Analyse d'eaux radioactives d'un condenseur de réacteur nucléaire par spectrométrie de fluorescence X à réflexion totale (TXRF), dans un laboratoire en zone surveillée sans protection biologique

Abstract
Total-Reflexion X-Ray Fluorescence Spectrometry differs fundamentally from classical X-ray fluorescence (XRF). The differences between XRF and TXRF apply to sample preparation, calibration, data analysis and detection performance as well as to the objects under investigation. Instrumental detection limits is a few pg for most of elements (Z>13). Besides the high detection power, internal standardization is another important feature, providing a simple and reliable quantification of a multi-elementary analysis. In addition, the small sample mass required enables micro-analytical questions to be tackled. The analysis of a radioactive water can be considered as micro-analysis. Addition of internal standard, dilution and deposit can be done in nuclear laboratories. After evaporation, the activity must be inferior to 7000 Bq for alpha emitters, 10⁷ Bq for beta gamma emitters and the measurement can be done in non controlled zones. The results can be compared with the same analysis done with ICP/MS in glove box.