Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Spacer Grid Assembly with Sliding Fuel Rod Support

삽입 및 이동 가능한 연료봉 지지부의 지지격자 형상

  • Received : 2009.12.23
  • Accepted : 2010.05.05
  • Published : 2010.07.01
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Abstract

A spacer grid assembly is one of the most important structural components of the nuclear fuel assembly of a Pressurized Water Reactor (PWR). A primary design requirement is that the fuel rod integrity be maintained by the spacer grid assembly during the operation of the reactor. In this study, we suggested a new spacer grid assembly having a fuel rod support, which is capable of sliding when the fuel rod vibrates due to flow-induced vibrations in the reactor. By adjusting the relative displacement between the fuel rod and its support, the proposed design will help in reducing fuel rod fretting damage.

지지격자체는 경수로 핵연료집합체의 가장 중요한 핵심 구조부품이다. 지지격자체 설계시의 고려사항은 원자로 운전중에 연료봉의 지지건전성을 유지하도록 하는 것이다. 본 연구에서는 연료봉이 유동기인진동에 의해서 진동할 때 연료봉과 연료봉 지지부 사이에서 상대변위를 완화해 줌으로서 연료봉의 프레팅 마모손상 가능성을 감소시킬 수 있는 이동 가능한 연료봉 지지부로 구성된 새로운 지지격자체 형상을 제안하였다. 아울러 제안된 이동 가능 지지부의 연료봉 지지특성을 유한요소해석을 통해 분석하였다.

Keywords

References

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Cited by

  1. Study on Characteristics of Sliding Support for Fuel Rod vol.35, pp.2, 2011, https://doi.org/10.3795/KSME-A.2011.35.2.201