Example of UO2 alteration under radiolysis

Raman scattering spectroscopy is particularly well suited to in situ measurements. Light in the visible range (most often) can be easily injected into an optical fiber, keeping the spectrometer/detector/laser assembly mechanically/thermally stable, and allowing only the Raman probe to face the sample.

This probe can be designed to adapt to the extreme conditions applied to the sample, by providing a thermal shield (water circulation) or against ionizing radiation, by placing it in an isothermal chamber (deep sea).

This technique has been successfully applied to the high-temperature and high-pressure fields for some twenty years.

Certainly more than in other industrial fields, knowledge of the properties of materials used in the nuclear industry is crucial. For economic reasons, on the one hand, but also and above...