuclear scientists ⓘ |
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: Chicago Pile-2 Description of subject: 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.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Chicago Pile-2