Machining method for bottom nozzle of fuel assembly

• Main Authors: WANG YAOHUA, QIAO YUXIANG, LI JING, CHEN PENGFEI, WEN ZHIYUAN, REN ERLIANG, YANG JUNLI, WU PENG
• Format: Patent
• Language: Chinese; English
• Published: 24.07.2018
• 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 provides a machining method for a bottom nozzle of a fuel assembly. The method machines the bottom nozzle by adopting two fixtures through six procedures, wherein the fixture I is a square fixture, one working surface is distributed on each of the four side surfaces, a working surface is distributed on the top surface, and the fixture II is provided with a working surface. The novelmachining fixtures I and II are adopted to meet requirements on positioning, clamping and machining of the bottom nozzle, the machined bottom nozzle completely meets requirements of drawings and technical conditions, and the product quality is stable. 本发明提供种核燃料组件下管座机械加工方法。该方法采用两个夹具分六个工序进行下管座加工；其中，夹具为方形夹具，四个侧面各分布个工作面，顶面分布个工作面；夹具二带有个工作面。本发明采用新机械加工夹具和夹具二，满足下管座定位夹紧及加工要求，机械加工后的下管座完全满足图纸和技术条件要求，产品质量稳定。