A Basis for Routine Urine Sampling of Workers Exposed to Plutonium-239

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Abstract
A routine programme for the measurement of plutonium in urine is discussed in relation to the other methods of controlling the internal radiation dose of those working with plutonium. The urinary excretion pattern following intakes of plutonium compounds is considered and a value for Q, the maximum body content applicable to all compounds, is proposed. A reference level and an action level for urinary excretion rates are suggested. Factors influencing the choice of sampling procedure and frequency are discussed. An example is given showing how the reference level and action level are used in a typical sampling programme. Special mention is made of the managerial actions which are taken when a worker's urinary excretion rate exceeds the reference level and the action level.

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