Key design study of large FBR, IV; Probabilistic fracture mechanics analysis code CANIS-P

Furuhashi, Ichiro*; Watashi, Katsumi

A probabilistic fracture mechanics analysis code CANIS-P was developped for reliability evaluation of FBR structural components. The CANIS-P code has following aspects. (1)Compute failure probability of a structure with a semi-elliptical surface crack. (2)Can treat plate, cylinder with circumferential or axial crack. (3)Statistical distributions of initial crack shape and material properties. (4)Many failure criterions such as geometrical codition, net-section collapse, brittle fracture and tearing instability. (5)Fatigue crack growth by K or J. (6)Many reference K-solutions for computation of K and elastic J. (7)Simplified reference stress method for computation of elasto-plastic J. (8)Creep crack growth based on creep J-integral range J. (9)Simplified reference stress method for computation or J. (10)Can treat hydrostatic proof test, PSI, ISI, leak detection and earthquake. (11)Leak rate computation by simple formula at PWR condition, or by elasto-plastic crack opening area and Bernoulli's formula. We can use CANIS-P aiming following works. (1)Reliability evaluation or failure probability evaluation of FBR structural components. (2)Get key parameters that enough sensitive on failure probabilities. (3)Research of best structures and best operating schedules considering economical costs and reliabilities. This report describes physical/mathematical models, probabilistic/statistic models, a user's manual and analysis examples of CANIS-P.