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Title: Effects of the air–steam mixture on the permeability of damaged concrete

Massive concrete structures such as the containments of nuclear power plant must maintain their tightness at any circumstances to prevent the escape of radioactive fission products into the environment. In the event of an accident like a Loss of Coolant Accident (LOCA), the concrete wall is submitted to both hydric and mechanical loadings. A new experimental device reproducing these extreme conditions (water vapor transfer, 140 °C and 5 bars) is developed in the GeM Laboratory to determine the effect of the saturation degree, the mechanical loading and the flowing fluid type on the concrete transfer properties. The experimental tests show that the previous parameters significantly affect the concrete permeability and the gas leakage rate. Their evolution as a function of the mechanical loading is characterized by two phases that are directly related to concrete microstructure and crack development.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [1]
  1. LUNAM Université, Institut de Recherche en Génie Civil et Mécanique (GeM UMR CNRS 6183), Centrale Nantes, 1 rue de la Noe, BP 92101, F-44321 CEDEX 3 Nantes (France)
  2. LMT/ENS Cachan/CNRS UMR 8535/UPMC/PRES Université Sud Paris, Cachan (France)
  3. LUNAM Université, Institut de Recherche en Génie Civil et Mécanique (GeM UMR CNRS 6183), IUT de Saint Nazaire, 58 rue Michel Ange, BP 420 Heinlex, F-44600 Saint-Nazaire (France)
Publication Date:
OSTI Identifier:
22224344
Resource Type:
Journal Article
Resource Relation:
Journal Name: Cement and Concrete Research; Journal Volume: 54; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 42 ENGINEERING; CONCRETES; CONTAINMENT; CRACKING; FISSION PRODUCTS; FLUID FLOW; LOSS OF COOLANT; MICROSTRUCTURE; MIXTURES; NUCLEAR POWER PLANTS; PERMEABILITY; SATURATION; WATER VAPOR