Experiment Data Report for Semiscale Mod-3 Lower Plenum Injection Test S-07-8 (Baseline Test Series)

摘要

Recorded test data are presented for Test S-07-8 of the Semiscale Mod-3 test series. This test is one of several Semiscale Mod-3 experiments conducted to investigate thermal and hydraulic phenomena accompanying a hypothesized loss-of-coolant accident in a pressurized water reactor (PWR) system. Test S-07-8 was conducted from initial conditions of 15.7 MPa and 556 K to investigate the response of the Semiscale Mod-3 system to a blowndown transient following a simulated double-ended offset shear of the broken loop cold leg piping. The specific objective was to provide reference data to evaluate integral blowdown and reflood behavior during a 200% cold leg break with emergency core coolant (ECC) injection into the vessel lower plenum of the Mod-3 system. The purpose is to make available the uninterpreted data from Test S-07-8 for future data analysis. The data presented in the form of graphics in engineering units have been analyzed only to the extent necessary to ensure that they are reasonable and consistent.