FOTOGRIN/Shutterstock When nuclear energy is used to generate electricity, a small amount of waste is created in the process. Because nuclear fuel is dense, only a small amount is needed to produce massive amounts of electricity. The ratio of waste to energy produced is one of the reasons nuclear power has become such a popular alternative to other options, such as fossil fuels like coal. However, nuclear waste remains one of the biggest problems associated with the use of nuclear reactors, especially since it remains dangerous for years, decades, and even centuries after disposal. The main reason for this is that some nuclear byproducts have long half-lives, which is the time it takes for half of the radioactive atoms in the waste to decay. This may vary depending on the specific by-product. Some isotopes can decay within hours or even minutes. However, some of the most common isotopes like strontium-90 and cesium-137 have a half-life of 30 years. Other types of byproducts may have much longer half-lives. For example, when uranium atoms absorb neutrons in a nuclear reactor, one of the most common byproducts is plutonium. However, it can be several types of plutonium, of which the five most common are plutonium-238, plutonium-239, plutonium-240, plutonium-241 and plutonium-242. Each of them also has different half-lives. Plutonium-241 has a half-life of 14.4 years while plutonium-239 has a half-life of over 24,000 years. Ultimately, the time it takes for nuclear waste to decay varies depending on the exact type of isotopes involved. Can the degradation of nuclear waste be accelerated? Vladimir Zapletin/Getty Images Although there has been positive research into the possibility of speeding up the decomposition of nuclear waste (a study published in 2004 suggests it might be possible), scientists are still working out the details. There have been promising efforts in this movement recently, with research such as the NEWTON project, which hopes to use particle accelerators to transform dangerous radioactive isotypes with longer half-lives into less radioactive isotopes with shorter half-lives. This would allow scientists to reduce the decay of some nuclear materials from 100,000 years to around 300 years. Nuclear waste can also be useful in some ways. Countries like France, Japan and Germany recycle plutonium to produce electricity. However, as scientists search for safe ways to speed up the rate of decay, it is important to mitigate the risks of exposing groundwater, plants and human lives to radiation found in high-level nuclear waste such as spent fuel rods. Safe storage is always important Svetliy/Shutterstock Even if attempts are made to accelerate decay, nuclear waste must still be properly stored, otherwise there are risks of environmental contamination. Plutonium, one of the main types of nuclear waste, is considered the most dangerous substance in the world. As such, it is paramount to transport and store it safely without leaking radiation into the environment. Plutonium itself is typically stored by stabilizing the isotope in a solid oxide and then sealing it in several corrosion-resistant containers. This prevents leaks and oxidation, allowing the material to be stored safely while it decomposes. The United States Government Accountability Office estimates that the United States has approximately 100,000 tons of spent nuclear fuel from commercial power plants, and with growing interest in nuclear power and the United States seeking to build next-generation nuclear reactors, this tonnage will increase. To be able to store all of this safely requires finding new ways to approach the problem, such as building underground bunkers to store radioactive materials. Some have even suggested sending nuclear waste into space for long-term disposal, but the costs attributed to such a project make it impractical, according to the U.S. Department of Energy. Post navigation European supercomputer just broke a world record you’ve probably never heard of
FOTOGRIN/Shutterstock When nuclear energy is used to generate electricity, a small amount of waste is created in the process. Because nuclear fuel is dense, only a small amount is needed to produce massive amounts of electricity. The ratio of waste to energy produced is one of the reasons nuclear power has become such a popular alternative to other options, such as fossil fuels like coal. However, nuclear waste remains one of the biggest problems associated with the use of nuclear reactors, especially since it remains dangerous for years, decades, and even centuries after disposal. The main reason for this is that some nuclear byproducts have long half-lives, which is the time it takes for half of the radioactive atoms in the waste to decay. This may vary depending on the specific by-product. Some isotopes can decay within hours or even minutes. However, some of the most common isotopes like strontium-90 and cesium-137 have a half-life of 30 years. Other types of byproducts may have much longer half-lives. For example, when uranium atoms absorb neutrons in a nuclear reactor, one of the most common byproducts is plutonium. However, it can be several types of plutonium, of which the five most common are plutonium-238, plutonium-239, plutonium-240, plutonium-241 and plutonium-242. Each of them also has different half-lives. Plutonium-241 has a half-life of 14.4 years while plutonium-239 has a half-life of over 24,000 years. Ultimately, the time it takes for nuclear waste to decay varies depending on the exact type of isotopes involved. Can the degradation of nuclear waste be accelerated? Vladimir Zapletin/Getty Images Although there has been positive research into the possibility of speeding up the decomposition of nuclear waste (a study published in 2004 suggests it might be possible), scientists are still working out the details. There have been promising efforts in this movement recently, with research such as the NEWTON project, which hopes to use particle accelerators to transform dangerous radioactive isotypes with longer half-lives into less radioactive isotopes with shorter half-lives. This would allow scientists to reduce the decay of some nuclear materials from 100,000 years to around 300 years. Nuclear waste can also be useful in some ways. Countries like France, Japan and Germany recycle plutonium to produce electricity. However, as scientists search for safe ways to speed up the rate of decay, it is important to mitigate the risks of exposing groundwater, plants and human lives to radiation found in high-level nuclear waste such as spent fuel rods. Safe storage is always important Svetliy/Shutterstock Even if attempts are made to accelerate decay, nuclear waste must still be properly stored, otherwise there are risks of environmental contamination. Plutonium, one of the main types of nuclear waste, is considered the most dangerous substance in the world. As such, it is paramount to transport and store it safely without leaking radiation into the environment. Plutonium itself is typically stored by stabilizing the isotope in a solid oxide and then sealing it in several corrosion-resistant containers. This prevents leaks and oxidation, allowing the material to be stored safely while it decomposes. The United States Government Accountability Office estimates that the United States has approximately 100,000 tons of spent nuclear fuel from commercial power plants, and with growing interest in nuclear power and the United States seeking to build next-generation nuclear reactors, this tonnage will increase. To be able to store all of this safely requires finding new ways to approach the problem, such as building underground bunkers to store radioactive materials. Some have even suggested sending nuclear waste into space for long-term disposal, but the costs attributed to such a project make it impractical, according to the U.S. Department of Energy.
