Unit 4 reactor building
E790757
The Unit 4 reactor building at the Fukushima Daiichi Nuclear Power Plant is a heavily damaged structure that became emblematic of the 2011 nuclear disaster following severe hydrogen explosions and subsequent radioactive releases.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
nuclear power plant unit building
ⓘ
reactor building ⓘ |
| causeOfDamage | hydrogen explosion ⓘ |
| causeOfHydrogenExplosion | hydrogen accumulation in upper part of building ⓘ |
| commissioningDate | 1978 ⓘ |
| constructionStartDate | 1974 ⓘ |
| contains |
primary containment vessel of Unit 4
ⓘ
reactor of Fukushima Daiichi Unit 4 NERFINISHED ⓘ secondary containment structure of Unit 4 ⓘ spent fuel pool of Unit 4 ⓘ |
| coolingSystem | reactor cooling systems disabled by tsunami ⓘ |
| country | Japan ⓘ |
| damageEvent |
2011 Tōhoku earthquake and tsunami
ⓘ
Fukushima Daiichi nuclear disaster NERFINISHED ⓘ hydrogen explosion at Unit 4 ⓘ |
| dateOfHydrogenExplosion | 2011-03-15 ⓘ |
| decommissioningStatus | under decommissioning ⓘ |
| designedBy | General Electric (reactor design) NERFINISHED ⓘ |
| effectOfExplosion |
destruction of outer walls and roof
ⓘ
release of radioactive materials ⓘ severe structural damage to upper floors ⓘ |
| imagery | widely published photographs showing collapsed upper structure ⓘ |
| locatedIn |
Fukushima Daiichi Nuclear Power Plant
NERFINISHED
ⓘ
Ōkuma, Fukushima Prefecture, Japan NERFINISHED ⓘ |
| longTermPlan | eventual dismantling as part of Fukushima Daiichi site decommissioning ⓘ |
| mediaCoverage | extensive international media coverage after 2011 accident ⓘ |
| notableFor |
iconic images of damage during Fukushima Daiichi nuclear disaster
ⓘ
risk associated with spent fuel pool ⓘ |
| numberOfFuelAssembliesRemoved | 1533 ⓘ |
| operator | Tokyo Electric Power Company (TEPCO) NERFINISHED ⓘ |
| ownedBy | Tokyo Electric Power Company (TEPCO) NERFINISHED ⓘ |
| partOf |
Fukushima Daiichi Nuclear Power Plant
NERFINISHED
ⓘ
Fukushima Daiichi Unit 4 NERFINISHED ⓘ |
| reactorType | boiling water reactor (BWR) ⓘ |
| regulatoryAuthority | Nuclear Regulation Authority (Japan) NERFINISHED ⓘ |
| riskConcern |
potential large radioactive release from spent fuel
ⓘ
potential loss of cooling in spent fuel pool ⓘ |
| safetyUpgradesPostAccident | structural reinforcement of spent fuel pool support ⓘ |
| seismicReinforcement | installed after 2011 accident ⓘ |
| shutdownDate | 2011-03-11 ⓘ |
| spentFuelPoolLocation | upper part of reactor building ⓘ |
| spentFuelRemovalEndDate | 2014-12-20 ⓘ |
| spentFuelRemovalStartDate | 2013-11-18 ⓘ |
| spentFuelRemovedTo | common spent fuel pool at Fukushima Daiichi ⓘ |
| status |
heavily damaged
ⓘ
permanently shut down ⓘ |
| tsunamiImpact | loss of off-site and on-site power at Fukushima Daiichi ⓘ |
| unitNumber | 4 ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.