In order to measure the flow rate of liquid sodium, the flow measurement method should be determined by considering the opacity of sodium, the chemical reaction with air and water, and so on. By using the segmental wedge flowmeter which is one of the representative devices for flow measurement, the methodology for measuring the liquid sodium flow was examined and the flow characteristics were observed. The variations of the discharge coefficients according to various flow conditions were also evaluated. In addition, the structural integrity at high temperature condition was evaluated by using the liquid sodium as a working fluid and these study results were reflected in the design of the segmental wedge flowmeter.

ABSTRACT
1. 서 론
2. 유출계수 평가
    2.1 분절형 웻지 유량계의 측정 원리
    2.2 유출계수 평가 결과
3. 고온 구조건전성 평가
    3.1 평가 개요
    3.2 해석범위 및 해석모델
    3.2 경계조건 및 하중조건
    3.3 해석결과 및 평가단면 선정
    3.4 구조건전성 평가
4. 결 론
References

• 윤정(Innovative System Technology Development Div., Korea Atomic Energy Research Institute(KAERI)) | Jung Yoon Corresponding Author
• 조재훈(Innovative System Technology Development Div., Korea Atomic Energy Research Institute(KAERI)) | Jae-Hun Cho
• 이제환(Innovative System Technology Development Div., Korea Atomic Energy Research Institute(KAERI)) | Je-Hwan Lee