Safety is the state of being "safe" (from French sauf), the condition of being protected from harm or other non-desirable outcomes. Safety can also refer to the control of recognized hazards in order to achieve an acceptable level of risk.
Under the auspices of an EU-funded project, researchers are working on ways to dispose of nuclear waste underground and seal it off with specialised plugs. If the project succeeds, the first permanent geological repositories could be operating in Europe by 2025.