A Diverse Monitoring for Post-Accident using Alternative Powers
Abstract »After the Fukushima accident, nuclear industry has launched quite exhaustive research projects to address safety challenges in in Beyond Design Basis Accident (BDBA). It has been suggested that the Severe Accident Management Guidelines (SAMG) could only be useful if the monitoring of critical parameters is somehow made available to the operator, even in SBO condition . The objective of this research is to develop and demonstrate advanced technologies for condition monitoring, diagnosis, remote sensing, and safety actuation during beyond design-basis events (DBEs) in operating nuclear plants and next-generation reactors. Effective mitigation of a beyond design-basis accident is receiving increased scrutiny in light of the accident at the Fukushima Daiichi nuclear power plant.
A major task of this research is to develop self-powered sensors that can function under a loss of power event, and to incorporate them with plant communication for data transmission and remote actuation. Design of a sensor network to optimize fault monitoring is part of the research effort with applications to a typical PWR. This research will focus on demonstrating a variety of monitoring methods using low-frequency and wide-band data and developing self-powered sensors, a sensor network strategy, and data communication and control. Through the I-NERI collaboration research project, the Korean and U.S. collaborators develop and integrate monitoring and diagnostics methods and demonstrate techniques and measurement strategies for selected safety-related equipment.