LIQUID FILM MEASUREMENT DEVICE AND LIQUID FILM MEASUREMENT METHOD

• Main Authors: WATABIKI NAOHISA, AOYAMA GORO
• Format: Patent
• Language: English
• Published: 08.12.2011
• Subjects: NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR REACTORS; PHYSICS

PROBLEM TO BE SOLVED: To provide a liquid film measurement device capable of measuring liquid film thickness around a circular tube simulating a fuel rod inside a BWR type nuclear reactor under steam-water environment at about 300°C simulating a two-phase flow state inside the BWR type nuclear reactor.SOLUTION: It is considered as a first characteristic that the liquid film measurement device rotates a first magnet rotatably arranged in a first circular tube simulating the fuel rod by a second magnet arranged around the first circular tube and arranged inside a second circular tube simulating the fuel rod, radiates ultrasonic waves from a piezoelectric element arranged in the first circular tube in the radial direction of the first circular tube, and measures the liquid film thickness on the outer surface of the first circular tube. It is considered as a second characteristic that the piezoelectric element is included in a rotatable container, and a communication port in which liquid can enter and exit inside and outside is provided at a part of the first circular tube in which the container is installed.