The popularity of nuclear energy is lower than it used to be, particularly after the recent Fukushima accident. This however doesn't mean that nuclear energy has lost all of its proponents so let's look at the pros and cons of using nuclear energy.
Nuclear energy pros:
Nuclear energy is very reliable energy source.
Nuclear energy doesn't contribute to increase in greenhouse gas emissions that contribute to climate change.
New nuclear power plants need to comply with maximum safety standards.
Negligible chance of nuclear reactor exploding.
There is plenty of uranium (main nuclear fuel) available on our planet.
Doesn't depend on dirty fossil fuels to produce electricity.
Very high efficiency of nuclear power plants.
Can improve energy security and energy independence.
Can decrease the need for foreign oil import.
Nuclear energy cons:
Nuclear accidents, though very rare, create massive environmental and health damage because of radioactive materials.
Nuclear waste issue. This is the main drawback of nuclear energy. The average nuclear power plant annually generates around 20 metric tons of high-level radioactive waste that has a lifespan of more than 5,000 years.
High construction and operational costs. This is because lot of money needs to be spent to comply with strict safety standards.
Higher costs compared to fossil fuels.
Lack of public support after recent Fukushima accident.