GROUP NAME: ARISTOCRATTOPIC: Nucl ear accid ent in: FUKUSHIMA(Japan)Satish Vijay Asmita Neha Rajankadam kumbhar mane mhatre Upadhyay• Roll no : • Roll no: • Roll no: • Roll no: • Roll no: 23 32 35 38 66
TYPES OF NUCLEAR REACTORS• Pressurized water reactors• Pressurized heavy water reactors• Boiling water reactors• Advanced Boiling Water reactors• Pool water reactors• Liquid metal cooled reactors and so on
FUKUSHIMA NUCLEAR PLANT• This Daiichi Nuclear Power Plant is a BWR type located in the town of Okuma in the Futaba District of Fukushima Prefecture, Japan, first commissioned in 1971.• It houses six reactors, all of same type falls under the Generation II• These reactors are capable of producing a power of 4.7Gwe.• Fukushima I is one of the 15 largest nuclear power stations in the world.• These reactors used Low Enriched Uranium as fuel.
The Nuclear power plant Fukushima I• Started working in 1971• Biggest and oldest nuclear power plant• Produces 4,5 GW electricity per year
FACTS OF POWER PLANT• Risks of the atomic plants where known• The Safety Directives were checked three times in the last 35 years• Japan build a center for emergency • Was only good for 7.0-magnitude earthquakes • 9.0-magnitude earthquakes
How it is started• The earthquake occurred 11th March 2011 at 14:26 (Japanese time) in the North-East of Japan• Strength: 8,9• Cause a 10 m high tsunami• More than 20,000 dead and missed people
The happenings in Fukushima I• 2 minutes after the earthquake the atomic power plants Fukushima I, Fukushima II, Onagawa and Tokai shut down• At 15:41 the tsunami hit Fukushima I an destroyed the fuel tanks of the emergency power supply• In the evening an evacuation was started in an area of 20 km around Fukushima I
The happenings in Fukushima I• Next day there was a huge Hydrogen explosion in reactor block 1. To chill the reactor and to stop the nuclear meltdown they pumped sea water into reactor block 1• To avoid another explosion TEPCO dumped radioactive steam in reactor block 3• Reactor block 3 exploded on 14th March 2011
The happenings in Fukushima I• The radioactivity raised dramatically after an explosion in reactor block 2• In the following days there were several fires in reactor block 4 but no raise of radioactivity• 19th March 2011: the maximal amount of radioactivity in milk and spinach was exceeded• Radioactive iodine was found in the ground water
Health Effects of Radiation• Radiation changes living cells • body repairs low dose rate damage • body cannot repair large acute doses • Cancer• Degree of effect depends on dose intensity, length of exposure, and type of cell exposed
Economy Society • Around the atomic plant the recovery of the Tsunami-• Evacuation of companies victims is retarded• Power off• World trade problems • Because of the• 75% less visitors contamination it is dangerous to give the victims to the relatives. EFFECTS Germany • For all of the 17 german atomic plants: safety inspections • Seven oldest atomic plants in Germany are abandoned
Human casualties• 56 people lost their lives as a direct result of radiation poisoning or fire.• Thyroid cancer from drinking milk 10-12 thousand.• There was large amount contaminated water in reactors but less amount contaminated water has been gone into the sea.• There much effects on humans has not been seen yet.
List of dangers connected to NPPs Release of radioactive element into environment Radioactive isotope pollution Water temperature increase The threat of nuclear accident Threat of nuclear terrorism Transportation of the waste can be riskyDuring the operation of nuclear power plants, radioactivewaste is produced, which in turn can be used for theproduction of nuclear weapons.
CONCLUSION• Being a second generation power reactor it has undergone some operation failure… whose effect we saw earlier. But with just this we cant claim the nuclear power generation is a dangerous since it is the only better solution to overcome the power necessity in this machine world.• In India we have almost all working nuclear PowerStation falling under the category of Gen III or III+ with additional safety measures been employed. Also our seismic zone falls under the category of low possibilities for earthquake with such magnitude and hence low risk involved.• But if any accident occur then think what will happen?