Rolls-Royce PWR2 nuclear reactor
E345097
The Rolls-Royce PWR2 is a British-designed pressurized water nuclear reactor used to provide long-endurance, high-power propulsion for the Royal Navy’s nuclear submarines.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Rolls-Royce PWR2 nuclear reactor canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T3291706 — 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: Rolls-Royce PWR2 nuclear reactor Context triple: [Astute-class submarine, propulsionSystem, Rolls-Royce PWR2 nuclear 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.
NRU reactor
The NRU reactor was a Canadian research nuclear reactor at Chalk River Laboratories known for producing medical isotopes and supporting materials testing and reactor physics research.
-
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: Rolls-Royce PWR2 nuclear reactor Target entity description: The Rolls-Royce PWR2 is a British-designed pressurized water nuclear reactor used to provide long-endurance, high-power propulsion for the Royal Navy’s nuclear submarines.
-
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.
NRU reactor
The NRU reactor was a Canadian research nuclear reactor at Chalk River Laboratories known for producing medical isotopes and supporting materials testing and reactor physics research.
-
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 |
naval nuclear reactor
ⓘ
pressurized water reactor ⓘ |
| application | marine propulsion ⓘ |
| associatedCompany | BAE Systems Submarines ⓘ |
| belongsToProgram | UK nuclear submarine program ⓘ |
| coolant | light water ⓘ |
| countryOfOrigin | United Kingdom ⓘ |
| customer |
United Kingdom Ministry of Defence
ⓘ
surface form:
UK Ministry of Defence
|
| designedFor |
extended core life
ⓘ
high-power propulsion ⓘ long-endurance underwater operation ⓘ reduced refuelling frequency ⓘ stealthy underwater operation ⓘ |
| designer |
Rolls-Royce plc
ⓘ
surface form:
Rolls-Royce
|
| employs | pressurized primary coolant loop ⓘ |
| energyConversion | thermal energy to mechanical energy ⓘ |
| energySource | nuclear fission ⓘ |
| followedBy | Rolls-Royce PWR3 ⓘ |
| fuelType | enriched uranium ⓘ |
| heatTransferMedium | pressurized water ⓘ |
| industry |
nuclear engineering
ⓘ
shipbuilding ⓘ |
| intendedFor | nuclear-powered submarines ⓘ |
| locationOfDesign |
Derby
ⓘ
England ⓘ |
| manufacturer |
Rolls-Royce plc
ⓘ
surface form:
Rolls-Royce
|
| moderator | light water ⓘ |
| operator | Royal Navy ⓘ |
| powerConversion | steam turbine propulsion ⓘ |
| precededBy | Rolls-Royce PWR1 ⓘ |
| primaryUse | submarine propulsion ⓘ |
| propulsionType | nuclear marine propulsion ⓘ |
| reactorCoolantSystem | pressurized water primary circuit ⓘ |
| reactorGeneration | second generation Rolls-Royce naval PWR ⓘ |
| reactorType | pressurized water reactor ⓘ |
| safetyFeature | multiple redundant safety systems ⓘ |
| sector |
defence
ⓘ
naval propulsion ⓘ |
| serviceBranch | Royal Navy Submarine Service ⓘ |
| status | in service ⓘ |
| usedBy | Royal Navy ⓘ |
| usedInConflict | Cold War ⓘ |
| usedInRole |
attack submarines
ⓘ
strategic deterrent submarines ⓘ |
| usedOnPlatform |
Astute-class submarine
ⓘ
Vanguard-class submarine ⓘ |
| usedOnVesselType |
ballistic missile submarine
ⓘ
fleet submarine ⓘ |
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: Rolls-Royce PWR2 nuclear reactor Description of subject: The Rolls-Royce PWR2 is a British-designed pressurized water nuclear reactor used to provide long-endurance, high-power propulsion for the Royal Navy’s nuclear submarines.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.