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1.发明公开
公开(公告)号：EP4375260A1
公开(公告)日：2024-05-29
申请号：EP21950832.2
申请日：2021-12-15
申请人： China Nuclear Power Technology Research Institute Co., Ltd , China General Nuclear Power Corporation , CGN Power Co., Ltd.
发明人： XUE, Jiaxiang , WU, Lixiang , ZHANG, Xiansheng , REN, Qisen , LIAO, Yehong , ZHANG, Yongdong
CPC分类号： Y02E30/30 , G21C3/62 , G21C21/02 , C04B35/5607 , C04B35/58007 , C04B35/58092 , C04B35/622 , C04B2235/323220130101 , C04B2235/324120130101 , C04B2235/324420130101 , C04B2235/325120130101 , C04B2235/325620130101 , C04B2235/40420130101 , C04B2235/42220130101 , C04B2235/42820130101 , C04B2235/658120130101 , G21C3/64 , C04B35/632 , C04B2235/545420130101 , G21C3/045
摘要： Disclosed in the present invention are a high-entropy ceramic inert matrix dispersion fuel pellet and a preparation method therefor. The preparation method comprises: S 1, preparing raw material powder into a slurry and mixed powder, respectively; S2, spraying the slurry on the surfaces of rolling fuel particles, and drying to form a coating layer adhered to the surface of the fuel particles; S3, preparing a core biscuit and a core-shell biscuit; S4, loading the core biscuit into the core-shell biscuit, and performing heat treatment to obtain a ceramic green body; and S5, performing solution and sintering treatment to form a densified high-entropy ceramic inert matrix dispersion fuel pellet. The high-entropy ceramic inert matrix dispersion fuel pellet is prepared by means of an in-situ reaction-solid solution sintering two-step method, and the characteristics that the fuel pellet is high in heat conductivity, low in swelling, easy to post-process, suitable for industrial production and the like are achieved: the nuclear fuel containment under the condition that a nuclear reactor cladding is damaged is improved, the leakage of the nuclear fuel is prevented, and the nuclear power safety is improved; and the high-temperature resistance of the nuclear fuel is improved, and the application of the nuclear fuel in a high-temperature reactor is promoted.
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公开(公告)号：EP4421824A1
公开(公告)日：2024-08-28
申请号：EP21962231.3
申请日：2021-12-16
申请人： China Nuclear Power Technology Research Institute Co., Ltd , China General Nuclear Power Corporation , CGN Power Co., Ltd.
发明人： XUE, Jiaxiang , WU, Lixiang , ZHANG, Xiansheng , REN, Qisen , LIAO, Yehong , ZHANG, Yongdong
摘要： Disclosed in the present invention are a fuel module and an application thereof. The fuel module comprises a column structure, a plurality of hollow closed holes and a plurality of cooling through holes that are dispersedly provided in the column structure, and fuel provided in the column structure; the hollow closed holes are located in the column structure; each of the hollow closed holes is filled with fuel; the cooling through holes are isolated from the hollow closed holes, run through two opposite sides of the column structure, and are used for allowing a cooling medium to pass through. In the fuel module of the present invention, a column structure is used as a supporting body, and hollow closed holes are filled with fuel and cooperate with cooling through holes to form an integrated structure. Compared with the cladding-pellet-assembly structure of an existing fuel assembly, the overall structure has high strength, and the fuel module can withstand high pressure, is safe and reliable, and improves the safety of a nuclear reactor.
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3.发明公开
公开(公告)号：EP4230336A1
公开(公告)日：2023-08-23
申请号：EP21890809.3
申请日：2021-09-17
申请人： Ling Dong Nuclear Power Co., Ltd , China Nuclear Power Technology Research Institute Co., Ltd. , China General Nuclear Power Corporation , CGN Power Co., Ltd.
发明人： XUE, Jiaxiang , LIAO, Yehong , REN, Qisen , LIU, Tong , ZHAI, Jianhan , MA, Haibin , ZHANG, Xiansheng , ZHANG, Yongdong , LI, Rui , LIU, Yang
摘要： A brazing connection method for a silicon carbide cladding, comprising the following steps: S1, using Al and Si as connection materials, providing the connection materials between a cladding pipe and an end plug which are matched with each other, forming a middle connection material of an Al/Si/Al three-layer structure, and forming, by means of the middle connection material, the cladding pipe, and the end plug, an assembly to be connected; and S2, placing said assembly in a vacuum or inert atmosphere for brazing connection, the middle connection material forming a connection layer, and connecting the cladding pipe and the end plug into a whole. The present invention further relates to a silicon carbide cladding formed by the method, a fuel rod comprising same, and a fuel assembly. In the present brazing connection method, Al and Si are used as the connection materials, and the connection layer of the Al/Si/Al three-layer structure is formed between the cladding pipe and the end plug, such that high-strength and reliable connection of the SiC cladding is achieved, and the SiC cladding is good in high-temperature resistance and hydrothermal corrosion resistance, thereby meeting nuclear application requirements.
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公开(公告)号：EP4421053A1
公开(公告)日：2024-08-28
申请号：EP21962232.1
申请日：2021-12-16
申请人： China Nuclear Power Technology Research Institute Co., Ltd , China General Nuclear Power Corporation , CGN Power Co., Ltd.
发明人： WU, Lixiang , XUE, Jiaxiang , LIAO, Yehong , REN, Qisen , ZHAI, Jianhan , ZHANG, Yongdong , ZHANG, Xiansheng
IPC分类号： C04B37/00
摘要： A silicon carbide joint and a metal penetration connection method therefor. The metal penetration connection method comprises the following steps: S1.formulating a first metal raw material and a second metal raw material to form a connection material; S2.arranging the connection material between the connection faces of two silicon carbide parts, so that the connection material and the two silicon carbide parts form a sandwich structure; S3.placing the sandwich structure in a sintering environment having a metal phase and sintering same, wherein during the sintering process, the metal phase penetrates into the connection material and fills air holes generated in the connection material; and S4.after sintering, densifying the connection material to form a connection layer, so as to connect the two silicon carbide parts to form a silicon carbide joint. According to the metal penetration connection method for the silicon carbide joint, the metal phase penetrates into the connection material, so that the densification of the connection material is achieved, the silicon carbide joint with high strength connection and good air tightness is obtained, and the requirements for the shape, structure, etc., of silicon carbide are reduced.
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5.发明公开
公开(公告)号：EP4292996A1
公开(公告)日：2023-12-20
申请号：EP21934419.9
申请日：2021-09-09
申请人： Ling Dong Nuclear Power Co., Ltd , China Nuclear Power Technology Research Institute Co., Ltd , China General Nuclear Power Corporation , CGN Power Co., Ltd.
发明人： WU, Lixiang , XUE, Jiaxiang , LIAO, Yehong , REN, Qisen , ZHAI, Jianhan , ZHANG, Yongdong , ZHANG, Xiansheng
摘要： Disclosed in the present invention are a connection method for a silicon carbide (SiC) cladding for nuclear application, and a SiC cladding and an application thereof. The connection method comprises the following steps: S1, preparing a connection slurry; S2, uniformly applying the connection slury on connection surfaces of a SiC end plug and/or a SiC cladding tube, and relatively matching the connection surfaces of the SiCend plug and the SiC cladding tube to form a connection structure; S3, heating the connection structure to 100-300°C in a protective atmosphere, keeping the temperature for 0.1-4 h, and curing the connection slurry between the SiC end plug and the SiC cladding tube to form a connection layer; and S4, performing resistance welding treatment on the cured connection structure to densify the connection layer, and connecting the SiC end plug and the SiC cladding tube densely to form the SiC cladding. According to the connection method for a SiC cladding for nuclear application in the present invention, rapid connection between the end plug and the cladding tube is achieved by using the resistance welding techology, thereby greatly saving the working time, and improving the connection efficiency; and a heat-affected zone of resistance welding connection is small, such that a nuclear fuel inside the cladding cannot be affected, and the reliability of the cladding is improved.
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公开(公告)号：EP4293686A1
公开(公告)日：2023-12-20
申请号：EP22917828.0
申请日：2022-01-07
申请人： Ling Ao Nuclear Power Co., Ltd. , China Nuclear Power Technology Research Institute Co., Ltd , China General Nuclear Power Corporation , CGN Power Co., Ltd.
发明人： CHEN, Mingzhou , REN, Qisen , LIAO, Yehong , WANG, Jiwei , LI, Lei , GUO, Daxi , XIE, Yiran , WEN, Jian , LI, Rui , GE, Hongen , ZHANG, Xiansheng , CHEN, Mengteng , ZHANG, Yongdong
摘要： A high-uranium-density ATF nuclear fuel pellet and a preparation method therefor. The high-uranium-density ATF nuclear fuel pellet comprises a columnar inner region (10), an isolation layer (20) covering the outer surface of the inner region (10), and a peripheral region (30) covering the isolation layer (20), wherein the inner region (10) is prepared from a nuclear fuel that is resistant to the oxidation of water and water vapor, and a high-uranium-density nuclear fuel; the peripheral area (30) is prepared from a nuclear fuel that is resistant to the oxidation of water and water vapor; and the mass of the high-uranium-density nuclear fuel accounts for 3-50% of the total mass of the inner region (10) and the isolation layer (20). The high-uranium-density ATF nuclear fuel pellet has an increased uranium loading amount and an effectively reduced central temperature, thereby improving the economical efficiency and safety of the operation of a reactor; and the use of the high-uranium-density nuclear fuel in a water-cooled nuclear reactor is realized, and the accident-tolerant capability of the nuclear reactor is improved.
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7.发明公开
公开(公告)号：EP4230598A1
公开(公告)日：2023-08-23
申请号：EP21890810.1
申请日：2021-09-17
申请人： China Nuclear Power Technology Research Institute Co., Ltd. , Ling Dong Nuclear Power Co., Ltd , China General Nuclear Power Corporation , CGN Power Co., Ltd.
发明人： XUE, Jiaxiang , LIAO, Yehong , REN, Qisen , LIU, Tong , ZHAI, Jianhan , MA, Haibin , ZHANG, Xiansheng , ZHANG, Yongdong , LI, Rui , LIU, Yang
摘要： Disclosed are a solder for connection and a preparation method therefor and a method for connecting a silicon carbide cladding. The solder for connection comprises the following raw materials: a precursor, a glass powder and an organic solvent, wherein the mass ratio of the precursor to the glass powder is 90-98: 2-10. The solder for connection of the present invention is used for connecting a silicon carbide cladding. A glass additive phase formed by the glass powder has good wettability to silicon carbide and a high connection strength. The proportion of the glass powder is adjustable, so that the coefficient of thermal expansion of the glass additive phase is adjustable, and the stress of a joint after connection is controllable. A thick compact connection layer can be realized, facilitating engineering assembly and realizing better air tightness.
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