Determination of small quantities of plutonium with solid state nuclear track detectors

The derived investigation level used for the plutonium (0,2 pci/day) was computed by Beach Dolphin and in this typical calculation, they considered the equivalent dose in bones only. The excretion function used was mainly that of incorporation, therefore the evaluation risk at internal contamination is not real. From the orientation point of view of publication 30 at ICRP, we calculated some new derived investigation levels for the plutonium. These were evaluated by means of the effective equivalent dose and that of the excretion function of intake in order to consider the equivalent dose received in the non-systemic phase. Therefore the evaluated risk is more realistic. These new derived investigation levels can be 100 times smaller than the old ones, hence very low equivalent doses and important to record for further statistical purposes. The first problem to resolve is that of verifying whether these techniques would give us the possibility of measuring these newly derived investigation levels correctly. This leads us to actually test the techniques of the nuclear track detectors, the LR 115 and the CR-39