Study of uranium-235 fission products in the WWR-SM reactor core
Abstract
The article shows the necessity, as well as the technical and methodological feasibility of determining fission products in the water of the primary circuit and assessing the relative leakage of fuel assemblies of the reactor core. This is very important from the point of view of the further operation of a particular FA and determines the maximum allowable burnup depth in the FA. Timely determination of the relative leakage of fuel assemblies prevents the deterioration of the radiation situation at the facility, as well as the release of large activities into the atmosphere. And this, in turn, protects both personnel and a limited part of the population from increased exposure. Investigations of gaseous fission products in the upper reactor space were also carried out. The radiation monitoring system of the WWR-SM reactor constantly monitors the dose rate of water in the primary circuit and the dose rate of the upper reactor space. The system for monitoring radio-active emissions of the WWR-SM reactor is equipped with a point for continuous sampling of the gas-aerosol mixture entering the atmosphere. The technical support of the system for monitoring sources of release of radioactive substances from the WWR-SM reactor includes equipment that allows sampling for a filter package consisting of filtering and sorption-filtering materials.