The Effect of the reactor core to the dynamic characteristic of core support barrel

원자로 노심으로 인한 노심지지동체의 동특성 변화에 관한 연구

  • 강형선 (전남대 대학원 기계공학과) ;
  • 반재삼 (전남대 대학원 기계공학과) ;
  • 나상남 (전남대 대학원 기계공학과) ;
  • 조규종 (전남대 기계시스템공학부)
  • Published : 2002.10.01

Abstract

The Core Support Barrel (CSB) is a major component of Reactor Internals, and is designed to support and protect the Reactor Core. In this study, Reactor Core, Core Shroud and CSB were simplified to coaxial cylinders and then the offset of Reactor Core & Core Shroud to the dynamic characteristic of CSB was analyzed. For the beam modes, natural frequencies of the cantilevered cylinder are compared with those of the cantilevered beam. And it was found out that shear modulus must be used correctly to convert the shell model to the equivalent beam model. From the dynamic characteristics of the beam model, it was found out that natural frequencies are proportional to the length of Reactor Core & Core Shroud and inversely proportional to the mass. From the comparison with the dynamic characteristics of a beam model and a lumped-mass model it was found out that the size of lumped-mass must be determined considering both the length and the mass of Reactor Core & Core Shroud.

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