KR102047312B1 - Steam Generator Foreign Object Transfer Device - Google Patents

Steam Generator Foreign Object Transfer Device Download PDF

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KR102047312B1
KR102047312B1 KR1020170001540A KR20170001540A KR102047312B1 KR 102047312 B1 KR102047312 B1 KR 102047312B1 KR 1020170001540 A KR1020170001540 A KR 1020170001540A KR 20170001540 A KR20170001540 A KR 20170001540A KR 102047312 B1 KR102047312 B1 KR 102047312B1
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steam generator
tube
foreign matter
foreign
position sensor
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KR1020170001540A
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Korean (ko)
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KR20180080748A (en
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이영희
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한국수력원자력 주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/483—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers specially adapted for nuclear steam generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/52—Washing-out devices
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D5/00—Arrangements of reactor and engine in which reactor-produced heat is converted into mechanical energy
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

본 발명 증기발생기 이물질 이동장치는 증기발생기의 튜브다발 사이에 위치한 이물질을 검출하는 탐촉자와 상기 검출된 이물질이 부착되는 전자석과 상기 부착된 이물질의 위치를 확인할 수 있는 위치센서와 상기 탐촉자와 상기 위치센서의 신호를 전달하는 케이블로 구성된다.The present invention steam generator foreign material moving device is a probe for detecting a foreign material located between the tube bundle of the steam generator and the position sensor that can determine the position of the electromagnet and the attached foreign matter attached to the detected foreign matter and the transducer and the position sensor It consists of a cable to carry the signal.

Description

증기발생기 이물질 이동 장치{Steam Generator Foreign Object Transfer Device}Steam Generator Foreign Object Transfer Device

본 발명은 증기발생기 이물질 이동 장치에 관한 것으로서, 더 자세하게 튜브다발 내부로 이물질이 유입되었을 경우 이물질을 제거할 수 있도록 튜브다발 외부로 이동시키는 장치에 관한 것이다.The present invention relates to a steam generator foreign matter moving device, and more particularly to an apparatus for moving to the outside of the tube bundle to remove the foreign matter when the foreign matter is introduced into the tube bundle.

일반적으로 증기발생기는 원자로에서 발생한 열을 2차측으로 전달하여 증기를 발생시켜 터빈을 구동하게끔 하는 열교환기로서 원자력발전소에서 주요한 기기이다.In general, the steam generator is a heat exchanger that transfers the heat generated from the reactor to the secondary side to generate steam to drive the turbine is a major device in the nuclear power plant.

증기발생기에서 증기를 발생시키기 위하여 2차 계통으로부터 급수가 공급되고 있으며 급수가 공급되는 공간(2차측)은 다수의 튜브(한국형 증기발생기당 튜브수량 : 약8,200개)가 설치되어 있다 급수가 공급되는 튜브다발 지역은 제작 시 시운전 또는 정상 운전 중에 이물질이 유입되는 사례가 다수 발생하고 있다.Water is supplied from the secondary system to generate steam in the steam generator, and the water supply space (secondary side) is provided with a number of tubes (about 8,200 tubes per Korean steam generator). In the tube bundle area, there are many cases where foreign matter enters during commissioning or normal operation during manufacturing.

증기발생기 2차측 내부에 유입된 잔존 이물질이 외부로 빠져나가지 않고 증기발생기 내부에 잔존할 경우 공급된 급수의 유동력에 의하여 튜브 바깥 표면과 이물질 간에 마찰에 의한 튜브 마모 현상이 발생할 수 있다.When the remaining foreign matter introduced into the steam generator secondary side remains inside the steam generator without escaping to the outside, the tube wear phenomenon may occur due to friction between the outer surface of the tube and the foreign matter due to the flow force of the supplied water.

잔존 이물질의 종류, 형태 및 크기에 따라 차이가 있지만, 잔존 이물질이 튜브 표면과 지속적으로 마찰을 할 경우 아주 얇은 두께의 튜브는 아모에 의한 손상으로 구멍이 발생하게 되며 이는 튜브내부에 흐르는 1차측 방사능 유체가 비방사능 지역인 2차측 계통 전체로 누설되는 사고를 일으킬 가능성이 있으며, 이는 원전 안전운영에 심각한 영향을 주게 된다.Although there are differences depending on the type, shape and size of the remaining foreign matter, if the remaining foreign material constantly rubs against the tube surface, the very thin thickness of the tube will cause holes due to the damage caused by the hair, which is the primary radioactivity flowing inside the tube. There is a possibility of fluid leaking into the entire secondary system, which is a non-radioactive area, which will seriously affect the safety operation of nuclear power plants.

따라서 원자력 발전소에서는 시운전기간 및 발전소 계획예방정비기간에 증기발생기 튜브 와전류탐상검사와 증기발생기 2차측 튜브다발지역을 육안검사 하여 잔존 이물질 유무를 검사하고 있으며 필요시 이물질 제거 장비(파이브스코프 또는 FOSAR 장비)를 사용하여 이물질을 제거한다.Therefore, the nuclear power plant is visually inspecting the steam generator tube eddy current inspection and the steam generator secondary tube bundle area during the commissioning period and during the preventive maintenance plan of the power plant to check the presence of foreign matters, and if necessary, remove foreign substances (five scope or FOSAR equipment). Remove foreign substances using.

국내 증기발생기 타입중 한국형 증기발생기는 튜브간격이 2.9mm로 이물질 제거장비 직경(5mm)보다 작아서 튜브다발 내부로 이물질이 유입되었을 경우 제거가 어려우며, 튜브시트 상단부 이외의 지역(예 튜브 지지대 지역등)에 이물질은 제거가 불가능하므로 설비 건전성에 심각한 문제가 발생할 수 있다.Among the Korean steam generator types, the Korean steam generator has a tube spacing of 2.9mm, which is smaller than the diameter of the foreign material removal equipment (5mm), making it difficult to remove foreign matters inside the tube bundle, and other than the upper part of the tube sheet (eg tube support area, etc.). Foreign matter cannot be removed, which can cause serious problems with the integrity of the plant.

등록특허공보 제10-1513776호(공고일자: 2015.04.20)Registered Patent Publication No. 10-1513776 (Notice date: 2015.04.20)

본 발명의 실시 예는 이러한 종래기술의 문제점을 해결하기 위한 것으로서, 튜브다발 내부로 이물질이 유입되었을 경우 이물질을 튜브다발 외곽으로 이동시키기 위한 장치를 제공 하고자 한다.An embodiment of the present invention is to solve the problems of the prior art, to provide an apparatus for moving the foreign matter to the outside of the tube bundle when foreign matter is introduced into the tube bundle.

이러한 목적을 달성하기 위한 본 발명 증기발생기 이물질 이동장치는 증기발생기의 튜브다발 사이에 위치한 이물질을 검출하는 탐촉자;와 상기 검출된 이물질이 부착되는 전자석;과 상기 부착된 이물질의 위치를 확인할 수 있는 위치센서;와 상기 탐촉자와 상기 위치센서의 신호를 전달하는 케이블;로 구성된다.The present invention steam generator foreign matter moving device for achieving this object is a probe for detecting a foreign material located between the tube bundle of the steam generator; and an electromagnet to which the detected foreign matter is attached; and the position to confirm the location of the attached foreign matter Sensor; and a cable for transmitting signals of the transducer and the position sensor.

바람직하게, 상기 전자석은 이물질을 회전시켜 이동하기 위한 모터를 더 포함한다. Preferably, the electromagnet further includes a motor for rotating the foreign matter to move.

바람직하게, 상기 케이블은 상기 모터에 전력을 공급하는 것을 특징으로한다.Preferably, the cable is characterized in that for supplying power to the motor.

본 발명 증기발생기 이물질 이동 장치는 튜브다발 내부로 이물질이 유입되어도 기존 제거장비가 제거할 수 있는 위치까지 이물질을 이동할 수 있고, 튜브로부터 방사능유체 누출 사고를 방지할 수 있으며 원자력발전소의 안전성을 보장하고 시운전 및 계획 예방정비 공정 지연으로 인해 생기는 경제적 손실을 막을 수 있다.The present invention steam generator foreign matter moving device can move the foreign matter to the position that can be removed by the existing removal equipment, even if foreign matter is introduced into the tube bundle, can prevent the leakage of radioactive fluid from the tube and ensure the safety of nuclear power plants Eliminate economic losses due to commissioning and preventive maintenance process delays.

도 1은 본 발명 증기발생기 이물질 이동 장치의 사시도,
도 2는 본 발명 증기발생기 이물질 이동 장치의 실시도,
도 3은 본 발명 증기발생기 이물질 이동 장치의 확대도,
도 4는 본 발명 증기발생기 이물질 이동 장치의 평면도.1 is a perspective view of a steam generator foreign substance moving device of the present invention,
2 is an embodiment of the present invention steam generator foreign matter moving device,
Figure 3 is an enlarged view of the steam generator foreign substance moving apparatus of the present invention,
Figure 4 is a plan view of the steam generator foreign substance moving apparatus of the present invention.

본 발명의 실시 예에서 제시되는 특정한 구조 내지 기능적 설명들은 단지 본 발명의 개념에 따른 실시 예를 설명하기 위한 목적으로 예시된 것으로, 본 발명의 개념에 따른 실시 예들은 다양한 형태로 실시될 수 있다. 또한 본 명세서에 설명된 실시 예들에 한정되는 것으로 해석되어서는 아니 되며, 본 발명의 사상 및 기술 범위에 포함되는 모든 변경물, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다.Specific structures or functional descriptions presented in the embodiments of the present invention are only illustrated for the purpose of describing the embodiments according to the inventive concept, and the embodiments according to the inventive concept may be implemented in various forms. In addition, it should not be construed as limited to the embodiments described herein, but should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

이하에서는 첨부된 도면을 참조하여 본 발명에 대해 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

도 1은 본 발명 증기발생기 이물질 이동 장치의 사시도이다.1 is a perspective view of a steam generator foreign substance moving apparatus of the present invention.

설명하기에 앞서 본 발명 증기발생기 이물질 이동장치는 이해를 돕기 위해 이동장치(1)로 부르도록 한다.Prior to the description, the steam generator foreign substance moving device of the present invention will be referred to as the moving device 1 for better understanding.

이동장치는(1) 튜브내경(약 3/4인치)과 이물질(40)이 존재하는 위치 즉 증기발생기(10) 튜브시트 상단두께(약600mm)를 고려하여 제작된다.The moving device is manufactured by considering the inside diameter of the tube (about 3/4 inch) and the position where the foreign material 40 exists, that is, the top thickness of the tube sheet (about 600 mm) of the steam generator 10.

도에 도시된 바와 같이 증기발생기(10)의 튜브(20)다발 사이에 위치한 이물질(40)을 검출하는 탐촉자(100)와, 검출된 이물질(40)이 부착되는 전자석(200)과, 부착된 이물질(40)의 위치를 확인할 수 있는 위치센서(300)와, 탐촉자(100)와 위치센서(300)의 신호를 전달하는 케이블(400);로 구성된다.As shown in the figure, the probe 100 for detecting the foreign matter 40 located between the bundle of the tube 20 of the steam generator 10, the electromagnet 200 to which the detected foreign matter 40 is attached, It consists of a position sensor 300 that can determine the position of the foreign material 40, and the cable 400 for transmitting the signal of the transducer 100 and the position sensor 300.

전자석(200)은 수직축을 기준으로 360도 회전 가능한 모터(210)를 구비하며 부착된 이물질(40)을 이동 시킬 수 있다.Electromagnet 200 has a motor 210 that can be rotated 360 degrees with respect to the vertical axis and can move the attached foreign matter 40.

케이블(400)은 모터(210)에 전력을 공급해주고 상기 탐촉자(100)와 위치센서(300)의 신호를 수신장치(미도시)로 전달해 사용자가 이물질(40)의 위치를 확인할 수 있다.The cable 400 supplies power to the motor 210 and transmits the signals of the transducer 100 and the position sensor 300 to a receiver (not shown) so that the user can check the position of the foreign substance 40.

도 2는 본 발명 증기발생기 이물질 이동 장치의 실시도이며, 도 3은 본 발명 증기발생기 이물질 이동 장치의 확대도이고 도 4는 본 발명 증기발생기 이물질 이동 장치의 평면도이다.Figure 2 is an embodiment of the present invention steam generator debris moving device, Figure 3 is an enlarged view of the steam generator debris moving device of the present invention and Figure 4 is a plan view of the steam generator debris moving device of the present invention.

도에 도시된 바와 같이 와전류탐상검사로 이물질(40) 신호가 검출된 튜브(20) 위치를 확인 한다. 그리고 해당 튜브(20) 내부로 이동장치(1)를 삽입하고 영구자석 또는 전자석(200)에 의해 이물질(40)을 튜브(20) 바깥에 부착시킨 후 수직축을 기준으로 360도 회전이 가능한 모터(210)를 회전시켜 이물질(40)을 회전하여 이동 시킨다. 원하는 위치에 이물질(40)이 이동하면 튜브(20)에서 삽입된 이동장치(1)를 빼내고 이동하고자 하는 경로에 위치한 튜브(20)에 삽입하여 이물질을 이동한다. 이러한 방법으로 튜브(20)다발을 이동한 후 와전류탐상검사 과정을 반복하여 이물질(40)의 이동경로를 확인 할 수 있다. 기존 이물질(40) 제거 장비가 접근 가능한 튜브(20)다발 2차측 환형공간(최외곽)으로 이물질(40)을 이동시킨다.As shown in the figure, the position of the tube 20 in which the foreign material 40 signal is detected by the eddy current inspection is checked. And insert the moving device (1) into the tube 20, the foreign material 40 is attached to the outside of the tube 20 by a permanent magnet or electromagnet 200, and then the motor capable of rotating 360 degrees around the vertical axis ( By rotating 210, the foreign material 40 is rotated and moved. When the foreign matter 40 moves to a desired position, the foreign material 40 is removed by inserting the moving device 1 inserted from the tube 20 into the tube 20 located in the path to be moved. In this way, after moving the bundle of tubes 20, the eddy current inspection process can be repeated to check the movement path of the foreign material 40. Existing foreign material 40 removes the foreign material 40 to the tube 20, the secondary side annular space (outermost) to the accessible tube 20.

2차측 환형공간(최외곽)에 위치한 이물질(40)은 기존의 이물질제거장비(파이브스코프 또는 FOSAR 장비)를 이용하여 제거 할 수 있다.Foreign matter 40 located in the secondary side annular space (outermost) can be removed using a conventional foreign matter removal equipment (five scope or FOSAR equipment).

이물질(40)이 튜브(20)시트 바닥에 완전 고착되어 있거나 크기가 튜브(20)간격(2.9mm)보다 작을 경우 이물질(40)은 전자석(200)이 붙어있는 방향에 부착되어 같이 회전을 하게 된다.When the foreign matter 40 is completely fixed to the bottom of the tube 20 sheet or the size is smaller than the spacing (2.9 mm) of the tube 20, the foreign matter 40 is attached in the direction in which the electromagnet 200 is attached to rotate. do.

단, 이물질(40)이 튜브(20) 간격보다 큰 것은 튜브(20)다발 내부로 유입도 될 수 없으므로 튜브(20) 간격보다 작은 것으로 추정할 수 있다.However, since the foreign matter 40 is larger than the tube 20 interval, it may be estimated that the foreign matter 40 is smaller than the tube 20 interval since it cannot be introduced into the tube 20 bundle.

또한 이동장치(1)는 각 발전소에 기 보유하고 있는 증기발생기(10) 와전류탐상검사장치(30)에 설치하여 이동하거나 별도로 이동 장비를 제작하여 사용할 수 있다.In addition, the moving device 1 may be installed and moved to the steam generator 10 and the current flaw detection device 30 which is already held in each power plant, or may be manufactured and used separately.

이상에서 설명한 본 발명은 전술한 실시 예 및 첨부된 도면에 의해 한정되는 것이 아니고, 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 여러 가지 치환, 변형 및 변경이 가능함은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 명백할 것이다.The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and alterations are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

1 : 이동장치 10 : 증기발생기
20 : 튜브 30 : 와전류탐상검사장치
40 : 이물질 100 : 탐촉자
200 : 전자석 210 : 모터
300 : 위치센서 400 : 케이블 1: moving device 10: steam generator
20 tube 30 eddy current flaw inspection device
40: foreign material 100: probe
200: electromagnet 210: motor
300: position sensor 400: cable

Claims (3)

증기발생기의 튜브다발 사이에 위치한 이물질을 검출하는 탐촉자;
상기 탐촉자의 상부에 구비되고, 상기 검출된 이물질이 부착되는 전자석;
상기 탐촉자의 하부에 구비되고, 상기 이물질을 회전시켜 이동하기 위한 모
터;
상기 모터의 하부에 구비되고, 상기 부착된 이물질의 위치를 확인할 수 있는
위치센서;
상기 위치센서의 하부에 구비되고, 상기 탐촉자의 신호와 상기 위치센서의 신호를 전달하는 케이블을 포함하며,
상기 탐촉자, 상기 전자석, 상기 모터 및 상기 위치센서는 한 몸체를
이루되, 상기 증기발생기의 튜브 내부에 삽입되도록 상기 튜브의 내경보다 작은 외경을 갖는 관형인 것을 특징으로 하며,
상기 케이블은,
상기 모터에 전력을 공급하는 것을 특징으로 하는 증기발생기 이물질 이동장치.
A probe for detecting a foreign substance located between the tube bundles of the steam generator;
An electromagnet provided on the probe and to which the detected foreign matter is attached;
It is provided on the lower part of the probe, the mother for moving the foreign matter by rotating
foundation;
Is provided in the lower portion of the motor, the position of the attached foreign matter can be confirmed
Position sensor;
Is provided below the position sensor, and includes a cable for transmitting the signal of the transducer and the signal of the position sensor,
The transducer, the electromagnet, the motor and the position sensor have a body
It is made, characterized in that the tubular having an outer diameter smaller than the inner diameter of the tube to be inserted into the tube of the steam generator,
The cable,
Steam generator foreign body moving device, characterized in that for supplying power to the motor.
삭제delete 삭제delete
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101513776B1 (en) * 2012-04-10 2015-04-20 한국수력원자력 주식회사 Foreign removal system for steam generator of nuclear power plant

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2763352C (en) * 2009-05-27 2017-08-22 R. Brooks Associates, Inc. Steam generator upper bundle inspection tools

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101513776B1 (en) * 2012-04-10 2015-04-20 한국수력원자력 주식회사 Foreign removal system for steam generator of nuclear power plant

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