20.500.12556/RUL-156269 Characterisation of the neutron field for streaming analyses in TT operations at JET Assessing radiation fields in the biological shield penetrations of fusion reactors is a challenging task. At the Joint European Torus (JET) the neutron field at larger distances from the torus has been calculated and measured. JET operated in 2021–22 with a tritium-tritium plasma and neutronics experiments were performed for validating in a real fusion environment the neutronics codes and nuclear data applied in ITER nuclear analyses. In particular, the fluence of neutrons passing through the penetrations of the JET vacuum vessel and the torus hall was measured and compared with calculations in order to assess the capability of state-of-the-art numerical tools to correctly predict the radiation streaming in large and complex geometries. The neutron fluence was monitored at several locations inside the torus hall at larger distances from the tokamak with activation foils and thermo-luminescent detectors. The calculations have been performed in a two-step process using the deterministic code ADVANTG to determine the variance reduction parameters and with MCNP for subsequent calculation of the neutron field with the Monte Carlo method. The paper presents results of calculations and the first comparison to experimentally obtained values. JET streaming TLD activation foils TT neutron transport calculations ADVANTG MCNP jedrska fizika true false true Angleški jezik Slovenski jezik Članek v reviji 2024-05-16 16:42:59 2024-05-16 16:43:04 2024-05-18 03:23:52 0000-00-00 00:00:00 2024 0 0 6 str. art. 114351 Vol. 202 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.1 1873-7196 10.1016/j.fusengdes.2024.114351 193522691 1-s2.0-S0920379624002047-main.pdf 1-s2.0-S0920379624002047-main.pdf 1 82361404E111E0766210AE06151B39E7 72f833b9b385a07451955693f4cb745c466ada8f168f9d283ca85ddcb4b079dc e41577b5-1392-11ef-bd09-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=183641 https://www.sciencedirect.com/science/article/pii/S0920379624002047 0 b02c7f2a-1392-11ef-bd09-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=183640 Fakulteta za matematiko in fiziko 0 0 0