A Plutonium contaminated wound is described together with its management. Initially, 14.2 pCi of Plutonium were present in the wound this figure being reduced to about 1.8 pCi after two excisions. During the period of assessment DTPA was administered and the effect of this is discussed. Urinary excretion data were obtained and quantitative monitoring of the lymphatic channels of the arm and the liver were attempted. Various methods of assessment of body content are discussed which indicate the amount of retained Plutonium to lie between 0.1 and 1.5 pCi. Chromosome culture from blood lymphocytes was undertaken which indicated probable preferential irradiation of these cells. G. W. DOLPHIN

Since 1952, low activity radioactive waste has been discharged by pipeline from Windscale Works to the Irish Sea off Sellafield. Environmental monitoring studies have been carried out throughout this period in order to assess the resultant radiation dose to man, and hence to estimate the discharge rate which would correspond to the maximum permissible radiation doses recommended by the International Commission on Radiological Protection. These studies have been concerned principally with those materials most likely to contribute substantially to the dose to man, and they have been supplemented by more widespread marine surveys and by laboratory studies aimed at gaining information about the movement and behaviour of radioactive nuclides in the marine environment.

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