At present nuclear power plants provide more than 15 per cent of world’s energy production. But some problems arise from this technology, and among the others problems is the nuclear waste products utilization. As a result of nuclear energy production process, both the new fissionable material is produced and accumulated in fuel material and fuel is enriched with highly active fission products. That fact poses a several environmental threat. One of known ways to neutralize highly active isotopes contained in nuclear spent fuel is a transmutation-based technology. The TENDL library presented is to provide recommended neutron-nuclei interaction characteristics for isotope set of interest in numerical transmutation computations. 103 isotopes including 6 effective fission fragments from the world libraries of evaluated constants are involved into the current version of TENDL library. The methods and criteria of data selection, the content of TENDL library are described in this report.