Spacer grid of a nuclear fuel assembly

The present invention relates to a spacer grid of a nuclear fuel assembly, which can be manufactured using three-dimensional printing with a high degree of design freedom, excluding sheet metal processing and welding processing and which can simplify a structure, improve impact strength, and reduce...

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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 12.03.2021
Subjects
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
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Summary:The present invention relates to a spacer grid of a nuclear fuel assembly, which can be manufactured using three-dimensional printing with a high degree of design freedom, excluding sheet metal processing and welding processing and which can simplify a structure, improve impact strength, and reduce pressure drop. In the spacer grid of the nuclear fuel assembly of the present invention, hollow cylindrical lattice cells (110) having an inner wall (111) are arranged in a lattice structure and are connected to each other in a circumscribed manner, and the lattice cells (110) protrude from the inner wall and spirally rotate in a central axis direction, wherein the lattice cells (110) include an elastic vane (120) having a cross-section with an arc shape and supporting a fuel rod. 본 발명은 판금 가공 및 용접 가공을 배제하고 설계 자유도가 높은 3D 프린팅을 이용하여 제작이 가능하며, 구조를 단순화하고 충격강도를 향상하고 압력강하를 저감할 수 있는 핵연료 집합체의 지지격자에 관한 것이다. 본 발명의 핵연료 집합체의 지지격자는, 내측 벽(111)을 갖는 중공의 원기둥 형상의 격자 셀(110)들이 격자(lattice) 구조로 배치되어 서로 외접하여 연결되며, 상기 격자 셀(110)은, 상기 내측 벽에서 돌출되어 중심축 방향으로 나선형으로 선회하여 형성되되, 횡단면이 원호 형상을 갖고 연료봉을 지지하게 되는 탄성 베인(120)을 포함한다.
Bibliography:Application Number: KR20210026505