Since "pollution" is stuff you don't want in a place where you don't want it then the answer is pretty much "none". Nuclear reactors produce several tons of spent fuel each year which is highly radioactive but it is kept under tight controls as the radioactivity decays and the spent fuel cools thus it isn't "pollution" in this sense because it doesn't get out where you don't want it.
Nuclear plants do discharge slightly warmer water than they intake which could be described as pollution if it were shown to harm the environment. Generally, the local animals appreciate the warmer water.
There are several kinds of pollution associated with nuclear power.
One is radioactive materials spilled or released. Usually these are low level nuclear waste, such as tritiated water. Sometimes high level nuclear waste is released, such as radioactive Iodine, 131I, and radioactive Krypton gas. Sometimes spent fuel is lost or spilled. Accidents with high level waste are very unusual, but over a quarter of nuclear reactors in the United States have tritiated water in the ground water beneath them. Of course, since high level nuclear waste is regarded as unsafe for about 1,000,000 years, figures for what has happened in the last 50 years do not tell us much.
Nuclear power also has a carbon footprint. Early studies on the nuclear carbon footprint did not include construction, decommissioning, and waste disposal, which are included in total carbon footprint calculations. Part of the problem with such a calculation for nuclear power is that no one knows how the high level nuclear waste will be disposed of, so the actual values can only be guessed at. Nevertheless, the consensus among eight studies reported in 2006 and 2007 places the nuclear carbon footprint at about 90 grams of carbon dioxide equivalent per kilowatt hour (gCO2e/kWh). By comparison, wind and hydro power are about 15-20 gCO2e/kWh, modern photovoltaic cells are about 40 gCO2e/kWh, combined cycle natural gas is about 575 gCO2e/kWh, oil is about 900 gCO2e/kWh, and coal is about 1000 gCO2e/kWh
Not directly. It is as close to a safe, non-polluting machine as anything. BUT, when the used-up radiating reactor rods need to be put somewhere, they then have the potential to being damaged in a way that releases radiation as a pollutant.
Althoguh nuclear energy creates no direct pollution, such as greenhouse gases, it does produce 'Nuclear Waste' a material, that gives off nuclear radiation (alpha, beta, and gamma). This waste is only dangerous until it has decayed to a stable material, at which point, it's harmless
the dangerous waste is a way of pollution.
Hot water that cools the power plant, radioactivity from nuclear wastes that might be contaminated for thousands of years.
next to nothing
heat
There is smoke pollution from the reactor itself, in addition to the large trouble of disposing of the highly toxic nuclear waste.
there are no bad things about the nuclear power reactors
Fast neutron nuclear reactors, among other new Nuclear technologies. Nuclear power is the cleanest most efficient power source. Reducing burning of fossil fuels will significantly reduce pollution in the atmosphere.
In nuclear reactors
No, at least not for power reactors
There are currently (year 2013) 31 countries having nuclear power reactors. The rest are not having nuclear power.
The pumps that were supposed to keep the nuclear reactors cool failed to work because the earthquake broke them
No substitute for nuclear power reactors especially if there is no available fossil fuel.
No, they don't. All Pakistan nuclear power reactors are imported from outside.
No. Our reactors are fission reactors. We haven't yet mastered fusion reactors for power.
France (having 58 nuclear power reactors and one under construction) with around 80% of its electricity is produced by nuclear power.