Spacer grid of a nuclear fuel assembly

• Main Authors: NAM CHAE YOUNG, LEE JIN SUK, WOO HAN GIL, RYU JOO YOUNG
• Format: Patent
• Language: English; Korean
• Published: 19.05.2022
• Subjects: ADDITIVE MANUFACTURING TECHNOLOGY; ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR REACTORS; PERFORMING OPERATIONS; PHYSICS; TRANSPORTING

The present invention relates to a support lattice of a nuclear fuel assembly, which is manufactured by using 3D printing with a high degree of design freedom without sheet metal processing and welding processing. The present invention provides the support lattice of the nuclear fuel assembly, which is a support lattice for supporting a fuel rod of the nuclear fuel assembly, wherein the support lattice has a square planar structure in which a plurality of lattice cells (110) where a fuel rod (10) is located in a diagonal direction are formed, and lattice cells (110) that are adjacent to each other are formed with a streamlined flow path hole (111) spirally twisted in a longitudinal direction so that a center of the fuel rod (10) makes contact with an inner lattice surface (112) forming the streamlined flow path hole (111) within each of the lattice cells (110). 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, 핵연료 집합체의 연료봉을 지지하게 되는 지지격자에 있어서, 사선 방향으로 연료봉(10)이 위치하게 되는 다수의 격자 셀(110)이 형성되는 정방형의 평면 구조를 가지며, 서로 이웃한 격자 셀(110)은 종방향을 따라서 나선형으로 비틀림을 갖는 유선형 유로홀(111)이 형성되어 상기 연료봉(10)은 각 격자 셀(110) 내에서 상기 유선형 유로홀(111)을 형성하게 되는 내측 격자 면(112)과 중앙에서 접촉이 이루어진다.