A STUDY OF THE MATERIAL ACCOUNTANCY PROCEDURE AT THE URANIUM ENRICHMENT FACILITY

This paper describes an evaluation of material accountancy based on total uranium (U element TIUF ) to detect diversions of significant quantity in the uranium enrichment facility operating at a stated maximum enrichment level of 5 %. Verification that material production is within the declared enrichment can be achieved by the inspection activities associated with limited - frequency unannounced access (LFUA) to cascade areas as treated extensively in HSP. According to the experience of the material accountancy at our facility, the reduction of the material accountancy capability by changing from U-235 isotope MUF to U element MUF is only about half. However, still the U element I1UF approach can meet the current IAEA detection goals for the up to about 1000 tswu/a plant.