The correct answer is D. vary based on activity.
Radioactive waste is a byproduct of nuclear power generation, medical procedures, and research. It is classified according to its level of radioactivity and half-life, the time it takes for half of the radioactive material to decay. Low-level radioactive waste, such as medical X-ray film, can be disposed of in landfills. High-level radioactive waste, such as spent nuclear fuel, must be carefully managed and disposed of in a way that protects human health and the environment.
There are a number of different methods for disposing of radioactive waste, and the best method for a particular type of waste depends on its activity, half-life, and other factors. Some common methods for disposing of radioactive waste include:
- Deep geological disposal: This is the most common method for disposing of high-level radioactive waste. The waste is buried in a deep underground repository, where it will be isolated from the environment for thousands of years.
- Surface impoundment: This method is used for low-level radioactive waste. The waste is stored in a large, lined pond or tank.
- Landfill disposal: This method is used for low-level radioactive waste with a short half-life. The waste is buried in a specially designed landfill.
- Ocean disposal: This method is no longer used in the United States, but it is still used in some other countries. The waste is mixed with concrete and then dumped into the ocean.
The disposal of radioactive waste is a complex and controversial issue. There is no one-size-fits-all solution, and the best method for a particular type of waste must be carefully considered.