The structural integrity of system, structure, and components (SSCs) of nuclear power plants (NPPs) are important to ensure their safety under normal operating and transient conditions. Thus, the integrity evaluation is performed in terms of collapse, fatigue, and fracture in the design of SSCs. Typically, the material properties of the design code are conservatively used for the integrity evaluation. However, the material properties including material non-uniformity and applied loading characteristics are required in cases of leak-before-break (LBB) evaluation of piping system and integrity evaluation of SSCs under excessive seismic conditions. Recently, thus, a number of studies are carried out to evaluate the material behaviors under dynamic and cyclic loading and to properly include these material characteristics in the integrity evaluation. This paper reviews the results of these studies.

* 학력
- 1991년 한양대학교 원자력공학과(학사)
- 1993년 KAIST 원자력공학과(석사)
- 1998년 KAIST 원자력공학과(박사)

*주요경력
- 2002년-현재: 조선대학교 원자력공학과 교수
- 2008-2009년: Oak Ridge National Lab.(미) 방문연구원
- 1998-2002년: 한전 전력연구원 선임연구원