ZEEP reactor
E290830
The ZEEP reactor was a small Canadian research nuclear reactor that played a key role in early nuclear physics experiments and the development of Canada's nuclear energy program.
All labels observed (1)
| Label | Occurrences |
|---|---|
| ZEEP reactor canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2702437 — 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: ZEEP reactor Context triple: [Chalk River Laboratories, hasPart, ZEEP reactor]
-
A.
S2W nuclear reactor
The S2W nuclear reactor was an early U.S. Navy pressurized water reactor design that powered the world’s first operational nuclear-powered submarine, USS Nautilus.
-
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-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.
-
D.
K Reactor
K Reactor is a decommissioned nuclear production reactor at the Savannah River Site in South Carolina that was used primarily for producing weapons-grade materials during the Cold War.
-
E.
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.
- 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: ZEEP reactor Target entity description: The ZEEP reactor was a small Canadian research nuclear reactor that played a key role in early nuclear physics experiments and the development of Canada's nuclear energy program.
-
A.
S2W nuclear reactor
The S2W nuclear reactor was an early U.S. Navy pressurized water reactor design that powered the world’s first operational nuclear-powered submarine, USS Nautilus.
-
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-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.
-
D.
K Reactor
K Reactor is a decommissioned nuclear production reactor at the Savannah River Site in South Carolina that was used primarily for producing weapons-grade materials during the Cold War.
-
E.
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.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
experimental reactor
ⓘ
nuclear research reactor ⓘ |
| builtBy |
National Research Council Canada
ⓘ
surface form:
National Research Council of Canada
|
| commissioned | September 1945 ⓘ |
| constructionStart | 1944 ⓘ |
| contributedTo |
Canadian nuclear energy program
ⓘ
development of CANDU reactor technology ⓘ |
| controlRodMaterial | cadmium ⓘ |
| coolant | heavy water ⓘ |
| coolantType | D2O ⓘ |
| coolingMethod | tank-type reactor ⓘ |
| country | Canada ⓘ |
| decommissioned | 1970 ⓘ |
| designedFor |
neutron physics experiments
ⓘ
reactor physics research ⓘ |
| firstCriticalityDate | September 5, 1945 ⓘ |
| fuelEnrichment | natural (unenriched) uranium ⓘ |
| fuelForm | metallic uranium rods ⓘ |
| fuelType | natural uranium ⓘ |
| heritageDesignation | nuclear historic landmark ⓘ |
| historicalEra | early Cold War period ⓘ |
| inception | 1945 ⓘ |
| locatedIn |
Chalk River
ⓘ
surface form:
Chalk River, Ontario
Ontario ⓘ
surface form:
Ontario, Canada
|
| location | Chalk River Laboratories ⓘ |
| moderatorType | D2O ⓘ |
| neutronModerator | heavy water ⓘ |
| notableFor | early heavy-water moderated reactor experiments ⓘ |
| operator |
Atomic Energy of Canada Limited
ⓘ
National Research Council Canada ⓘ
surface form:
National Research Council of Canada
|
| ownership |
Canadian federal government (Ottawa)
ⓘ
surface form:
Government of Canada
|
| partOf | Canadian nuclear research program ⓘ |
| powerOutput | about 10 kilowatts thermal ⓘ |
| purpose | support development of Canadian nuclear power technology ⓘ |
| reactorType | thermal neutron reactor ⓘ |
| researchField |
nuclear physics
ⓘ
reactor engineering ⓘ |
| researchOutput |
neutron cross-section measurements
ⓘ
reactor lattice data ⓘ |
| safetyFeatures | control rods ⓘ |
| scale | small research reactor ⓘ |
| significance | first operational nuclear reactor outside the United States ⓘ |
| status | decommissioned ⓘ |
| successor |
NRU reactor
ⓘ
NRX reactor ⓘ |
| usedFor |
fuel lattice testing for NRU reactor
ⓘ
fuel lattice testing for NRX reactor ⓘ lattice experiments ⓘ |
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: ZEEP reactor Description of subject: The ZEEP reactor was a small Canadian research nuclear reactor that played a key role in early nuclear physics experiments and the development of Canada's nuclear energy program.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.