Objective Limiting values for the release of concrete with low-level residual radioactivity for the selective safe utilization (eg, for noise barriers, earth fill, earth bank or substitute for foundation material) are presently not defined. The research programme will examine whether it is possible to define limiting values for radioactively contaminated concrete in the range of the limiting values for steel. The effect of radioactively contaminated concrete on the soil (leach out of radionuclides) and on man (radiation exposure) will be determined. The results of these studies will have an effect on the decommissioning activities as far as buildings of the controlled area and the kind and quantity of the radioactively contaminated concrete are concerned. The advantage of the studies lies in an economic and safe recycling of large amounts of concrete with a low-level artificial residual radioactivity. Thereby, valuable ground storage space would be saved and natural gravel deposits would be preserved. The research work will provide data concerning cost saving by recycling concrete from controlled areas, radiation exposure of the decommissioning workers and of the general public. The research programme is performed in cooperation with CEA-IPSN, which has a research programme with a similar objective. Limiting values for the release of concrete with low level residual radioactivity for selected safe utilisation (eg for noise barriers, earth fill, earth bank or substitute for foundation material) are presently not defined. The research programme will examine whether it is possible to define limiting values for radioactively contaminated concrete in the range of the limiting values for steel. The effect of radioactively contaminated concree on the soil (leach out of radionuclides) and on man (radiation exposure) will be determined.The preparations and planning of the wash out tests were finished and the test stand in the nuclear power plant was completed. The tests have been started. Measurements of the test materials and first results of the wash out tests were obtained. The literature study concerning the wash out behaviour of concrete was completed. A literature study on the composition of natural rainwater was carried out. 20 samples of aged concrete and 52 samples of freshly poured concrete were collected and measured by gamma spectroscopy in order to determine the natural radioactivity of concrete. The literature study, performed in parallel to those activities, examining the natural radioactivity of concrete, was completed.WORK PROGRAMME 1. Leach tests 1.1. Design of the test facility and determination of concrete test specimen. (all) 1.2. Construction and operation of the test facility. (TUV-Bay.) 1.3. Literature survey on leaching out problems of radionuclides in concrete. (TUV-Bay.) 1.4. Radiological measurements on concrete rubble before, during and after leach out tests. (TUV-Bay.) 2. Natural radioactivity in concrete 2.1. Procurement of samples from recently produced and aged concrete. (RWE) 2.2. Measurement of alpha, beta and gamma radiation. (TUV-Bay.) 2.3. Literature survey concerning the natural radioactivity of concrete. 3. Development of methods for recycling concrete. 3.1. Examination of concrete recycling possibilities by a literature study. (RWE) 4. Calculation of radiation exposure and determination of the artificial residual radioactivity 4.1. Determination of radiation exposure scenarios. (TUV-Bay.) 4.2. Calculation of radiation exposure for man due to natural and artificial radioactivity. (TUV-Bay.) 4.3. Derivation of criteria for the safe use of concrete with artificial radioactivity. (TUV-Bay.) Fields of science engineering and technologyenvironmental engineeringwaste managementwaste treatment processesrecyclinghumanitieslanguages and literatureliterature studiesengineering and technologyother engineering and technologiesnuclear engineeringnatural scienceschemical sciencesnuclear chemistryradiation chemistrynatural sciencesphysical sciencesopticsspectroscopy Programme(s) FP2-DECOM 3C - Specific research and technological development programme (Euratom) in the field of decommissioning of nuclear installations, 1989-1993 Topic(s) A6 - Estimation of radioactive waste quantities arising from decommissioning Call for proposal Data not available Funding Scheme CSC - Cost-sharing contracts Coordinator Technischer Überwachungsverein Bayern eV EU contribution No data Address Westendstraße 199 80686 München Germany See on map Total cost No data Participants (1) Sort alphabetically Sort by EU Contribution Expand all Collapse all RWE POWER AG Germany EU contribution No data Address Kruppstrasse 5 45128 ESSEN See on map Total cost No data