What is a nuclear power plant and how does it work,alert signals in car,faraday cage type lightning protection systems - You Shoud Know

A terrifying reality unfolds brought on by the damage caused to the Fukushima Daiichi nuclear plant in Japan by the March 2011 earthquake and tsunami.  With this disaster ultimately comes questions pertaining to what nuclear power is, how it is managed and what a nuclear power plant actually does.
1.  Rods of radioactive materials are placed in water which causes a reaction generating mass amounts of steam. 3.  Most times the steam is trapped by a condenser which breaks the steam back down into water and recycled into the fission chamber.
4.  During this whole process, an external cool water supply is used to cool the fission reactor to keep things from overheating and exploding. Take in mind that this is a very brief and lament description of nuclear power.  You may click the image at the top of this page to enlarge to view specific locations in a nuclear power plant not mentioned above. Pressurized Water Reactors (PWR) keep water under pressure, so the water heats but does not boil. Boiling Water Reactors (BWR) heat water by generating heat from fission in the reactor vessel to boil water and create steam, which turns the generator. In both types of plants, the steam is turned back into water and can be used again in the process. The traumatic 8.9 earthquake and tsunamis which hit Japan on March 10, 2011 have caused tremendous damage and destruction across most northern parts of the country, including a fire and failed cooling at a nuclear power plant. While the benefits of nuclear energy as a clean power source are plentiful, the unpredictable disasters such as this are a reminder that nuclear power is not only unstable, but it is also a scary resource. Although Japanese officials are treating the situation as an emergency, there is not an immediate threat of danger from a radiation leak from the plant, claims Chief Secretary Yukio Edano.
Japan has used nuclear power as a national strategic priority due to the fact that Japan is heavily dependent on imported fuel and oil for its energy needs. Nuclear power has gained a good-sized cheerleading squad as a source of clean energy, but the risk of radiation exposure and the disposal of nuclear waste have also roused a fair number of opponents. Using data from past energy production (1971-2009) and future energy predictions (2010-2050), NASA climatologists  James Hansen and Pushker Kharecha estimated how much air pollution and how many related deaths nuclear power prevents as compared to burning coal or natural gas. Over the past 40 years, the NASA scientists calculated that nuclear energy prevented 64 gigatonnes of greenhouse gas emissions (measured in CO2 equivalents) from being pumped into the atmosphere. Applying these findings to the future, then, the researchers say that replacing the world’s nuclear power plants with ones that ran on coal would lead to a surge of 7 million additional air pollution-related deaths in the next 40 years.


And for your final point: Natural gas would certainly reduce the CO2 output compared to coal, but would still be significantly (80 gigatonnes) more than with nuclear. The fact that gas would produce more CO2 than nuclear is entirely irrelevant to the quoted claim. I hope that the lives lost numbers NASA gives are better than the movie and record industries’ copyright math. People fear nuclear because of the massive loss of life that could occur, in the worst case. D-briefBriefing you on the must-know news and trending topics in science and technology today. The heated pressurized water is run through pipes, which heat a separate water line to create steam. In Onagawa, northeast of Tokyo, workers have been working to repair the system at the Fukushima No. After the quake struck, the plant’s backup generation system failed, which resulted in the loss of water supply used to cool the reactor. Edano also noted that officials have launched emergency measures to be prepared to deal with the worst case scenario. The country has a total of 54 reactors which provide nearly 30 percent of the nation’s energy needs. Reactor disasters like the one in Fukushima highlight nuclear power’s risks, but scientists now say that by reducing pollution, nuclear power actually has saved millions of lives over the last 40 years. If those power plants ran on natural gas instead, that number would still sit at a pretty lofty 420,000 deaths.
The air pollution-related deaths are from particulates and other pollutants, not CO2, so I have updated the text to reflect this distinction.
Chernobyl is indeed the only fallout event included when calculating nuclear-related deaths since no deaths have been directly linked to fallout from Three Mile Island or Fukushima. Therefore it is only possible to reduce the emission of CO2 if nuclear power plants are used instead of other, CO2 emitting technologies. The fact that climate change will also and perhaps more definitively cause this loss of life is harder for people to picture.


Four nuclear power plants located closest to the quake’s epicenter have safely been shut down, while eleven other plants were automatically shut down in affected areas. Japan plans to increase nuclear power to account for 40 percent of the energy needed by 2017.
On the other side of the scale are the 4,900 deaths caused by nuclear power plants (including radiation fallout and accidents) during those 40 years. The difference in CO2 output and the difference in pollution deaths are coincident, not causal, and the distinction should be made. This is in particular the case for electrical generation plants fuelled by coal, oil or gas.
A switch from coal to gas reduces emissions in the same way that insulating a house reduces emissions.
A fire also broke out within the turbine building of the plant, which is in a separate location from the reactor. But perhaps mitigating GHG levels is distinct from mitigating the overall climate problem the researchers are referencing in their quote. The CO2 emission can indeed be reduced, if electrical power plants driven by fossil fuels are being replaced by nuclear power plants. Nearly 3,000 people from the surrounding area have been evacuated and a nuclear emergency situation has been declared. Smoke was seen coming from the turbine building, and the blaze was quickly distinguished before much damage occurred. However the application of nuclear power unfortunately is highly problematic, therefore the problem of CO2 emissions must not be looked at independently of all other risks and problems.



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