20.500.12556/RUL-161064 Loss of feedwater accident simulation in VVER 1000 using APROS master’s thesis The purpose of this thesis was to develop a model of the VVER1000 reactor in APROS, sufficient for Loss of Normal Feedwater (LONF) accident with combined Loos of Offsite Power (LOOP) analysis. The Loss of Normal Feedwater analysis is classified as an Anticipated Operational Occurrence (AOO) and as such is expected to happen at least once during a nuclear power plant's lifetime. Therefore, it has to be demonstrated that the LONF accident will not lead to further degradation of the power plant’s condition. The conducted calculations confirm the VVER1000 reactor system's capability of sufficient energy removal from the Reactor Coolant System (RCS) throughout the transient. The acceptance criteria of not overpassing the design RCS pressure, main steam lines design pressure and maximum pressurizer level have been met during the whole simulation period. Additionally, it has been concluded that APROS is capable of modeling the main components of the VVER1000 primary and secondary systems, as well as physical phenomena occurring in them during the simulated transient. At last, a need for further research on reverse flow in the VVER1000 primary system loops during LONF has been identified. nuclear engineering nuclear reactors accidents loss of normal feedwater deterministic safety analysis horizontal steam generator VVER1000 jedrska tehnika jedrski reaktorji nesreče izguba napajalne vode deterministična varnostna analiza horizontalni uparjalnik VVER1000 true false false M. M. Bawołek Angleški jezik Slovenski jezik Magistrsko delo/naloga 2024-09-06 12:32:46 2024-09-06 12:32:48 2025-08-08 13:41:30 0000-00-00 00:00:00 2023 0 Lappeenranta 2023 Lappeenranta 1 spletni vir (1 datoteka PDF ([108] str.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.039.58 204069123 https://lutpub.lut.fi/handle/10024/166783 1 58efbd0d-6c3b-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=189924 LJ_WEC_BAWOLEK_MASTER_THESIS_verified.pdf LJ_WEC_BAWOLEK_MASTER_THESIS_verified.pdf 1 13B7C0F6FC42322AA09EDABC3809AC04 ad13abf8d8199cce2ba439ec7ead7961b0ec398ebdb3b03fb94d35598b4a4f41 a7532d58-6c3b-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=189925 Fakulteta za matematiko in fiziko 0 0 0