TOP NOZZLE ASSEMBLY HAVING SPRING POCKET IMPROVED FIXING STABILITY IN A NUCLEAR FUEL ASSEMBLY AND THE MANUFACTURING METHOD THEREOF

• Main Authors: KIM, KYOUNG JOO, PARK, JOON KYOO, PARK, NAM GYU, JEON, KYEONG LAK, SUH, JUNG MIN, KIM, JIN SUN, LEE, JIN SEOK, HA, DONG GEUN, GWON, GI JUN, EOM, KYONG BO
• Format: Patent
• Language: English; Korean
• Published: 02.08.2011
• 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 US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

PURPOSE: A top fixing body for a nuclear fuel assembly and a manufacturing method thereof are provided to stably secure the pushing force of a pushing spring unit by closely adhering a spring groove with the end of the pushing spring unit through a discharge process. CONSTITUTION: A coupling plate is coupled with a guide tube of a nuclear fuel assembly. A string plate(20) is protruded along the frame of the coupling plate and includes a spring clamp on the upper side thereof. A pushing spring unit(100) is mounted on the upper side of the string plate and is combined with the end of the spring clamp. A fixing pin hole is formed on the upper side of the spring clamp. A spring groove(31a) is formed on the side which is combined with the pushing spring unit of the spring clamp.