[en] The waste management philosophy of the West German Government is based on the disposal of radioactive wastes in rock-salt formations of geological substrata. This solution is considered internationally to be both realistic and valid now that competitive alternatives have been thoroughly examined on a world-wide basis. For the storage of low- and medium-active wastes in salt deposits, several years experience have now been gained in the former Asse salt-mines. For the disposal of highly radioactive waste also, considerable preliminary work has already been carried out on the problems of waste treatment and on mining aspects. The Asse salt-mines are being used in this respect for developing and testing various techniques. Containerless disposal of low-and medium-active wastes in salt caverns is planned for the proposed national waste management park, whilst solidified highly-active waste will be disposed of in a specially constructed mine, designed to permit free access to personnel. (author)

[en] The module described is based on the Intel 8080 microprocessor. It is intended to control complex peripheral devices such as a stage drive and positioning unit of a measuring projector. (author)

[en] The solutions to the technical problem of the disposal of radioactive waste are limited by a) the state of knowledge of reprocessing possibilites, b) public acceptance of the use of those techniques which are known, c) legislative procedures linking licensing of new nuclear power plants to the solution of waste problems, and d) other political constraints. Wastes are generated in the mining and enriching of radioactive elements, and in the operation of nuclear power plants as well as in all fields where radioactive substances may be used. Waste management will depend on the stability and concentration of radioactive materials which must be stored, and a resolution of the tension between numerous small storage sites and a few large ones, which again face problems of public acceptability

[en] West Germany's concept of salt mine waste disposal is discussed with special reference to experience gained at its small reprocessing plant (WAK) in Karlsruhe, and the Asse salt mine near Wolfenbuttel. (author)

[en] This presentation concentrates on the present status of radioactive waste disposal only. The construction and operation of repositories for radioactive wastes in the Federal Republic of Germany is by law a responsibility of the Federal Government. It has directed the Physikalisch-Technische Bundesanstalt PTB, which is a Federal Institution, to fulfill this task. PTB is presently pursuing the two projects of Gorleben and Konrad, the former salt mine Asse of GSF being a third option. In connection with the available results of the Gorleben field studies, discussion mainly concentrates on the quality of the strata overlying the salt dome, being one part of the multiple barrier system. Therefore a few general comments are made regarding this system

[en] The HEVAS system structure which is intended for the evaluation of track chamber pictures is described. This system is an example of a hierarchically organized computer network. It includes 4 mini-computer (TPAi) at 2 different levels (supervisor computer, device computer) and 3 microcomputers (INTEL 8080) at the lowest level (functional computer). An analysing computer may be connected at the next higher level in the future. Operating the system and hardware error processing are considered

[en] This paper discusses how comparative figures on size, population, gross national products, nuclear power, and the nuclear defense program of the United States and Germany set the scene for cooperation in radioactive waste management. This cooperation was initiated by a NAS/NRC report published in 1985. German participation in Project Salt Vault was a first step. The proper bilateral agreement was signed in 1974. A large number of assignments of scientists and of workshops were performed under this agreement. The Brine Migration Test in the Asse Salt Mine was a further highlight in bilateral cooperation. Site selection by US-Congress for the first repository in the United States was carefully observed in Germany. A further bilateral project agreement is being successfully proven at present, namely the test disposal of verified high-level radioactive waste in the Asse Salt Mine

[en] The Federal Republic of Germany and the Netherlands continued their in situ-investigations for radioactive waste disposal in salt formations during the second CEC program in the Asse salt mine. The central test of the German program, Temperature Test Field 5, showed that crystal water from the hydrated salt mineral polyhalite is liberated only at 235⁰C. The quantities of water liberated from rock salt and from polyhalite are negligible from a safety point of view. In the same test it was proved that rock salt creeps drastically at elevated temperatures and that no micro-cracks are formed which could increase the permeability of rock salt. Additional geophysical measurements confirm these results. Valuable data could be achieved by in situ-investigations for the scenario ''water or brine intrusion'' within safety analyses. The Dutch in situ-test program concentrated on convergence and pressure measurements at normal and elevated temperatures in a 300 m deep borehole which was drilled in the Asse salt mine. Construction and testing of large diameter roller-bit body was started which will allow the dry drilling of boreholes up to 1 m in diameter. Both countries decided to continue their successful cooperation during the forthcoming third R and D-program of the CEC

[en] The three fiber-forming collagens, types I, II, and III, described in this article have, in principle, the same molecular structure. In their final processed form, more than 97% of the molecules consist of a continuous triple helical domain along which the main information for an ordered parallel and D staggered self-assembly is located. Thus, fibrils of the three collagens when reconstituted in vitro do not show striking differences. In vivo, however, the macromolecular structure of the three collagen types is variable. Comparative electron microscopy of tendon and cornea, both of which contain type I collagen, and hyaline cartilage, which consists mainly of type II collagen, revealed that the latter generally forms fibrils of smaller diameter than type I collagen. In addition, the often observed tendency of type I fibrils to assemble in parallel bundles is not found in type II collagen. Immunoelectron microscopy of human skin with ferritin-labeled antibodies against types I and III collagen revealed thick fiber bundles of type I and thin fibrils of type III collagen. Although these electron microscopic investigations indicate that type I and type III collagens may form separate fibrils, there is chemical evidence that both collagens can be present in the same fibrils (Henkel and Glanville, 1982)

[en] Radioactive waste disposal in the Federal Republic of Germany is one cornerstone within the ''integrated back end fuel cycle concept.'' The Federal Government decided in January 1985 that direct disposal of spent fuel elements without processing can not serve as proof of spent fuel management from LWR's. Consequently, DWK decided on February 4, l985, to build a reprocessing plant at the site of Wackersdorf. PTB, being responsible for construction and operation of repositories, is pursuing two projects: The abandoned iron ore mine Konrad for the disposal of non-heat-generating wastes and Gorleben for all types of waste. Related RandD programs are mainly performed by GSF in the Asse salt mine