Concept of a realistic calculation of the deposition of radioactive wastes from the waste air of nuclear facilities by washout

In connection with a realistic calculation of soil contamination caused by the washout of radioactive nuclides from the waste air of nuclear installations, there arises the question of how to proceed, if, in view of the very time-consuming efforts required for the preparation of sufficiently secured statistics, dispersion-climatological data are available to a limited extent only, such as are required e.g. for safety reports for nuclear power stations. To clarify this question a practicable procedure is presented in this report, which, despite its simplified nature, permits a site-specific calculation of the washout, because it is based on the annual precipitation volumes for the individual sectors of the windrose available for about 80 stations of the German meteorological service. The site-independent data additionally required for calculating the washout are being specified. Following this, the simplified method of calculation is being compared with procedures requiring a larger amount of data. The divergencies resulting therefrom are being discussed. (orig.)