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概要

There are various leak phenomena in nuclear power plants, such as thermal or vibration fatigue crack, grand of valve, valve sheet, mechanical seal and SG tubes, and so on. In the current power plant, engineers should find such probl ems by annual inspection. But, in case of severe accident, operators should conduct a prompt action without mistake. It is very difficult to do such action with limited information and AM tools. Therefore, authors have conducted to develop online leak rate evaluation method for such various leak phenomena. The system will notice such troublesome by a robotics image on a large screen. The system has a knowledge base evaluation system by using a plant simulator with reactor physics and thermal hydraulics models, and this system advice operator to have an action with guidelines information. In this paper, leak rate evaluation method is shown based on the NUCIA trouble data of actual NPPs.

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