• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an electrical penetration assembly (100) of a reactor vessel capable of being installed in a reactor vessel (10) port (20), said electrical penetration assembly (100) being characterized in that it comprises: a penetration body (105) comprising: a first end (110) capable of being positioned inside the vessel; a second end (120) adapted to be positioned outside the vessel; a sealed electrical connector (130) forming a first hermeticity of the electrical penetration assembly (100), said sealed electrical connector (130) isolating the penetration body (105) at the first end (110); a through-gate flange (140) having a plurality of unitary electrical feedthroughs (123), each unitary electrical feedthrough (123) permitting the passage of a single electrical conductor (160) providing continuity of the electrical connections, each unitary electrical feedthrough ( 123) being individually isolated by an individual insulator (142) forming a second hermeticity, said unitary electrical vias (123) isolating the penetration body (105) at the second end (120); an anti-ejection device formed by the cooperation of a throttle (141) provided at each unitary electrical feedthrough (123) and a shoulder (151) having dimensions greater than the dimensions of the throttling (141) of each unitary electrical passage (123) and provided on each of the electrical conductors (160) of said unitary feedthroughs (123).
    公开号:FR3038444A1
    申请号:FR1556144
    申请日:2015-06-30
    公开日:2017-01-06
    发明作者:Michel Brun
    申请人:Societe Technique pour lEnergie Atomique Technicatome SA；
    IPC主号:
    专利说明:

    ASSEMBLY OF ELECTRIC PENETRATION OF TANK OF A NUCLEAR REACTOR
    TECHNICAL FIELD OF THE INVENTION
    The invention relates to the field of electrical penetration assemblies (EPA) through the tanks of nuclear reactors.
    The invention finds a particularly interesting application in the field of integrated nuclear reactors and small modular reactors also called SMR (for Small & Modular Reactor in English) with many actuators / sensors in tank creating specific needs of electrical penetrations. Application in conventional pressurized reactors is possible as a replacement for glove fingers.
    STATE OF THE PRIOR ART
    These electrical tank penetrations must meet several criteria. They must be removable quickly, flexible to be compatible with the differential expansions between the tank and the internals, of a significant useful diameter (of the order of several centimeters) in order to be compatible with the number and the power of the electrical connections to ensure in the tank.
    A first known solution is to set up within the vessel a dedicated and removable instrumentation flange bringing together the many fingers of gloves required for a SMR to allow their removal in a single operation. Such a solution is described in particular in documents US 20130287157 and US 2014198891. The defect of this solution is the significant increase in the development of the extension of the second containment barrier for both the glove fingers and the sensors / actuators. Such an architecture therefore has the following consequences: to increase the risk of leakage, to multiply areas and parts subject to design, manufacturing, inspection and control regulations in service.
    [0005] In order not to add a second barrier extension, other proposed solutions consist in transposing existing architectures and technologies for containment bushings using hermetic connectors as proposed in document WO 2013 / 158697. In fact, hermetic electrical bushing technologies used for enclosure penetrations, such as pre-stressed glass ceramic or brazed ceramic technologies for example, withstand the temperature and pressure constraints of the primary fluid.
    However, the constraints and the design requirements required for the penetrations of the enclosure, located on the third containment barrier which are solicited in pressure and temperature only during an accident, are lower than the constraints and design requirements required for the penetrations of the reactor vessel which are permanently stressed by the primary fluid in terms of pressure and temperature, and whose failure is an initial cause of critical incident or even accident (according to the equivalent leakage diameter in case of failure).
    Therefore, it is not obvious to those skilled in the art to transpose all existing and known solutions of electrical enclosure penetrations electrical tank penetrations because they remain insufficient in terms of safety.
    In particular, the known electrical penetrations based on a prestressed glass ceramic technology or brazed ceramic to achieve hermeticity and electrical insulation, do not meet the characteristic required for the materials used in second barrier confinement. Indeed, the second barrier materials must have characteristics of particular ductility and tenacity. However, the non-ductile and fragile nature of glass, glass-ceramic or ceramic makes it difficult to use them directly on the perimeter of the second regulatory barrier under primary pressure, contrary to what is suggested in document WO 2013/158697.
    Indeed, in the field of integrated reactors and small modular reactors (SMR), it is a goal to reduce the design of the causes of major breaches. Therefore, a person skilled in the art seeking to achieve electrical penetrations of the tank according to these criteria would not be encouraged to directly use glass, ceramic or ceramic connectors, even though these technologies meet the pressure / temperature requirements of the primary liquid, because the abrupt failure of an electrical crossing of a significant diameter (typically between 30mm and 50mm in diameter for an electrical connection with about twenty points of contact) using a sealed glass, glass-ceramic or ceramic connector in constant contact with the conditions primary would be contrary to the spirit of the regulations applicable to the second containment barrier of a pressurized water reactor.
    SUMMARY OF THE INVENTION
    In this context, the invention seeks to propose an electrical penetration tank assembly of a nuclear reactor to overcome an extension of second containment barrier and to respect the spirit of the imposed design regulations. in the field of pressurized reactors and SMRs in particular, namely the prevention of primary leaks and the limitation of the consequences of possible failures.
    For this purpose, the subject of the invention is an assembly for electrical penetration of a reactor vessel capable of being installed in a reactor vessel orifice, said electrical penetration assembly comprising: a penetration body comprising: a first end able to be positioned inside the tank; a second end able to be positioned outside the tank; - A sealed electrical connector forming a first hermeticity of the electrical penetration assembly, said sealed electrical connector sealing the penetration body at the first end; a through-gate flange comprising a plurality of single electrical feedthroughs, each unitary electrical feedthrough allowing the passage of a single electrical conductor ensuring the continuity of the electrical connections, each unitary electrical feedthrough being isolated individually by an individual insulation forming a second hermeticity of the electrical penetration assembly, said unitary electrical vias sealing the penetration body at the second end; an anti-ejection device formed by the cooperation of a constriction provided at each unitary electrical crossing and a shoulder having dimensions greater than the dimensions of the constriction of each unitary electrical crossing and arranged on each of the conductors said single bushings.
    The electrical penetration assembly according to the invention may also have one or more of the following characteristics taken individually or in any technically possible combination: the electrical penetration assembly comprises means for sealingly sealing the electrical penetration assembly outside said reactor vessel; said individual insulators are prestressed ceramic or glass-ceramic insulators; said sealed electrical connector is an electrical connector having a ceramic insulator or prestressed glass-ceramic insulator; - The material of the insulation of the sealed electrical connector is different from the material forming the individual insulators; the electrical penetration assembly comprises means for detecting a leakage failure of the unit bushings; the electrical penetration body is under a pressure of a neutral gas and in that the means for detecting a leakage failure are formed by a detection device detecting an increase in pressure downstream of the unit crossings; advantageously, the penetration body is under a neutral gas pressure of the order of 1 to 10 MPa; - The penetration body comprises at least one rigid portion and a flexible portion adapted to deform at least in one direction; the electrical penetration assembly comprises means for limiting the leakage rate in the event of failure of the accumulated sealed electrical connector with the failure of at least one individual insulator; the electrical penetration assembly comprises a first means for limiting the leakage rate, in the event of failure of the sealed electrical connector accumulated to the failure of at least one individual insulator, formed by said anti-ejection device arranged at each level; unitary electrical crossings; the electrical penetration assembly comprises a second means for limiting the leakage flow, in the event of failure of the sealed electrical connector and of several unitary electrical feedthroughs, formed by a plurality of unitary ducts formed inside the penetration body, each unit duct being adapted to allow the passage of a single electrical conductor passing through said penetration body.
    The invention also relates to a nuclear reactor vessel characterized in that it comprises at least one electrical bushing according to the invention.
    The invention also relates to a nuclear reactor characterized in that it compotes a tank according to the invention.
    [0015] Advantageously, said nuclear reactor is an integrated reactor or a small modular reactor.
    Advantageously, said nuclear reactor comprises means for detecting a leakage of the sealed electrical connector by controlling the insulation of the electrical conductors relative to the ground.
    BRIEF DESCRIPTION OF THE FIGURES
    Other features and advantages of the invention will become apparent on reading the description which follows, with reference to the accompanying figures.
    [0018] Figure 1 illustrates a sectional view of a nuclear reactor vessel portion comprising a first embodiment of an electrical penetration tank assembly according to the invention.
    FIG. 2 illustrates in greater detail a unitary passage 142 of the electrical vessel penetration assembly illustrated in FIG. 1.
    FIG. 3 illustrates a sectional view of a portion of a nuclear reactor vessel comprising a second embodiment of an electrical tank penetration assembly according to the invention.
    In all the figures, the common elements bear the same references unless otherwise specified.
    The upstream and downstream terms used in the patent application are defined by considering the direction of flow of the primary fluid in case of leakage, that is to say from the inside to the outside of the tank 10 .
    DETAILED DESCRIPTION OF AN EMBODIMENT
    FIG. 1 illustrates a sectional view of a first embodiment of an electrical feedthrough 100 according to the invention installed in an orifice 20 of a tank 10 of a nuclear reactor, of integrated type or else SMR .
    The tank electrical penetration assembly (V-EPA for Vessel Electrical Penetration Assembly) 100 according to the invention comprises a penetration body 105 substantially cylindrical in shape having a first end 110, said internal end, intended to be positioned inside the tank 10 of the nuclear reactor and a second end 120, said outer end, intended to be positioned outside the tank 10 of the reactor.
    A sealed connector 130 is secured, for example by means of a sealed seal, at the inner end 110 of the penetration body 105 subjected to the conditions of pressure and temperature of the primary liquid. This waterproof connector 130 thus forms a first hermeticity of the penetration 100.
    The diameter of the connector 130 and the number of pins constituting it is fixed by the functional need (i.e., depending on the number of wires and insulation required). The sealed connector 130 used in an integrated nuclear reactor typically has a diameter of between 30mm and 50mm. The waterproof connector 130 is a connector qualified to meet the primary conditions, including without the presence of the terminator, ie the sensor or actuator normally connected, but is not subject to the regulations applicable to the devices of the second barrier .
    The outer end 120 of the electrical penetration 100 comprises a cross-pass flange 140 having a plurality of unit feedthroughs 123 in which a plurality of electrical conductors 160, such as pins, are individually insulated by an insulator 142 glass-ceramic or ceramic. The cross-member flange 140 thus constitutes a second hermeticity of the electrical penetration assembly 100.
    The outer end 120 of the electrical penetration 100 further comprises a leak detection and connection sensor 180 integrally connected (for example by welding) to the outer end of the cross-bridging flange 140. leak detection and connection 180 also allows the mounting of a standard connector 190 providing the electrical connection to the outside of the tank 10. Similarly to the sealed connector 130, the standard sealed connector 190 is secured, for example by means of a sealed weld, at the outer end of the detection and connection cell 180.
    The penetration body 105 also encloses a plurality of electrical cables 150 providing the electrical connection between the pins of the sealed connector 130 on the one hand (forming the first hermeticity of the penetration assembly 100) and the isolated electrical connectors 160 unitarily by an insulator 142 located at the cross-member flange 140 (forming the second hermeticity of the penetration assembly). The electrical cables 150 inside the penetration body are thus made unmountable. The electrical cables 150 are, for example, qualified mineral cables at the primary temperature conditions.
    Inside the penetration body 105 is formed a plurality of unitary conduits 106 (three ducts being shown in Figure 1), each of the single ducts 106 allowing the passage of a single electrical cable 150. Such conduits The units 106 formed inside the penetration body 105 advantageously make it possible to limit the leakage rate of the primary liquid in the event of complete failure of all the hermetic lines (ie connector 130 and unit bushings 123).
    The electrical penetration assembly 100 comprises means for ensuring the mechanical retention thereof on the tank 10. Advantageously, the means ensuring the mechanical maintenance are formed by an end flange 121 arranged at the second level. 120 end of the penetration body 105, thereby forming a holding flange and to secure the electrical penetration assembly 100 from the outside of the tank 10. For this purpose, the end flange 121 cooperates with fasteners 170 and at least one annular seal 171 for securing the electrical penetration assembly 100 sealingly to the tank 10. In the embodiment illustrated in Figure 1, the end plate 121 for holding and the door flange traverse 140 form a single piece. However, it is envisaged that these two elements can be achieved separately.
    Thus, the electrical penetration assembly 100 proposed by the invention seeks to decouple the connector function of the "second barrier barrier function", by shifting the design requirements related to the elements constituting the second barrier of confinement on the cross-member flange 140 and very particularly on the particular design of the bushings 123.
    Such an architecture thus makes it possible to have a sealed connector 130 subjected to the conditions of the primary liquid (ie to the temperature and pressure conditions of the primary liquid) without, however, complying with the design and manufacturing regulations for the elements constituting the second containment barrier, which advantageously makes use of a waterproof connector of simple design, easy to connect and / or disconnect, and avoid periodic inspection of this waterproof connector 130, as well as the entire connection up to 'to the sensor / actuator difficult to access because located inside the tank 10.
    Indeed, the continuity of the second confinement barrier, illustrated in Figure 1 by the dotted line referenced BS, is provided by the gateway flange 140 which respects the principles that will be explained later to compensate the non-ductility of the materials used for the hermetic insulating crossing.
    As illustrated in Figure 2, each unitary passage 123 of the cross-member flange 140 has at its outer end a throat 141 which also limits the leakage rate of the electrical penetration 100 in case of failure at the a unit crossing 123, combined with a failure of the connector 130 so as to meet the safety criteria.
    The electrical penetration assembly 100 according to the invention comprises an anti-ejection system to prevent ejection pins 160 or 150 cables located inside the penetration body 105. This system of anti-ejection is formed by the presence of a shoulder 151 at each electrical conductor 160 of the bushings 123 of the cross-pass flange 140. Each shoulder 151 cooperates with a throat 141 ensuring the non-ejection of the pin 160 or cable 150 even in total ruin of an insulator 142 coupled to the leak of the sealed connector 130. For this, the dimensions of the shoulders 151 at the penetrations 123 are greater than the dimensions, and in particular the diameter, of the constriction 141 at the output of the crossings 123.
    Advantageously, the materials used for sealing the sealed connector 130 of the first hermeticity and the unitary insulators 142 forming the second hermeticity are different. For example, it is possible to use an insulating connector 130 with a ceramic technology and unit insulators 142 using prestressed glass ceramic technology. The diversity of materials makes it possible to improve the justification of the concept with respect to common mode failures.
    The electrical penetration assembly 100 also comprises a detection means adapted to detect a leakage of the internal waterproof connector 130 and / or its mechanical connection to the penetration body 105. The detection means control the isolation permanent electrical connections to the ground. The failure of the internal waterproof connector 130 results in a flooding of primary liquid penetration body which will cause the loss of isolation of the electrical connections.
    The electrical penetration assembly 100 also comprises a detection means for detecting a leakage failure of at least one unitary passage 123 of the cross-bridged flange 140. The detection means is formed by the cooperation of the initial pressurization of the penetration body 105 and a pressure detector 181 ending in an internal chamber 182 of the connection detection cell 180.
    Thus, the pressure detector 181 detects all pressurized within said internal chamber 182 translating a loss of hermeticity of a unitary passage 123. The penetration body 105 is advantageously pressurized during the design with a neutral gas (eg nitrogen), typically under a pressure of 1 MPa to 10 MPa.
    Thus, thanks to the architecture of the electrical penetration assembly 100 according to the invention, and contrary to the state of the art, the failure of the internal sealed connector 130, does not lead to a breach of the primary liquid . This is made possible by the presence of a double hermeticity, by the presence of leakage detection means of the electrical penetration assembly 100 and by the presence of individually isolated electrical vias 123 having an architecture ensuring the non ejection of the driver in the event of failure of the unitary insulation 142. In addition, the individual character of the bushings 123 also makes it possible to limit the consequences of their possible failure by limiting the primary leakage diameter at the output of the electrical penetration 100 (typically less than 10mm in diameter) to meet safety requirements and to ensure continuity of the second containment barrier.
    The various components of the electrical penetration assembly 100 described above are assembled in an indissociable manner (for example by welding) to constitute a monobloc electrical penetration.
    FIG. 3 illustrates a second embodiment of an electrical crossing 200 of a nuclear reactor vessel according to the invention.
    This embodiment is identical to the first embodiment described above with the exception of what will be described below.
    In this second embodiment, the penetration body 205 has a rigid portion 206 at the orifice 20 of the vessel and a flexible portion 207 or more accurately flexible (for example in the longitudinal direction of the passage 200 ) allowing a docking with a terminator and the compensation of the differential expansions. Similarly to the first embodiment presented above, the flexible portion 207 is not deemed to be located on the second regulatory containment barrier.
    The invention has been particularly described by securing the electrical penetration assembly from the outside of the tank 10. However, it is also envisaged to secure the electrical penetration assembly according to the invention by the interior of the tank 10.
    权利要求:
    Claims (15)
    [1" id="c-fr-0001]
    1. Electrical penetration assembly (100) of a nuclear reactor vessel suitable for installation in a reactor vessel (10) port (20), said electrical penetration assembly (100) being characterized in that comprises: - a penetration body (105) comprising: a first end (110) capable of being positioned inside the vessel; a second end (120) able to be positioned outside the tank; - a sealed electrical connector (130) forming a first hermeticity of the electrical penetration assembly (100), said sealed electrical connector (130) sealing the penetration body (105) at the first end (110); a through-gate flange (140) comprising a plurality of unitary electrical feedthroughs (123), each unitary electrical feedthrough (123) permitting the passage of a single electrical conductor (160) ensuring the continuity of the electrical connections, each unitary electrical feedthrough (123) being individually insulated by an individual insulator (142) forming a second hermeticity of the electrical penetration assembly, said unitary electrical vias (123) sealing the penetration body (105) at the second end (120) ; an anti-ejection device formed by the cooperation of a throttle (141) formed at each unitary electrical feedthrough (123) and a shoulder (151) having dimensions greater than the dimensions of the throttling (141); ) of each unitary electrical feedthrough (123) and provided on each of the electrical conductors (160) of said unit feedthroughs (123).
    [2" id="c-fr-0002]
    2. Electrical penetration assembly (100) of a nuclear reactor vessel according to the preceding claim characterized in that it comprises means (170, 171) for sealingly sealing the electrical penetration assembly (100) to the outside said reactor vessel.
    [3" id="c-fr-0003]
    3. Nuclear reactor electrical penetration assembly (100) according to one of the preceding claims characterized in that said individual insulators (142) are prestressed ceramic or glass-ceramic insulators.
    [4" id="c-fr-0004]
    4. Electrical penetration assembly (100) tank of a nuclear reactor according to the preceding claim characterized in that said sealed electrical connector (130) is an electrical connector having a ceramic insulator or a prestressed glass ceramic insulator.
    [5" id="c-fr-0005]
    5. Nuclear reactor electrical penetration assembly (100) of a nuclear reactor according to the preceding claim characterized in that the material of the insulator of the sealed electrical connector (130) is different from the material forming the individual insulators (142).
    [6" id="c-fr-0006]
    6. Electrical penetration assembly (100) tank of a nuclear reactor according to one of the preceding claims characterized in that it comprises means for detecting a sealing failure of the bushings (123).
    [7" id="c-fr-0007]
    7. Electrical penetration assembly (100) tank of a nuclear reactor according to the preceding claim characterized in that the electrical penetration body (105) is under a pressure of a neutral gas and in that the means for detecting a failure sealing means are formed by a detection device (181) detecting a pressure increase downstream of the unit feedthroughs (123).
    [8" id="c-fr-0008]
    8. Electrical penetration assembly (100) of a nuclear reactor vessel according to one of the preceding claims characterized in that the penetration body (105) comprises at least one rigid portion and a flexible portion capable of deforming at least according to one direction.
    [9" id="c-fr-0009]
    Electrical reactor penetration assembly (100) of a nuclear reactor according to one of the preceding claims, characterized in that the electrical penetration assembly (100) comprises means (106, 141) for limiting the leakage flow rate. in case of failure of the sealed electrical connector (130) accumulated with the failure of at least one individual insulation (142).
    [10" id="c-fr-0010]
    Electrical reactor penetration assembly (100) of a nuclear reactor according to claim 9, characterized in that the electrical penetration assembly (100) comprises a first means for limiting the leakage flow, in the event of a connector failure. sealed electrical device (130) accumulated at the failure of at least one individual insulator (142), formed by said anti-ejection device (141, 151) provided at each of the individual electrical feedthroughs (123).
    [11" id="c-fr-0011]
    11. assembly electrical penetration (100) tank of a nuclear reactor according to one of claims 9 to 10 characterized in that the electrical penetration assembly (100) comprises a second means for limiting the leakage rate, in a failure of the sealed electrical connector (130) and multiple unitary electrical feedthroughs (123) formed by a plurality of unitary conduits (106) formed within the penetration body (105), each unitary conduit (106) being adapted to allow the passage of a single electrical conductor (150) passing through said penetration body (105).
    [12" id="c-fr-0012]
    12. Nuclear reactor vessel characterized in that it comprises at least one electrical bushing according to one of the preceding claims.
    [13" id="c-fr-0013]
    13. Nuclear reactor characterized in that it comprises a tank according to the preceding claim.
    [14" id="c-fr-0014]
    14. Nuclear reactor according to the preceding claim characterized in that it comprises means for detecting a sealing failure of the sealed electrical connector (130) by controlling the insulation of the electrical conductors (150, 160) with respect to the mass. .
    [15" id="c-fr-0015]
    15. Nuclear reactor according to the preceding claim characterized in that said nuclear reactor is an integrated reactor or a small modular reactor.
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    同族专利:
    公开号 | 公开日
    WO2017001409A1|2017-01-05|
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    法律状态:
    2016-05-24| PLFP| Fee payment|Year of fee payment: 2 |
    2017-01-06| PLSC| Publication of the preliminary search report|Effective date: 20170106 |
    2017-05-23| PLFP| Fee payment|Year of fee payment: 3 |
    2018-05-25| PLFP| Fee payment|Year of fee payment: 4 |
    2020-05-20| PLFP| Fee payment|Year of fee payment: 6 |
    2021-05-19| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1556144A|FR3038444B1|2015-06-30|2015-06-30|ASSEMBLY OF ELECTRIC PENETRATION OF TANK OF A NUCLEAR REACTOR|FR1556144A| FR3038444B1|2015-06-30|2015-06-30|ASSEMBLY OF ELECTRIC PENETRATION OF TANK OF A NUCLEAR REACTOR|
    EP16733483.8A| EP3317883B1|2015-06-30|2016-06-28|Electrical feedthrough assembly for a nuclear reactor vessel|
    CN201680039198.1A| CN107851467B|2015-06-30|2016-06-28|Electrical penetration assembly for nuclear reactor vessel|
    HUE16733483A| HUE043572T2|2015-06-30|2016-06-28|Electrical feedthrough assembly for a nuclear reactor vessel|
    ES16733483T| ES2720037T3|2015-06-30|2016-06-28|Cuba electric penetration assembly of a nuclear reactor|
    PCT/EP2016/065021| WO2017001409A1|2015-06-30|2016-06-28|Electrical penetration assembly for a nuclear reactor vessel|
    PL16733483T| PL3317883T3|2015-06-30|2016-06-28|Electrical feedthrough assembly for a nuclear reactor vessel|
    US15/738,411| US10910118B2|2015-06-30|2016-06-28|Electrical penetration assembly for a nuclear reactor vessel|
    CA2991081A| CA2991081A1|2015-06-30|2016-06-28|Electrical penetration assembly for a nuclear reactor vessel|
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