FIST/T23C, Simulated Failure to Maintain Water Level in BWR/6-218

1 - Description of test facility: BWR/6-218 standard plant. A full size bundle with electrically heated rods is used to simulate the reactor core. A scaling ratio of 1/624 is applied in the design of the system components. Key features of the FIST facility include: (1) Full height test vessel and internals; (2) correctly scaled fluid volume distribution; (3) simulation of ECCS, S/RV, and ADS; (4) level trip capability; (5) heated feedwater supply system, which provides the capability for steady state operation. 2 - Description of test: Test T23C simulates a failure to maintain water level. Inventory loss eventually leads to bundle uncover and fuel rod heat-up. This test investigates system response up to the time when the bundle rod heat-up reaches the FIST heater temperature limit of 1200 deg. F