公开(公告)号：US10902957B2

公开(公告)日：2021-01-26

申请号：US16029107

申请日：2018-07-06

申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

发明人： Victor Blanc ,  Thierry Beck

IPC分类号： G21C3/334 ,  G21C19/34 ,  G21C19/19 ,  G21C3/324 ,  G21C1/03 ,  G21C1/02 ,  G21C5/10

摘要： An assembly to be inserted into a nuclear reactor, such as a liquid sodium-cooled fast neutron reactor, includes an assembly hollow body of elongate shape along a longitudinal axis X. The wall of the hollow body includes at least one through-opening. The assembly also includes an assembly element inserted into the hollow body. The assembly element includes at least one flexible blade of which the free end is shaped into a clip-fastening hook collaborating in clip-fastening fashion with the through-opening from inside the hollow body, so as to connect the assembly element to the hollow body. The assembly also includes at least one removable structure for locking the flexible blade clip-fastened into the through-opening. The removable locking structure makes it possible to prevent the flexible blade from flexing and thus the removable locking structure makes it possible to lock a connection between the assembly element and the hollow body.

公开(公告)号：US20170352442A1

公开(公告)日：2017-12-07

申请号：US15536421

申请日：2015-12-18

申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

发明人： Denis Lorenzo ,  Thierry Beck ,  Guy Mailhe

IPC分类号： G21C19/105 ,  G21C13/06 ,  G21C3/335 ,  G21C19/20 ,  G21C3/334

CPC分类号： G21C19/105 ,  G21C3/30 ,  G21C3/334 ,  G21C3/335 ,  G21C13/06 ,  G21C19/207 ,  Y02E30/40

摘要： Fuel assembly for a nuclear reactor comprising a housing of longitudinal axis (X) having a central section containing nuclear-fuel pins and an upper section, forming a portion of the head of the assembly, containing a upper neutron shielding device (NSD) including neutron absorbers and means for reversibly interlocking with the housing and a moveable weight forming the head of the NSD, which is mounted so as to be able to move translationally relative to the rest of the NSD over a given path, said interlocking means being configured so that the NSD and the housing can be interlocked and uninterlocked by moving the moveable weight along the longitudinal axis by means of a grapple for extraction of the NSD, the claws of this grapple engaging with the moveable weight and the rest of the NSD being in downward longitudinal abutment in the interior of the housing.

公开(公告)号：US11087894B2

公开(公告)日：2021-08-10

申请号：US16030894

申请日：2018-07-10

申请人： Commissariat A L'Energie Atomique et aux Energies Alternatives

发明人： Thierry Beck ,  Jean-Claude Garnier ,  Denis Lorenzo

IPC分类号： G21C9/016 ,  G21C5/10 ,  G21C1/02 ,  G21C3/322 ,  G21C13/06 ,  G21C3/335 ,  G21C3/334 ,  G21C3/326 ,  G21C3/30 ,  G21C1/32 ,  G21C1/03

摘要： A mitigation assembly for a nuclear reactor including a box with an upper portion forming the head of the assembly housing an upper neutron shielding device, including a head including removable lock and a slug installed free to move in translation relative over a given travel distance, the lock being configured such that locking/unlocking between the head and the box can be made by displacement of the slug with an extraction grab with its pawls attached in the slug. The lower part of the upper neutron shielding device includes a cone-shaped sealing block with the tip of the cone oriented downwards, cooperating with a cone-shaped internal surface of the box, a sealing device being formed between the two, the assembly created forming a removable sealing plug.

公开(公告)号：US20190019585A1

公开(公告)日：2019-01-17

申请号：US16030894

申请日：2018-07-10

申请人： Commissariat A L'Energie Atomique et aux Energies Alternatives

发明人： Thierry Beck ,  Jean-Claude Garnier ,  Denis Lorenzo

IPC分类号： G21C1/02 ,  G21C3/322 ,  G21C3/334 ,  G21C3/335 ,  G21C13/06

摘要： The main purpose of the invention is a mitigation assembly (40) for a nuclear reactor comprising a box (41) with an upper portion (41) forming the head of the assembly housing an upper neutron shielding (UNS) device, comprising a head (105) comprising removable locking means (100) and a slug (101) installed free to move in translation relative over a given travel distance, the locking means (100) being configured such that locking/unlocking between the head (105) and the box (41) can be made by displacement of the slug (101) by means of an extraction grab with its pawls attached in the slug (101), characterised in that the lower part of the upper neutron shielding device comprises a cone-shaped sealing block (107) with the tip of the cone oriented downwards, cooperating with a cone-shaped internal surface (108) of the box (41), a sealing device (109) being formed between the two, the assembly created forming a removable sealing plug (110).