Qualification of the activities measured by gamma spectrometry on unitary items of intermediate-level radioactive waste from particle accelerators

In the frame of maintenance, upgrade and dismantling activities, activated equipment are removed from accelerator complex require characterization in view their disposal as radioactive waste. The process consists a series radiation measurements, complemented by analytical studies, which quantify activity radionuclides inside an object. A fraction waste produced at CERN presents contact dose-rates higher than 100 ?Sv/h, can therefore be classified LILW Waste (“Low intermediate level waste”). These objects, due to activation mechanisms, often subject large heterogeneities. quantification gamma-emitting is typically performed gamma spectrometry, under assumption homogeneous distributions within However, this lead underestimating value such radionuclides. article we perform spectrometry qualification order impact assuming homogenous distribution.