The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 2015
Filed:
Oct. 10, 2012
Kepco Nuclear Fuel Co., Ltd., Daejeon, KR;
Joo Young Ryu, Daejeon, KR;
Jung Min Suh, Daejeon, KR;
Sang Youn Jeon, Daejeon, KR;
Kyong Bo Eom, Daejeon, KR;
Joon Kyoo Park, Daejeon, KR;
Dong Geun Ha, Daejeon, KR;
Jin Sun Kim, Daejeon, KR;
Seong Soo Kim, Daejeon, KR;
Oh Joon Kwon, Seoul, KR;
KEPCO NUCLEAR FUEL CO., LTD., Daejeon, KR;
Abstract
Disclosed herein is a spacer grid for a nuclear fuel assembly. The spacer grid has dimples for supporting fuel rods and is formed from grid strips which are assembled in a lattice shape to form lattice cells. Each grid strip has at least one hole which is formed separately from the dimples. Therefore, when coolant is drawn into the fuel assembly, a pressure difference between opposite sides of the holes is reduced, and friction generated between cut edges of the holes and the coolant reduces the magnitude of the vibration and causes a damping effect, thus reducing flow-induced vibration. The hole formed in the grid strip function to widen the range of the frequency of the flow-induced vibration caused by vortex sheddings formed around the edges of the grid strip, thus reducing the possibility of the generation of resonance with the natural frequency of the spacer grid.