Open AccessHFIR vessel probabilistic fracture mechanics analysis
Author(s) -
R.D. Cheverton,
T.L. Dickson
Publication year - 1997
Language(s) - English
Resource type - Reports
DOI - 10.2172/654200
Subject(s) - embrittlement , pressure vessel , reactor pressure vessel , fracture toughness , probabilistic logic , nuclear engineering , fracture mechanics , materials science , structural engineering , forensic engineering , engineering , computer science , composite material , artificial intelligence
The life of the High Flux Isotope Reactor (HFIR) pressure vessel is limited by a radiation induced reduction in the material`s fracture toughness. Hydrostatic proof testing and probabilistic fracture mechanics analyses are being used to meet the intent of the ASME Code, while extending the life of the vessel well beyond its original design value. The most recent probabilistic evaluation is more precise and accounts for the effects of gamma as well as neutron radiation embrittlement. This analysis confirms the earlier estimates of a permissible vessel lifetime of at least 50 EFPY (100 MW)