The waste generated by nuclear reactors remains radioactive for tens to hundreds of thousands of years (1). Currently, there are no long-term storage solutions for radioactive waste, and most is stored in temporary, above-ground facilities. These facilities are running out of storage space, so the nuclear industry is turning to other types of storage that are more costly and potentially less safe (2).


https://www.greenamerica.org/fight-dirty-energy/amazon-build-cleaner-cloud/10-reasons-oppose-nuclear-energy

It’s an ironic coincidence that as events unfold at the stricken Fukushima Daiichi nuclear power plant in Japan, this month (April 2011) marks the 25th anniversary of the accident at the Chernobyl nuclear power plant in what was then the Soviet Union.

1. IT’S UNSAFE AND EXPENSIVE

The 2011 Fukushima disaster showed the world that nuclear power is clearly fundamentally unsafe. The meltdown at the Fukushima I Nuclear Power Plant was the worst since Chernobyl in Ukraine, 25 years earlier. Public investment in nuclear energy far out-strips investment in renewables. Nuclear plants are also expensive to set up and decommission, and the costs of storing radioactive waste (effectively indefinitely) also have to be considered. If the money pumped into nuclear had been spent on renewables, then the pay-off would have been much greater per-euro invested. 

Unlike renewables, nuclear costs are on the rise, and many plants are being shut down or in danger of being shut down for economic reasons. Initial capital costs, fuel, and maintenance costs are much higher for nuclear plants than wind and nuclear projects tend to suffer cost overruns and construction delays. The price of renewable energy has fallen significantly over the past decade, and it projected to continue to fall (14).
https://www.greenamerica.org/fight-dirty-energy/amazon-build-cleaner-cloud/10-reasons-oppose-nuclear-energy

 

The 2011 Fukushima disaster showed the world that nuclear power is clearly fundamentally unsafe. The meltdown at the Fukushima I Nuclear Power Plant was the worst since Chernobyl in Ukraine, 25 years earlier. Public investment in nuclear energy far out-strips investment in renewables. Nuclear plants are also expensive to set up and decommission, and the costs of storing radioactive waste (effectively indefinitely) also have to be considered. If the money pumped into nuclear had been spent on renewables, then the pay-off would have been much greater per-euro invested.
 http://www.debatingeurope.eu/focus/infobox-arguments-for-and-against-nuclear/

Mining and processing uranium comes with very serious health risks for those involved as well as neighbouring communities, while also producing mountains of radioactive tailings and large quantities of contaminated liquids which represent major environmental threats.https://www.news24.com/Columnists/AndreasSpath/8-reasons-why-building-new-nuclear-power-plants-is-a-bad-idea-20160111

8. Cost

Unlike renewables, nuclear costs are on the rise, and many plants are being shut down or in danger of being shut down for economic reasons. Initial capital costs, fuel, and maintenance costs are much higher for nuclear plants than wind and nuclear projects tend to suffer cost overruns and construction delays. The price of renewable energy has fallen significantly over the past decade, and it projected to continue to fall (14). 

5. Cancer risk

In addition to the significant risk of cancer associated with fallout from nuclear disasters, studies also show increased risk for those who reside near a nuclear power plant, especially for childhood cancers such as leukemia (6)(7)(8). Workers in the nuclear industry are also exposed to higher than normal levels of radiation, and as a result are at a higher risk of death from cancer at a rate similar to the that of Japanese nuclear bomb survivors (10).
https://www.greenamerica.org/fight-dirty-energy/amazon-build-cleaner-cloud/10-reasons-oppose-nuclear-energy

Renewable sources of energy, especially solar and wind power, are capable of providing cheap, clean and safe electricity much more quickly than newly build nuclear reactors would.

The claim that we need atomic energy as part of a mix of power sources is fallacious. A number of studies have shown that renewables have the potential to provide most if not all of our electricity needs.

Nuclear power is redundant in the 21st century. https://www.news24.com/Columnists/AndreasSpath/8-reasons-why-building-new-nuclear-power-plants-is-a-bad-idea-20160111

The Chernobyl disaster, also referred to as the Chernobyl accident, was a catastrophic nuclear accident. Wikipedia

Date: April 26, 1986

Total number of deaths: 31 (direct)

Locations: Pripyat, Soviet Union, Ukrainian Soviet Socialist Republic

Like fossil fuels, nuclear fuels are non-renewable energy resources. And if there is an accident, large amounts of radioactive material could be released into the environment. In addition, nuclear waste remains radioactive and is hazardous to health for thousands of years. It must be stored safely.
http://www.bbc.co.uk/schools/gcsebitesize/science/add_edexcel/radioactive_materials/radioactiveproblemsrev3.shtml

Nuclear energy has no place in a safe, clean, sustainable future. Nuclear energy is both expensive and dangerous, and just because nuclear pollution is invisible doesn't mean it's clean. Renewable energy is better for the environment, the economy, and doesn't come with the risk of a nuclear meltdown. https://www.google.ie/search?biw=1600&bih=794&ei=vKIFWo-TBqK9gAaB6oLgCw&q=why+not+to+use+nuclear+energy+&oq=why+not+to+use+nuclear+energy+&gs_l=psy-ab.3..0i30k1j0i8i30k1.13898.41501.0.44184.27.25.2.0.0.0.87.1287.25.25.0....0...1.1.64.psy-ab..0.26.1227...0j0i67k1j0i13k1j0i7i10i30k1j0i13i30k1j0i8i13i30k1.0.pT_tGTomZcQ

Scaling up to 14,500 nuclear plants isn’t possible simply due to the limitation of feasible sites. Nuclear plants need to be located near a source of water for cooling, and there aren’t enough locations in the world that are safe from droughts, flooding, hurricanes, earthquakes, or other potential disasters that could trigger a nuclear accident. The increase in extreme weather events predicted by climate models only compounds this risk.
https://www.greenamerica.org/fight-dirty-energy/amazon-build-cleaner-cloud/10-reasons-oppose-nuclear-energy