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Title: Characterization of Radiation Fields in Biological Shields of Nuclear Power Plants for Assessing Concrete Degradation

Life extensions of nuclear power plants to 60 and potentially 80 years of operation have renewed interest in long-term material degradation. One material being considered is concrete with a particular focus on radiation-induced effects. Based on the projected neutron fluence (E > 0.1 MeV) values in the concrete biological shields of the US PWR fleet and the available data on radiation effects on concrete, some decrease in mechanical properties of concrete cannot be ruled out during extended operation beyond 60 years. An expansion of the irradiated concrete database and a reliable determination of relevant neutron fluence energy cutoff value are necessary to assure reliable risk assessment for NPPs extended operation.
 [1] ;  [1] ;  [1] ;  [2]
  1. ORNL
  2. Oak Ridge National Laboratory (ORNL)
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Conference: 15th International Symposium on Reactor Dosimetry (ISRD-15), Aix-en-Provence, France, 20140518, 20140523
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
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Country of Publication:
United States