Report on research and development work 1982 of the Institut fuer Nukleare Entsorgungstechnik

The R and D work carried out at the Institute of Nuclear Waste Processing during 1982 under the four sections Chemistry, Processing Technology, Final Storage, and Infrastructure and Analysis is reported here. Areas of emphasis were: 1) Development and demonstration of a technical process for embedding highly radioactive solutions of fission products in borosilicate glass blocks, 2) Study of the properties of original glass moulds produced in this process, 3) Solidification of low and medium-active waste concentrates in cement, 4) Separation of actinides and fission products from medium-active waste solutions, 5) Solidification of alpha-containing concentrates in a ceramic matrix and characterization of the products, 6) Demonstration of wet chemical oxidation of combustible wastes containing higher levels of Pu together with the recovery of Pu, 7) Investigation of the release of radionuclides from medium-active waste products by leaching, corrosion, and mechanical or thermal stress, 8) Studies on the development of long-term stable containers suitable for final storage of highly radioactive glass products in salt, 9) Studies on the storage of heat-generating waste in salt, 10) Studies on analytical safety assurance for final storage in geological formations. (orig./RB)