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1. 发明公开

EP4235693A3 FISSION PRODUCT GETTER 审中-实审
公开(公告)号：EP4235693A3
公开(公告)日：2023-10-11
申请号：EP23178410.9
申请日：2017-03-07
申请人： TerraPower LLC
发明人： VOLLMER, James M , EICHEL, Daniel
IPC分类号： G21C3/18 , G21C3/17 , G21C3/32
摘要： A getter element includes a getter material reactive with a fission product contained within a stream of liquid and/or gas exiting a fuel assembly of a nuclear reactor. At least one transmission pathway passes through the getter element that is sufficiently sized to maintain a flow of the input stream through the getter element at above a selected flow level. At least one transmission pathway includes a reaction surface area sufficient to uptake a pre-identified quantity of the fission product.

2. 发明公开

EP4141890A1 FUEL ELEMENT FOR A WATER-COOLED WATER-MODERATED NUCLEAR REACTOR 审中-实审
公开(公告)号：EP4141890A1
公开(公告)日：2023-03-01
申请号：EP21940028.0
申请日：2021-05-31
申请人： Joint-Stock Company "TVEL"
发明人： NOVIKOV, Vladimir Vladimirovich , KUZNETSOV, Vladimir Ivanovich , MIKHEEV, Evgeniy Nikolaevich , GIZATULLIN, Timur Tagirovich , SERGIENKO, Ivan Romanovich , LYSIKOV, AAleksandr Vladimirovich
IPC分类号： G21C3/07 , G21C3/18 , G21C3/28
摘要： The invention relates to nuclear engineering and involves improvement of the design of fuel elements as part of an advanced fuel assembly that make up the core in a water-cooled vessel-type nuclear reactor of increased capacity, particularly VVER-1000. In particular, the invention relates to TBCA-T.mod.2, a new modification of fuel assemblies, and can be used at Temelin NPP. The technical result is that of increasing efficiency factor of the pressurized water reactor while maintaining the reliability and safe operation of the fuel element. The essence of the invention is as follows: the fuel element comprises a cylindrical cladding having a length of 3946±1 mm and being made of E110 ultra-high purity or E110M zirconium alloy, with an outer diameter of 9.10±0.04 mm and a wall thickness of 0.585±0.05 mm, an upper and a lower plugs providing sealing and the initial inert gas pressure of 2.7±0.2 MPa, a fuel column located in the cladding and assembled from solid fuel pellets, each pellet having a height of 11±1 mm and an outer diameter of 7.8±0.03 mm, with the total weight of all fuel pellets of 1825±20 g, and a retaining spring disposed in the cladding, being made in the form of a cylindrical spring and comprised of compensating group coils, buffer coils, and fixing group coils. The fuel pellets of the active fuel column part are made of uranium dioxide with 0.1 to 5% wt. of Uranium-235, and the fuel pellets of the upper and lower blanket parts of the fuel column are made of uranium dioxide comprising less Uranium-235 than in the active part. The length of the fuel element is 3978±2 mm.

3. 发明公开

EP3935649A2 SELF-HEALING LIQUID PELLET-CLADDING GAP HEAT TRANSFER FILLER 审中-公开
公开(公告)号：EP3935649A2
公开(公告)日：2022-01-12
申请号：EP20750788.0
申请日：2020-03-05
申请人： Westinghouse Electric Company LLC
发明人： LAHODA, Edward J. , XU, Peng , CAI, Lu , LONG, Yun , LYONS, John
IPC分类号： G21C3/07 , G21C3/18 , G21C3/20

4. 发明公开

EP3817007A1 NUCLEAR FUEL ROD INCLUDING DISK-TYPE BURNABLE ABSORBER 有权转让
公开(公告)号：EP3817007A1
公开(公告)日：2021-05-05
申请号：EP20159606.1
申请日：2020-02-26
申请人： Korea Advanced Institute Of Science And Technology
发明人： KIM, Yonghee , JANG, Seongdong , NGUYEN, Xuan Ha
IPC分类号： G21C3/18 , G21C7/04
摘要： Disclosed is a nuclear fuel rod (10) including at least one or more fuel pellets (11) and a cladding tube (12) surrounding the fuel pellets (11), the nuclear fuel rod (10) including at least one or more burnable absorber (13) inside the cladding tube (12), and the burnable absorber (13) including a burnable absorber material (13a) and a cladding material (13b) surrounding the burnable absorber material (13a).

5. 发明公开

EP1650767A4 MOX FUEL ASSEMBLY FOR PRESSURIZED WATER REACTOR 审中-公开
标题翻译： MOX燃料大会作压水堆
公开(公告)号：EP1650767A4
公开(公告)日：2011-05-25
申请号：EP03738593
申请日：2003-06-30
申请人： NUCLEAR FUEL IND LTD
发明人： HANAYAMA YASUSHI , KAWAMURA MITSURU
IPC分类号： G21C3/30 , G21C3/18 , G21C3/326 , G21C3/62
CPC分类号： G21C3/326 , G21C3/62 , Y02E30/32 , Y02E30/38

6. 发明公开

EP2135257A1 A METHOD FOR OPERATING A REACTOR OF A NUCLEAR PLANT 审中-公开
标题翻译：一种用于运行核电厂的反应堆
公开(公告)号：EP2135257A1
公开(公告)日：2009-12-23
申请号：EP08741890.1
申请日：2008-04-07
申请人： Westinghouse Electric Sweden AB
发明人： HELMERSSON, Sture , LIMBÄCK, Magnus , WRIGHT, Jonathan
IPC分类号： G21C17/04 , G21C3/17 , G21C3/18 , G21C7/08 , G21C7/32
CPC分类号： G21D3/06 , G21Y2002/50 , G21Y2004/40 , Y02E30/40
摘要： A method of operating a nuclear reactor is disclosed. The reactor (1) encloses a core having a plurality of fuel rods (9). Each fuel rod (9) includes a cladding and fuel pellets of a nuclear fuel. The fuel pellets are arranged in an inner space of the cladding leaving a free volume comprising an upper plenum, a lower plenum and a pellet-cladding gap. The reactor is operated at a normal power and a normal inlet sub-cooling during a normal state. The reactor is monitored for detecting a defect on the cladding of any of the fuel rods. The operation of the reactor is changed to a particular state after detecting such a defect. The particular state permits an increase of the free volume in the defect fuel rod. The reactor is operated at the particular state during a limited time period, after which the reactor is operated at the normal state.

7. 发明公开

EP1979914A1 DISPOSITIF DE MONTAGE DE RESSORT POUR CRAYON DE COMBUSTIBLE NUCLEAIRE 有权
标题翻译： FEDEREINPASSVORRICHTUNG用于核燃料棒
公开(公告)号：EP1979914A1
公开(公告)日：2008-10-15
申请号：EP07704303.2
申请日：2007-02-01
申请人： Areva NC
发明人： VASSEUR, Patrick , ALLARD, Jean-Luc , FANTINI, Serge
IPC分类号： G21C21/02 , G21C3/18
CPC分类号： G21C3/18 , G21C3/28 , G21C21/02 , G21Y2002/205 , G21Y2002/302 , G21Y2004/30 , G21Y2004/401 , Y02E30/40
摘要： The subject of the present invention is mainly a device for fitting a spring into a nuclear fuel rod clad, comprising a spring dispenser (4) for dispensing a spring (14), a spring loader (2) for loading a spring into the clad, the dispenser (4) delivering the springs (14) to the loader (2), said loader (2) having a longitudinal slideway (32) for receiving the spring (14), a pusher, for placing the spring (14) in the clad and capable of moving in the slideway, and means for causing the displacement of said pusher, said device including mechanical means (48) for associating the actuation of the displacement means with that of the spring dispenser (4).

8. 发明公开

EP1395993A1 A FUEL ROD FOR A NUCLEAR PLANT AND A PLENUM SPRING ARRANGED TO BE PROVIDED IN SUCH A FUEL ROD 有权
标题翻译：燃料棒核电厂和规定的前提下这样的燃料棒DESIGNED全体会议SPRING
公开(公告)号：EP1395993A1
公开(公告)日：2004-03-10
申请号：EP02736415.7
申请日：2002-06-07
申请人： Westinghouse Atom AB
发明人： HELMERSSON, Sture
IPC分类号： G21C3/18
CPC分类号： G21C3/18 , Y02E30/40
摘要： The present invention relates to a fuel rod for a nuclear plant and a plenum spring arranged to be provided in a fuel rod. The fuel rod (1) comprises a cladding tube (2) sealed at its ends by end plugs (3, 4), a plurality of fuel pellets (5) stacked on each other inside the cladding tube (2) such that they form a column of pellets and said plenum spring (6) arranged to hold with a spring force the column of pellets against the lower second end of the cladding tube (2) during operation. The plenum spring (6) comprises a first length variable part (8) which abuts the uppermost located fuel pellet (5) in the column of pellets with an end portion (9), a second part (10) which allows engagement of the plenum spring (6) against an inner surface of the cladding tube (2) by a radially outwardly directed pressure and a third part (11) which allows releasing of the second part (10) of the plenum spring (6) in the cladding tube (2) during operation of the nuclear plant.

9. 发明公开

EP0595571A1 Elliptical metal fuel/cladding barrier and related method for improving heat transfer 失效
标题翻译：金属燃料和包壳管及方法之间椭圆屏障用于改善热传递。
公开(公告)号：EP0595571A1
公开(公告)日：1994-05-04
申请号：EP93308471.7
申请日：1993-10-25
申请人： GENERAL ELECTRIC COMPANY
发明人： Taylor, Ira Nelson, Jr. , Wadekamper, Donald Clifford
IPC分类号： G21C3/18
CPC分类号： G21C3/18 , Y02E30/40
摘要： A barrier tube (18) of non-circular cross section is arranged in the space (16) between the stainless steel cladding (14) and metal fuel slugs (12) of a liquid metal reactor. The non-circular shape of this barrier design promotes improved thermal bonding in both the cladding/barrier and barrier/fuel interface regions. The non-circular barrier results in three areas with liquid metal thermal bond gaps having an angle which approaches that for a metal fuel pin without a barrier. Thus, the degree of circumferential unbonding will be less than that which results in localized fuel melting during radiation.
摘要翻译：非圆形横截面的管屏障（18），在液体中的金属反应器的不锈钢包层（14）和金属燃料蛞蝓（12）之间的空间（16）布置。此屏障设计的非圆形形状促进在这两个包层/势垒和势垒/燃料界面区域改进的热粘合。非圆形屏障导致在三个方面与具有角度其接近做对于没有阻挡金属燃料销液态金属热粘结的间隙。因此，周向unbonding的程度将小于这里面照射时产生局部熔化的燃料。

10. 发明公开

EP0439002A1 Nuclear reactor core having nuclear fuel and composite burnable absorber arranged for power peaking and moderator temperature coefficient control 失效
标题翻译：与核燃料和复合可燃毒物以控制功率峰值和慢化剂温度系数核反应堆芯的布置。
公开(公告)号：EP0439002A1
公开(公告)日：1991-07-31
申请号：EP91100025.5
申请日：1991-01-02
申请人： WESTINGHOUSE ELECTRIC CORPORATION
发明人： Kapil, Sunshil Kumar
IPC分类号： G21C3/18 , G21C7/04
CPC分类号： G21C7/04 , G21C3/18 , G21Y2002/201 , G21Y2002/601 , G21Y2004/10 , G21Y2004/30 , Y02E30/39
摘要： A nuclear reactor core (14) has a first group of fuel rods (48) containing fissionable material and no burnable absorber, and a second group of fuel rods (48) containing fissionable material and two burnable absorber materials. The groups of fuel rods are arranged in the core for controlling power peaking and moderator temperature coefficient. The number of fuel rods in the first group are greater than the number in the second group.
The two burnable absorber materials can be provided as separate coatings (80), (82) or a mixture (78B). One burnable absorber material is an erbium-bearing material such as erbium oxide and the other is a boron-bearing material such as zirconium diboride. Alternatively, the erbium-bearing material can be interspersed or mixed with the fissionable material (74).
摘要翻译：核反应堆堆芯（14）具有燃料棒的第一组（48）包含可裂变材料和无可燃吸收体，以及包含可裂变材料和两个可燃吸收材料的第二组燃料棒（48）。燃料棒的组被布置在芯用于控制功率峰值和减速剂的温度系数。第一组中的燃料棒的数目比第二组中的数量。两个可燃吸收材料可以作为单独的涂层（80），（82）或它们的混合物（78B）来提供。一种可燃吸收材料是铒轴承材料：诸如氧化铒，而另一个是一个含硼轴承材料：如二硼化锆。可替代地，铒的轴承材料可以散布或与可裂变材料（74）混合。

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