20.500.12556/DKUM-79783 Pressurized Water Nuclear Reactor Downcomer Flow Simulation diplomsko delo Simulacija toka v povratnem kanalu reaktorske posode tlačnovodnega jedrskega reaktorja In the diploma thesis the flow pattern and conditions in the downcomer of a pressurized water nuclear reactor were simulated, to study coolant mixing inside the primary circuit. This was done using computational dynamics software Ansys CFX. The nuclear reactor in Krško (Slovenia) was used as a basis for the model. The downcomer geometry was simplied for a more feasible study. Three separate simulations were done: one with normal conditions, one with loss of coolant accident conditions and one with a modified geometry. The flow was then studied at different condition at the same levels using velocity contours. The results showed that the axial velocity profiles at the downcomer outlet are not completely uniform. V diplomski nalogi so bile simulirane tokovne razmere in pogoji v povratnem kanalu tlačnovodnega jedrskega reaktorja, z namenom proučevanja mešanja hladila v primarnem krogu. Uporabljena je bila programska oprema Ansys CFX. Kot osnova modela je bil uporabljen jedrski reaktor elektrarne Krško v Sloveniji. Geometrija kanala je bila za potrebe enostavnešje simulacije poenostavljena. Narejene so bile tri različne simulacije: prva z normalnimi obratovalnimi pogoji, druga z nesrečo izgube hladila in tretja s spremenjeno geometrijo. Tok je bil proučevan na istih višinskih nivojih z uporabo hitrostnih profilov. Rezultati so pokazali, da hitrostno polje aksialne hitrosti tudi na iztoku kanala ni popolnoma enakomerno. Nuclear Power Plant Pressurized Water Reactor Downcomer Flow simulation Ansys CFX Tlačnovodni jedrski reaktor Povratni kanal Simulacija toka Ansys CFX true true false [A. Kekec] Angleški jezik Slovenski jezik Diplomsko delo/naloga 2021-08-17 16:04:40 2021-10-13 15:35:20 2022-08-09 22:02:50 0000-00-00 00:00:00 2021 0 Maribor 0 Maribor IX, 35 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.039.577(043.2) 86534915 UN_Kekec_Aljaz_2021.pdf UN_Kekec_Aljaz_2021.pdf 1 A62FE53F05E031605AA9D3415CBF8E4E 65b2fd7a5cfeeab349eb75258f3c99a9979d6b26fdd3f6c13d039fc46f2b9a63 7f0e8b26-058d-11ec-b44e-00155d581298 20.500.12556/dkum/b1f78f2d-4440-488b-9aa8-dd027d193c2a https://dk.um.si/Dokument.php?lang=slv&id=152294 Fakulteta za strojništvo 0 0 0