KR20090003960A - Multi-pod heat pipe - Google Patents

Multi-pod heat pipe Download PDF

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KR20090003960A
KR20090003960A KR1020070067804A KR20070067804A KR20090003960A KR 20090003960 A KR20090003960 A KR 20090003960A KR 1020070067804 A KR1020070067804 A KR 1020070067804A KR 20070067804 A KR20070067804 A KR 20070067804A KR 20090003960 A KR20090003960 A KR 20090003960A
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region
heat pipe
pod
heat
containment
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KR1020070067804A
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Korean (ko)
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김상녕
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경희대학교 산학협력단
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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
    • 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

A container cooling structure is provided to improve stability by installing a multi pod heat pipe in an upper side of the container as a heat sink. A multi pod heat pipe includes a boiling region, a condensation region and an adiabatic region. The boiling region and the condensation region are composed of a plurality of heat pipes. One end of the adiabatic region supports one end of the boiling region. The other end of the adiabatic region supports one end of the condensation region. The adiabatic region has a cylindrical shape. The multi pod heat pipe performs the function of the heat sink.

Description

멀티 포드 히트 파이프를 이용한 격납용기 피동냉각구조{Multi-Pod Heat Pipe}Containment vessel passive cooling structure using multi pod heat pipe {Multi-Pod Heat Pipe}

격납건물의 성능요건, 관통요건, 신뢰성, 피동형 등 관련요건을 완벽하게 만족시켜 건설, 운영, 유지에 많은 경제적 이익을 가져다 주는 피동 냉각 계통에 관한 것이다.The present invention relates to a passive cooling system that completely satisfies the related requirements such as performance, penetration, reliability, and passive of a containment structure, which brings many economic benefits to construction, operation, and maintenance.

LOCA사고는 물론이고 TLOFW나 SBLOCA 또는 SBO사고시 원자로가 노출된 후 1시간 이내에 노심 손상이 발생하며 25시간 이내에 FLC에 도달하는 것이 여러 안전해석 Code 결과이다. 이에 따라 SECy-93-087 및 SECy-90-016에서는 노심손상 후 24시간동안 FLC 이하로 격납용기 압력을 유지하기 위해 외부 냉각 수단 및 격납용기 Gas Vent 계통을 요구하고 있다.In addition to LOCA incidents, core damage occurs within one hour of reactor exposure during TLOFW, SBLOCA or SBO accidents, and reaching the FLC within 25 hours is the result of several safety analysis codes. Accordingly, SECy-93-087 and SECy-90-016 require external cooling means and containment gas vent systems to maintain containment pressure below FLC for 24 hours after core damage.

또한 COCFR 50.34(f)에서는 중대사고시 격납건물의 건전성 확보를 위해 직경이 3ft 이상인 배기 관통부 설치를 요구하고 있으며 믿을만한 해석결과 중대사고 기준을 만족시키면 관통부 설치를 면제할 수 있도록 하고 있다.In addition, COCFR 50.34 (f) requires the installation of exhaust penetrations of 3ft or more in diameter to ensure the integrity of containment buildings in case of serious accidents.

이러한 수단들은 격납건물의 성능요건, 관통요건, 신뢰성, 피동형 등 관련요건 만족이 매우 까다로우므로 사실상 많은 어려움이 예상된다.These measures are expected to be difficult in practice because they are very difficult to satisfy related requirements such as performance requirements, penetration requirements, reliability, passive type of containment.

또한, 이러한 외부냉각 수단이나 관통부 설치는 발전소 운영자에게 많은 부담(상주 소방차 대기, 급수요건 충족, filtering system 등)을 주고 있다. 따라서 신뢰성 있는 피동 냉각 계통이 개발된다면 이러한 2개의 부담을 한꺼번에 덜 수 있으며 건설, 운영, 유지에 많은 경제적 이익이 기대될 수 있을 것이다.In addition, the installation of such external cooling means or penetrating parts places a lot of burden on the power plant operator (residing in fire trucks, meeting water supply requirements, filtering systems, etc.). Therefore, if a reliable passive cooling system is developed, these two burdens can be alleviated at once and many economic benefits can be expected for construction, operation and maintenance.

본 발명에 따른 멀티 포드 히트 파이프를 이용한 격납용기 피동냉각구조는 격납용기 상부에 Multi-Pod Heat Pipe를 설치하여 원전의 사고시 Ultimate Heat Sink 역할을 수행하므로 중대사고시 안전성을 획기적으로 개선할 수 있도록 함을 목적으로 한다.Containment vessel passive cooling structure using a multi-pod heat pipe according to the present invention is to install the Multi-Pod Heat Pipe on the upper portion of the containment vessel to perform the role of Ultimate Heat Sink in the event of a nuclear power plant to significantly improve safety in the event of a serious accident The purpose.

본 발명에 따른 피동냉각구조의 Multi-Pod Heat Pipe는 수많은 Heat Pipe를 결합한 형태로 열 흡수부(Boiling Region)와, 열 방출구(Condensation Region)가 여러개의 Heat Pipe(Multi Pod)로 구성되며 단열부분(Adiabatic Region)은 이를 지지 가능한 단일 원통구조를 갖는다.Multi-Pod Heat Pipe of the passive cooling structure according to the present invention is composed of a plurality of heat pipes (Boarding Region), heat dissipation (Condensation Region) in the form of a combination of a number of heat pipes and insulated The diabatic region has a single cylindrical structure capable of supporting it.

이러한 Multi-Pod Heat Pipe는 격납용기 관통을 최소화하고 냉각성능, 피동형 등 원하는 성능요건을 완벽하게 갖추게 된다. This Multi-Pod Heat Pipe minimizes the penetration of containment vessel and fully meets the desired performance requirements such as cooling performance and passive type.

특히 격납건물 밖에 노출되는 응축부에서 대기와 자연대류에 의한 열전달 성능향상 방안(fin 설치)이 제시될 예정이다. 이에 관련된 실증실험을 통해 실현 가능성을 입증하고 이의 개념설계와 지적 소유권 확보를 위한 연구를 수행할 것이다.Particularly, a plan for improving the heat transfer performance by air and natural convection in the condensate exposed outside the containment building will be proposed. The empirical experiments related to this will prove its feasibility and conduct research to secure its conceptual design and intellectual property.

본 발명에 의하면, 고유가로 원전의 새로운 건설, 계속운전이 붐을 이루고 있으며 중대사고 대처 수단(안전 방안)도 일반화되고 있으므로 이에 대한 고유의 획기적인 기술을 갖춘다면 그 파급효과는 어마어마하다.According to the present invention, new construction and continued operation of nuclear power plants are booming due to high oil prices, and serious accident countermeasures (safety measures) are also common, so if the unique breakthrough technology is provided, the ripple effect is enormous.

상기 파급효과를 구체적으로 나열하면 다음과 같다.The ripple effects are listed in detail as follows.

첫 번째로 값비싸고 까다로운 ECSBS과 Gas Vent System을 값싸고 간단한 피동형 Multi Pod Heat Pipe로 대체 가능하다.First, it is possible to replace expensive and difficult ECSBS and gas vent system with cheap and simple driven multi pod heat pipe.

두 번째로 격납건물 관통을 최소화하고 보수유지가 반영구적이다.Second, the penetration of containment is minimized and maintenance is semi-permanent.

세 번째로 국내 원전의 고유 원천 기술로 Brand 이미지를 제고할 수 있다.Third, the brand image can be enhanced with the unique source technology of domestic nuclear power plants.

네 번째로 수출에 절대적 유리한 위치를 점할 수 있다.Fourth, it can take an absolute advantage in exports.

다섯 번째로 지적 소유권의 확보로 인한 Royalty가 예상된다.Fifth, royalties are expected due to intellectual property.

여섯 번째로 Ultmate Heat Sink 수단을 갖추므로 원전의 안전을 근본적으로 보장할 수 있다.Sixth, with Ultmate Heat Sink means, it is possible to fundamentally guarantee the safety of nuclear power plants.

일곱 번째로 격납용기 이중요건 만족, Missile Protection이 용이한 장점이 있다.Seventh, it satisfies the double requirement of containment and easy to missile protection.

본 발명에 따른 멀티 포드 히트 파이프를 이용한 격납용기 피동냉각구조의 바람직한 실시예에 대하여 첨부도면을 참조로 설명하면 다음과 같다.Referring to the accompanying drawings, a preferred embodiment of the containment vessel passive cooling structure using a multi-pod heat pipe according to the present invention will be described.

첨부도면 도 1은 멀티 포드 히트 파이프가 적용된 격납용기의 부분 확대도를 나타내고 있다.1 shows a partially enlarged view of a containment vessel to which a multi-pod heat pipe is applied.

LBLOCA사고는 물론이고 TLOFW나 SBLOCA사고시 원자로가 노출된 후 1시간 이내에 노심 손상이 발생하고 25시간 이내에 FLC(Factored Load Category)에 도달한다는 것이 안전해석 코드의 결과이다.The safety analysis code results, in addition to the LBLOCA incident, that core damage occurs within one hour after the reactor has been exposed in a TLOFW or SBLOCA accident and reaches the Factored Load Category (FLC) within 25 hours.

이에 따라 격납용기를 노심 손상 후 24시간 Severe Level C Limit이하로 유지하고 24시간 이후에는 이의 건전성을 유지하기 위해 Gas Vent System 및 외부 냉각 수단이 필요하며 이의 수단으로 다양한 개념이 고려되고 있다.Accordingly, gas vent system and external cooling means are needed to keep containment container below Severe Level C Limit after 24 hours of core damage and maintain its soundness after 24 hours, and various concepts are considered.

이러한 수단들은 격납건물의 성능요건, 관통요건, 신뢰성, 피동형 등 관련요건 만족이 매우 까다로우므로 사실상 많은 어려움이 예상된다. 따라서 본 발명에서는 격납용기 상부에 Multi-Pod Heat Pipe를 설치하여 원전의 사고시 Ultimate Heat Sink 역할을 수행하므로 중대사고시 안전성을 획기적으로 개선하게 되는 것이며, 바로 이러한 요건을 만족하는 것이 본 발명이 제안하는 Multi Pod Heat Pipe를 이용한 격납용기 냉각 계통으로서, 이와 같이 세계 초유의 개념도입으로 국산 원자력 발전소의 Brand 가치를 높이고 수출시 우위를 점할 수 있다.These measures are expected to be difficult in practice because they are very difficult to satisfy related requirements such as performance requirements, penetration requirements, reliability, passive type of containment. Therefore, in the present invention, by installing the Multi-Pod Heat Pipe on the upper part of the containment container, it performs the role of Ultimate Heat Sink in the event of a nuclear power plant accident, thereby greatly improving the safety in the event of a serious accident. As the containment cooling system using pod heat pipe, the concept of global colostrum can enhance the brand value of domestic nuclear power plants and take advantage of export.

물론 피동형 격납용기 냉각 개면이나 ECSBS등의 연구는 많았으나 본 연구에서 제안한 Multi Pod Heat Pipe 방식의 피동형 격납용기 냉각이나 ECSBS는 세계 최초이므로 국내외를 통틀어 연구나 개발이 전무하다. Of course, there have been many studies on the development of passive containment cooling or ECSBS, but there is no research or development at home or abroad since the proposed Multi Pod Heat Pipe type passive containment cooling or ECSBS is the first in the world.

본 발명의 Multi-Pod Heat Pipe는 수많은 Heat Pipe를 결합한 형태로 열 흡수부(Boiling Region)와, 열 방출구(Condensation Region)가 여러개의 Heat Pipe(Multi Pod)로 구성되며 단열부분(Adiabatic Region)은 이를 지지 가능한 단일 원통구조를 갖는다.Multi-Pod Heat Pipe of the present invention is a combination of a number of heat pipes, the heat absorbing (Boiling Region), the heat discharge (Condensation Region) is composed of a plurality of heat pipes (Multi Pod) and adiabatic region (Adiabatic Region) Has a single cylindrical structure capable of supporting it.

본 발명이 제안하는 냉각수단은 피동이며, 격납용기 관통부를 최소화하고 작동유체 및 영역을 최적화 하면 정상운전시에는 열손실이 거의 없다. 또한 지지 방식이나 보수 유지, Missile Protection, 격납건물의 이중요건 등을 잘 만족시켜 줄 수 있다.The cooling means proposed by the present invention is driven and there is little heat loss during normal operation by minimizing the penetration of the containment vessel and optimizing the working fluid and the area. In addition, it can meet the support requirements, maintenance, missile protection, and double requirements of containment.

이러한 Multi-Pod Heat Pipe는 격납용기 관통을 최소화하고 냉각성능, 피동형 등 원하는 성능요건을 완벽하게 갖추게 된다. This Multi-Pod Heat Pipe minimizes the penetration of containment vessel and fully meets the desired performance requirements such as cooling performance and passive type.

특히 격납건물 밖에 노출되는 응축부에서 대기와 자연대류에 의한 열전달 성능향상 방안(fin 설치)이 제시될 예정이다. 이에 관련된 실증실험을 통해 실현 가능성을 입증하고 이의 개념설계와 지적 소유권 확보를 위한 연구를 수행할 것이다.Particularly, a plan for improving the heat transfer performance by air and natural convection in the condensate exposed outside the containment building will be proposed. The empirical experiments related to this will prove its feasibility and conduct research to secure its conceptual design and intellectual property.

도 1은 멀티 포드 히트 파이프가 적용된 격납용기의 부분 확대도1 is a partially enlarged view of a containment vessel to which a multi-pod heat pipe is applied;

Claims (1)

멀티 포드 히트 파이프를 이용한 격납용기 피동냉각구조에 있어서,In the container passive cooling structure using a multi-pod heat pipe, 상기 격납용기 상부에 다수의 히트 파이프를 결합한 형태로 열 흡수부(Boiling Region)와, 상기 열흡수의 일단을 일단이 지지하고 타단은 열 방출구(Condensation Region)의 일단을 지지가능한 단열부(Adiabatic Region)를 단일체의 원통형상으로 구비된 멀티 포드 히트 파이프를 설치하는 것에 의해 최종적인 히트 싱크(Ultimate Heat Sink)의 역할을 수행하므로 중대사고시 안전성을 확보가능하도록 한 것을 특징으로 하는 멀티 포드 히트 파이프를 이용한 격납용기 피동냉각구조.A heat-absorbing portion (Boiling Region) and one end of the heat absorption and one end of the heat dissipation region (Adiabatic) capable of supporting one end of the heat dissipation region in the form of combining a plurality of heat pipes on the top of the containment vessel The multi pod heat pipe is characterized in that it performs the role of the ultimate heat sink by installing the multi pod heat pipe provided in a single cylindrical shape. Containment vessel passive cooling structure.
KR1020070067804A 2007-07-06 2007-07-06 Multi-pod heat pipe KR20090003960A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101456170B1 (en) * 2014-02-27 2014-10-31 한국원자력연구원 Passive containment air cooling device and system with isolated pressure boundary
KR101594789B1 (en) * 2014-09-19 2016-02-23 울산과학기술원 산학협력단 Decay Heat Removal System By Using Hybrid Heat Pipe Having Coolant And Neutron Absorber For Cooling A Nuclear Power Plant

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101456170B1 (en) * 2014-02-27 2014-10-31 한국원자력연구원 Passive containment air cooling device and system with isolated pressure boundary
US9711246B2 (en) 2014-02-27 2017-07-18 Korea Atomic Energy Research Institute Passive containment air cooling device and system with isolated pressure boundary
KR101594789B1 (en) * 2014-09-19 2016-02-23 울산과학기술원 산학협력단 Decay Heat Removal System By Using Hybrid Heat Pipe Having Coolant And Neutron Absorber For Cooling A Nuclear Power Plant

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