Spacer grid of a nuclear fuel assembly

The present invention relates to a support lattice of a nuclear fuel assembly, which can be manufactured by using 3D printing with high design freedom without sheet metal processing or welding processing. The support lattice of a nuclear fuel assembly of the present invention has hollow lattice cell...

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Bibliographic Details
Main Authors NAM CHAE YOUNG, PARK NAM GYU, WOO HAN GIL, RYU JOO YOUNG
Format Patent
LanguageEnglish
Korean
Published 23.02.2021
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Summary:The present invention relates to a support lattice of a nuclear fuel assembly, which can be manufactured by using 3D printing with high design freedom without sheet metal processing or welding processing. The support lattice of a nuclear fuel assembly of the present invention has hollow lattice cells (110) with an inner wall (111), arranged in a square lattice structure and connected by touching each other externally. The lattice cell (110) comprises: a plurality of elastic support parts (112) which are formed to protrude and curve inwardly from the inner wall (111) and which elastically support a fuel rod (10) as at least three elastic support parts are arranged equiangularly; and a plurality of inner mixing vanes (113), an upper end of which is formed to protrude and spiral along the inner wall above the elastic support parts (112). 본 발명은 판금 가공 및 용접 가공을 배제하고 설계 자유도가 높은 3D 프린팅을 이용하여 제작이 가능한 핵연료 집합체의 지지격자에 관한 것이다. 본 발명의 핵연료 집합체의 지지격자는, 내측 벽(111)을 갖는 중공의 격자 셀(110)들이 정방형 격자(square lattice) 구조로 배치되어 서로 외접하여 연결되며, 상기 격자 셀(110)은, 내측 벽(111)에서 내측으로 만곡되어 돌출 형성되되, 적어도 3 개 이상이 등각으로 배치되어 연료봉(10)을 탄성 지지하게 되는 복수 개의 탄성 지지부(112)와; 상기 탄성 지지부(112)의 상단 내측 벽을 따라서 상측 선단부가 나선형으로 선회하여 돌출 형성된 복수 개의 인너 믹싱 베인(113)을 포함한다.
Bibliography:Application Number: KR20190098750