Examination of Repeatability in Reflood Phenomena under Forced Flooding in SCTF Core-I Tests

摘要

The slab core test program is a part of the large scale reflood test program together with the cylindrical core test program and the major purpose is to investigate the two dimensional thermo-hydrodynamic behavior in the core and the effect of fluid communication between the core and the upper plenum on the reflood phenomena. In order to check repeatability in tested phenomena, two pairs of repetition tests were performed and compared. Repeated thermo-hydraulic phenomena were identified. Peculiar behavior of some data was examined. As the result, it was found that thermo-hydraulic behavior such as core cooling from the bottom had satisfactory repeatability and that most of the peculiar behavior also had repeatability. Reliability of some advanced instruments was also checked with the use of repeatable phenomena. Some of the instruments showed poor repeatability and are required improvement. (Atomindex citation 16:018398)