Where does nuclear waste come from?
Christopher Harper
Updated on March 21, 2026
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Hereof, what is nuclear waste made of?
HLW accounts for over 95 percent of the total radioactivity produced in the process of nuclear electricity generation. The radioactive waste from spent fuel rods consist primarily of cesium-137 and strontium-90, but it may also include plutonium, which can be considered a transuranic waste.
Beside above, where does nuclear waste go? Commercial energy generation produces the majority of nuclear waste in the U.S., which remains stored above ground near each of the 99 commercial nuclear reactors scattered around the country. Nuclear waste is stored in pools to cool for many years, and some is moved to above-ground concrete casks.
In this regard, how is nuclear waste created?
High-level waste HLW arises from the 'burning' of uranium fuel in a nuclear reactor. HLW contains the fission products and transuranic elements generated in the reactor core. HLW accounts for just 3% of the volume, but 95% of the total radioactivity of produced waste.
Why is nuclear waste a problem?
Nuclear Waste. The challenge of making nuclear power safer doesn't end after the power has been generated. Nuclear fuel remains dangerously radioactive for thousands of years after it is no longer useful in a commercial reactor. The resulting waste disposal problem has become a major challenge for policymakers.
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