PSAM 16 - Paper Overview

PSAM 16 Conference Paper Overview

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Lead Author: Daichi Nagai Co-author(s): Koji Shirai, shirai@criepi.denken.or.jp / Koji Tasaka, kotasaka@criepi.denken.or.jp

Internal Flooding Fragility Experiments using Full-scale Fire Doors to Evaluate Door Failure Water Height and Leakage Flow Rate under Hydrostatic Pressure Loads
The Central Research Institute of Electric Power Industry (CRIEPI) is developing an internal flooding PRA (IF-PRA) guide for nuclear power plants in Japan. One of the questions of interest in the internal-flooding scenario modeling is that of how susceptible to failure structures and components are to the water ingress or spray. In IF-PRA, as doors can be flooding propagation paths, flooding could propagate to adjacent areas through gaps between doors and frames as well as doors opened by static head due to flooding depths. Therefore, it is very important to clarify the characteristics of flooding propagation modeling through doors. CRIEPI has performed hydrostatic pressure tests using one-hour rating fireproof door which is often used in nuclear power plants. In this study, the door which size is about 1.0 m width and 2.1 m height attached to 7.5 m3 rectangular water tank. By filling the tank with water until door swing to open due to the door latch failure, water height and leakage flow rate were measured. According to the test results, we found that the door failure could be occurred when the static head reached around 1.3 m for forward direction while no failure were occurred for opposite direction. Moreover, the leakage flow rate through the gaps of the door perimeter could be also affected by the direction in which the static head loaded on the door.

Internal Flooding Fragility Experiments using Full-scale Fire Doors to Evaluate Door Failure Water Height and Leakage Flow Rate under Hydrostatic Pressure Loads

The Central Research Institute of Electric Power Industry (CRIEPI) is developing an internal flooding PRA (IF-PRA) guide for nuclear power plants in Japan. One of the questions of interest in the internal-flooding scenario modeling is that of how susceptible to failure structures and components are to the water ingress or spray. In IF-PRA, as doors can be flooding propagation paths, flooding could propagate to adjacent areas through gaps between doors and frames as well as doors opened by static head due to flooding depths. Therefore, it is very important to clarify the characteristics of flooding propagation modeling through doors. CRIEPI has performed hydrostatic pressure tests using one-hour rating fireproof door which is often used in nuclear power plants. In this study, the door which size is about 1.0 m width and 2.1 m height attached to 7.5 m3 rectangular water tank. By filling the tank with water until door swing to open due to the door latch failure, water height and leakage flow rate were measured. According to the test results, we found that the door failure could be occurred when the static head reached around 1.3 m for forward direction while no failure were occurred for opposite direction. Moreover, the leakage flow rate through the gaps of the door perimeter could be also affected by the direction in which the static head loaded on the door.

Paper NA252 Preview

Author and Presentation Info

Lead Author Name: Daichi Nagai (nagai3915@criepi.denken.or.jp)

Bio: Daichi Nagai is a research scientist at Central Research Institute of Electric Power Industry (CRIEPI). His work focuses specifically on internal flooding PRA and fire protection engineering. Research interest: Probabilistic risk assessment, multi-hazard PRA .

Country: Japan
Company: Central Research Institute of Electric Power Industry (CRIEPI)
Job Title: Research Scientist

PSAM 16 Conference Paper Overview

Welcome to the PSAM 16 Conference paper and speaker overview page.

Paper NA252 Preview

Author and Presentation Info

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