KR101224023B1 - Residual heat removal and containment cooling system using passive auxiliary feed-water system for pressurized water reactor - Google Patents

Residual heat removal and containment cooling system using passive auxiliary feed-water system for pressurized water reactor Download PDF

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KR101224023B1
KR101224023B1 KR1020110091578A KR20110091578A KR101224023B1 KR 101224023 B1 KR101224023 B1 KR 101224023B1 KR 1020110091578 A KR1020110091578 A KR 1020110091578A KR 20110091578 A KR20110091578 A KR 20110091578A KR 101224023 B1 KR101224023 B1 KR 101224023B1
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cooling
passive
tube
residual heat
pipe
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KR1020110091578A
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Korean (ko)
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김문수
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한국수력원자력 주식회사
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    • 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
    • G21C15/24—Promoting flow of the coolant
    • G21C15/257—Promoting flow of the coolant using heat-pipes
    • 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
    • G21C15/18—Emergency cooling arrangements; Removing shut-down heat
    • G21C15/182—Emergency cooling arrangements; Removing shut-down heat comprising powered means, e.g. pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0054—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for nuclear applications
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C1/00—Reactor types
    • G21C1/04—Thermal reactors ; Epithermal reactors
    • G21C1/06—Heterogeneous reactors, i.e. in which fuel and moderator are separated
    • G21C1/08—Heterogeneous reactors, i.e. in which fuel and moderator are separated moderator being highly pressurised, e.g. boiling water reactor, integral super-heat reactor, pressurised water reactor
    • G21C1/086—Pressurised water reactors
    • 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

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  • 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

PURPOSE: A residual heat removal and a containment cooling system using a passive auxiliary feed-water system for a pressurized water reactor are provided to use a water tub and a heat exchanger in a pressure containment vessel. CONSTITUTION: A passive auxiliary feedwater system includes a steam generator(10), a condensation bath(30), a vapor supplying pipe(11) and a condensed water recovery pipe(12). A steam generator generates vapor by using the heat of a nuclear reactor. The condensation bath comprises a heat exchanger(20). The vapor supplying pipe supplies the vapor generated in the steam generator to the heat exchanger. The condensed water recovery pipe supplies the condensed water of the heat exchanger to the steam generator.

Description

피동보조 급수계통을 이용한 경수로의 응급잔열제거 및 격납용기 냉각계통{Residual heat removal and containment cooling system using passive auxiliary feed-water system for pressurized water reactor}Residual heat removal and containment cooling system using passive auxiliary feed-water system for pressurized water reactor

본 발명은 경수로의 응급잔열제거 및 격납용기 냉각계통에 관한 것으로서, 특히 격납용기의 피동냉각 기능 및 일차측 응급잔열제거 기능을 수행할 수 있도록 된 피동보조 급수계통을 이용한 경수로의 응급잔열제거 및 격납용기 냉각계통에 관한 것이다. The present invention relates to emergency residual heat removal and storage container cooling system of the light-water reactor, and in particular, emergency residual heat removal and storage of the light-water reactor using the passive auxiliary water supply system capable of performing the passive cooling function of the containment vessel and the primary emergency residual heat removal function. It relates to a container cooling system.

현재 가동중인 경수로는 일반적으로 원자로 사고 후 급수계통이 작동하지 않을 경우, 펌프를 이용하는 보조급수계통이 작동하여 원자로의 잔열을 증기발생기를 통해 제거하고 있다. 펌프를 사용하는 보조급수계통은 운전원의 실수, 전원상실, 펌프의 오작동 등에 의해 실패의 가능성이 있다. Currently, the light water reactors currently in operation are generally operated after the reactor accident, in which the water supply system does not operate, and a subwater supply system using a pump is activated to remove residual heat of the reactor through the steam generator. The auxiliary water supply system using the pump is likely to fail due to operator error, power loss, malfunction of the pump, and so on.

이러한 문제점을 해결하기 위해 원자로 사고 시 증기발생기의 이차측에서 발생하는 증기를 응축하여 원자로 잔열을 피동적으로 냉각함으로써, 원자력발전소의 안전성과 경제성을 높일 수 있는 피동형 이차 응축계통의 개념이 제안되고 있으며 (특허문헌1 참조), 일차측에서 피동으로 잔열을 제거할 수 있는 수단으로서, AP600과 같은 로형에서는 피동 잔열제거계통이 일차측 잔열을 재장전 수조탱크(IRWST; In-containment Refueling Water Storage Tank)를 이용하여 제거하는 개념이 제안되고 있다. 그러나, 상기 두 계통 모두 격납용기 내부의 온도와 압력을 제어하는 장치 기능을 갖추고 있지는 않다. In order to solve this problem, the concept of a passive secondary condensation system is proposed to increase the safety and economic efficiency of nuclear power plants by passively cooling the residual heat of the reactor by condensing steam generated at the secondary side of the steam generator during a reactor accident. Patent Document 1), as a means for removing residual heat passively on the primary side, in a furnace such as AP600, the passive residual heat removal system uses an in-containment refueling water storage tank (IRWST). The concept of removing by using is proposed. However, neither system is equipped with a device function to control the temperature and pressure inside the containment vessel.

도 1은 종래의 피동 잔열제거계통을 개괄적으로 도시한 도면이다. 도 1에 도시한 바와 같이, 피동 잔열제거계통은 원자력발전소에서 격납용기(미도시) 내 원자로(1: reactor vessel)와 연결된 증기발생기(10), 재장전 수조탱크(50) 및 가압기(60; pressurizer)로 구성된다. 1 is a view schematically showing a conventional passive residual heat removal system. As shown in FIG. 1, the passive residual heat removal system includes a steam generator 10 connected to a reactor vessel 1, a reload water tank 50, and a pressurizer 60 in a nuclear power plant (not shown). pressurizer).

이러한 종래의 피동 잔열제거계통의 작동에 대해 간략히 설명하면, 대형 냉각재 상실사고 같은 냉각재 유출 사고 시, 상기 가압기(60)의 압력이 급격히 감압되어 원자로 냉각재의 압력이 상기 재장전 수조탱크(50)와 원자로 냉각재 계통의 수두차 이하로 감소되면, 상기 재장전 수조탱크(50) 내에 설치된 열교환기에 고온의 일차측 냉각수가 주입되고 상기 재장전 수조탱크(50)에서 열교환을 통해 자연대류방식에 의해 노심과 원자로(1)의 잔열을 제거한다. When the operation of the conventional passive residual heat removal system is briefly described, in the case of a coolant leakage accident such as a large coolant loss accident, the pressure of the pressurizer 60 is suddenly reduced so that the pressure of the reactor coolant is reduced with the reload tank 50. When the temperature of the reactor coolant system is reduced to less than or equal to the water head difference, a high-temperature primary coolant is injected into the heat exchanger installed in the reloading tank 50, and the core and the core are heated by natural convection through heat exchange in the reloading tank 50. Residual heat of the reactor 1 is removed.

그러나, 종래의 피동 잔열제거계통은 격납건물 내에 재장전 수조탱크(50)를 일차측보다 높게 설치해야 하는 단점, 격납건물 내에 전용 배관 및 상기 재장전 수조탱크(50)에 전용의 열교환기를 설치해야 하는 단점, 그리고 격납용기 내부의 온도와 압력을 낮추는 수단이 구비되어 있지 않아 별도의 방법을 강구해야 하는 단점이 있다. However, the conventional passive residual heat removal system has the disadvantage that the reload tank tank 50 must be installed higher than the primary side in the containment building, the dedicated pipe in the containment building and a dedicated heat exchanger should be installed in the reload tank tank 50. There is a disadvantage in that a method for lowering the temperature and pressure inside the containment container is not provided and a separate method must be taken.

한편, 또 다른 피동 잔열제거계통 관련기술로서, 증기발생기가 구비된 일체형원자로의 유사시에 피동적으로 잔열제거가 이루어지는 잔열제거계통에 관한 것으로 주증기배관과 주급수배관을 각각 연결하여 피동냉각이 이루어지게 하는 일체형원자로의 피동 잔열제거계통이 알려져 있다(특허문헌2 참조). Meanwhile, another passive residual heat removal system-related technology relates to a residual heat removal system in which residual heat is passively removed in the event of an integral reactor equipped with a steam generator. The passive cooling is performed by connecting the main steam pipe and the main water supply pipe, respectively. A passive residual heat removal system as an integrated reactor is known (see Patent Document 2).

특허문헌1 : 한국등록특허 10-1022164Patent Document 1: Korea Patent Registration 10-1022164

특허문헌2 : 한국등록특허 10-1028053Patent Document 2: Korea Patent Registration 10-1028053

이에 본 발명은 상기와 같은 문제점을 해결하기 위한 것으로서, 격납용기의 냉각기능 및 일차측 응급잔열제거 기능을 수행할 수 있도록 된 피동보조 급수계통을 이용한 경수로의 응급잔열제거 및 격납용기 냉각계통을 제공하는데 그 목적이 있다. Accordingly, the present invention is to solve the problems as described above, to provide an emergency residual heat removal and storage container cooling system of a light water reactor using a passive auxiliary water supply system that can perform the cooling function and the primary emergency residual heat removal function of the containment container. Its purpose is to.

상기와 같은 목적을 달성하기 위하여 본 발명에 따른 피동보조 급수계통을 이용한 경수로의 응급잔열제거 및 격납용기 냉각계통은, 피동보조 급수계통과; 상기 피동보조 급수계통과 연결되는 격납용기 냉각계통을 포함하여 이루어지되, 상기 격납용기 냉각계통 내에 피동보조 급수계통과 격납용기 냉각계통의 열교환을 통해 격납용기의 피동냉각 및 일차측 응급잔열을 제거하도록 되어 있고, 상기 피동보조 급수계통은, 원자로의 열에 의해 증기를 발생시키는 증기발생기와; 냉각수가 충진되며 냉각수 내에는 상기 증기발생기에서 발생되는 증기를 상부 모관에 공급받고, 하부 모관을 통해 응축수를 배출하는 직선구간의 일부 또는 전부가 경사지게 형성된 응축기 튜브를 포함하는 열교환기가 위치하고 있는 응축수조와; 상기 증기발생기에서 발생되는 증기를 상기 열교환기로 공급하기 위한 증기 공급배관과; 상기 열교환기의 응축수를 상기 증기발생기로 공급하기 위한 응축수 회수배관을 포함하여 이루어지고, 상기 격납용기 냉각계통은, 저온관과 고온관을 포함하는 격납용기내 원자로와; 상기 격납용기 내 원자로의 냉각수를 열교환하기 위한 튜브가 구비된 응축기 풀과; 상기 저온관과 튜브를 연결하며 중간에는 잔열 제거 필요시 개방되는 개폐밸브가 설치되는 제1 연결배관과; 상기 고온관과 튜브를 연결하며 중간에는 잔열 제거 필요시 개방되는 개폐밸브가 설치되는 제2 연결배관과; 상기 튜브에 연결되며 중간에는 격납용기의 피동냉각 필요시 개방되는 개폐밸브가 설치되는 응축튜브 연결관과; 상기 튜브에서 열교환되어 발생되는 응축수를 재장전 수조탱크로 방출하기 위한 관으로서 중간에는 격납용기의 피동냉각 필요시 개방되는 개폐밸브가 설치되는 응축수 방출관을 포함하여 이루어진 것을 특징으로 한다. Emergency residual heat removal and storage vessel cooling system of the light water reactor using the passive auxiliary water supply system according to the present invention, the passive auxiliary water supply system to achieve the above object; It includes a containment vessel cooling system connected to the passive auxiliary water supply system, so as to remove the passive cooling and primary emergency residual heat of the containment vessel through heat exchange of the passive auxiliary water supply system and the containment vessel cooling system in the containment container cooling system. The passive auxiliary water supply system includes: a steam generator for generating steam by heat of the reactor; A condensate tank in which a coolant is filled and a heat exchanger including a condenser tube in which the steam generated by the steam generator is supplied to the upper capillary and the straight section for discharging condensate through the lower capillary is inclined; A steam supply pipe for supplying steam generated in the steam generator to the heat exchanger; A condensate return pipe for supplying the condensed water of the heat exchanger to the steam generator, wherein the containment vessel cooling system comprises: a reactor in a containment vessel including a low temperature tube and a high temperature tube; A condenser pool having a tube for heat-exchanging cooling water of the reactor in the containment vessel; A first connection pipe which connects the low temperature pipe and the tube and has an opening / closing valve installed in the middle thereof to remove residual heat; A second connection pipe connecting the high temperature pipe and the tube and having an opening / closing valve installed in the middle to remove residual heat; A condensation tube connecting tube connected to the tube and having an opening / closing valve installed in the middle thereof to be opened when required for passive cooling of the containment vessel; A tube for discharging the condensate generated by heat exchange in the tube to the reload tank tank, characterized in that it comprises a condensate discharge tube is installed in the middle of the opening and closing valve is opened when the required cooling of the containment vessel.

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여기에서, 상기 피동보조 급수계통의 응축수 회수배관과 상기 격납용기 냉각계통의 응축수 풀은 잔열 제거 또는 격납용기의 피동냉각 필요시 개방되는 개폐밸브가 중간에 설치되어 있는 제3 연결배관으로 연결되어 있고, 상기 피동보조 급수계통의 증기 공급배관과 상기 격납용기 냉각계통의 응축수 풀은 잔열 제거 또는 격납용기의 피동냉각 필요시 개방되는 개폐밸브가 중간에 설치되어 있는 제4 연결배관으로 연결될 수 있다. Here, the condensate return pipe of the passive auxiliary water supply system and the condensate pool of the containment container cooling system are connected to a third connecting pipe having an opening / closing valve installed in the middle to remove residual heat or to require passive cooling of the containment container. The steam supply pipe of the passive auxiliary water supply system and the condensate pool of the containment container cooling system may be connected to a fourth connection pipe in which an on / off valve that is opened when the residual heat is removed or the passive cooling of the containment container is opened.

본 발명에 따르면, 피동보조 급수계통의 기능에 일차측 잔열 제거계통의 기능과 피동 격납용기 냉각기능이 추가될 수 있고, 상기 피동보조 급수계통의 수조와 열교환기를 격납용기 내에서 격리된 계통으로 이용함으로써 상기 피동보조 급수계통의 건전성을 유지할 수가 있다. According to the present invention, the function of the passive auxiliary water supply system can be added to the function of the primary side residual heat removal system and the cooling of the passive containment vessel, using the water tank and the heat exchanger of the passive auxiliary water supply system as an isolated system in the containment vessel. By doing so, the integrity of the driven auxiliary water supply system can be maintained.

도 1은 종래의 피동 잔열제거계통을 개괄적으로 도시한 도면.
도 2는 본 발명에 따른 피동보조 급수계통을 이용한 경수로의 응급잔열제거 및 격납용기 냉각계통을 개략적으로 도시한 구성도. 1 is a view schematically showing a conventional passive residual heat removal system.
Figure 2 is a schematic diagram showing the emergency residual heat removal and storage vessel cooling system of the light water reactor using the passive auxiliary water supply system according to the present invention.

이하, 본 발명의 바람직한 실시예를 첨부된 도면들을 참조하여 상세히 설명한다. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명에 따른 피동보조 급수계통을 이용한 경수로의 응급잔열제거 및 격납용기 냉각계통은, 격납용기의 냉각기능 및 일차측 응급잔열제거 기능을 수행할 수 있도록, 크게 피동보조 급수계통(PAFS; Passive Auxiliary Feed-water System)과, 상기 피동보조 급수계통과 연결되는 격납용기 냉각계통을 포함하여 이루어지는데, 상기 격납용기 냉각계통 내에 피동보조 급수계통과 격납용기 냉각계통의 열교환을 통해 격납용기의 피동냉각 및 일차측 응급잔열을 제거하도록 되어 있다. Emergency residual heat removal and containment vessel cooling system of the light water reactor using the passive auxiliary water supply system according to the present invention, so as to perform the cooling function of the containment vessel and the primary emergency residual heat removal function of the containment vessel, the passive auxiliary water supply system (PAFS; Passive Auxiliary) Feed-water system), and the containment container cooling system connected to the passive auxiliary water supply system, wherein the passive cooling of the containment vessel is performed through heat exchange between the passive auxiliary water supply system and the containment container cooling system in the containment container cooling system. The primary emergency residual heat is to be removed.

구체적으로, 상기 피동보조 급수계통은, 원자로의 열에 의해 증기를 발생시키는 증기발생기(10) 및 냉각수가 충진되며 냉각수 내에는 상기 증기발생기(10)에서 발생되는 증기를 상부 모관에 공급받고, 하부 모관을 통해 응축수를 배출하는 직선구간의 일부 또는 전부가 경사지게 형성된 격리 응축기 튜브(7)를 포함하는 열교환기(20)가 위치하고 있는 응축수조(30)를 구비한다. Specifically, the passive auxiliary water supply system is filled with the steam generator 10 and the cooling water to generate steam by the heat of the reactor, the cooling water is supplied to the upper mother pipe to the steam generated by the steam generator 10, the lower mother pipe It is provided with a condensate tank 30 in which a heat exchanger 20 including an isolated condenser tube 7 formed inclined part or all of the straight section for discharging condensate through.

그리고, 상기 피동보조 급수계통은, 상기 증기발생기(10)에서 발생되는 증기를 상기 열교환기(20)로 공급하기 위한 증기 공급배관(11) 및 상기 열교환기(20)의 응축수를 상기 증기발생기(10)로 공급하기 위한 응축수 회수배관(12)을 구비한다. 그리고, 상기 열교환기(20)는 상기 증기발생기(10)에서 발생되는 증기를 증기 공급배관(11)을 통해 상부 모관에 공급받고, 하부 모관을 통해 응축수를 배출하는 직선구간의 일부 또는 전부가 경사지게 형성된 격리 응축기 튜브(7)를 포함한다. The passive auxiliary water supply system includes a steam supply pipe 11 for supplying steam generated from the steam generator 10 to the heat exchanger 20, and condensed water from the heat exchanger 20. 10) a condensate return pipe 12 for supplying. In addition, the heat exchanger 20 receives the steam generated by the steam generator 10 to the upper mother pipe through the steam supply pipe 11, so that part or all of the straight sections for discharging condensed water through the lower mother pipe are inclined. An isolated condenser tube 7 formed.

상기 격납용기 냉각계통은, 저온관(Cold leg:3)과 고온관(Hot leg:5)을 포함하는 격납용기 내 원자로(1) 및 상기 격납용기 내 원자로(1)의 냉각수를 열교환하기 위한 튜브(28)가 구비된 응축기 풀(27)를 구비한다. 구체적으로, 상기 튜브(28)는 상기 피동보조 급수계통과 연결되어 격납용기 냉각계통과 열교환이 가능하도록 구비된다. The containment vessel cooling system is a tube for heat-exchanging the reactor 1 in a containment vessel including a cold leg 3 and a hot leg 5 and a cooling water of the reactor 1 in the containment vessel. And a condenser pool 27 with 28. Specifically, the tube 28 is connected to the driven auxiliary water supply system is provided to allow heat exchange with the containment vessel cooling system.

그리고, 상기 격납용기 냉각계통은, 상기 저온관(3)과 튜브(28)를 연결하며 중간에는 잔열 제거 필요시 개방되는 개폐밸브(V21)가 설치되는 제1 연결배관(8), 상기 고온관(5)과 튜브(28)를 연결하며 중간에는 잔열 제거 필요시 개방되는 개폐밸브(V20)가 설치되는 제2 연결배관(9), 상기 튜브(28)에 연결되며 중간에는 격납용기의 피동냉각 필요시 개방되는 개폐밸브(V32)가 설치되는 응축튜브 연결관(31) 및 상기 튜브(28)에서 열교환되어 발생되는 응축수를 재장전 수조탱크(50)로 방출하기 위한 관으로서 중간에는 격납용기의 피동냉각 필요시 개방되는 개폐밸브(V34)가 설치되는 응축수 방출관(33)을 구비한다. The containment vessel cooling system connects the low temperature pipe 3 and the tube 28 with a first connection pipe 8 having an opening / closing valve V21 that is opened when a residual heat is required in the middle, and the high temperature pipe. (5) and the tube 28 is connected to the second connecting pipe (9), the tube 28 is installed in the middle of the opening and closing valve (V20) is opened when necessary to remove residual heat in the middle of the passive cooling of the containment vessel Condensation tube connecting pipe 31 is provided with an opening and closing valve (V32) is opened if necessary and a tube for discharging the condensate generated by heat exchange in the tube 28 to the reload tank 50, the middle of the containment vessel It is provided with a condensate discharge pipe 33 is provided with an on-off valve (V34) that is opened when the passive cooling required.

그리고, 상기 피동보조 급수계통의 응축수 회수배관(12)과 상기 격납용기 냉각계통의 응축수 풀(27)은 잔열 제거 또는 격납용기의 피동냉각 필요시 개방되는 개폐밸브(V25)가 중간에 설치되어 있는 제3 연결배관(23)에 의해 연결된다. 그리고, 상기 피동보조 급수계통의 증기 공급배관(11)과 상기 격납용기 냉각계통의 응축수 풀(27)은 잔열 제거 또는 격납용기의 피동냉각 필요시 개방되는 개폐밸브(V26)가 중간에 설치되어 있는 제4 연결배관(24)에 의해 연결된다.
The condensate return pipe 12 of the passive auxiliary water supply system and the condensate pool 27 of the containment container cooling system are provided with an opening / closing valve V25 that is opened in the middle of removing residual heat or requiring passive cooling of the containment container. It is connected by the third connecting pipe (23). In addition, the steam supply pipe 11 of the passive auxiliary water supply system and the condensate pool 27 of the containment container cooling system are provided with an opening / closing valve V26 which is opened in the middle when residual heat is removed or when passive cooling of the containment container is required. It is connected by the fourth connecting pipe 24.

이제, 본 발명에 따른 피동보조 급수계통을 이용한 경수로의 응급잔열제거 및 격납용기 냉각계통의 작동에 대하여 설명하기로 한다. Now, the emergency residual heat removal and operation of the containment vessel cooling system of the light water reactor using the passive auxiliary water supply system according to the present invention will be described.

먼저, 잔열 제거가 필요하면 잔열 제거 신호에 의해 상기 개폐밸브(V20,V21)가 개방되어, 상기 튜브(28) 내의 응축수가 중력에 의해 상기 저온관(3)로 유입된다. 그리고, 이와 동시에 상기 개폐밸브(V25,V26)가 개방되면서 피동보조 급수계통의 피동 이차축 냉각과 유사한 메커니즘으로 상기 응축기 풀(27) 내에서 열교환이 이루어지며, 일차측 내부의 잔열을 제거하게 된다. First, when residual heat removal is required, the on-off valves V20 and V21 are opened by the residual heat removal signal, and the condensed water in the tube 28 flows into the low temperature tube 3 by gravity. At the same time, the on-off valves V25 and V26 are opened, and a heat exchange is performed in the condenser pool 27 by a mechanism similar to the driven secondary shaft cooling of the driven auxiliary water supply system, thereby removing residual heat inside the primary side. .

또한, 격납용기 내 원자로(1)에서 냉각재 상실사고 등이 발생하여, 많은 양의 증기가 흘러나와 격납용기 내부 압력과 온도 상승을 유발함에 따라 격납용기의 피동냉각이 필요하게 되면, 피동냉각 신호가 발생하여 응축기 연결관(31)에 구비된 개폐밸브(V32) 및 응축수 방출관(33)에 구비된 개폐밸브(V34)가 개방된다. 그리고, 이와 동시에, 피동보조 급수계통과 연결된 제3,4연결배관(23,24)에 설치된 개폐밸브(V25,V26)가 개방되면서 응급잔열 제거방식과 같은 원리로 상기 응축기 풀(27)에서 열교환되어 발생된 응축수가 응축수 방출관(33)을 통해 재장전 수조탱크(50)로 방출됨으로써 격납용기 내 원자로(1) 내부 온도와 압력을 낮추게 된다. In addition, when a coolant loss accident occurs in the reactor 1 in the containment vessel and a large amount of steam flows out, causing a pressure inside the containment vessel and a rise in temperature, the passive cooling signal of the containment vessel is required. The opening and closing valve V32 provided in the condenser connecting pipe 31 and the opening and closing valve V34 provided in the condensate discharge pipe 33 are opened. At the same time, the on-off valves V25 and V26 installed in the third and fourth connection pipes 23 and 24 connected to the driven auxiliary water supply system are opened, and heat exchange in the condenser pool 27 in the same manner as the emergency residual heat removal method. The condensate generated is discharged to the reload tank 50 through the condensate discharge pipe 33 to lower the temperature and pressure inside the reactor 1 in the containment vessel.

이와 같이, 종래의 피동형 이차측 보조 급수계통(PAFS)의 기능에 일차측 잔열 제거계통의 기능과 피동 격납용기 냉각 기능이 추가될 수 있고, 종래의 격납용기 내 압력 및 온도제어와는 무관한 계통인 PAFS에 피동 잔열제거 및 격납용기 냉각기능을 추가하여 격납용기의 피동냉각 및 살수계통 기능을 보조함으로써 건전성 향상에 도움을 줄 수 있다. 또한, 상기 피동보조 급수계통의 수조와 열교환기를 격납용기 내에서 격리된 계통으로 이용함으로써 상기 피동보조 급수계통의 건전성을 확보할 수 있다. Thus, the function of the primary side secondary water supply system (PAFS) can be added to the function of the primary side residual heat removal system and the passive containment cooling function, and is independent of the pressure and temperature control in the conventional containment vessel. By adding passive residual heat removal and containment cooling to PAFS, it helps to improve the integrity by supporting the passive cooling and watering system of the containment. In addition, by using the water tank and the heat exchanger of the passive auxiliary water supply system as an isolated system in the containment vessel, it is possible to ensure the integrity of the passive auxiliary water supply system.

한편, 본 발명에 따른 피동보조 급수계통을 이용한 경수로의 응급잔열제거 및 격납용기 냉각계통을 한정된 실시예에 따라 설명하였지만, 본 발명의 범위는 특정 실시예에 한정되는 것은 아니며, 본 발명과 관련하여 통상의 지식을 가진자에게 자명한 범위내에서 여러 가지의 대안, 수정 및 변경하여 실시할 수 있다. On the other hand, although the emergency residual heat removal and storage vessel cooling system of the hard water reactor using the passive auxiliary water supply system according to the present invention has been described according to a limited embodiment, the scope of the present invention is not limited to a specific embodiment, in relation to the present invention Various alternatives, modifications, and changes can be made within the scope apparent to those skilled in the art.

따라서, 본 발명에 개시된 실시예 및 첨부된 도면들은 본 발명의 기술 사상을 한정하기 위한 것이 아니라 설명하기 위한 것이고, 이러한 실시예 및 첨부된 도면에 의하여 본 발명의 기술 사상의 범위가 한정되는 것은 아니다. 본 발명의 보호 범위는 아래의 청구범위에 의하여 해석되어야 하며, 그와 동등한 범위 내에 있는 모든 기술 사상은 본 발명의 권리범위에 포함되는 것으로 해석되어야 할 것이다.Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. . The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

1 : 원자로 3 : 저온관
5 : 고온관 7 : 격리 응축기 튜브
8 : 제1 연결배관 9 : 제2 연결배관
10 : 증기발생기 11 : 증기 공급배관
12 : 응축수 회수배관 20 : 열교환기
23 : 제3 연결배관 24 : 제4 연결배관
27 : 응축수 풀 28 : 튜브
30 : 응축수조 31 : 응축튜브 연결관
33 : 응축수 방출관 V20,V21,V25,V26,V32,V34 : 개폐밸브1: reactor 3: cold tube
5: high temperature tube 7: isolation condenser tube
8: first connection piping 9: second connection piping
10: steam generator 11: steam supply piping
12 condensate recovery pipe 20 heat exchanger
23: third connecting pipe 24: fourth connecting pipe
27: condensate pool 28: tube
30: condensate tank 31: condensation tube connector
33: Condensate discharge pipe V20, V21, V25, V26, V32, V34: On-off valve

Claims (4)

삭제delete 삭제delete 격납용기의 피동냉각 기능 및 일차측 응급잔열제거 기능을 수행할 수 있도록 된 계통으로서,
피동보조 급수계통과;
상기 피동보조 급수계통과 연결되는 격납용기 냉각계통을 포함하여 이루어지되,
상기 격납용기 냉각계통 내에 피동보조 급수계통과 격납용기 냉각계통의 열교환을 통해 격납용기의 피동냉각 및 일차측 응급잔열을 제거하도록 되어 있고,
상기 피동보조 급수계통은,
원자로의 열에 의해 증기를 발생시키는 증기발생기(10)와;
냉각수가 충진되며 냉각수 내에는 상기 증기발생기(10)에서 발생되는 증기를 상부 모관에 공급받고, 하부 모관을 통해 응축수를 배출하는 직선구간의 일부 또는 전부가 경사지게 형성된 격리 응축기 튜브(7)를 포함하는 열교환기(20)가 위치하고 있는 응축수조(30)와;
상기 증기발생기(10)에서 발생되는 증기를 상기 열교환기(20)로 공급하기 위한 증기 공급배관(11)과;
상기 열교환기(20)의 응축수를 상기 증기발생기(10)로 공급하기 위한 응축수 회수배관(12)을 포함하여 이루어지고,
상기 격납용기 냉각계통은,
저온관(3)과 고온관(5)을 포함하는 격납용기 내 원자로(1)와;
상기 격납용기 내 원자로(1)의 냉각수를 열교환하기 위한 튜브(28)가 구비된 응축기 풀(27)과;
상기 저온관(3)과 튜브(28)를 연결하며 중간에는 잔열 제거 필요시 개방되는 개폐밸브(V21)가 설치되는 제1 연결배관(8)과;
상기 고온관(5)과 튜브(28)를 연결하며 중간에는 잔열 제거 필요시 개방되는 개폐밸브(V20)가 설치되는 제2 연결배관(9)과;
상기 튜브(28)에 연결되며 중간에는 격납용기의 피동냉각 필요시 개방되는 개폐밸브(V32)가 설치되는 응축튜브 연결관(31)과;
상기 튜브(28)에서 열교환되어 발생되는 응축수를 재장전 수조탱크(50)로 방출하기 위한 관으로서 중간에는 격납용기의 피동냉각 필요시 개방되는 개폐밸브(V34)가 설치되는 응축수 방출관(33)을 포함하여 이루어진 것을 특징으로 하는 피동보조 급수계통을 이용한 경수로의 응급잔열제거 및 격납용기 냉각계통. As a system that can perform the passive cooling function of the containment vessel and the primary emergency residual heat removal function,
Driven auxiliary water system;
It includes a containment vessel cooling system connected to the passive auxiliary water supply system,
Passive cooling of the containment vessel and primary emergency residual heat are removed through heat exchange between the passive auxiliary water supply system and the containment vessel cooling system in the containment vessel cooling system,
The driven auxiliary water supply system,
A steam generator 10 generating steam by heat of the reactor;
Cooling water is filled and the cooling water is provided with the steam generated from the steam generator 10 to the upper capillary, and includes an isolated condenser tube (7) formed inclined part or all of the straight section to discharge the condensate through the lower capillary A condensate tank 30 in which the heat exchanger 20 is located;
A steam supply pipe (11) for supplying steam generated in the steam generator (10) to the heat exchanger (20);
It comprises a condensate recovery pipe 12 for supplying the condensed water of the heat exchanger 20 to the steam generator 10,
The containment vessel cooling system,
A reactor 1 in a containment vessel comprising a low temperature tube 3 and a high temperature tube 5;
A condenser pool 27 having a tube 28 for heat-exchanging cooling water of the reactor 1 in the containment vessel;
A first connection pipe (8) connecting the low temperature pipe (3) and the tube (28) and having an opening / closing valve (V21) installed in the middle to remove residual heat;
A second connecting pipe 9 connecting the high temperature pipe 5 and the tube 28 and having an opening / closing valve V20 installed in the middle thereof to remove residual heat;
A condensation tube connecting tube 31 connected to the tube 28 and having an opening / closing valve V32 that is opened in the middle when the driven cooling of the container is required;
Condensate discharge pipe 33 is a tube for discharging the condensed water generated by heat exchange in the tube 28 to the reload tank tank 50, the opening and closing valve (V34) is installed in the middle when the passive cooling of the containment container is required Emergency residual heat removal and storage vessel cooling system of the light water reactor using the passive auxiliary water supply system, characterized in that made. 청구항 3에 있어서,
상기 피동보조 급수계통의 응축수 회수배관(12)과 상기 격납용기 냉각계통의 응축수 풀(27)은 잔열 제거 또는 격납용기의 피동냉각 필요시 개방되는 개폐밸브(V25)가 중간에 설치되어 있는 제3 연결배관(23)으로 연결되어 있고, 상기 피동보조 급수계통의 증기 공급배관(11)과 상기 격납용기 냉각계통의 응축수 풀(27)은 잔열 제거 또는 격납용기의 피동냉각 필요시 개방되는 개폐밸브(V26)가 중간에 설치되어 있는 제4 연결배관(24)으로 연결되어 있는 것을 특징으로 하는 피동보조 급수계통을 이용한 경수로의 응급잔열제거 및 격납용기 냉각계통. The method according to claim 3,
The condensate return pipe 12 of the driven auxiliary water supply system and the condensate pool 27 of the containment container cooling system are provided with an opening / closing valve (V25) interposed between the remaining heat removal or the need for passive cooling of the containment container. Is connected to the connecting pipe 23, the steam supply pipe 11 of the passive auxiliary water supply system and the condensate pool 27 of the containment container cooling system is an on-off valve that is opened when the residual heat is removed or when the passive cooling of the containment container is required ( Emergency residual heat removal and containment vessel cooling system of the light water reactor using the passive auxiliary water supply system, characterized in that the V26) is connected to the fourth connecting pipe 24 is installed in the middle.
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CN103617815A (en) * 2013-12-05 2014-03-05 哈尔滨工程大学 Passive residual heat exhausting system of pressurized water reactor nuclear power plant
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