IAEAInternational Atomic Energy Agency

Status of Fukushima Units

Miroslav Lipar7 April 2011

IAEA

Unit 1 2 3 4

Power (MWe /MWth) 460/1380 784/2381 784/2381 784/2381

Type of Reactor BWR-3 BWR-4 BWR-4 BWR-4

Status at time of EQ In service – auto shutdown In service – auto shutdown In service – auto shutdown Outage

Core and fuel integrity Damaged Severe damage Damaged No fuel in the Reactor

RPV & RCS integrity RPV temperature high but stable RPV temperature stable RPV temperature stable

Not applicable due to outage plant status

Containment integrity No information Damage suspected Damage suspected

AC PowerAC power available - power to instrumentation – Lighting to Central Control Room

AC power available – power to instrumentation – Lighting to Central Control Room

AC power available – power to instrumentation – Lighting to Central Control Room

AC power available – power to instrumentation – Lighting to Central Control Room

Building Severe damage Slight damage Severe damage Severe damage

Water level of RPV Around half of Fuel is uncovered

Around half of Fuel is uncovered

Around half of Fuel is uncovered

Not applicable due to outage plant status

Pressure of RPV Increasing Stable Stable

CV Pressure Drywell Increasing Stable Stable

Water injection to RPVInjection of freshwater – via mobile electric pump with off-site power

Injection of freshwater – via mobile electric pump with off-site power

Injection of freshwater – via mobile electric pump with off-site power

Water injection to CV No information No information No information

Spent Fuel Pool StatusFresh water spraying completed by concrete pump truck

Freshwater injection to the Fuel Pool Cooling Line

Freshwater injection via Fuel Pool Cooling Line and Periodic spraying

Fresh water spraying completed by concrete pump truck

IAEA

Unit 5 6

Power 784/2381 1100/3293

Type of Reactor BWR-4 BWR-5

Status at the EQ occurred Outage Outage

Core and Fuel

Cold ShutdownBeing maintained using off-site electrical power and existing plant equipment.

Cold ShutdownBeing maintained using off-site electrical power and existing plant equipment.

RPV & RCS integrity

Containment int.

AC Power

Building

Water level of RPV

Pressure of RPV

Containment Pressure

Water injection to RPV

Water injection to CV

Spent Fuel Pool Status

Severe condition

Concern

No immediate concern

IAEA

Condenser1600 m3

Condensate Storage tank

1900 m3

Suppression Pool Surge

Tanks2x3400 m3

2nd Step

Transfer to provide tank capacity Mar 31st to Apr 2nd – Unit 1

3rd Step

Provide Space in CondenserApr 2nd – Unit 1

Water in Unit 1 Turbine Building

Approx. 20,000 tons

Mar 24th – Mar 29th

1st Step

Con

dens

er fi

lled

Rad Waste

Treatment facility

Temp Storage

Tank

Planned

Sequence of Events to Remove Water in Unit 1

IAEA

Condenser3000 m3

Condensate Storage tank

2500 m3

Suppression Pool Surge

Tanks2x3400 m3

1st Step -Transfer to provide tank capacity

Mar 29th to Apr 1st – Unit 2

2nd Step - Transfer to provide capacity in condenserApr 2nd – (30 m3/h)

Water in Unit 2turbine building

Approx. 20,000 tons

Planned

Rad Waste

Treatment facility

Planned

Sea

Apr 5th

10,000 tons

Unit 5 & 6 sub drain

pits

Apr 5th 1,500 tons

Low level contaminated water

Temp Storage

Tank

Sequence of Events to Remove Water in Unit 2

IAEA

Condenser3000 m3

Condensate Storage tank

2500 m3

Suppression Pool Surge

Tanks2x3400 m3

1st Step -Transfer to provide tank capacity

Mar 28th to Mar 31st - Unit 3

2nd Step - Transfer to provide capacity in condenserApr 5th – Unit 3

Water in Unit 3turbine building

Approx. 20,000 tons water

Later

Rad Waste

Treatment facility

Later

Sea

Apr 5th

10,000 tons

Unit 5 & 6 sub drain

pits

Apr 5th 1,500 tons

Low level contaminated water

Temp Storage

Tank

Sequence of Events to Remove Water in Unit 3

IAEA

• Borehole• Injection of Tracer• Injection of liquid glass

Cross Section Plan

Screen Pump room

Floor Plan

Cable Trench

Pit

Injected liquid glass to block the water path in the gravel

Injection of water glass to block the water path

①～⑨ :Positions of injection holesZ

Crack？ Screen Pump room

O.P.+4.200

O.P.+2.700

O.P.+2.200

Pit

About1m？

O.P.+4.150

1900 200

1800

O.P.+4.000

300300？ ⑦⑧

⑤ ⑥① ②

①

②

④

⑥

⑧

⑤

③

⑨

⑨

Drill vertically

IAEA

Nitrogen injection