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[en] In January 2020, the Austrian legislature worked intensively on the complete implementation of Directive 2013/59 /Euratom into national law - the publication of the new version of the Austrian Radiation Protection Act and the associated ordinances is imminent. Fortunately, for the organization of radiation protection within companies revolutionary news are not expected yet.
[de]Im Januar 2020 arbeitete die österreichische Legislative (weiterhin) mit Hochdruck an der vollständigen Umsetzung der Richtlinie 2013/59 /Euratom in nationales Recht - die Publikation der Neufassung des österreichischen Strahlenschutzgesetzes und der zugehörigen Verordnungen steht unmittelbar bevor. Für die Organisation des Strahlenschutzes innerhalb von Betrieben sind glücklicherweise aller Voraussicht noch keine umwälzenden Neuigkeiten zu erwarten.
[en] This study focuses on radiocesium storage in soil microbial biomass of undisturbed alpine meadow sites and its relation to the soil-to-plant transfer. Soil and plant samples were taken in August 1999 from an altitude transect (800-1600 m.a.s.l.) at Gastein valley, Austria. Soil samples were subdivided into 3-cm layers for analyses of total, K2SO4-extractable and microbially stored 137Cs. Microbial biomass was measured by the fumigation extraction method, and fungal biomass was quantified using ergosterol as biomarker molecule. In general, the quantity of 137Cs stored in the living soil microbial biomass was relatively small. At the high-altitude meadows, showing high amounts of fungal biomass, microbially stored 137Cs amounted to 0.64 ± 0.14 kBq m-2 which corresponds to about 1.2-2.7% of the total 137Cs soil inventory. At lower altitudes, microbial 137Cs content was distinctly smaller and in most cases not measurable at all using the fumigation extraction method. However, a positive correlation between the observed soil-to-plant aggregated transfer factor, microbially stored 137Cs and fungal biomass was found, which indicates a possible role of fungal biomass in the storage and turnover of 137Cs in soils and in the 137Cs uptake by plants
[en] Literature data on numerical values obtained for the parameters of the two most popular models for simulating the migration of radionuclides in undisturbed soils have been compiled and evaluated statistically. Due to restrictions on the applicability of compartmental models, the convection-dispersion equation and its parameter values should be preferred. For radiocaesium, recommended values are derived for its effective convection velocity and dispersion coefficient. Data deficiencies still exist for radionuclides other than caesium and for soils of non-temperate environments.