OECD MCCI Project: Category 4 Integral Test to Validate Severe Accident Codes: Core-Concrete Interaction Test Six (CCI-6) Test Plan (Rev. 6)

OECD MCCI Project: Category 4 Integral Test to Validate Severe Accident Codes (Rev. 1, Final Report)

“…Following a description of related studies in the next section, the balance of this final report provides a summary description of the test facility as well a presentation and discussion of results from the experiment. Full details are provided in a dedicated data report prepared for this test [2]. a Based on a calculated melt density of 6640 kg/m 3 .…”

“…Additional details regarding the facility modifications are provided in the balance of this section. A complete description of the apparatus is provided in the test data report [2].…”

“…Other key data recorded by the DAS included temperatures within test section structural sidewalls, off gas temperature and flow rate, and pressures at various locations around the system. Measurement uncertainties for all instruments are provided in the test data report [2].…”

“…Following completion of bulk cooling, the power supply operating mode would be switched from constant power at the initial level of 210 kW (see Table 1-1), to constant voltage. Thus, if significant debris quenching occurred, power supply operation in this mode would approximately maintain the specific power density in the remaining melt constant at the level established prior to cavity flooding (see Appendix B in Reference [2] for a description of the theory behind the constant voltage operating scheme). The test would operate in this manner until the axial ablation depth reached 22.5 cm.…”

“…Then the crust surface remains dark until 24.5 minutes. At this time, a large eruption event is initiated in the northeast corner of the test section, and proceeds almost continuously until ending at 25.9 minutes; the heat flux peaks at 3 MW/m 2 Soon after the burn was completed (i.e. at 0.17 minutes), a hole was melted through the main steamline at the piping Tee directly on top of the test section, leading to a high temperature gas jet discharging into the cell.…”