Abstract
ABSTRACTIn this thesis, we use the 1st, 2nd and 4th Nuclear Power Plants as our research studies. We use the TRACE tool to build a CONTAN module. We use the CONTAN module to simulate the suppression pool. When MSIV Closure occurs at 100 % power, the SRV’s will open and steam will flow into the suppression pool. This thesis focuses on the analysis of suppression pool with MSIV Closure occurring at 100 % power (ATWS).Anticipated Transient Without Scram, abbreviated as ATWS, means an anticipated operational occurrence followed by failure of the Reactor Protection System. Anticipated operational occurrences (AOOs), are expected to occur one or more times during the life of a nuclear power unit. The integrated ATWS prevention and mitigation features are designated as a Redundant Reactivity Control System. In this thesis, we will focus on (1) Alternate Rod Insertion (ARI) and Fine Motion Control Drive (FMCRD), and (2) automatic SLCS.By using the TRACE CONTAN module, we will prove that the test results of ATWS performance evaluation stay within FSAR and design margin. We will use RETRAN as an auxiliary tool to verify our studies. We will use the RETRAN output of steam flow from SRV with MSIV Closure occurring at 100 % power ATWS as the input for the TRACE model. We will verify that our results stay within the most limiting values.In conclusion, we will analyze the impacts of ARI, FMCRD, and SLCS on nuclear power plant safety. This thesis can also be used as a reference for Chinshan, Kuosheng and Lungmen plants’ ATWS analysis in the future.