Analysis of potential for jet-impingement erosion from leaking steam generator tubes during severe accidents.

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This report summarizes analytical evaluation of crack-opening areas and leak rates of superheated steam through flaws in steam generator tubes and erosion of neighboring tubes due to jet impingement of superheated steam with entrained particles from core debris created during severe accidents. An analytical model for calculating crack-opening area as a function of time and temperature was validated with tests on tubes with machined flaws. A three-dimensional computational fluid dynamics code was used to calculate the jet velocity impinging on neighboring tubes as a function of tube spacing and crack-opening area. Erosion tests were conducted in a high-temperature, high-velocity erosion ... continued below

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Majumdar, S.; Diercks, D. R.; Shack, W. J. & Technology, Energy May 1, 2002.

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Description

This report summarizes analytical evaluation of crack-opening areas and leak rates of superheated steam through flaws in steam generator tubes and erosion of neighboring tubes due to jet impingement of superheated steam with entrained particles from core debris created during severe accidents. An analytical model for calculating crack-opening area as a function of time and temperature was validated with tests on tubes with machined flaws. A three-dimensional computational fluid dynamics code was used to calculate the jet velocity impinging on neighboring tubes as a function of tube spacing and crack-opening area. Erosion tests were conducted in a high-temperature, high-velocity erosion rig at the University of Cincinnati, using micrometer-sized nickel particles mixed in with high-temperature gas from a burner. The erosion results, together with analytical models, were used to estimate the erosive effects of superheated steam with entrained aerosols from the core during severe accidents.

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  • Report No.: ANL-01/32
  • Grant Number: DE-AC02-06CH11357
  • DOI: 10.2172/925023 | External Link
  • Office of Scientific & Technical Information Report Number: 925023
  • Archival Resource Key: ark:/67531/metadc896986

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  • May 1, 2002

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

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  • Sept. 28, 2016, 5:58 p.m.

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Majumdar, S.; Diercks, D. R.; Shack, W. J. & Technology, Energy. Analysis of potential for jet-impingement erosion from leaking steam generator tubes during severe accidents., report, May 1, 2002; United States. (digital.library.unt.edu/ark:/67531/metadc896986/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.