Fukushima Daini Nuclear Power Plant
E790334
Fukushima Daini Nuclear Power Plant is a Japanese coastal nuclear power station in Fukushima Prefecture that experienced a significant but more contained impact from the 2011 Tōhoku earthquake and tsunami than its neighboring Daiichi plant.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Fukushima Daini Nuclear Power Plant canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T9296235 — 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: Fukushima Daini Nuclear Power Plant Context triple: [Fukushima Daiichi Nuclear Power Plant, adjacentFacility, Fukushima Daini Nuclear Power Plant]
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A.
Fukushima Daiichi Unit 2
Fukushima Daiichi Unit 2 is one of the damaged reactors at Japan’s Fukushima Daiichi Nuclear Power Plant that suffered a core meltdown and severe structural failures following the 2011 earthquake and tsunami.
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B.
Kashiwazaki-Kariwa Nuclear Power Plant
The Kashiwazaki-Kariwa Nuclear Power Plant is one of the world’s largest nuclear power stations, located in Niigata Prefecture, Japan, and operated by Tokyo Electric Power Company (TEPCO).
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C.
Fukushima Daiichi Nuclear Power Plant
Fukushima Daiichi Nuclear Power Plant is a coastal Japanese nuclear power station in Ōkuma, Fukushima Prefecture, widely known as the site of the 2011 reactor meltdowns following a massive earthquake and tsunami.
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D.
Fukushima Daiichi Unit 3
Fukushima Daiichi Unit 3 is one of the damaged reactors at Japan’s Fukushima Daiichi Nuclear Power Plant, known for suffering a hydrogen explosion and core meltdown during the 2011 nuclear disaster.
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E.
Fukushima Daiichi Unit 4
Fukushima Daiichi Unit 4 is one of the reactors at Japan’s Fukushima Daiichi Nuclear Power Plant that suffered severe damage and a spent fuel pool crisis following the 2011 earthquake and tsunami.
- 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: Fukushima Daini Nuclear Power Plant Target entity description: Fukushima Daini Nuclear Power Plant is a Japanese coastal nuclear power station in Fukushima Prefecture that experienced a significant but more contained impact from the 2011 Tōhoku earthquake and tsunami than its neighboring Daiichi plant.
-
A.
Fukushima Daiichi Unit 2
Fukushima Daiichi Unit 2 is one of the damaged reactors at Japan’s Fukushima Daiichi Nuclear Power Plant that suffered a core meltdown and severe structural failures following the 2011 earthquake and tsunami.
-
B.
Kashiwazaki-Kariwa Nuclear Power Plant
The Kashiwazaki-Kariwa Nuclear Power Plant is one of the world’s largest nuclear power stations, located in Niigata Prefecture, Japan, and operated by Tokyo Electric Power Company (TEPCO).
-
C.
Fukushima Daiichi Nuclear Power Plant
Fukushima Daiichi Nuclear Power Plant is a coastal Japanese nuclear power station in Ōkuma, Fukushima Prefecture, widely known as the site of the 2011 reactor meltdowns following a massive earthquake and tsunami.
-
D.
Fukushima Daiichi Unit 3
Fukushima Daiichi Unit 3 is one of the damaged reactors at Japan’s Fukushima Daiichi Nuclear Power Plant, known for suffering a hydrogen explosion and core meltdown during the 2011 nuclear disaster.
-
E.
Fukushima Daiichi Unit 4
Fukushima Daiichi Unit 4 is one of the reactors at Japan’s Fukushima Daiichi Nuclear Power Plant that suffered severe damage and a spent fuel pool crisis following the 2011 earthquake and tsunami.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
electric power facility
ⓘ
nuclear power plant ⓘ |
| achievedColdShutdown | 2011-03-15 ⓘ |
| adjacentTo | Fukushima Daiichi Nuclear Power Plant NERFINISHED ⓘ |
| affectedByEvent | 2011 Tōhoku earthquake and tsunami NERFINISHED ⓘ |
| alsoKnownAs |
Fukushima II Nuclear Power Plant
NERFINISHED
ⓘ
Fukushima-2 Nuclear Power Plant NERFINISHED ⓘ |
| commercialOperationStartUnit1 | 1982 ⓘ |
| commercialOperationStartUnit2 | 1984 ⓘ |
| commercialOperationStartUnit3 | 1985 ⓘ |
| commercialOperationStartUnit4 | 1987 ⓘ |
| constructionStart | 1975 ⓘ |
| coolingWaterSource | Pacific Ocean NERFINISHED ⓘ |
| country | Japan ⓘ |
| dateOfEventImpact | 2011-03-11 ⓘ |
| decisionToDecommission | announced 2019 ⓘ |
| decommissioningStatus | in progress ⓘ |
| designedForSeismicSafety | yes ⓘ |
| distanceFromFukushimaDaiichi_km | about 12 ⓘ |
| evacuationZoneIncludedPlant | yes ⓘ |
| experiencedStationBlackout | partial ⓘ |
| firstReactorCommissioned | 1982 ⓘ |
| fuelType | low-enriched uranium ⓘ |
| gridConnection | Tōhoku electric grid NERFINISHED ⓘ |
| gridConnectionYearFirstUnit | 1982 ⓘ |
| hasReactorType | boiling water reactor ⓘ |
| INESRating2011Accident | Level 3 ⓘ |
| locatedIn |
Fukushima Prefecture
NERFINISHED
ⓘ
Naraha, Fukushima NERFINISHED ⓘ Tomioka, Fukushima NERFINISHED ⓘ Tōhoku region NERFINISHED ⓘ |
| locatedOn | Pacific coast of Honshu ⓘ |
| longTermStatusAfter2011 | shutdown ⓘ |
| netElectricalCapacity_MWe | 4400 ⓘ |
| notableFor | more contained impact during 2011 nuclear accident compared to Fukushima Daiichi ⓘ |
| numberOfReactors | 4 ⓘ |
| operator | Tokyo Electric Power Company NERFINISHED ⓘ |
| ownedBy | Tokyo Electric Power Company NERFINISHED ⓘ |
| primaryCoolingSystem | light water ⓘ |
| radiationReleaseToEnvironment | limited ⓘ |
| reactorGeneration | Generation II ⓘ |
| reactorScramAfterEarthquake | all 4 units ⓘ |
| reactorSupplier |
General Electric
NERFINISHED
ⓘ
Hitachi NERFINISHED ⓘ Toshiba NERFINISHED ⓘ |
| regulatoryAuthority | Nuclear Regulation Authority (Japan) NERFINISHED ⓘ |
| safetySystemsUpgradedPostAccident | yes ⓘ |
| tsunamiInundation | yes ⓘ |
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: Fukushima Daini Nuclear Power Plant Description of subject: Fukushima Daini Nuclear Power Plant is a Japanese coastal nuclear power station in Fukushima Prefecture that experienced a significant but more contained impact from the 2011 Tōhoku earthquake and tsunami than its neighboring Daiichi plant.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.