G: Dealing with nuclear power leftovers, particularly radioactive waste, requires careful management to ensure safety. Here are some methods used or explored:

1. Storage Solutions

• Dry Cask Storage: Used for spent nuclear fuel. Waste is sealed in steel and concrete containers after cooling in water pools.
• Deep Geological Repositories (DGR): Waste is buried deep underground in stable rock formations (e.g., Finland's Onkalo facility).

2. Recycling and Reprocessing

• Reprocessing Spent Fuel: Extracts usable elements like plutonium and uranium for reuse in reactors (common in France and Russia).
• MOX Fuel: Combines plutonium with uranium to create mixed-oxide fuel, reducing the volume of high-level waste.

3. Transmutation Technologies

• Fast Reactors: These advanced reactors can consume some long-lived radioactive isotopes, turning them into shorter-lived elements.
• Accelerator-Driven Systems (ADS): Use particle accelerators to convert radioactive materials into less hazardous forms.

4. Temporary Solutions and Innovation

• Interim Storage: Safely stores waste until more permanent solutions are implemented.
• Nuclear Batteries: Some isotopes (e.g., strontium-90) are used in radioisotope thermoelectric generators (RTGs) to power satellites and remote facilities.

5. Alternative Disposal Techniques

• Sub-seabed Disposal: Burying waste in stable seabed layers (though largely dismissed due to environmental concerns).
• Space Disposal: Sending waste into space, though high costs and risks make it impractical.

The combination of these methods allows flexibility while innovations and long-term solutions develop further.