Consortium for Advanced Simulation of LWRs
نویسندگان
چکیده
This paper describes a multi-scale modeling approach to compute the large-strain deformation of zirconium alloy cladding, which is of interest to the study of fuel rod behaviors in transient and accident conditions. A Visco-Plastic Self-Consistent (VPSC) polycrystal plasticity model representing polycrystals by weighted orientations of single crystals has been implemented as the constitutive law in a finite element fuel code BISON-CASL to model the deformation of αphase zirconium alloy cladding. Result of a benchmark test case has verified the functionality of the VPSC model in the BISON-CASL code. A demonstration case representing the geometry of a segment of cladding tube under constant rod internal pressure and imposed temperature ramp was prepared to simulate the thermal and mechanical loads in a postulated LOCA condition, and the case has been tested using BISON-CASL. Results have demonstrated the code’s capability of modeling of large localized deformation of cladding tube due to temperature variation in a postulated LOCA condition.
منابع مشابه
Consortium for Advanced Simulation of LWRs
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