Evolution of methodology to evaluate and improve safety margin and ROSA programmes at JAERI

摘要

This poster presents an overview of JAERI's experimental research activities related to safety margin evaluation and improvement before and after TMI. The evolution of the different versions of ROSA codes is given. ROSA-IV program objectives and approaches, as well as Large Scale Test Facility (LSTF). Major results of ROSA-IV program are presented, concerning the following topics: experimental study of postulated small-break LOCAs and abnormal transients, experimental simulation of plant abnormal occurrences and assessment and improvement of LOCA computer codes. The role of ROSA-V program for for prevention of severe core damage in beyond-design-basis accident situation is stressed. The design features of ROSA-AP600 program and LSTF modifications for AP600 experiment are also discussed. 26 figs., 2 tabs. (Atomindex citation 27:045260)