NRX reactor

E290828

nuclear reactor nuclear research reactor research reactor

The NRX reactor was an early Canadian research nuclear reactor at Chalk River that played a key role in the development of nuclear science and technology.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (3)

Label	Occurrences
NRX reactor canonical	2
NRX reactor was heavily damaged	1
NRX reactor was later repaired and returned to service	1

How this entity was disambiguated

This entity first appeared as the object of triple T2702435 — 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: NRX reactor
Context triple: [Chalk River Laboratories, hasPart, NRX reactor]

A. 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.
B. 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.
C. DR Reactor
The DR Reactor was one of the plutonium-producing nuclear reactors at the Hanford Site, built during the Manhattan Project era to support U.S. nuclear weapons production.
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. 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: NRX reactor
Target entity description: The NRX reactor was an early Canadian research nuclear reactor at Chalk River that played a key role in the development of nuclear science and technology.

A. 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.
B. 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.
C. DR Reactor
The DR Reactor was one of the plutonium-producing nuclear reactors at the Hanford Site, built during the Manhattan Project era to support U.S. nuclear weapons production.
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. 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 (46)

Predicate	Object
instanceOf	nuclear reactor ⓘ nuclear research reactor ⓘ research reactor ⓘ
accidentConsequence	contamination of reactor systems ⓘ core damage ⓘ release of radioactive material into reactor building ⓘ
accidentDate	1952 ⓘ
accidentType	power excursion ⓘ
commissioned	1947 ⓘ
coolant	light water ⓘ
country	Canada ⓘ
designedBy	British nuclear scientists ⓘ Canadian nuclear scientists ⓘ
era	early Cold War period ⓘ
firstCriticality	1947 ⓘ
fuelType	natural uranium ⓘ
gridConnection	not primarily used for electricity generation ⓘ
influenced	development of CANDU reactor technology ⓘ
locatedInFacility	Chalk River Laboratories site ⓘ linked to: Chalk River Laboratories
location	Chalk River Laboratories ⓘ Chalk River, Ontario ⓘ linked to: Chalk River
moderator	heavy water ⓘ
neutronSpectrum	thermal ⓘ
notableAccident	NRX reactor accident of 1952 ⓘ
operator	Atomic Energy of Canada Limited ⓘ National Research Council of Canada ⓘ linked to: National Research Council Canada
ownedBy	Government of Canada ⓘ linked to: Canadian federal government (Ottawa)
partOf	Chalk River nuclear site ⓘ linked to: Chalk River Laboratories early Canadian nuclear program ⓘ
primaryUse	materials testing ⓘ neutron physics experiments ⓘ nuclear research ⓘ radioisotope production ⓘ
reactorType	heavy-water moderated research reactor ⓘ tank-type research reactor ⓘ
researchOutput	contributed to fundamental neutron physics ⓘ contributed to reactor design knowledge ⓘ
shutdown	1992 ⓘ
significance	one of the most powerful research reactors of its time ⓘ played key role in development of nuclear science and technology in Canada ⓘ
startOfConstruction	1944 ⓘ
status	decommissioned ⓘ
successor	NRU reactor ⓘ
usedFor	neutron beam experiments ⓘ production of medical radioisotopes ⓘ testing of reactor materials and components ⓘ

How these facts were elicited

Referenced by (4)

Full triples — surface form annotated when it differs from this entity's canonical label.

Chalk River Laboratories → hasPart → NRX reactor ⓘ

ZEEP reactor → successor → NRX reactor ⓘ

NRX reactor accident of 1952 → impactOnReactor → NRX reactor was heavily damaged ⓘ

linked to: NRX reactor

NRX reactor accident of 1952 → impactOnReactor → NRX reactor was later repaired and returned to service ⓘ