WO2013159438A1 - Pièces internes de réacteur dans un réacteur inférieur - Google Patents

Pièces internes de réacteur dans un réacteur inférieur Download PDF

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Publication number
WO2013159438A1
WO2013159438A1 PCT/CN2012/077178 CN2012077178W WO2013159438A1 WO 2013159438 A1 WO2013159438 A1 WO 2013159438A1 CN 2012077178 W CN2012077178 W CN 2012077178W WO 2013159438 A1 WO2013159438 A1 WO 2013159438A1
Authority
WO
WIPO (PCT)
Prior art keywords
reactor
distribution
distribution ring
plate
component according
Prior art date
Application number
PCT/CN2012/077178
Other languages
English (en)
Chinese (zh)
Inventor
林绍萱
梁叶佳
张明
刘彬
丁宗华
翁羽
余凡
陈宇清
Original Assignee
上海核工程研究设计院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 上海核工程研究设计院 filed Critical 上海核工程研究设计院
Publication of WO2013159438A1 publication Critical patent/WO2013159438A1/fr

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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C5/00—Moderator or core structure; Selection of materials for use as moderator
    • G21C5/02—Details
    • G21C5/10—Means for supporting the complete structure
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C13/00—Pressure vessels; Containment vessels; Containment in general
    • G21C13/02—Details
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
    • G21C15/02—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Definitions

  • the invention relates to a reactor internal component of a lower part of a reactor, in particular to a reactor internal component of a reactor which is simple in structure, uniform in flow distribution, small in drag coefficient and convenient for replacement and maintenance.
  • the pressurized water reactor includes a loop comprising a primary circuit and a secondary circuit, wherein the primary circuit completes the derivation of the reactor heat and conducts it through the steam generator to the secondary circuit to drive the steam turbine to generate electricity.
  • the primary circuit mainly consists of a reactor pressure vessel, a reactor internal component, a fuel assembly, a steam generator, a main pump, and a pipeline.
  • the fuel assembly is placed in a pressure vessel, and the support function is achieved by the internal components of the reactor, and the nuclear fuel maintains a controlled chain fission reaction in the reactor to generate energy.
  • the energy generated by nuclear fission is absorbed by the coolant to achieve cooling of the fuel assembly. After the energy is absorbed, the temperature of the coolant rises.
  • the steam generator is introduced into the steam generator through the main pipe, and the heat is exchanged with the second circuit, and the coolant after the temperature is lowered again into the core.
  • the reactor In order to allow the fuel assembly to be sufficiently cooled, the coolant needs to be uniform before it enters the core, so the reactor is equipped with a flow distribution device.
  • Conventional flow distribution devices are mostly perforated structures, which are formed by stacking one or more orifice plates through a certain support. However, as the volume of the lower chamber is reduced, the flow distribution effect of this structure becomes less desirable, so it is necessary to find a new structure instead.
  • the new type of flow distribution device in foreign countries adopts a combination of ring and tube plate, which is formed by a flow distribution ring that processes a large number of flow holes and an eddy current suppression plate.
  • the flow distribution of this structure is relatively ideal, but since the flow distribution ring is directly welded to the pressure vessel, the replacement is not required throughout the life, and the risk is high. In addition, the resistance coefficient of the structure itself is high.
  • the technical problem to be solved by the present invention is to provide a reactor lower pile internal component which is simple in structure, uniform in flow distribution, small in resistance coefficient, and easy to replace and repair.
  • the present invention includes a reactor internal pressure component, a reactor pressure vessel, a core disposed inside the reactor pressure vessel, and a core supporting lower plate fixed to the bottom of the core;
  • the flow distribution device of the circular hole, the flow distribution device comprises an upper distribution ring, a middle distribution ring fixedly connected to the bottom of the upper distribution ring in the circumferential direction, and a lower distribution plate fixedly connected with the bottom of the middle distribution ring in the circumferential direction;
  • a circular hole having a continuous diameter is continuously disposed on the circumferential side wall of the upper distribution ring.
  • the circumferential side wall of the middle distribution ring is provided with continuously distributed circular holes, and the number of the circular holes in each row is equal and the diameter is the same.
  • the lower distribution plate is rotationally symmetric with a circular hole.
  • the axial height of the upper distribution ring is less than the axial height of the middle distribution ring.
  • the circumferential side wall of the upper distribution ring forms an angle with the horizontal plane that is greater than the angle formed by the circumferential side wall of the middle distribution ring and the horizontal plane.
  • the lower surface of the lower distribution plate is provided with a plurality of energy absorbing devices, and the lower end of the energy absorbing device is provided with an anti-break bottom plate.
  • the bottoms of the upper eversions of the upper distribution ring are located on the same horizontal plane.
  • the flow distribution device is provided with a plurality of support columns whose upper ends are connected to the core support lower plate and the lower end is connected to the lower distribution plate.
  • the uniformity of the core inlet flow distribution is related to whether the core heat can be exported smoothly and directly, which directly determines the location of the core hot spot and the size of the heat pipe factor, and the heat pipe factor is directly related to the entire core.
  • the invention adopts a coated flow distribution device, after the coolant enters from the inlet of the pressure vessel, passes through the annular cavity, enters the flow distribution device of the lower chamber of the reactor, and realizes the steering along the arc surface of the lower head of the pressure vessel.
  • the coolant from the surrounding and bottom surfaces enters the core after a certain degree of mixing in the flow distribution device.
  • the entire flow distribution is caused by the connection of the convex portion and the support column.
  • the device is very rigid and resistant to the lateral impact of the coolant.
  • the invention realizes a good distribution effect of the coolant before entering the core through the round hole with appropriate size, quantity, shape and position on the flow distribution device, reduces the resistance loss along the path, and satisfies the deviation of the inlet flow distribution of the adjacent components. Allowable values, maximum average flow, and other indicators.
  • FIG. 1 is a schematic view showing the structure of a reactor internal pile member provided by the present invention.
  • Figure 2 is a schematic illustration of a flow distribution device in a reactor internal stack assembly provided by the present invention.
  • 1 is the reactor pressure vessel
  • 2 is the core support lower plate
  • 3 is the flow distribution device
  • 4 is the support column
  • 5 is the energy absorption device
  • 6 is the anti-break floor.
  • the invention includes a reactor pressure vessel 1, a core and a flow distribution device 3.
  • the core is placed inside the reactor pressure vessel 1.
  • the core support lower plate 2 is typically a large diameter circular plate on which a fuel assembly locating pin is placed for use as a support fuel assembly.
  • the core support lower plate 2 is machined with a large number of through holes, usually one set of four fuel assemblies. The coolant enters the core through these through holes and cools the core.
  • the flow distribution device 3 includes an upper distribution ring, a middle distribution ring, and a lower distribution plate.
  • the circumferential direction of the upper distribution ring The side wall is provided with a circular hole having a continuous distribution of equal diameters, and the top circumference diameter of the upper distribution ring is larger than the diameter of the lower circumference.
  • the circumferential side wall of the middle distribution ring is provided with continuously distributed circular holes, the number of the circular holes in each row is equal, the diameter is the same, and the diameter of the top circumference of the middle distribution ring is larger than the diameter of the bottom circumference.
  • the lower distribution plate is rotationally symmetric with a circular hole, and the diameter of the lower distribution plate is equal to the diameter of the bottom circumference of the middle distribution ring.
  • the axial height of the upper distribution ring is less than the axial height of the middle distribution ring.
  • the circumferential side wall of the upper distribution ring forms an angle with the horizontal plane that is greater than the angle formed by the circumferential side wall of the middle distribution ring and the horizontal plane.
  • the upper distribution ring, the middle distribution ring and the lower distribution plate are welded together to form a whole, and the processing water hole is avoided near the joint weld to prevent the strength of the weld from being weakened.
  • an integral forging process can be employed, in which case the number of rows of the water holes can be appropriately increased near the joint.
  • the top of the upper distribution ring is provided with a plurality of everted convex portions, and the convex portion of the upper distribution ring is fixedly connected with the core supporting lower plate by bolts or welding.
  • the bottoms of the plurality of everted protrusions of the upper distribution ring are located at the same level for storage of the lower stack internal components.
  • the flow distribution device 3 is provided with a plurality of support columns 4 whose upper ends are connected to the core supporting lower plate by screws, and the lower end and the lower distribution plate are connected by screws.
  • the lower surface of the lower distribution plate is uniformly fixed with four energy absorbing devices 5 by screws, and the lower end of the energy absorbing device 5 is fixed with a break preventing bottom plate 6 by screws.
  • the energy absorbing device 4 is composed of a sleeve, a damper and a guide post.
  • the anti-break floor 5 has a certain gap with the inner wall of the reactor pressure vessel. When a core drop accident occurs, the anti-break floor 5 is in contact with the reactor pressure vessel, and the energy absorbing device 4 is plastically deformed, absorbing some of the energy falling from the core to less impact on the reactor pressure vessel.
  • the coolant enters the reactor through two to four circular inlets on the reactor pressure vessel 1, passes down the annular passage into the lower chamber of the reactor, enters the reactor lower chamber flow distribution device, and is sealed along the reactor pressure vessel 1.
  • the head circular arc surface realizes steering, and enters the flow distribution device 3 through the circular hole of the flow distribution device 3, and the coolant from the surrounding and bottom surfaces enters the core after a certain degree of mixing in the flow distribution device 3, due to the convex portion
  • the connection to the support column 4 provides the entire flow distribution device with a good rigidity sufficient to withstand the lateral impact of the coolant.
  • a circular hole of appropriate size, number, shape and position is set on the flow distribution device 3, so that the coolant enters the core very well.
  • the good distribution effect reduces the resistance loss along the path, and satisfies the inlet flow distribution bias of the adjacent components; the allowable value, the maximum average flow rate and other indicators.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Structure Of Emergency Protection For Nuclear Reactors (AREA)

Abstract

L'invention concerne des pièces internes de réacteur dans un réacteur inférieur comprenant une cuve de réacteur sous pression (1), un cœur de réacteur situé dans la cuve de réacteur sous pression (1), une plaque inférieure de support (2) du cœur de réacteur fixée au fond du cœur de réacteur et un dispositif de distribution d'écoulement (3) doté de plusieurs ouvertures. Le dispositif de distribution d'écoulement (3) comprend une plaque de distribution supérieure, un anneau de distribution intermédiaire raccordé de façon fixe au bas de la plaque de distribution supérieure le long de la direction périphérique, une plaque de distribution inférieure raccordée de façon fixe au bas de l'anneau de distribution intermédiaire le long de la direction périphérique. Plusieurs sections évaginables en saillie sont présentes sur le dessus de l'anneau de distribution supérieur. Les sections évaginables en saillie de l'anneau de distribution supérieur sont raccordées de façon fixe à la plaque inférieure de support (2) du cœur de réacteur. Les pièces internes de réacteur dans un réacteur inférieur ont une structure simple, une distribution d'écoulement régulière et un faible coefficient de résistance, et elles sont faciles à remplacer et à réparer.
PCT/CN2012/077178 2012-04-27 2012-06-19 Pièces internes de réacteur dans un réacteur inférieur WO2013159438A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201210126989.1 2012-04-27
CN201210126989.1A CN103377735B (zh) 2012-04-27 2012-04-27 一种反应堆下部堆内构件

Publications (1)

Publication Number Publication Date
WO2013159438A1 true WO2013159438A1 (fr) 2013-10-31

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Family Applications (1)

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PCT/CN2012/077178 WO2013159438A1 (fr) 2012-04-27 2012-06-19 Pièces internes de réacteur dans un réacteur inférieur

Country Status (2)

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CN (1) CN103377735B (fr)
WO (1) WO2013159438A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3075448A1 (fr) * 2017-12-19 2019-06-21 Electricite De France Ensemble de tranquillisation de flux de reacteur nucleaire
CN112185599A (zh) * 2020-09-30 2021-01-05 中国核动力研究设计院 一种带有帽形引流的核反应堆堆内流量分配装置及导流板
WO2023118920A1 (fr) * 2021-12-22 2023-06-29 Framatome Ensemble de stabilisation de flux pour réacteur nucléaire, réacteur et procédé associés

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CN103177782B (zh) * 2013-01-08 2015-08-26 上海核工程研究设计院 一种反应堆下部堆内构件
CA2926738C (fr) * 2013-12-31 2022-10-04 Nuscale Power, Llc Systeme d'attenuation sismique pour un reacteur nucleaire
CN103971763A (zh) * 2014-05-06 2014-08-06 中广核工程有限公司 核电站反应堆的堆内流量分配装置
CN105719705A (zh) * 2014-12-01 2016-06-29 上海核工程研究设计院 一种压水反应堆整体水力模拟试验中的出口接管
CN104637553A (zh) * 2015-01-28 2015-05-20 中科华核电技术研究院有限公司 流量分配装置及具有该装置的核反应堆组件
CN105913889A (zh) * 2016-07-05 2016-08-31 上海核工程研究设计院 一种三环路核能系统
CN106847348B (zh) * 2017-01-19 2018-11-13 清华大学天津高端装备研究院 一种ads安全壳系统
CN107170490B (zh) * 2017-07-14 2023-07-04 中国核动力研究设计院 一种反应堆下腔室冷却剂搅混及均流装置
CN107221368B (zh) * 2017-07-26 2023-07-04 中国核动力研究设计院 反应堆冷却剂抑涡及流量分配装置及反应堆堆内构件
CN109036604B (zh) * 2018-07-20 2024-01-16 中广核研究院有限公司 一种堆芯过滤装置
CN110931139B (zh) * 2019-12-06 2022-04-08 中国原子能科学研究院 用于池式核反应堆的流量均分管道组件
CN111681787B (zh) * 2020-06-23 2022-09-30 中国科学院上海应用物理研究所 一种反应堆容器的下腔室结构及反应堆容器
CN112185600B (zh) * 2020-09-30 2022-02-01 中国核动力研究设计院 一种核反应堆下腔室阶梯式流量分配装置及分配结构
CN114382829B (zh) * 2022-01-10 2023-07-04 中广核工程有限公司 仪表导向组件压紧减振机构
CN114888734B (zh) * 2022-04-28 2023-05-12 中广核研究院有限公司 下部堆内构件检修设备的安装定位装置
CN116313188A (zh) * 2022-09-09 2023-06-23 深圳中广核工程设计有限公司 反应堆涡流抑制及流量分配装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85108386A (zh) * 1984-11-15 1986-09-03 西屋电气公司 多孔流体分配板
CN1020824C (zh) * 1988-02-11 1993-05-19 法玛通公司 核反应堆下部内部部件
JPH10111379A (ja) * 1996-10-04 1998-04-28 Mitsubishi Heavy Ind Ltd 加圧水型原子炉の内部構造
JP2002257971A (ja) * 2001-02-28 2002-09-11 Mitsubishi Heavy Ind Ltd 原子炉容器
CN1139939C (zh) * 1999-10-08 2004-02-25 法玛通公司 一种具有流量分配导流板的蒸汽发生器
WO2008100764A1 (fr) * 2007-02-12 2008-08-21 Westinghouse Electric Company Llc Appareil de jupe de flux de réacteur d'eau sous pression

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5259008A (en) * 1992-06-24 1993-11-02 Westinghouse Electric Corp. Staged depressurization system
JP3316459B2 (ja) * 1998-11-11 2002-08-19 三菱重工業株式会社 原子炉容器の炉内構造物
DE10127365A1 (de) * 2001-06-06 2002-12-12 Basf Ag Pumpe zur Förderung eines Wärmetauschmittels für einen Kontaktrohrbündelreaktor
US7270021B2 (en) * 2005-03-31 2007-09-18 Kabushiki Kaisha Toshiba Apparatus and method for mounting and moving a working apparatus on a structure for the performance of works on the structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85108386A (zh) * 1984-11-15 1986-09-03 西屋电气公司 多孔流体分配板
CN1020824C (zh) * 1988-02-11 1993-05-19 法玛通公司 核反应堆下部内部部件
JPH10111379A (ja) * 1996-10-04 1998-04-28 Mitsubishi Heavy Ind Ltd 加圧水型原子炉の内部構造
CN1139939C (zh) * 1999-10-08 2004-02-25 法玛通公司 一种具有流量分配导流板的蒸汽发生器
JP2002257971A (ja) * 2001-02-28 2002-09-11 Mitsubishi Heavy Ind Ltd 原子炉容器
WO2008100764A1 (fr) * 2007-02-12 2008-08-21 Westinghouse Electric Company Llc Appareil de jupe de flux de réacteur d'eau sous pression

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3075448A1 (fr) * 2017-12-19 2019-06-21 Electricite De France Ensemble de tranquillisation de flux de reacteur nucleaire
WO2019122699A1 (fr) * 2017-12-19 2019-06-27 Electricite De France Ensemble de tranquillisation de flux de reacteur nucleaire
KR20200100762A (ko) * 2017-12-19 2020-08-26 엘렉트리씨트 드 프랑스 원자로 흐름을 안정시키는 조립체
CN111684542A (zh) * 2017-12-19 2020-09-18 法国电力公司 核反应堆流动平稳组件
US11664131B2 (en) 2017-12-19 2023-05-30 Electricite De France Nuclear reactor flow calming assembly
KR102620916B1 (ko) 2017-12-19 2024-01-04 엘렉트리씨트 드 프랑스 원자로 흐름을 안정시키는 조립체
CN111684542B (zh) * 2017-12-19 2024-03-01 法国电力公司 核反应堆流动平稳组件
CN112185599A (zh) * 2020-09-30 2021-01-05 中国核动力研究设计院 一种带有帽形引流的核反应堆堆内流量分配装置及导流板
WO2023118920A1 (fr) * 2021-12-22 2023-06-29 Framatome Ensemble de stabilisation de flux pour réacteur nucléaire, réacteur et procédé associés

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CN103377735B (zh) 2016-08-03

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