급수가열기 충격판 설계변경에 따른 동체감육 완화에 관한 유동해석 연구

• 영문명: A Study on the Fluid Mixing Analysis for the Shell Wall Thinning Mitigation by Design Modification of a Feedwater Heater Impingement Baffle
• 발행기관: 한국시뮬레이션학회
• 저자명: 김경훈(K. H. Kim) 황경모(K. M. Hwang) 진태은(T. E. Jin)
• 간행물 정보: 『한국시뮬레이션학회 논문지』제14권 제2호, 35~43쪽, 전체 9쪽
• 주제분류: 공학 > 기타공학
• 파일형태: PDF
• 발행일자: 2005.06.30

영문 초록

Feedwater heaters of many nuclear power plants have recently experienced wall thinning damage, which will increase as operating time progresses. As it is judged that the wall thinning damages have generated due to local fluid behavior around the impingement baffle installed in downstream of the high pressure turbine extraction steam line to avoid colliding directly with the tubes, numerical analyses using PHOENICS code were performed for two models with original clogged impingement baffle and modified multi-hole impingement baffle. To identify the relation between wall thinning and fluid behavior, the local velocity components in x-, y-, and z-directions based on the numerical analysis for the model with the clogged impingement baffle were compared with the wall thickness data by ultrasonic test. From the comparison of the numerical analysis results and the wall thickness data, the local velocity component only in the y-direction, and not in the x- and z-direction, was analogous to the wall thinning configuration. From the result of the numerical analysis for the modified impingement baffle to mitigate the shell wall thinning, it was identified that the shell wall thinning may be controlled by the reduction of the local velocity in the y-direction.

목차

1. 서론

2. 해석모델 구성

3. 경계조건 및 수치해석

4. 유동해석 결과

5. 결 론

참고문헌

키워드

급수가열기 추기증기 IB 충격판 막힌충격판 다공충격판 Feedwater Heater Extraction Steam Impingement Baffle Clogged IB Multi-hole IB