Seismic Analysis for Decay Tank of Research Reactor

The coolant passing through the reactor core contains many types of radionuclides. N-16, one of them, governs the coolant radioactivity at the core exit, but it has a very short decay time. Specifically, to reduce the level of N-16 radioactivity, the reactor outlet PCS pipe is connected to decay tank immediately after it penetrates the pool. The decay tank is designed to provide enough transit time to ensure that the N-16 radioactivity decreases to a level similar to those of the other radionuclides before the coolant leaves the Decay tank shielding room by expanding the coolant path. In this study, seismic analysis is conducted through response spectrum analysis with FRS. Structural integrity of the Decay tank when SSE occurs is ensured