[en] The radiation protection control report for the Research Centre Seibersdorf comprises the results of all measurements which have been performed during the year 1989 by the radiation protection control department to protect the employees and the environment of the Research Centre Seibersdorf. Personnel monitoring was carried out by TL-dosimetry to control the external dose, by body counting and excretion analysis for the surveillance of internal exposure according to the Austrian Radiation Protection Law. Monitoring of working places and laboratories was performed by external dose rate measurements, by smear tests and by measurements of the activity concentration in air. The radioactivity emissions from the ASTRA-reactor, the SAL, the waste-incineration plant and other institutes as well as the radioactive effluents from the water treatment plant were monitored. The environmental surveillance was supplemented by measurements of the activity content of surface air, tap- and surface water, soil and vegetation samples. The net dose amounted to less than 1% of the annual limit of 50 mSv for occupationally exposed workers. For a collective of 345 employees actually occupied in radiation areas the average annual dose including natural background radiation amounted 1,31 mSv/a (131 mrem/a) which is also less than 1% of the maximum value. 24 tabs., 14 figs. (Authors)