Developing the process of collecting samples of the waste filter for NPP waste

Among the NPP waste generated before 2004, 709 drums of waste filters are stored, and among them, 522 drums are stored in PWR and 187 drums are stored in PHWR. PWR and PHWR waste filters are stored in different ways, and they are different types too. PWR waste filters are stored in specially made vessels (F, SH drum), and PHWR waste filters are stored in the lattice structure in the basement of temporary repositories. For final disposal of stored waste filters, nuclide analysis, required by the radioactive waste acceptance criteria, must be conducted before disposal. This study developed the process of collecting samples for nuclide analysis to evaluate the nuclide innventory for final disposal of waste filters, generatedby PWR before 2004. The simulation for collecting samples of waste filters stored in F drums and SH drums was conducted, and based on the results, the sampling procedure for preventing the spread of contamination and minimizing the exposure of workers was established.