[en] In Kawasaki Heavy Industries Ltd., the works of developing and perfecting the analysis codes related to high temperature gas-cooled reactors has been made. For the main purpose of obtaining the data verifying the flow analysis codes accumulated so far, the flow experiment setup simulating an emergency core cooler for a high temperature gas-cooled reactor was recently completed, therefore its outline including the plan of verifying the analysis code is reported. The basic plan of the experimental setup was decided as follows. Three-dimentional flow distribution can be measured. Considering the easiness of experiment, the air at normal pressure is used. The object of simulation is the entrance and heat transferring part of the emergency core cooler, into which unmixed gas flows from the exit of the core. The testing part is made of transparent acryl so that the state of experiment can be easily confirmed. The internal part can be taken out so that its form can be easily changed. The installation was completed in 1985, and the acquisition of data is finished in 1986. A three-dimensional turbulent flow analysis code RAN has been newly developed. (Kako, I.)