Radiological and legal aspects of energy production by burning peat.

Peat burning is planned as one of the future sources for heat production in Sweden. At the end of 1983, results of some investigations on peat ashes indicated enhanced uranium contents. Recent measurements on peat areas have shown external gamma radiation dose rates up to 10 microGy/h and samples of dried peat have shown a radium content up to 3.3 X 10(5) Bq/kg. In order to estimate the radiological impact of the use of peat as an energy source, the National Institute of Radiation Protection in Sweden has initiated some research projects. Some preliminary results will be discussed against the background of possible need for limits and protection measures. In some cases the high uranium content of the ash makes it necessary, with present regulations, to have special licenses. Both the radiological impact and legal aspects will be discussed.