Abstract
The level of alpha radiation from 239.240 Pu was measured in placentas from the Nenetz district south of the nuclear weapons test site at the Novaya Zemlaye archipelago in Russia. A sample of ten placentas was collected consecutively in 1993 from a maternity ward in Narjan Mar and analysed using standard chemical alpha spectrometry. The highest concentration was close to one mBq per kilo fresh-placenta or an order of ten higher than previously reported from England. The study indicates that placentas could be used for biological monitoring of external pollution by plutonium.
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