As one of the specific applications of Living PSA, Risk Monitor, which is a real-time analysis tool used to determine the instantaneous risk based on actual plant configuration, has been widely used in risk-informed decision-making process during plant operation. A web-based Risk Monitor application for Tianwan nuclear power plant (NPP) is currently being used onsite to improve the PSA applications, popularize the concept of risk-informed management, and then enhance the whole risk management level in Tianwan NPP. Compared with the traditional windows based tools, this web-based Risk Monitor application is a natural multi-user program with great advantages. It has good interface with plant's existing information system and can automatically update the risk information upon changes of component status/configurations. This paper presents the overview of the Risk Monitor application used in Tianwan NPP, including challenges and experience of implementing Web-based Risk Monitor, and major feature improvements which facilitate the application of Risk Monitor. Example PSA applications implemented in Tianwan NPP will also be presented together with future plan and challenges.