IBR-2 reactor
E825414
The IBR-2 reactor is a fast pulsed research nuclear reactor used primarily for neutron scattering experiments in condensed matter physics and materials science.
All labels observed (1)
| Label | Occurrences |
|---|---|
| IBR-2 reactor canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9843145 — 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: IBR-2 reactor Context triple: [Joint Institute for Nuclear Research, hasResearchFacility, IBR-2 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.
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B.
DIDO research reactor
The DIDO research reactor was a high-flux materials testing and research reactor in the UK, used primarily for nuclear materials irradiation and scientific experiments.
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C.
GLEEP research reactor
The GLEEP research reactor was the United Kingdom’s first nuclear reactor, a low-power graphite-moderated facility used primarily for research and materials testing at Harwell.
-
D.
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.
-
E.
LIDO research reactor
The LIDO research reactor was a small pool-type nuclear reactor used at the Atomic Energy Research Establishment in Harwell for research, training, and reactor physics 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: IBR-2 reactor Target entity description: The IBR-2 reactor is a fast pulsed research nuclear reactor used primarily for neutron scattering experiments in condensed matter physics and materials science.
-
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.
DIDO research reactor
The DIDO research reactor was a high-flux materials testing and research reactor in the UK, used primarily for nuclear materials irradiation and scientific experiments.
-
C.
GLEEP research reactor
The GLEEP research reactor was the United Kingdom’s first nuclear reactor, a low-power graphite-moderated facility used primarily for research and materials testing at Harwell.
-
D.
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.
-
E.
LIDO research reactor
The LIDO research reactor was a small pool-type nuclear reactor used at the Atomic Energy Research Establishment in Harwell for research, training, and reactor physics experiments.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
fast neutron reactor
ⓘ
neutron source ⓘ pulsed research nuclear reactor ⓘ research infrastructure ⓘ |
| collaboratesWith | European and international neutron centers ⓘ |
| commissioned | 1984 ⓘ |
| constructionStart | 1970s ⓘ |
| coolant | water ⓘ |
| country | Russia ⓘ |
| designedFor | time-of-flight neutron spectroscopy ⓘ |
| fuelType | highly enriched uranium ⓘ |
| hasFacility | multiple neutron scattering instruments ⓘ |
| locatedIn |
Dubna
ⓘ
Joint Institute for Nuclear Research ⓘ Russia ⓘ |
| moderator | no moderator in core ⓘ |
| modernization | underwent major modernization in 2000s ⓘ |
| namedAfter | impulse fast reactor (Russian abbreviation IBR) ⓘ |
| neutronGuideSystem | cold and thermal neutron guides to experimental halls ⓘ |
| neutronSourceType | pulsed reactor source ⓘ |
| neutronSpectrum | fast ⓘ |
| operatedBy | Joint Institute for Nuclear Research ⓘ |
| partOf |
Frank Laboratory of Neutron Physics
ⓘ
linked to:
Joint Institute for Nuclear Research
|
| peakPower | ~1500 MW thermal (pulse peak, order of magnitude) ⓘ |
| powerOutput | 2 MW thermal (approximate average) ⓘ |
| predecessor | IBR and IBR-30 reactors ⓘ |
| primaryUse |
condensed matter physics research
ⓘ
materials science research ⓘ neutron scattering experiments ⓘ |
| pulseRepetitionRate | 5 Hz (typical) ⓘ |
| pulseWidth | milliseconds range ⓘ |
| reactorCoreType | fast pulsed core with rotating reflector ⓘ |
| researchField |
materials engineering
ⓘ
neutron physics ⓘ solid-state physics ⓘ |
| restartedAfterModernization | 2010s ⓘ |
| safetyFeatures |
biological shielding
ⓘ
containment structures ⓘ multiple independent shutdown systems ⓘ |
| status | operational ⓘ |
| usedFor |
biological and soft matter studies
ⓘ
neutron activation analysis ⓘ neutron diffraction ⓘ neutron radiography ⓘ neutron reflectometry ⓘ residual stress analysis in engineering materials ⓘ small-angle neutron scattering ⓘ structure and dynamics of liquids and glasses ⓘ studies of magnetic materials ⓘ studies of superconductors ⓘ |
| userProgram | international user access program ⓘ |
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: IBR-2 reactor Description of subject: The IBR-2 reactor is a fast pulsed research nuclear reactor used primarily for neutron scattering experiments in condensed matter physics and materials science.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.