FUKUSHIMA DAIICHI NUCLEAR DISASTER Fukushima Daiichi Nuclear Disaster

FUKUSHIMA DAIICHI NUCLEAR DISASTER

Fukushima Daiichi Nuclear Disaster • Disaster from nuclear power factory. • The problem of the power plants. • the reactors let the radioactive come out.

Why did it happen ? ? • Earthquake and tsunami attacked the east coast of Japan where the nuclear power factory is located. • The explosion of the nuclear power plants.

The effects that came from this event. • There were a lot of people that have to move out of that area about 20 km. • The nuclear reactor which broken let the radioactive came out. • In many country there were groups that against the nuclear power. • Many countries had to think over the import goods which from Japan. • A 20 km radius around the plant was closed.

How did the plant explode? • As soon as the first earthquake was happen, the safety of the nuclear reactor system will turn off the reactors by automatically. • They need to use the retardants to slow down the reaction.

• First, the cooling system will pump the water into the reactor. • But there was not enough electric left in the plant. • So they have to use diesel power pumper to pump water in.

• But the diesel power pumper was damaged from earthquake. • So the second cooling system had been started. • Tsunami attack the coast and then the system was down.

• Third cooling system had been started. • The level of water in the reactor was decrease because of the temperature was too high and the water pipe was leak.

• The reactor had high temperature and vapour cannot condense into water. • The engineer let the vapour came out to decrease the pressure inside the reactor • The vapour became hydrogen gas and it make some spark then it explode.

• There was no any cooling down system left. • Pump sea water into the reactor. • The minerals in sea water has been concentrated in a high radioactive inside reactor would be as well.

Hero of Fukushima Daiichi • “Fukushima 50” team is the Hero of Fukushima. • They have 50 men and do not disclose their name. • All of those men are polices, soldiers, firemen, and Fukushima workers.

Timeline of the Fukushima Daiichi nuclear disaster. • Friday, 11 March 2011 14: 46 : 9. 0 magnitude earthquake strikes the coast of Honshu Island at a depth of about 24 km. 15: 03 : Reactor 1’s emergency cooling system is manually shut down. 15: 27 : The first tsunami strike the plant. 18: 00 : The falling water level in reactor 1 reaches the top of the fuel and the core temperature starts climbing. 18: 18 : Reactor 1’s emergency cooling system is once again back on.

• Saturday, 12 March 2011 04: 15 : Fuel rods in reactor 3 are exposed. 05: 50 : Fresh water injection into reactor 1 is started. 06: 50 : The core of reactor 1 has now completely melted and fall to the bottom of the reactor pressure vessel. 10: 09 : TEPCO confirms to release a small amount of vapour into the air to release pressure in reactor unit 1 in Fukushima 1. 14: 50 : Fresh water injection into reactor 1 is stopped. 15: 36 : There is massive explosion in the outer structure of unit 1. The concrete building surrounding the steel reactor vessel collapses as a result of explosion. 19: 00 : Sea water injection into reactor 1 is started. 21: 40 : The evacuation zone around Fukushima 1 is reached to 20 km while Fukushima 2 is reached 10 km.

• Sunday, 13 March 2011 02: 42 : the high pressure coolant injection system for reactor 3 stops and the water level within the reactor starts falling. 07: 00 s : the water level in reactor 3 reaches the top of the fuel. 09: 00 s : The core started to damage in reactor 3. • Monday, 14 March 2011 11: 01 : the unit 3 reactor building explodes and injuring 6 workers. 13: 15 : the reactor core isolation cooling system for reactor 2 stops and the water level within the reactor starts falling. 15: 00 : A major part of the fuel in reactor 3 drops to the bottom of the reactor pressure vessel. 18: 00 s : the water level in reactor 2 reaches the top of the fuel. 20: 00 : The core started to damage in reactor 2.

• Tuesday, 15 March 2011 11: 00 : A second explosion of reactor 3 20: 00 : A majority of the fuel in reactor 2 drops to the bottom of the reactor pressure vessel.

Aftermath • There was no people who death from a short term radiation. • There was approximately 16, 000 people died from earthquake and tsunami. • A year later, all but two of Japan nuclear reactor s had been shut down.

How does the nuclear reactors work ? • Boiling nuclear reactor type

“Thank you for your attention” Yingsak Trongkitpaisal. M. 5/8 No. 10

FUKUSHIMA DAIICHI NUCLEAR DISASTER

Fukushima Daiichi Nuclear Disaster • Disaster from nuclear power factory. • The problem of the power plants. • the reactors let the radioactive come out.

Why did it happen ? ? • Earthquake and tsunami attacked the east coast of Japan where the nuclear power factory is located. • The explosion of the nuclear power plants.

The effects that came from this event. • There were a lot of people that have to move out of that area about 20 km. • The nuclear reactor which broken let the radioactive came out. • In many country there were groups that against the nuclear power. • Many countries had to think over the import goods which from Japan. • A 20 km radius around the plant was closed.

How did the plant explode? • As soon as the first earthquake was happen, the safety of the nuclear reactor system will turn off the reactors by automatically. • They need to use the retardants to slow down the reaction.

• First, the cooling system will pump the water into the reactor. • But there was not enough electric left in the plant. • So they have to use diesel power pumper to pump water in.

• But the diesel power pumper was damaged from earthquake. • So the second cooling system had been started. • Tsunami attack the coast and then the system was down.

• Third cooling system had bee started. • The level of water in the reactor was decrease because of the temperature was too high and the water pipe was leak.

• The reactor had high temperature and vapour cannot condense into water. • The engineer let the vapour came out to decrease the pressure inside the reactor • The vapour became hydrogen gas and it make some spark then it explode.

• There was no any cooling down system left. • Pump sea water into the reactor. • The minerals in sea water has been concentrated in a high radioactive inside reactor would be as well.

Hero of Fukushima Daiichi • “Fukushima 50” team is the Hero of Fukushima. • They have 50 men and do not disclose their name. • All of those men are polices, soldiers, firemen, and Fukushima workers.

Timeline of the Fukushima Daiichi nuclear disaster. • Friday, 11 March 2011 14: 46 : 9. 0 magnitude earthquake strikes the coast of Honshu Island at a depth of about 24 km. 15: 03 : Reactor 1’s emergency cooling system is manually shut down. 15: 27 : The first tsunami strike the plant. 18: 00 : The falling water level in reactor 1 reaches the top of the fuel and the core temperature starts climbing. 18: 18 : Reactor 1’s emergency cooling system is once again back on.

• Saturday, 12 March 2011 04: 15 : Fuel rods in reactor 3 are exposed. 05: 50 : Fresh water injection into reactor 1 is started. 06: 50 : The core of reactor 1 has now completely melted and fall to the bottom of the reactor pressure vessel. 10: 09 : TEPCO confirms to release a small amount of vapour into the air to release pressure in reactor unit 1 in Fukushima 1. 14: 50 : Fresh water injection into reactor 1 is stopped. 15: 36 : There is massive explosion in the outer structure of unit 1. The concrete building surrounding the steel reactor vessel collapses as a result of explosion. 19: 00 : Sea water injection into reactor 1 is started. 21: 40 : The evacuation zone around Fukushima 1 is reached to 20 km while Fukushima 2 is reached 10 km.

• Sunday, 13 March 2011 02: 42 : the high pressure coolant injection system for reactor 3 stops and the water level within the reactor starts falling. 07: 00 s : the water level in reactor 3 reaches the top of the fuel. 09: 00 s : The core started to damage in reactor 3. • Monday, 14 March 2011 11: 01 : the unit 3 reactor building explodes and injuring 6 workers. 13: 15 : the reactor core isolation cooling system for reactor 2 stops and the water level within the reactor starts falling. 15: 00 : A major part of the fuel in reactor 3 drops to the bottom of the reactor pressure vessel. 18: 00 s : the water level in reactor 2 reaches the top of the fuel. 20: 00 : The core started to damage in reactor 2.

• Tuesday, 15 March 2011 11: 00 : A second explosion of reactor 3 20: 00 : A majority of the fuel in reactor 2 drops to the bottom of the reactor pressure vessel.

Aftermath • There was no people who death from a short term radiation. • There was approximately 16, 000 people died from earthquake and tsunami. • A year later, all but two of Japan nuclear reactor s had been shut down.

How does the nuclear reactors work ? • Boiling nuclear reactor type

“Thank you for your attention” Yingsak Trongkitpaisal. M. 5/8 No. 10