WO2017020474A1 - 用于整体效应热工水力试验的堆芯模拟体 - Google Patents

用于整体效应热工水力试验的堆芯模拟体 Download PDF

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Publication number
WO2017020474A1
WO2017020474A1 PCT/CN2015/097236 CN2015097236W WO2017020474A1 WO 2017020474 A1 WO2017020474 A1 WO 2017020474A1 CN 2015097236 W CN2015097236 W CN 2015097236W WO 2017020474 A1 WO2017020474 A1 WO 2017020474A1
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Prior art keywords
core
copper
flange cover
thermal hydraulic
effect thermal
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PCT/CN2015/097236
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English (en)
French (fr)
Inventor
卢冬华
文青龙
徐海岩
张云光
李嘉明
吴小航
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中广核研究院有限公司
中国广核集团有限公司
中国广核电力股份有限公司
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Publication of WO2017020474A1 publication Critical patent/WO2017020474A1/zh

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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C23/00—Adaptations of reactors to facilitate experimentation or irradiation
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C17/00—Monitoring; Testing ; Maintaining
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C5/00—Moderator or core structure; Selection of materials for use as moderator
    • 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 the technical field of nuclear power plant reactor simulation test, in particular to a core simulation body for integral effect thermal hydraulic test.
  • the nuclear fuel fission in the reactor core generates huge thermal energy.
  • the water pumped into the reactor core by the main pump is heated into high temperature and high pressure water, and the high temperature and high pressure water generates the thermal energy band generated by the reactor core.
  • the heat is transmitted to the second circuit feed water outside the pipe through thousands of heat transfer tubes, and the feed water after the heat is released is pumped by the main pump.
  • the feed water circulates continuously in a closed loop.
  • the technical solution of the present invention is to provide a core simulating body for the overall effect thermal hydraulic test, which comprises a pressure cylinder, a hanging basket, a filling body, a core fuel simulating part and a copper rod.
  • the pressure receiving cylinder body has a hollow structure, and the upper and lower ends of the pressure receiving cylinder body are sealingly connected with a flange cover and a spherical sealing head respectively;
  • the hanging basket has a hollow structure and is suspended in the pressure receiving cylinder body a gap between the gondola and the inner wall of the pressure receiving cylinder;
  • the filling body is disposed in the hanging basket and encloses a required passage;
  • the core fuel simulating member is fixed to the passage a gap between the inside and the inner wall of the filling body;
  • the copper rod is fixed to the flange cover and the two ends are electrically connected to the external power system and the core fuel simulating member respectively, the copper rod Sealed with the flange cover by an insulating material.
  • the core fuel simulating component comprises a plurality of sets of heating tube bundles connected in series, and the first end of the heating tube bundle connected in series is electrically connected to the copper rod, and two adjacent heating tube bundles are respectively connected.
  • the core fuel simulating parts are made up of multiple sets of heating tube bundles in series to meet the power requirements of different core simulation bodies, and have very good adjustment convenience.
  • the insulator comprises a plurality of ceramic rods arranged at intervals, and the heating tube bundle is isolated by the ceramic rod, thereby ensuring the convenience of assembly and ensuring the safety of the operation of the device.
  • each set of the heating tube bundles comprises a plurality of electric heating tubes connected in parallel.
  • the top and bottom of the filling body are respectively fixed with a copper row and a supporting plate, and the lower ends of the plurality of heating tube bundles are respectively fixed to the supporting plate, and the upper ends of the plurality of the heating tube bundles are welded to the upper end. Said copper row.
  • the flange cover is provided with two through holes, and the two copper rods are respectively fixed in the through holes and protrude outside the flange cover, and the two copper rods respectively and the pile
  • the first end of the core fuel simulating component is electrically connected; the special structure connected by the copper rod and the core fuel simulating component enables the power interface to be located above the pressure cylinder body, thereby ensuring the convenience of power assembly and also solving the bottom heating. The problem of poor sealing is brought about.
  • the two copper rods are electrically connected to the first and last ends of the core fuel simulant through two sets of copper rafters.
  • the core simulating body for the integral effect thermal hydraulic test further comprises a sleeve and an asbestos pad, the sleeve being sleeved outside the copper rod and sealingly pressing against the copper rod Between the outer wall and the inner wall of the through hole, the asbestos pad is sealingly pressed between the copper rod and the flange cover; and the copper rod and the flange cover are sealed by the sleeve and the asbestos pad to solve the problem.
  • one end of the copper rod protrudes in a radial direction thereof with an abutting portion, and the asbestos pad is sealingly pressed between the abutting portion and the bottom plate of the flange cover.
  • the hanging basket is suspended in the pressure cylinder, and the interior of the hanging basket is surrounded by the filling body into a passage, and the core fuel
  • the analog component is fixed in the channel, and the positive and negative poles of the power supply are arranged at the first and the last ends of the core fuel simulant, and the core fuel simulant is electrically connected to the external power system through the copper rod on the flange cover located above it. connection.
  • the power input interface is arranged above the core simulation body, which solves the problem of poor sealing caused by the bottom heating in the prior art, and ensures the convenience of power assembly;
  • the core fuel simulation part passes Multiple sets of heating tube bundles are formed in series to meet the power requirements of different core simulating bodies, and have very good adjustment convenience, and the insulators for isolation provided between adjacent heating tube bundles ensure the convenience of assembly on the one hand, and On the one hand, the safety of the operation is ensured; in addition, the structure of the core simulation body is closer to the core flow path structure of the reactor prototype, so that the proportionality criterion can be better satisfied, and the thermal hydraulic phenomenon of the reactor can be better reflected; In addition, the core simulation body has a simple structure, a small volume, and good economy.
  • Figure 1 is a cross-sectional view of a core simulation body of the present invention for use in a holistic effect thermal hydraulic test.
  • FIG. 2 is another cross-sectional view of a core simulant for use in the overall effect thermal hydraulic test of the present invention.
  • Figure 3 is a top plan view of a core simulant for use in the overall effect thermal hydraulic test of the present invention.
  • Figure 4 is a partial enlarged view of the flange cover of Figure 1.
  • FIG. 5 is a partial schematic view of the heating tube bundle of Figure 1.
  • the core simulation body 100 for the overall effect thermal hydraulic test comprises a pressure cylinder body 110, a gondola 120, a filler body 130, a core fuel simulation component 140, and Copper rod 150.
  • the pressure cylinder body 110 has a hollow structure, and the upper end of the pressure cylinder body 110 is sealed by the flange cover 160, and an octagonal pad is arranged between the pressure bearing cylinder body 110 and the flange cover 160 to match the seal, the pressure cylinder Body 110 The lower end is sealingly welded with a spherical head 170; the pressure cylinder 110 ensures the safety of the entire system under high temperature and high pressure.
  • the gondola 120 has a hollow structure and is suspended in the pressure cylinder 110, and a gap is formed between the basket 120 and the inner wall of the pressure cylinder 110, and between the basket 120 and the spherical head 170.
  • the filling body 130 is disposed in the gondola 120 and encloses a desired square channel 131, which is ceramic.
  • the core fuel simulating member 140 is fixed in the passage 131 and has a certain gap between the inner wall of the filling body 130, and the core fuel simulating member 140 is disposed with a positive and negative electric source.
  • the copper rods 150 are fixed to the flange cover 160 and are electrically connected to the power supply of the external power system and the core fuel simulating member 140 respectively.
  • the copper rods 150 and the flange cover 160 are sealed by an insulating material.
  • the top of the filling body 130 is fixed with a copper row 132, and a supporting plate 133 is fixed at the bottom thereof.
  • the core fuel simulating member 140 is fixed between the copper row 132 and the supporting plate 133.
  • the core fuel simulating component 140 includes a plurality of sets of heating tube bundles 141 connected in series and an insulator 142 disposed between the adjacent two sets of heating tube bundles 141. The lower ends of the plurality of sets of heating tube bundles 141 are fixed to the supporting plate 133.
  • the upper ends of the plurality of heating tube bundles 141 are respectively soldered to the copper strips 132; and the first and the last ends of the plurality of sets of heating tube bundles 141 are respectively arranged with positive and negative poles of the power source, and the positive and negative poles of the power source are respectively electrically connected with the copper rods 150, thereby
  • the power input is realized above the core simulation body 100; the core fuel simulation member 140 is formed by connecting a plurality of sets of heating tube bundles 141 in series, which satisfies the power requirements of different core simulation bodies 100, and has very good adjustment convenience.
  • a core fuel simulating member 140 is formed in series by four sets of heating tube bundles 141, and four sets of heating tube bundles 141 are vertically arranged, and each set of heating tube bundles 141 includes a plurality of parallel electric batteries.
  • the heating tube 1411 and the plurality of electric heating tubes 1411 are evenly arranged.
  • each of the heating tube bundles 141 includes sixty-four parallel electric heating tubes 1411. Therefore, the total resistance meets the power design requirements.
  • the four sets of heating tube bundles 141 are separated by an insulator 142 having a cross-shaped structure.
  • the insulator 142 is composed of a plurality of spaced-apart ceramic rods 1421, and the four sets of heating tube bundles 141 are separated by the ceramic rods 1421 to avoid short-circuit burning.
  • the device on the one hand, guarantees the convenience of assembly and on the other hand ensures the safety of the operation of the device.
  • the power interface is disposed on the flange cover 160.
  • the flange cover 160 defines two through holes 161.
  • the two copper bars 150 are respectively fixed in the two through holes 161 and extend out of the flange cover 160.
  • the ends of the two copper bars 150 extending beyond the flange cover 160 are respectively provided.
  • Electrically connected to the external power system the other end of the two copper rods 150 passes through two sets of copper cymbals 180 and
  • the power supply of the core fuel simulating member 140 is electrically connected to the positive and negative electrodes.
  • two struts 190 are provided at the top end of the flange cover 160 for pre-assembly.
  • the structure and assembly thereof will be described.
  • one end of the copper rod 150 protrudes from the radial direction of the contact portion 151, and an asbestos pad 152 and a polyimide sleeve 153 are sequentially sleeved outside the copper rod 150, that is, asbestos pad.
  • 152 is located between the abutting portion 151 and the sleeve 153.
  • the copper rod 150 penetrates into the through hole 161 from below the flange cover 160 such that the abutting portion 151 is located below the bottom plate of the flange cover 160, and the sleeve 153 is sealingly pressed against the outer wall and the through hole of the copper rod 150.
  • the asbestos pad 152 is sealingly pressed between the abutting portion 151 and the bottom plate of the flange cover 160.
  • the two copper rods 150 and the positive and negative electrodes of the heating tube bundle 141 are electrically connected through two sets of copper rafters 180, respectively.
  • the special structure of the copper rod 150 and the heating tube bundle 141 is connected, so that the power interface is located above the whole device, which ensures the convenience of power assembly; at the same time, the copper rod 150 and the flange cover 160 are realized by the sleeve 153 and the asbestos pad 152.
  • the sealing solves the problem of poor sealing caused by the bottom heating in the prior art, and at the same time makes the flow path structure of the core simulation body 100 more similar to the flow path structure of the reactor prototype.
  • the pressure receiving cylinder 110 is further provided with an inlet pipe interface 111, an outlet pipe interface 112 and a sewage pipe interface, wherein the inlet pipe interface 111 and the outlet pipe interface 112 are slightly lower than the hanging basket. 120 and the hanging position of the pressure cylinder 110.
  • the core simulation body 100 of the present invention is used for heat source simulation of the reactor primary circuit in the nuclear industry overall effect test.
  • the main coolant enters the pressure cylinder 110 through the inlet pipe port 111, and flows downward from the passage between the inner wall of the pressure cylinder 110 and the gondola 120, in the spherical head 170. After the flow rate is distributed, the main coolant enters the passage 131 from the bottom of the basket 120, and the main coolant is heated when flowing through the heating tube bundle 141. The heated high temperature and high pressure coolant flows out through the outlet pipe interface 112 to enter the second circuit. system.
  • the flow path structure of the core simulation body 100 of the present invention is substantially consistent with the flow path structure of the reactor prototype, and the core simulation body 100 can realize the heating of the main coolant in the overall simulation test circuit of the reactor and ensure the safety of heating. And convenience.
  • the basket 120 is suspended in the pressure cylinder 110, and the interior of the basket 120 is surrounded by the filling body 130 into a passage 131, and the core fuel mold
  • the prototype 140 is fixed in the channel 131, and the positive and negative poles of the power supply are arranged at the beginning and the end of the core fuel simulating member 140, and the core fuel simulating member 140 is realized by the copper rod 150 on the flange cover 160 above it. Electrical connection of the external power system.
  • the power input interface is disposed above the core simulation body 100, which solves the problem of poor sealing caused by the bottom heating in the prior art, and ensures the convenience of power assembly;
  • the core fuel simulation part 140 is formed in series by a plurality of sets of heating tube bundles 141 to meet the power requirements of different core simulating bodies 100, and has very good adjustment convenience, and an insulator 142 for isolation is provided between adjacent heating tube bundles 141, which ensures on the one hand
  • the convenience of assembly on the other hand, ensures the safety of operation; furthermore, the structure of the core simulation body 100 is closer to the core flow path structure of the reactor prototype, so that the proportionality criterion can be better satisfied, and better The reactor thermal hydraulic phenomenon is reflected; in addition, the core simulation body 100 has a simple structure, a small volume, and good economy.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

一种用于整体效应热工水力试验的堆芯模拟体，包括承压筒体(110)、吊篮(120)、填充体(130)、堆芯燃料模拟件(140)及铜棒(150)；承压筒体(110)呈中空结构且上、下端分别密封地连接有法兰盖(160)及球形封头(170)；呈中空结构的吊篮(120)悬挂于承压筒体(110)内并与其内壁之间具有一定间隙；填充体(130)设于吊篮(120)内并围成所需通道(131)；堆芯燃料模拟件(140)固定于通道(131)内并与填充体(130)的内壁之间具有一定间隙；铜棒(150)固定于法兰盖(160)并与之通过绝缘材料密封，铜棒(150)两端分别与外部电力系统、堆芯燃料模拟件(140)电性连接。该堆芯模拟题将电力输入接口设于堆芯模拟体的上方，解决了底部加热所带来的密封不严问题，并保证电力装配的便利性，且结构简单、体积小、安全性高、经济性好。

Description

用于整体效应热工水力试验的堆芯模拟体 技术领域
本发明涉及核电站反应堆模拟试验技术领域，尤其涉及一种用于整体效应热工水力试验的堆芯模拟体。
背景技术
压水堆核电站的一回路系统中，反应堆堆芯内的核燃料裂变产生巨大的热能，由主泵泵入反应堆堆芯的水被加热成高温高压水，高温高压水把反应堆堆芯产生的热能带出反应堆压力容器并进入蒸汽发生器，当高温高压水通过蒸汽发生器时，通过数以千计的传热管把热量传给管外的二回路给水，释放热量后的给水又被主泵送回反应堆堆芯，给水不断地在密闭的一回路内循环。
鉴于一回路系统的反应堆压力容器的空间体积和经济性，在科研过程以及实践活动中无法直接按照其原型进行整体引用，而是需要在反应堆压力容器及其内部构件的基础上删繁就简并能够进行整体模拟。但现有的一种采用外置下降圆筒来模拟反应堆压力容器下降环腔的模拟装置，与反应堆原型的差别较大，不能完全满足相关的科研及实践活动需求；而与反应堆压力容器原型相似的模拟装置，均存在结构复杂、制造成本高的缺陷。且，上述模拟装置中，电力输入均从压力容器的下部实现，由此加重了下封头的负担，容易导致底部的密封不严。
因此，有必要提供一种结构简单、安装便利、安全性高、经济性好的堆芯模拟体，以克服上述现有技术的不足。
发明内容
本发明的目的在于提供一种结构简单、安装便利、安全性高、经济性好的用于整体效应热工水力试验的堆芯模拟体。
为实现上述目的，本发明的技术方案为：提供一种用于整体效应热工水力试验的堆芯模拟体，其包括承压筒体、吊篮、填充体、堆芯燃料模拟件及铜棒； 所述承压筒体呈中空结构，且所述承压筒体的上、下端分别密封地连接有法兰盖及球形封头；所述吊篮呈中空结构并悬挂于所述承压筒体内，所述吊篮与所述承压筒体的内壁之间具有一定间隙；所述填充体设于所述吊篮内并围成所需通道；所述堆芯燃料模拟件固定于所述通道内并与所述填充体的内壁之间具有一定间隙；所述铜棒固定于所述法兰盖且两端分别与外部电力系统、所述堆芯燃料模拟件电性连接，所述铜棒与所述法兰盖之间通过绝缘材料密封。
较佳地，所述堆芯燃料模拟件包括多组相串联的加热管束，串联后的所述加热管束的首尾端分别与所述铜棒电性连接，且相邻的两组所述加热管束之间均设有绝缘体，堆芯燃料模拟件采用多组加热管束串联而成，满足不同的堆芯模拟体的功率需求，具有非常好的调节便利性。
较佳地，所述绝缘体包括多个间隔排列的陶瓷棒，通过陶瓷棒将加热管束进行隔离，一方面保证了装配的便利性，另一方面保证了装置运行的安全性。
较佳地，每组所述加热管束均包括多个并联的电加热管。
较佳地，所述填充体的顶部及底部分别固定有铜排、支撑板，多组所述加热管束的下端均固定于所述支撑板，且多组所述加热管束的上端均焊接于所述铜排。
较佳地，所述法兰盖上开设有两通孔，两所述铜棒分别固定于两所述通孔内并伸出所述法兰盖外，两所述铜棒分别与所述堆芯燃料模拟件的首尾端电性连接；通过铜棒、堆芯燃料模拟件相连接的特殊结构，使得电力接口位于承压筒体的上方，保证了电力装配的便利性，也解决了底部加热所带来的密封不严的问题。
较佳地，两所述铜棒与所述堆芯燃料模拟件的首尾端之间分别通过两组铜辫子电性连接。
较佳地，所述用于整体效应热工水力试验的堆芯模拟体还包括套筒及石棉垫，所述套筒套设于所述铜棒外并密封地抵压于所述铜棒的外壁与所述通孔的内壁之间，所述石棉垫密封地抵压于所述铜棒与所述法兰盖之间；通过套筒、石棉垫实现铜棒与法兰盖的密封，解决了现有技术中底部加热所带来的密封不严的问题。
较佳地，所述铜棒的一端沿其径向凸设有抵触部，所述石棉垫密封地抵压于所述抵触部与所述法兰盖的底板之间。
与现有技术相比，由于本发明的用于整体效应热工水力试验的堆芯模拟体，其吊篮悬挂于承压筒体内，吊篮的内部由填充体围成一通道，堆芯燃料模拟件固定于通道内，并将电源正负极布置于堆芯燃料模拟件的首尾两端，堆芯燃料模拟件通过位于其上方的法兰盖上的铜棒实现与外部电力系统的电性连接。首先，将电力输入接口设于堆芯模拟体的上方，解决了现有技术中底部加热所带来的密封不严的问题，并保证了电力装配的便利性；其次，堆芯燃料模拟件通过多组加热管束串联形成，满足不同的堆芯模拟体功率需求，具有非常好的调节便利性，而相邻加热管束之间设置的用于隔离的绝缘体，一方面保证了装配的便利性，另一方面保证了运行的安全性；再者，堆芯模拟体的结构与反应堆原型的堆芯流道结构更加接近，因此，能更好的满足比例准则，更好的反映反应堆热工水力现象；另外，该堆芯模拟体的结构简单、体积小、经济性好。
附图说明
图1是本发明用于整体效应热工水力试验的堆芯模拟体的剖视图。
图2是本发明用于整体效应热工水力试验的堆芯模拟体的另一剖视图。
图3是本发明用于整体效应热工水力试验的堆芯模拟体的俯视图。
图4是图1中法兰盖的部分放大示意图。
图5是图1中加热管束的局部示意图。
具体实施方式
现在参考附图描述本发明的实施例，附图中类似的元件标号代表类似的元件。
如图1-3所示，本发明所提供的用于整体效应热工水力试验的堆芯模拟体100，包括承压筒体110、吊篮120、填充体130、堆芯燃料模拟件140及铜棒150。其中，承压筒体110呈中空结构，且承压筒体110的上端通过法兰盖160密封，且承压筒体110与法兰盖160之间设有八角垫以配合密封，承压筒体110 的下端密封地焊接有球形封头170；承压筒体110保证整个系统在高温高压下的运行安全。所述吊篮120呈中空结构并悬挂于承压筒体110内，且吊篮120与承压筒体110的内壁之间、吊篮120与球形封头170之间均具有一定间隙。填充体130设于吊篮120内并围成一所需的方形通道131，该填充体130为陶瓷。所述堆芯燃料模拟件140固定于通道131内并与填充体130的内壁之间具有一定间隙，且堆芯燃料模拟件140上布置有电源正负极。铜棒150固定于法兰盖160且两端分别与外部电力系统、堆芯燃料模拟件140的电源正负极电性连接，铜棒150与法兰盖160之间通过绝缘材料密封。
结合图1-2、5所示，填充体130的顶部固定有铜排132，其底部固定有支撑板133，堆芯燃料模拟件140固定于铜排132、支撑板133之间。具体地，所述堆芯燃料模拟件140包括多组相串联的加热管束141及设于相邻的两组加热管束141之间的绝缘体142，多组加热管束141下端均固定于支撑板133，多组加热管束141的上端均焊接于铜排132；并且，串联后的多组加热管束141的首尾端分别布置电源正负极，该电源正负极分别与铜棒150电性连接，从而在堆芯模拟体100的上方实现电力输入；堆芯燃料模拟件140采用多组加热管束141串联而成，满足不同的堆芯模拟体100的功率需求，具有非常好的调节便利性。
参看图5所示，本实施例中，通过四组加热管束141相串联形成堆芯燃料模拟件140，且四组加热管束141呈立式布置，每组加热管束141均包括多个并联的电加热管1411，多个电加热管1411均匀地排列，优选地，每组加热管束141均包括六十四根并联的电加热管1411。因此，总电阻满足电力设计需求。且，通过呈十字形结构的绝缘体142将四组加热管束141进行隔离，该绝缘体142由多个间隔排列的陶瓷棒1421组成，通过陶瓷棒1421将四组加热管束141进行隔离，以避免短路烧毁设备，一方面保证了装配的便利性，另一方面保证了装置运行的安全性。
再次参看图1-4所示，本发明中，为了保证电力安装的便利性，将电力接口布置于法兰盖160上。具体地，法兰盖160上开设有两通孔161，两铜棒150分别固定于两通孔161内并伸出法兰盖160外，两铜棒150的伸出法兰盖160外的一端与外部电力系统电性连接，两铜棒150的另一端通过两组铜辫子180与 堆芯燃料模拟件140的电源正负极电性连接。同时，为了便于安装两铜棒150，在法兰盖160的顶端设置两个撑子190进行预装。
以其中一个铜棒150为例，对其结构及装配进行说明。如图4所示，铜棒150的一端沿其径向凸设有抵触部151，一石棉垫152、一聚酰亚胺材质的套筒153依次套接于铜棒150外，即，石棉垫152位于抵触部151与套筒153之间。安装时，该铜棒150从法兰盖160的下方穿入一通孔161内，使抵触部151位于法兰盖160的底板下方，套筒153密封地抵压于铜棒150的外壁与通孔161的内壁之间，石棉垫152密封地抵压于抵触部151与法兰盖160的底板之间。两铜棒150安装完成后，两铜棒150与加热管束141的电源正负极之间分别通过两组铜辫子180电性连接。通过铜棒150、加热管束141相连接的特殊结构，使得电力接口位于整体设备的上方，保证了电力装配的便利性；同时，通过套筒153、石棉垫152实现铜棒150与法兰盖160的密封，解决了现有技术中底部加热所带来的密封不严的问题，同时使堆芯模拟体100的流道结构与反应堆原型的流道结构更相似。
再次参看图1-4所示，所述承压筒体110上还设有进口管接口111、出口管接口112及排污管接口，其中，进口管接口111、出口管接口112略低于吊篮120与承压筒体110的悬挂位置。
结合图1-5所示，本发明堆芯模拟体100用于核工业整体效应试验中反应堆一回路的热源模拟。
具体地，进行模拟试验时，主冷却剂经进口管接口111进入承压筒体110内，并由承压筒体110的内壁与吊篮120之间的通道向下流动，在球形封头170内，主冷却剂经流量分配后由吊篮120的底部进入通道131内，主冷却剂流经加热管束141时被加热，加热后的高温高压冷却剂再经由出口管接口112流出以进入二回路系统。本发明堆芯模拟体100的流道结构与反应堆原型的流道结构基本保持一致，通过该堆芯模拟体100能够实现对反应堆整体模拟试验回路中主冷却剂的加热，并保证加热的安全性和便利性。
由于本发明用于整体效应热工水力试验的堆芯模拟体100，其吊篮120悬挂于承压筒体110内，吊篮120的内部由填充体130围成一通道131，堆芯燃料模 拟件140固定于通道131内，并将电源正负极布置于堆芯燃料模拟件140的首尾两端，堆芯燃料模拟件140通过位于其上方的法兰盖160上的铜棒150实现与外部电力系统的电性连接。首先，将电力输入接口设于堆芯模拟体100的上方，解决了现有技术中底部加热所带来的密封不严的问题，并保证了电力装配的便利性；其次，堆芯燃料模拟件140通过多组加热管束141串联形成，满足不同的堆芯模拟体100功率需求，具有非常好的调节便利性，且，相邻加热管束141之间设有用于隔离的绝缘体142，一方面保证了装配的便利性，另一方面保证了运行的安全性；再者，堆芯模拟体100的结构与反应堆原型的堆芯流道结构更加接近，因此，能更好的满足比例准则，更好的反映反应堆热工水力现象；另外，该堆芯模拟体100的结构简单、体积小、经济性好。
以上所揭露的仅为本发明的优选实施例而已，当然不能以此来限定本发明之权利范围，因此依本发明申请专利范围所作的等同变化，仍属本发明所涵盖的范围。

Claims (9)

  1. 一种用于整体效应热工水力试验的堆芯模拟体，其特征在于：包括
    承压筒体，所述承压筒体呈中空结构，且所述承压筒体的上、下端分别密封地连接有法兰盖及球形封头；
    吊篮，所述吊篮呈中空结构并悬挂于所述承压筒体内，所述吊篮与所述承压筒体的内壁之间具有一定间隙；
    填充体，所述填充体设于所述吊篮内并围成所需通道；
    堆芯燃料模拟件，所述堆芯燃料模拟件固定于所述通道内并与所述填充体的内壁之间具有一定间隙；
    铜棒，所述铜棒固定于所述法兰盖且两端分别与外部电力系统、所述堆芯燃料模拟件电性连接，所述铜棒与所述法兰盖之间通过绝缘材料密封。
  2. 如权利要求1所述的用于整体效应热工水力试验的堆芯模拟体，其特征在于：所述堆芯燃料模拟件包括多组相串联的加热管束，串联后的所述加热管束的首尾端分别与所述铜棒电性连接，且相邻的两组所述加热管束之间均设有绝缘体。
  3. 如权利要求2所述的用于整体效应热工水力试验的堆芯模拟体，其特征在于：所述绝缘体包括多个间隔排列的陶瓷棒。
  4. 如权利要求2所述的用于整体效应热工水力试验的堆芯模拟体，其特征在于：每组所述加热管束均包括多个并联的电加热管。
  5. 如权利要求2所述的用于整体效应热工水力试验的堆芯模拟体，其特征在于：所述填充体的顶部及底部分别固定有铜排、支撑板，多组所述加热管束的下端均固定于所述支撑板，且多组所述加热管束的上端均焊接于所述铜排。
  6. 如权利要求1所述的用于整体效应热工水力试验的堆芯模拟体，其特征在于：所述法兰盖上开设有两通孔，两所述铜棒分别固定于两所述通孔内并伸出 所述法兰盖外，两所述铜棒分别与所述堆芯燃料模拟件的首尾端电性连接。
  7. 如权利要求6所述的用于整体效应热工水力试验的堆芯模拟体，其特征在于：两所述铜棒与所述堆芯燃料模拟件的首尾端之间分别通过两组铜辫子电性连接。
  8. 如权利要求6所述的用于整体效应热工水力试验的堆芯模拟体，其特征在于：还包括套筒及石棉垫，所述套筒套设于所述铜棒外并密封地抵压于所述铜棒的外壁与所述通孔的内壁之间，所述石棉垫密封地抵压于所述铜棒与所述法兰盖之间。
  9. 如权利要求8所述的用于整体效应热工水力试验的堆芯模拟体，其特征在于：所述铜棒的一端沿其径向凸设有抵触部，所述石棉垫密封地抵压于所述抵触部与所述法兰盖的底板之间。
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