Checking piling up status of water stop material, as viewed from monitoring window on the testing device.
corium
Grouting construction (placing by the tremie method)
Cement-based water stop material used for the test this time (plastic grout)
Sampling test for quality control during placement of water stop material
Placement of water stop material
Branch pipes to collect sample for quality control test during grouting and material storage facility
Simulated portion of vent header for testing device (when water leaks)