Study on the Properties of Supercritical Water Flowing in a Closed Loop using Dynamic Neutron Radiography

This paper describes the first steps of the realization of a natural circulation loop cooled by supercritical water. The thermal hydraulics of supercritical water is not fully understood. The thermal hydraulic phenomenon in the loop is intended to be measured by thermocouples, absolute and differential pressure transducers, flow meter and simultaneously visualized by dynamic neutron radiography techniques. The structure of the loop, the measurement techniques applied and the data acquisition system will be presented in details.