Braking radiation in problem of identification & management of radioactive waste

Growth of atomic energetics and nuclear technologies is accompanied by increase of radioactive waste including long-lived ones. The wastes inside the wrecked Chernobyl 4-th unit is of particular importance because their amount is estimated as much as 20MCi. Under the circumstances a problem of operative identification of the waste and their long-term disposal is urgent. The report presents an overview of the waste identification high-duty method elaborated in NSC KIPT and based on γ-activation analysis with use bremsstrahlung of the high-current electron accelerator. On the other hand disposal of the radioactive waste faces a problem of confinement materials (including geological structures). Such materials have to keep their protection properties with respect to radionuclide transport under absorbed dose value up to ∼10⁸ Gy during thousand years or so. The elaborated methods for production of radionuclide-tracers and operative determination of their diffusion coefficients into barriers under different doses of the braking photons and corrosion conditions are described.