Monitoring of the electrochemical parameters and the chemistry of the environment in contact with high-level nuclear waste containers is important in confirming the model predictions of their performance. The presence of a partially saturated environment, thermally driven hydrologic processes, and gamma radiation pose challenges to the employment of sensors. A brief review of the type of parameters that need monitoring, type of sensors available, and their advantages and limitations is presented in this paper. Preliminary experimental results on the assessment of various sensors are presented.
Keywords: Monitoring, high-level radioactive waste, corrosion, sensors