accident at tepco’s fukushima‐daiichi npp current status, lessons learned, and the future of...

Download Accident at TEPCO’s Fukushima‐Daiichi NPP  Current status, lessons learned, and  the future of nuclear energy policy in Japan  Accident at TEPCO’s Fukushima‐Daiichi NPP  Fukushima‐Daini‐1  Fukushima‐Daiichi‐4  Akira OMOTO  Commissioner, Atomic Energy Commission

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Accident at TEPCO’s Fukushima‐Daiichi NPPCurrent status, lessons learned, andthe future of nuclear energy policy in JapanAccident at TEPCO’s Fukushima‐Daiichi NPPFukushima‐Daini‐1Fukushima‐Daiichi‐4Akira OMOTOCommissioner, Atomic Energy Commission

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AccidentatTEPCOsFukushimaDaiichiNPPCurrent status, lessons learned and status learned, the future of nuclear energy policy in Japan

AccidentatTEPCOsFukushimaDaiichiNPP

FukushimaDaini1

FukushimaDaiichi4

Akira OMOTO Aki Commissioner, Atomic Energy Commission

Outline Currentstatus KeyLessonsLearned FutureofNEpolicyinJAPAN

2

Onsitestatusandmedium &longtermplan Stabilizationphaseendedin2011December Pl Plannedactions d i 1.RemoveSpentFuelfromtheSpentFuelPools(startwithin2years) 2.Removecoredebris(startwithin10years) ( y ) 3.Decommission Container 4.Disposegenerated wastesatfinaldisposalfacilities Overhead crane Key technology challenges Keytechnologychallenges Identifylocationandconfiguration Work platform ofcoredebris DS pit Spent Plugtheleakingholes Fuel pool Expansion Removecoredebris Transfer Debris storage drum pipeDebris t D b i storage drum (temporary) Camera, cutting, digging, gripping and suction equipment

Torus room

3

Maintaindebriscooling/Assurereliablecooling Waterinventorycontrol W t i t t l700Ton/DayR/B Tb/B RW/B

Oilseparator(Toshiba)

Storage tanks Recycle

Csremoval Kurion Toshiba/WH(Sarry) Areva

ROandevaporation ( (Hitachi) )

Storage tanks

1200Ton/Day

HLW

4

ReactorBuildingCoverCompleted for Unit 1 (2011 October)

5

Offsiteimpact: evacuation,landcontaminationandexposure evacuation land contamination and exposure1) Evacuee:Estimated146,520(NAIICreport) 2) Landcontamination,currentzoninganddecontamination activities 3)Estimatedradiationexposure: Evaluationofexternalexposureofresidents(evacuees),March12July11: 2012Feb20reportbyFukushimaPrefecture 2012Feb20 report by Fukushima Prefecture 58%

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