Calculated public doses from 39 years of emission from Studsvik

Emission monitoring of radionuclides has been performed since 1959 at the Studsvik site at the Baltic coast in the county of Södermanland, 80 km south of Stockholm. Several small nuclear reactors have been used at the site. Today only one 50 MW high-flux pool-type materials testing reactor (MTR) and one 1 MW low-power pool reactor are used. In the R2 reactor, testing of nuclear reactor fuel, production of radioisotopes for medical purposes and neutron transmutation doping of silicon are performed. A facility for boron neutron capture therapy (BNCT) for medical treatments at the R2-0 reactor will be in operation by the year 2000. The University of Uppsala has a department of neutron research at the reactor. Other types of nuclear work done at Studsvik are decontamination, incineration, melting and recycling of low-level waste. Yearly emissions are much smaller than the limit, 0.1 mSv per year to the critical group, set by the Swedish authority.