Advanced Test Reactor
E99195
The Advanced Test Reactor is a high-flux research nuclear reactor used primarily for materials testing and irradiation experiments, located at the Idaho National Laboratory in the United States.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Advanced Test Reactor canonical | 1 |
| Advanced Test Reactor Critical Facility | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T854082 — 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: Advanced Test Reactor Context triple: [Idaho National Engineering Laboratory, hasFacility, Advanced Test Reactor]
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
N Reactor
N Reactor was a dual-purpose plutonium production and power-generating nuclear reactor at the Hanford Site in Washington, notable for its graphite-moderated, water-cooled design and role in the U.S. Cold War weapons program.
-
E.
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.
- 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: Advanced Test Reactor Target entity description: The Advanced Test Reactor is a high-flux research nuclear reactor used primarily for materials testing and irradiation experiments, located at the Idaho National Laboratory in the United States.
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
N Reactor
N Reactor was a dual-purpose plutonium production and power-generating nuclear reactor at the Hanford Site in Washington, notable for its graphite-moderated, water-cooled design and role in the U.S. Cold War weapons program.
-
E.
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.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
materials testing reactor
ⓘ
research nuclear reactor ⓘ test reactor ⓘ |
| abbreviation | ATR ⓘ |
| commissioningDate | 1967 ⓘ |
| constructionStartDate | 1961 ⓘ |
| coolant | light water ⓘ |
| coolantPressure | approximately 2.8 MPa ⓘ |
| coreShape |
four-leaf clover
ⓘ
serpentine ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| designedBy |
Idaho National Engineering Laboratory
ⓘ
surface form:
Idaho National Laboratory
|
| firstCriticalityDate | 1967 ⓘ |
| fuelType | highly enriched uranium ⓘ |
| hasFacility |
Advanced Test Reactor
self-linksurface differs
ⓘ
surface form:
Advanced Test Reactor Critical Facility
|
| hasNeutronSpectrum |
epithermal
ⓘ
fast ⓘ thermal ⓘ |
| locatedIn |
Idaho Falls, Idaho area
ⓘ
surface form:
Idaho Falls, Idaho
|
| location |
Idaho National Engineering Laboratory
ⓘ
surface form:
Idaho National Laboratory
|
| managedBy | Battelle Energy Alliance ⓘ |
| moderator | light water ⓘ |
| neutronFlux | high-flux ⓘ |
| notableFeature |
multiple independent flux traps and irradiation positions
ⓘ
very high neutron flux compared to power reactors ⓘ |
| operator |
Idaho National Engineering Laboratory
ⓘ
surface form:
Idaho National Laboratory
|
| owner |
U.S. Department of Energy
ⓘ
surface form:
United States Department of Energy
|
| partOf | United States Department of Energy nuclear research infrastructure ⓘ |
| primaryUse |
irradiation experiments
ⓘ
materials testing ⓘ neutron irradiation of fuels and materials ⓘ |
| produces |
medical isotopes
ⓘ
radioisotopes ⓘ |
| reactorType |
light water reactor
ⓘ
pressurized water reactor ⓘ |
| regulatoryBody |
U.S. Nuclear Regulatory Commission
ⓘ
surface form:
United States Nuclear Regulatory Commission
|
| researchField |
nuclear materials
ⓘ
radiation effects on materials ⓘ reactor fuels ⓘ |
| safetyFeature |
multiple redundant shutdown systems
ⓘ
pressurized water containment systems ⓘ |
| status | operational ⓘ |
| supportsProgram |
isotope production
ⓘ
naval nuclear propulsion materials testing ⓘ space nuclear power materials testing ⓘ |
| thermalPower | 250 MWth ⓘ |
| usedBy |
government researchers
ⓘ
industry researchers ⓘ university researchers ⓘ |
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: Advanced Test Reactor Description of subject: The Advanced Test Reactor is a high-flux research nuclear reactor used primarily for materials testing and irradiation experiments, located at the Idaho National Laboratory in the United States.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Advanced Test Reactor Critical Facility