More than 50 years ago, France made the choice to recycle spent fuel, increase the value of nuclear materials, and reduce the quantity and hazards of the most radioactive waste. Recyclable materials, uranium and plutonium, can be used to make new fuels that will in turn generate their own electricity. In France, 10% of nuclear-generated electricity comes from recycled materials.
Only 4% of nuclear materials from spent fuels are high-level long-lived waste. These are fission products. They are calcined and vitrified then poured into stainless steel containers. This safe conditioning, stable for several tens of thousands of years, is certified by 10 safety authorities in the world.