Direct spring loaded pressure relief valve(DSLPRV) is a safety valve to relax surge pressure of the pipeline system. DSLPRV is one of widely used safety valves for its simplicity and efficiency. However, instability of the DSLPRV can caused by various reasons such as insufficient valve volume, natural vibration of the spring, etc. In order to improve reliability of DSLPRV, proper selection of design factors of DSLPRV is important. In this study, methodology for selecting design factors for DSLPRV was proposed. Dynamics of the DSLPRV disk was integrated into conventional 1D surge pressure analysis. Multi-objective genetic algorithm was also used to search optimum design factors for DSLPRV.

ABSTRACT
 1. 서 론
 2. 연구방법
  2.1 스프링 서지 완화 밸브의 동적 응답 특성
  2.2 1차원 서지압 해석 방법
  2.3 다목적 유전자 알고리즘(Multi-objective geneticalgorithm)
 3. 결과 및 고찰
 4. 결 론
 기호설명
 사 사
 References

• 김현준(부산대학교 환경공학과, Department of Environmental Engineering, Pusan National University) | Hyunjun Kim
• 백다원(부산대학교 환경공학과, Department of Environmental Engineering, Pusan National University) | Dawon Baek
• 김상현(부산대학교 환경공학과, Department of Environmental Engineering, Pusan National University) | Sanghyun Kim Corresponding author