%A"Scott, Paul" %A"Kurth, Robert" %A"Cox, Andrew" %A"Olson, Rick [Battelle Columbus (United States)]" %A"Rudland, Dave [Nuclear Regulatory Commission (United States)]" %D2010 %I; Swedish Radiation Safety Authority, Stockholm (Sweden) %2 %J[] %K22 GENERAL STUDIES OF NUCLEAR REACTORS, LOSS OF COOLANT, PROBABILISTIC ESTIMATION, PIPES, FAILURES, P CODES, CRACKS, STRESS CORROSION, CORROSION FATIGUE, LEAK DETECTORS, RUPTURES %PMedium: ED; Size: 194 p. pages %TDevelopment of the PRO-LOCA Probabilistic Fracture Mechanics Code, MERIT Final Report %XThe MERIT project has been an internationally financed program with the main purpose of developing probabilistic models for piping failure of nuclear components and to include these models in a probabilistic code named PRO-LOCA. The principal objective of the project has been to develop probabilistic models for piping failure of nuclear components and to include these models in a probabilistic code. The MERIT program has produced a code named PRO-LOCA with the following features: - Crack initiation models for fatigue or stress corrosion cracking for previously unflawed material. - Subcritical crack growth models for fatigue and stress corrosion cracking for both initiated and pre-existing circumferential defects. - Models for flaw detection by inspections and leak detection. - Crack stability. The PRO-LOCA code can thus predict the leak or break frequency for the whole sequence of initiation, subcritical crack growth until wall penetration and leakage, instability of the through-wall crack (pipe rupture). The outcome of the PRO-LOCA code are a sequence of failure frequencies which represents the probability of surface crack developing, a through-wall crack developing and six different sizes of crack opening areas corresponding to different leak flow rates or LOCA categories. Note that the level of quality assurance of the PRO-LOCA code is such that the code in its current state of development is considered to be more of a research code than a regulatory tool. %0Technical Report %NSSM-2010-46;Other: Project SSM 2008/37; ISSN 2000-0456; TRN: SE1108011 %1 %CSweden %Rhttps://doi.org/ Other: Project SSM 2008/37; ISSN 2000-0456; TRN: SE1108011 SWDN %GEnglish