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1. WO2019052315 - FUEL CLADDING AND FUEL ASSEMBLY

Publication Number WO/2019/052315
Publication Date 21.03.2019
International Application No. PCT/CN2018/101374
International Filing Date 20.08.2018
IPC
G21C 3/07 2006.01
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
CNUCLEAR REACTORS
3Reactor fuel elements or their assemblies; Selection of substances for use as reactor fuel elements
02Fuel elements
04Constructional details
06Casings; Jackets
07characterised by their material, e.g. alloys
G21C 3/06 2006.01
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
CNUCLEAR REACTORS
3Reactor fuel elements or their assemblies; Selection of substances for use as reactor fuel elements
02Fuel elements
04Constructional details
06Casings; Jackets
CPC
G21C 3/07
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
CNUCLEAR REACTORS
3Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
02Fuel elements
04Constructional details
06Casings; Jackets
07characterised by their material, e.g. alloys
G21C 3/08
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
CNUCLEAR REACTORS
3Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
02Fuel elements
04Constructional details
06Casings; Jackets
08provided with external means to promote heat-transfer, e.g. fins, baffles
Y02E 30/30
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
30Energy generation of nuclear origin
30Nuclear fission reactors
Applicants
  • 中广核研究院有限公司 CHINA NUCLEAR POWER TECHNOLOGY RESEARCH INSTITUTE CO., LTD [CN]/[CN]
  • 中国广核集团有限公司 CHINA GENERAL NUCLEAR POWER CORPORATION [CN]/[CN]
  • 中国广核电力股份有限公司 CGN POWER CO., LTD [CN]/[CN]
Inventors
  • 薛佳祥 XUE, Jiaxiang
  • 张显生 ZHANG, Xiansheng
  • 刘彤 LIU, Tong
  • 李锐 LI, Rui
  • 李思功 LI, Sigong
  • 严俊 YAN, Jun
  • 严岩 YAN, Yan
  • 龚星 GONG, Xing
  • 黄华伟 HUANG, Huawei
  • 任啟森 REN, Qisen
  • 卢志威 LU, Zhiwei
Agents
  • 深圳市瑞方达知识产权事务所(普通合伙) SHENZHEN REFINED INTELLECTUAL PROPERTY OFFICE (GENERAL PARTNERSHIP)
Priority Data
201710824174.313.09.2017CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) FUEL CLADDING AND FUEL ASSEMBLY
(FR) GAINE DE COMBUSTIBLE ET ASSEMBLAGE COMBUSTIBLE
(ZH) 燃料包壳及燃料组件
Abstract
(EN)
Disclosed are a fuel cladding and a fuel assembly, wherein the fuel cladding comprises a zirconium alloy substrate, an intermediate layer arranged on the zirconium alloy substrate and having non-stoichiometry and gradient characteristics, and an ambient shielding layer arranged on the intermediate layer; and the intermediate layer and the ambient shielding layer form a gradient multiphase coating having non-stoichiometry on the zirconium alloy substrate. The fuel cladding overcomes the problems in a single coating of conventional zirconium alloy claddings, such as interfacial stresses, interfacial diffusion and zero tolerance to high temperature vapour oxidation, is applicable to accident fault-tolerant nuclear fuel cladding uses, and greatly improves the anti-accident ability of a nuclear reactor to maintain nuclear fuel assembly structure and functional integrality under severe accident conditions, and a safety threshold thereof.
(FR)
La présente invention porte sur une gaine de combustible et sur un assemblage combustible, la gaine de combustible comprenant un substrat en alliage de zirconium, une couche intermédiaire disposée sur le substrat en alliage de zirconium et ayant des caractéristiques de non-stœchiométrie et de gradient, et une couche de protection ambiante disposée sur la couche intermédiaire ; et la couche intermédiaire et la couche de protection ambiante forment un revêtement multiphase à gradient ayant une non-stœchiométrie sur le substrat en alliage de zirconium. La gaine de combustible surmonte les problèmes dans un revêtement unique de gaines en alliage de zirconium classiques, tels que des contraintes interfaciales, une diffusion interfaciale et une tolérance nulle à une oxydation de vapeur à haute température, est applicable à des utilisations de gaine de combustible nucléaire tolérant aux défaillances d'accidents, et améliore considérablement la capacité anti-accident d'un réacteur nucléaire pour conserver la structure d'assemblage de combustible nucléaire et l'intégralité fonctionnelle dans des conditions d'accident grave, et un seuil de sécurité de ce dernier.
(ZH)
一种燃料包壳及燃料组件,燃料包壳包括锆合金基体、设置在锆合金基体上的具有非化学计量比和梯度特征的中间层、以及设置在中间层上的环境屏蔽层;中间层和环境屏蔽层在锆合金基体上形成具有非化学计量比的梯度复相涂层。克服了传统锆合金包壳单一涂层存在的界面应力、界面扩散、不耐高温蒸汽氧化的问题,适用于事故容错核燃料包壳用途,极大地提高了核反应堆在严重事故工况下维持核燃料组件结构与功能完整性的抗事故能力和安全阈值。
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