Monte Carlo modelling for the lung monitoring of enriched uranium; Results of an international comparison

Broggio, D.*; Bento, J.*; Caldeira, M.*; Cardenas-Mendez, E.*; Farah, J.*; Fonseca, T.*; Konvalinka, C.*; Liu, L.*; Perez, B.*; Capello, K.*; Cowan, P.*; Cruzate, J.-A.*; Freire, L.*; Gmez-Ros, J.-M.*; Gossio, S.*; Heide, B.*; Huikari, J.*; Hunt, J.*; Kinase, Sakae   ; Kramer, G. H.*; Kurihara, Osamu*; Kyrielis, A.*; Lebacq, A.-L.*; Leone, D.*; Li, C.*; Li, J.*; Milhailescu, L.-C.*; Moraleda, M.*; Navarro, J.-F.*; Oliveira, C.*; Puerta, N.*; Reichelt, U.*; Simes, C.*; Sommer, D.*; Takahashi, Masa ; Teles, P.*; Vanhavere, F.*; Vrba, T.*; Franck, D.*; Gualdrini, G.*; Lopez, M.-A.*

In order to assess the reliability of Monte-Carlo (MC) based numerical calibration of counting systems, and in order to provide training for this issue, particularly the use of voxel phantoms, the EURADOS network supported a comparison of MC simulation results of well defined experiments. measurements of enriched uranium in a thoracic phantom have been carried out and the needed information to simulate these measurements was distributed to participants. About half of the participants managed to simulate the measured counting efficiency without support from the organizers. Following additional support all participants managed to simulate the counting efficiencies within a typical agreement with experiment of 5%.