Determining water chemistry conditions in nuclear reactor coolants

Lister, D. H.*; Uchida, Shunsuke

The chemistry of the process and coolant systems in water-cooled nuclear reactors is tightly controlled to minimise materials degradation and, for some systems, to regulate reactor power. Tight control entails monitoring the systems and making appropriate adjustments. On-line monitoring can be utilised where instruments are available but otherwise samples must be taken and measurements made off-line. This paper reviews the current technologies for monitoring and sampling.