STUDY OF DRASTIC SIMPLIFICATION OF ABOVE CORE STRUCTURES (STUDY OF ELEVATABLE ABOVE CORE STRUCTURES )

摘要

Elevatable Above Core Structures (EACS) arernexpected to be effective in decreasing the plant costsrnof commercial utilization of FBR plant, because theyrncan eliminate the rotating plugs which dictate the sizernof the reactor vessel diameter. The objectives of thisrnstudy are to evaluate the feasibility of the EACSrnconceptual design and carry out flow inducedrnvibration tests of the shell-less ACS model.rnReflecting the result of FIV tests, vibrationrnproperties were estimated by analysis of actual plantrnconditions. The result predicted low flow inducedrnforce on baffle plate. Consequently, it is expected thatrnrattle vibration will be prevented by the friction forcernof the baffle plate on actual plant condition.