Spacer grid of a nuclear fuel assembly to reduce high frequency vibration

• Main Authors: KIM SEONG-SOO, PARK JOON-KYOO, EOM KYONG-BO, HA DONG-GEUN, KIM JIN-SUN, RYU JOO-YOUNG, JEON SANG-YOUN, SUH JUNG-MIN, KWON OH-JOON
• Format: Patent
• Language: Chinese; English
• Published: 12.02.2014
• Subjects: GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR REACTORS; PHYSICS; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention relates to a spacer grid for a nuclear fuel assembly to prevent high frequency vibration, and by improving a grid strip structure constituting the spacer grid, high frequency vibration caused by fluid is reduced. In the spacer grid of the nuclear fuel assembly comprising dimples or grid springs for supporting fuel rods, the spacer grid consists of a plurality of flat plate type grid strips (110) which form lattice cells, and the grid strips (11) are provided with at least one long-hole-shaped slot independent of the shallow recess D or the grid spring and formed in a flat plate area in a penetrating manner, so that various vibration characteristics of the grid can be set, and thus high frequency vibration caused by fluid can be reduced.