KR20180061501A - Design Method of Conditioning Signal for Emergency Core Cooling System - Google Patents

Design Method of Conditioning Signal for Emergency Core Cooling System Download PDF

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KR20180061501A
KR20180061501A KR1020160160048A KR20160160048A KR20180061501A KR 20180061501 A KR20180061501 A KR 20180061501A KR 1020160160048 A KR1020160160048 A KR 1020160160048A KR 20160160048 A KR20160160048 A KR 20160160048A KR 20180061501 A KR20180061501 A KR 20180061501A
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cooling system
core cooling
emergency core
signal
minutes
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Korean (ko)
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김성민
고동욱
김영애
박동환
류의승
유성창
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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
    • G21C15/18—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

Abstract

The present invention relates to a method for solving an issue for manually operating, by an operator, an emergency core cooling system by determining a loss-of-coolant accident since Wolseong nuclear power plant unit 1 has no corresponding signal while Wolseong nuclear power plants units 2, 3, and 4 are operated when a coolant low pressure signal among operating conditional signals of the emergency core cooling system is maintained at 5.52 MPa(a) for 10 minutes. According to the present invention, a method for designing a conditional signal of an emergency core cooling system of Wolseong nuclear power plant unit 1 of a heavy-water reactor, comprises the steps of: setting a pressure of a conditional signal of a loss-of-coolant accident from 5.52 Mpa(a) to 6.0 Mpa(a) when the conditional signal of an emergency core cooling system of Wolseong nuclear power plant unit 1 is designed; setting the duration of the conditional signal from 10 minutes to 5 minutes; and operating the emergency core cooling system upon reaching the conditional signal.

Description

비상노심냉각계통 조건부 신호 설계방법{Design Method of Conditioning Signal for Emergency Core Cooling System}{Design Method of Conditioning Signal for Emergency Core Cooling System}

본 발명은 비상노심냉각계통 동작 조건부 신호 중 냉각재저압신호에 대해 월성2,3,4호기는 5.52 MPa(a)에서 10분간 지속일 때 작동되고, 월성1호기는 해당신호가 없어 운전원이 냉각재상실사고를 판단하여 수동으로 비상노심냉각계통을 운전하는 방법을 해결하는 수단으로, 월성1호기의 비상노심냉각계통 조건부 신호 설계 시 냉각재 상실사고사고의 조건부 신호의 압력을 5.52Mpa(a)에서 6.0Mpa(a)로 설정하는 단계를 포함하고, 조건부 신호 지속시간을 10분에서 5분으로 설정하는 단계; 및 상기 조건 신호 도달 시 비상노심냉각계통(Emergency Core Cooling System)을 동작시키는 단계를 포함하는 중수로 월성 1호기의 비상노심냉각계통 조건부 신호 설계방법에 관한 것이다. The present invention is based on the assumption that the Wolsong 2, 3 and 4 units operate at 5.52 MPa (a) for 10 minutes and the Wolsong 1 unit does not have the corresponding signals, In order to solve the method of manually operating the emergency core cooling system by judging the accident, the pressure of the condition signal of the coolant accident accident accident in designing the condition signal of the emergency core cooling system of Wolsong 1 was changed from 5.52Mpa (a) to 6.0Mpa (a), the method comprising: setting a condition signal duration to 10 minutes to 5 minutes; And operating the Emergency Core Cooling System when the condition signal is reached. The present invention also relates to a method for designing an emergency core cooling system condition signal of the No. 1 heavy water reactor.

비상노심냉각계통 동작 조건부 신호중 냉각재저압신호에 대해 월성2,3,4호기는 5.52MPa(a)에서 10분간 지속일 때 작동되고, 월성1호기는 해당신호가 없어 운전원이 냉각재상실사고를 판단하여 수동으로 비상노심냉각계통을 수동으로 주입하여 평가한다.For the low pressure signal of the coolant in the emergency core cooling system operating condition signal, the Wolsong 2,3,4 unit operates at 5.52MPa (a) for 10 minutes, while the Wolsong 1 unit does not have the corresponding signal and the operator judges the coolant loss accident Manually inject and evaluate the emergency core cooling system manually.

Figure pat00001
Figure pat00001

* LOCA 신호 : 원자로모관 압력 5.52 MPa(a)* LOCA signal: reactor core pressure 5.52 MPa (a)

포인트레프로, 제틸리2호기, 엠발세 원전은 월성1호기 설계와 같으며, 월성2,3,4호기와 중국진산등은 월성2,3,4호기 설계와 같다.Point Lefro, Jetty 2, and M Beace are the same as those of Wolsong 1, Wolsong 2,3, and Jinshan of China are the same as Wolsong 2,3,4.

도 1은 월성 1호기 및 월성2,3,4호기 비상노심냉각계통 조건부 신호를 나타낸 것이다.FIG. 1 shows conditional signals of Wolsong 1 and Wolsong 2,3, 4 emergency core cooling system.

최근 평가 결과 상기 언급한 조건신호에서 비상노심냉각계통이 동작되지 않고 자동주입이 이루어지지 않아 노심손상빈도가 목표치를 초과하는 문제점이 있다.Recent Evaluation Results In the above-mentioned condition signal, the emergency core cooling system is not operated and automatic injection is not performed, so that the frequency of core damage exceeds the target value.

본 발명과 관련된 한국공개특허공보 제10-2014-0099130호에는 다단 안전주입 장치 및 이를 구비하는 피동안전주입계통을 위한 기술적 구성이 개시되어 있고, 한국공개특허공보 제10-2015-0064558호에는 오피동격납건물냉각계통 및 이를 구비하는 원전에 관한 기술적 구성이 개시되어 있으나, 이와 대비되는 본 발명은 월성1호기의 비상노심냉각계통 조건부 신호 설계 시 냉각재 상실사고사고의 조건부 신호 설정압력을 6.0Mpa(a)로 설정하는 단계; 및 조건부 신호를 유지하는 시간은 5분으로 설정하는 단계를 포함시켜 월성1호기 원전의 안정성 및 편리성을 향상시키는 유리한 효과가 있다.Korean Patent Laid-Open Publication No. 10-2014-0099130 related to the present invention discloses a multi-stage safety injection apparatus and a technical structure for a passive safety injection system including the multi-stage safety injection apparatus. In Korean Patent Laid-Open Publication No. 10-2015-0064558, The present invention relates to a cooling system of a containment building and a nuclear power plant having the cooling system of the containment building. However, the present invention contemplates a conditional signal setting pressure of a coolant accident accident accident when designing an emergency core cooling system condition signal of Wolsong 1, a); And the time for maintaining the conditional signal is set to 5 minutes, thereby improving the stability and convenience of the Wolsong-1 nuclear power plant.

본 발명이 해결하고자 하는 과제는 비상노심냉각계통이 동작되지 않고 자동주입이 이루어지지 않아 노심손상빈도가 목표치를 초과하는 문제을 해결하기 위하여 냉각재 상실사고사고의 조건부 신호 설정압력을 6.0Mpa(a)로 설정하고 이를 설정된 시간 동안 유지하도록 설계하는데 있다. The problem to be solved by the present invention is to solve the problem that the emergency core cooling system is not operated and automatic injection is not performed and the core damage frequency exceeds the target value, the condition signal setting pressure of the coolant loss accident accident is set to 6.0Mpa (a) And to maintain it for the set time.

본 발명 과제의 해결 수단은 중수로 월성 1호기의 비상노심냉각계통 조건부 신호 설계방법에 있어서, 월성1호기의 비상노심냉각계통 조건부 신호 설계 시 냉각재 상실사고사고의 조건부 신호의 압력을 6.0Mpa(a)로 설정하는 단계 및 조건부 신호를 설정된 시간으로 유지하는 단계를 포함하는 중수로 월성 1호기의 비상노심냉각계통 조건부 신호 설계방법을 제공하는데 있다.A method for designing an emergency core cooling system condition signal of heavy water reactor Wolsong No. 1 of the present invention is a method of designing a condition signal of an emergency core cooling system of Wolsong 1 at a pressure of 6.0Mpa (a) And maintaining the conditional signal at the set time. The present invention also provides a method for designing an emergency core cooling conditional signal of the Wuhan No. 1 heavy water reactor.

본 발명의 또 다른 과제의 해결 수단은 조건부 신호를 유지하는 시간은 5분으로 설정함을 특징으로 하는 중수로 월성 1호기의 비상노심냉각계통 조건부 신호 설계방법을 제공하는데 있다.A further object of the present invention is to provide a conditional signal design method for an emergency core cooling system of a No. 1 heavy water reactor of a heavy water reactor, wherein the time for maintaining the conditional signal is set to 5 minutes.

본 방법은 아주 작은 파단의 크기에도 비상노심냉각계통이 자동으로 동작되어 노심안전성을 확보할 수 있는 유리한 효과가 있다. This method has an advantageous effect that the emergency core cooling system is automatically operated even at a very small breakage size, thereby securing core safety.

본 발명에 따른 방법으로 인해 노심손상빈도는 목표치를 준수하게 되는 효과가 있다. The method according to the present invention has the effect that the core damage frequency can meet the target value.

도 1은 일차 계통 0.16% 파단시 원자로입구모관 판단회로 압력변화를 도시한 것이다.
도 2는 일차 계통 0.16% 파단시 원자로 입구 모관 파단회로 피복재 온도 변화를 도시한 것이다.
도 3은 비상 코어 냉각 장치의 개략도를 도시한 것이다. Figure 1 shows the pressure change of the reactor inlet capillary determination circuit at 0.16% break in the primary system.
Figure 2 shows the temperature change of the reactor inlet capillary rupture circuit cover during 0.16% failure of the primary system.
3 shows a schematic view of an emergency core cooling device.

본 발명을 실시하기 위한 구체적인 내용을 살펴본다. Hereinafter, the present invention will be described in detail.

본 발명은 비상노심냉각계통 동작 조건부 신호 중 냉각재저압신호에 대해 월성2,3,4호기는 5.52 MPa(a)에서 10분간 지속일 때 작동되고, 월성1호기는 해당신호가 없어 운전원이 냉각재상실사고를 판단하여 수동으로 비상노심냉각계통을 운전하는 방법을 해결하는 수단으로, 월성1호기의 비상노심냉각계통 조건부 신호 설계 시 냉각재 상실사고사고의 조건부 신호의 압력을 5.52Mpa(a)에서 6.0Mpa(a)로 설정하는 단계를 포함하고, 조건부 신호 지속시간을 10분에서 5분으로 설정하는 단계; 및 상기 조건 신호 도달 시 비상노심냉각계통(Emergency Core Cooling System)을 동작시키는 단계를 포함하는 중수로 월성 1호기의 비상노심냉각계통 조건부 신호 설계방법에 관한 것이다. The present invention is based on the assumption that the Wolsong 2, 3 and 4 units operate at 5.52 MPa (a) for 10 minutes and the Wolsong 1 unit does not have the corresponding signals, In order to solve the method of manually operating the emergency core cooling system by judging the accident, the pressure of the condition signal of the coolant accident accident accident in designing the condition signal of the emergency core cooling system of Wolsong 1 was changed from 5.52Mpa (a) to 6.0Mpa (a), the method comprising: setting a condition signal duration to 10 minutes to 5 minutes; And operating the Emergency Core Cooling System when the condition signal is reached. The present invention also relates to a method for designing an emergency core cooling system condition signal of the No. 1 heavy water reactor.

본 발명은 아주 작은 파단크기의 냉각재상실사고시 비상노심냉각계통이 동작되지 않는 중수로원전의 문제를 해결하고 비상노심냉각계통 조건부 신호가 없는 원전의 조건부 신설을 위해 냉각재상실사고 신호는 기존과 동일하게 유지하고(원자로모관 압력 5.52 MPa(a)) 조건부 신호를 냉각재계통압력 6.0 MPa(a) 에서 5분 지속으로 설계하는 방법이다. The present invention solves the problem of a heavy water reactor in which an emergency core cooling system is not operated in case of a coolant loss in the case of a very small breakage size, and maintains the coolant loss accident signal the same as the existing case for the conditional establishment of an emergency reactor cooling system (Reactor core pressure 5.52 MPa (a)) and the condition signal is designed to last for 5 minutes at the coolant system pressure 6.0 MPa (a).

냉각재 상실사고시 냉각재 압력이 감소되어 비상노심냉각계통이 동작된다. 이를 위해서는, In the event of a coolant failure, the coolant pressure is reduced and the emergency core cooling system operates. To do this,

- 1단계로, 냉각재 상실사고사고가 5.52 MPa(a)에서 발생한다.In step 1, a coolant loss accident occurs at 5.52 MPa (a).

- 2단계로, 표 2는 조건신호 도달시 비상노심냉각계통(Emergency Core Cooling System)이 동작된다.- Step 2, Table 2 shows the Emergency Core Cooling System operated when the condition signal is reached.

- ECCS가 동작되는 설계를 위해 표 2와 같은 3가지 민감도 평가를 통해 설계방안을 도출, 이때 해석치는 계측기 불확실도를 제외하고 해석을 수행한다.
For the design in which the ECCS is operated, the design method is derived from the three sensitivity evaluations shown in Table 2, and the analysis is performed except for the measurement uncertainty.

조건부 신호 설계 설정치Conditional signal design setpoint 조건부 신호 해석 설정치Conditional signal analysis setpoint Case #1Case # 1 5.52 MPa(a) + 10분 지속5.52 MPa (a) + lasting 10 minutes 5.25 MPa(a) + 10분 지속5.25 MPa (a) + lasts 10 minutes Case #2Case # 2 5.52 MPa(a) + 5분 지속5.52 MPa (a) + lasting 5 minutes 5.52 MPa(a) + 5분 지속5.52 MPa (a) + lasting 5 minutes Case #3Case # 3 6.00 MPa(a) + 5분 지속6.00 MPa (a) + lasting 5 minutes 5.73 MPa(a) + 5분 지속5.73 MPa (a) + lasting 5 minutes

민감도 평가결과 표2의 Case#3를 이용하여 설계시 연료 손상이 없다.
Sensitivity evaluation results are shown in Case # 3 of Table 2 and there is no fuel damage during design.

본 발명은 비상노심냉각계통 동작 조건부 신호 중 냉각재저압신호에 대해 월성2,3,4호기는 5.52 MPa(a)에서 10분간 지속일 때 작동되고, 월성1호기는 해당신호가 없어 운전원이 냉각재상실사고를 판단하여 수동으로 비상노심냉각계통을 운전하는 방법을 해결하는 방법으로, 월성1호기의 비상노심냉각계통 조건부 신호 설계 시 냉각재 상실사고사고의 조건부 신호의 압력을 5.52Mpa(a)에서 6.0Mpa(a)로 설정하는 단계를 포함하고, 조건부 신호 지속시간을 10분에서 5분으로 설정하는 단계; 및 상기 조건 신호 도달 시 비상노심냉각계통(Emergency Core Cooling System)을 동작시키는 단계를 포함하는 중수로 월성 1호기의 비상노심냉각계통 조건부 신호 설계방법에 관한 것이다. The present invention is based on the assumption that the Wolsong 2, 3 and 4 units operate at 5.52 MPa (a) for 10 minutes and the Wolsong 1 unit does not have the corresponding signals, In this paper, we propose a method of operating the emergency core cooling system manually by judging the accident. In the conditional signal design of the emergency core cooling system of Wolsong 1, the pressure of the condition signal of the coolant accident accident is changed from 5.52Mpa (a) (a), the method comprising: setting a condition signal duration to 10 minutes to 5 minutes; And operating the Emergency Core Cooling System when the condition signal is reached. The present invention also relates to a method for designing an emergency core cooling system condition signal of the No. 1 heavy water reactor.

Claims (2)

중수로 월성 1호기의 비상노심냉각계통 조건부 신호 설계방법에 있어서,
월성1호기의 비상노심냉각계통 조건부 신호 설계 시 냉각재 상실사고사고의 조건부 신호의 압력을 6.0Mpa(a)로 설정하는 단계; 및
조건부 신호를 설정된 시간으로 유지하는 단계를 포함하는 중수로 월성 1호기의 비상노심냉각계통 조건부 신호 설계방법.In this paper, we propose a conditional signal design method for emergency core cooling system of Wolsong 1,
(A) setting the pressure of the conditional signal of the coolant accident accident in the conditional signal design of emergency core cooling system of Wolsong 1 unit to 6.0Mpa (a); And
A method for conditional signal conditioning of an emergency core cooling system of a Wangsung 1 heavy water reactor, comprising the step of maintaining a conditional signal at a set time. 제1항에 있어서,
조건부 신호를 유지하는 시간은 5분으로 설정함을 특징으로 하는 중수로 월성 1호기의 비상노심냉각계통 조건부 신호 설계방법.The method according to claim 1,
And the time for maintaining the conditional signal is set to 5 minutes. The method for designing the conditional signal of the emergency core cooling system of the Wolseong No. 1 heavy water reactor.
KR1020160160048A 2016-11-29 2016-11-29 Design Method of Conditioning Signal for Emergency Core Cooling System KR20180061501A (en)

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CN112306065A (en) * 2019-11-30 2021-02-02 江苏悦达专用车有限公司 Intelligent environment recognition control system for sweeping and washing vehicle

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KR20090032374A (en) * 2007-09-27 2009-04-01 한국전력공사 Analysis method to determine limit time of the operator action during loss of coolant accident
KR101600710B1 (en) * 2014-10-27 2016-03-21 한국수력원자력 주식회사 Realistic Bounding Methodology of Mass/Energy Release for the Subcompartment Pressure/Temperature on High Energy Pipe Break at Nuclear Power Plant

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KR20090032374A (en) * 2007-09-27 2009-04-01 한국전력공사 Analysis method to determine limit time of the operator action during loss of coolant accident
KR101600710B1 (en) * 2014-10-27 2016-03-21 한국수력원자력 주식회사 Realistic Bounding Methodology of Mass/Energy Release for the Subcompartment Pressure/Temperature on High Energy Pipe Break at Nuclear Power Plant

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112306065A (en) * 2019-11-30 2021-02-02 江苏悦达专用车有限公司 Intelligent environment recognition control system for sweeping and washing vehicle

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