9.5 Experimental and Analytical Study on Aerosol Behavior in WIND Project

摘要

The tests on fission product (FP) behavior in piping under severe accidents are being conducted in the WIND Project at JAERI to investigate the piping integrity which may be threatened by decay heat from deposited FPs. In order to obtain the background information for future WIND experiment and to confirm the analytical capabilities of the FP behavior analysis codes, ART developed by JAERI and VICTORIA by SNL, the FP behavior in safety relief valve (SRV) line of BWR during station blackout without all feed water (TQUX) sequence was analyzed. The analyses showed that the mechanisms that control the FP deposition and transport agreed well between the two codes. However, it was also found that the differences in models such as diffusiophoresis or turbulence, the treatment of chemical forms and aerosol mass distribution may affect the deposition in piping and, consequently, on the source terms.