JPS6118478Y2 - - Google Patents

Info

Publication number
JPS6118478Y2
JPS6118478Y2 JP1980115799U JP11579980U JPS6118478Y2 JP S6118478 Y2 JPS6118478 Y2 JP S6118478Y2 JP 1980115799 U JP1980115799 U JP 1980115799U JP 11579980 U JP11579980 U JP 11579980U JP S6118478 Y2 JPS6118478 Y2 JP S6118478Y2
Authority
JP
Japan
Prior art keywords
pipe
tube
valve
guide
pressure vessel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP1980115799U
Other languages
Japanese (ja)
Other versions
JPS5739398U (en
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1980115799U priority Critical patent/JPS6118478Y2/ja
Publication of JPS5739398U publication Critical patent/JPS5739398U/ja
Application granted granted Critical
Publication of JPS6118478Y2 publication Critical patent/JPS6118478Y2/ja
Expired legal-status Critical Current

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Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors

Landscapes

  • Monitoring And Testing Of Nuclear Reactors (AREA)

Description

【考案の詳細な説明】 本考案は、沸騰水型原子炉の定期検査時に使用
される使用済中性子計測管等による計測管の押上
装置に関する。
[Detailed Description of the Invention] The present invention relates to a device for pushing up a measurement tube using a spent neutron measurement tube or the like used during periodic inspection of a boiling water nuclear reactor.

一般に、原子炉(この場合、圧力容器)の炉心
に装荷された計測管は、定期検査時、新旧計測管
の交換を行う。即ち、原子炉の炉心に装荷された
計測管は、圧力容器の上位に設けられた扛上機
に、吊ロープを介して、設けられたハンドリング
ツールで圧力容器の上部格子板から取外して上方
へ引抜いて交換し得るようになつている。
Generally, the measurement tubes loaded in the core of a nuclear reactor (in this case, a pressure vessel) are replaced with new ones during periodic inspections. That is, the measurement tubes loaded in the core of the reactor are removed from the upper grate plate of the pressure vessel using a handling tool installed on a hoisting machine installed above the pressure vessel via a hanging rope, and moved upwards. It can be pulled out and replaced.

しかしながら、上記炉心に長期に亘つて装荷さ
れた旧計測管は、圧力容器の炉心支持板に設けら
れた案内管に嵌装されている関係上、この案内管
の内周と上記計測管の外周との間隙に水あかや塵
埃が附着して固結するため、上記計測管の上部を
ハンドリングツールで把持して引抜こうとして
も、円滑に引抜けないばかりでなく、交換作業に
長時間を費すと共に、被曝するおそれがある。
However, because the old measurement tubes loaded in the core for a long period of time are fitted into guide tubes provided on the core support plate of the pressure vessel, the inner circumference of the guide tube and the outer circumference of the measurement tubes are different from each other. Water scale and dust adhere to and harden in the gap between the tube and the tube, so even if you try to pull it out by grasping the upper part of the measurement tube with a handling tool, it will not only be difficult to pull out smoothly, but it will take a long time to replace the tube. Along with this, there is a risk of exposure.

本考案は、上述した難点を解消するために、圧
力容器の案内管に連設された下部フランジ部に案
内を兼ねた排水管を着脱自在に設け、この排水管
の下部にシリンダー装置を連設し、このシリンダ
ー装置のピストンと一体をなす押上杆を計測管の
下部に当接するようにして設け、上記排水管の一
部に開閉弁を有する排水技管を附設し、これによ
り、計測管を下方から押上げて、ハンドリングツ
ールによる抜引作業を幇助し、新旧計測管の交換
作業に迅速に、しかも円滑に行うようにすると共
に放射化した炉水を、他に漏洩することなく、廃
棄して被曝の低減を図るようにしことを目的とす
る計測管の押上装置を提供するものである。
In order to solve the above-mentioned problems, the present invention has been developed by attaching and detaching a drain pipe that also serves as a guide to the lower flange connected to the guide pipe of the pressure vessel, and connecting a cylinder device to the bottom of this drain pipe. A push-up rod, which is integral with the piston of this cylinder device, is provided so as to come into contact with the lower part of the measuring pipe, and a drainage pipe having an on-off valve is attached to a part of the drain pipe, thereby allowing the measuring pipe to It is pushed up from below to assist in extraction work using a handling tool, allowing for quick and smooth replacement of old and new measurement pipes, and disposing of radioactive reactor water without leaking to others. The present invention provides a device for pushing up a measurement tube, which aims to reduce radiation exposure.

以下、本考案を図示の一実施例について説明す
る。
Hereinafter, the present invention will be described with reference to an illustrated embodiment.

図において、符号1は、炉水を満水にした圧力
容器であつて、この圧力容器1の炉心には炉心支
持構造物2及び上部格子板3が設けられており、
この炉心構造物2及び圧力容器1の底部1aには
案内管4がその底部1aを貫通して垂設されてい
る。又、この案内管4の下部には上部フランジ部
4aが形成されており、この上部フランジ部4a
には弁シート(弁座)5aを有する下部フランジ
部5が取付ボルト6で着脱し得るように設けられ
ており、しかも、この上・下部フランジ部4aと
5との接合部の位置する外周には、可撓部材7が
設けられている。さらに上記上部格子板3と上記
案内管4の弁シート5aとの間に位置する圧力容
器1の炉心には、中性子計測管(以下、たんに計
測管という)8が上方へ抜け出さないようにして
嵌装されており、この計測管8の下端部8aは、
下部フランジ5に装着される密閉ケーシング(図
示されず)によつて収納されている。
In the figure, reference numeral 1 denotes a pressure vessel filled with reactor water, and the core of this pressure vessel 1 is provided with a core support structure 2 and an upper lattice plate 3.
A guide pipe 4 is vertically provided at the bottom 1a of the core structure 2 and the pressure vessel 1, penetrating through the bottom 1a. Further, an upper flange portion 4a is formed at the lower part of this guide tube 4, and this upper flange portion 4a
A lower flange portion 5 having a valve seat (valve seat) 5a is provided so as to be removable with mounting bolts 6, and a lower flange portion 5 having a valve seat 5a is provided on the outer periphery where the joint between the upper and lower flange portions 4a and 5 is located. A flexible member 7 is provided. Further, in the core of the pressure vessel 1 located between the upper grid plate 3 and the valve seat 5a of the guide tube 4, a neutron measurement tube (hereinafter simply referred to as a measurement tube) 8 is provided to prevent it from slipping out upward. The lower end 8a of this measurement tube 8 is
It is housed by a closed casing (not shown) attached to the lower flange 5.

一方、上記密閉ケーシングの装着される上記下
部フランジ部5には案内を兼ねた排水管9の上部
9aが着脱自在に設けられており、この排水管9
の下部9bには例えば水圧によつて作動するシリ
ンダー装置10が、接手11を介して、連設され
ている。又、このシリンダー装置10のシリンダ
ー12の上下部には、圧力流体の各供給口13,
14が設けられており、この各供給口13,14
は、各連結管15,16を介して、切換弁を備え
た駆動制御装置17に連設している。さらに、上
記シリンダー装置10のシリンダー12にはピス
トン18が摺動自在に嵌装されており、このピス
トン18の出力軸をなす押上杆18aは上記計測
管8の下部8aに当接するようにして設けられて
いる。なお、この押上杆18aの上部は凹窩部を
形成しており、上記計測管8の下部8aは上記押
上杆18aの凹窩部に嵌合するようにして当接し
ている。さらに又、上記排水管9の下部に設けら
れた接手11には排水技管19が、短管20を介
して連結されている。この排水技管19の下端開
口部19aには、例えばボール弁のような開閉弁
21が設けられており、この開閉弁21は操作ハ
ンドル21aを回動することにより開閉し得るよ
うになつている。又この開閉弁21の下部には可
撓管22が繋がれており、この可撓管22の一端
部22aはフイルター23を備えたラドピツト2
4へ延設されている。
On the other hand, an upper part 9a of a drain pipe 9 which also serves as a guide is removably provided on the lower flange portion 5 to which the sealed casing is attached.
A cylinder device 10 operated by water pressure, for example, is connected to the lower part 9b of the cylinder via a joint 11. Further, each pressure fluid supply port 13,
14 is provided, and each supply port 13, 14
are connected via respective connecting pipes 15 and 16 to a drive control device 17 equipped with a switching valve. Further, a piston 18 is slidably fitted into the cylinder 12 of the cylinder device 10, and a push rod 18a forming an output shaft of the piston 18 is provided so as to come into contact with the lower part 8a of the measurement tube 8. It is being The upper part of the push-up rod 18a forms a concave portion, and the lower portion 8a of the measuring tube 8 fits into and abuts on the concave portion of the push-up rod 18a. Furthermore, a drainage pipe 19 is connected to a joint 11 provided at the lower part of the drain pipe 9 via a short pipe 20. The lower end opening 19a of this drainage pipe 19 is provided with an on-off valve 21 such as a ball valve, and this on-off valve 21 can be opened and closed by rotating an operating handle 21a. . A flexible tube 22 is connected to the lower part of the on-off valve 21, and one end 22a of the flexible tube 22 is connected to a rad pit 2 equipped with a filter 23.
It has been extended to 4.

従つて、原子炉の定期検査時、計測管8の交換
を行う場合には、予め、下部フランジ部5に装着
された密閉ケーシングを取外して、上記排水管9
を上記下部フランジ部5に装着すると共に、上記
圧力容器1の上位に設けられた扛上機に吊ロープ
を介して設けられたハンドリングツール25で上
記計測管8の鍔部8bを把持して上記上部格子板
3からばね8cの弾力に抗して一旦押下げて離脱
する。
Therefore, when replacing the measuring pipe 8 during a periodic inspection of a nuclear reactor, the sealed casing attached to the lower flange portion 5 must be removed in advance and the drain pipe 9
is attached to the lower flange portion 5, and the flange portion 8b of the measurement tube 8 is gripped by a handling tool 25 provided via a hanging rope to a hoisting machine provided above the pressure vessel 1. It is once pushed down against the elasticity of the spring 8c and removed from the upper lattice plate 3.

なお、上記排水管9を装着するとき、圧力容器
1内の炉水は、上記弁シート5aと上記計測管8
の段部8dとによつてシールされているので妄り
に漏洩するおそれはない。
Note that when the drain pipe 9 is installed, the reactor water in the pressure vessel 1 flows through the valve seat 5a and the measurement pipe 8.
Since it is sealed by the stepped portion 8d, there is no risk of accidental leakage.

次に、駆動制御装置17を作動すると、圧力流
体が供給口13からシリンダー装置10のシリン
ダー12内に流入してピストン18を上方へ押し
上げる。すると、このピストン18の出力軸をな
す押上杆18aが上記計測管8の下部8aを押し
上げる。このようにしてこの計測管8は上記案内
管4内に堆積した水あかや塵埃によつて固着して
いても、上記シリンダー装置10の押上杆18a
によつて押し上げられるので、上記計測管8は上
記ハンドリングツール25との共働作用で上方へ
引抜くことができる。
Next, when the drive control device 17 is actuated, pressure fluid flows into the cylinder 12 of the cylinder device 10 from the supply port 13 and pushes the piston 18 upward. Then, the push-up rod 18a forming the output shaft of the piston 18 pushes up the lower part 8a of the measurement tube 8. In this way, even if the measuring tube 8 is stuck to the guide tube 4 due to water scale or dust, it will not be able to be attached to the push-up rod 18a of the cylinder device 10.
Since the measuring tube 8 is pushed up by the handler 25, the measuring tube 8 can be pulled out in cooperation with the handling tool 25.

なお、上記計測管が引抜かれるとき、圧力容器
1内の炉水は、開閉弁21を開閉することによ
り、上記案内管4、排水管9、短管20、排水技
管19及び可撓管22を通つてラドピツト24へ
流出するようになり、上記管内を洗浄することも
できる。又、一方、上記ピストン18を降下させ
るときは、駆動制御装置17の切換弁を切換える
ことにより、圧力流体が供給口14からシリンダ
ー12の上部キヤビンに流入することによつて行
われる。因に、本発明による排水管9は下部フラ
ンジ部5に着脱自在に装着し得るように説明をし
たがこの排水管9の下部9bと接手11とを着脱
自在に装着し得るように設計変更することは自由
である。
Note that when the measurement pipe is pulled out, the reactor water in the pressure vessel 1 is released into the guide pipe 4, drain pipe 9, short pipe 20, drainage pipe 19, and flexible pipe 22 by opening and closing the on-off valve 21. The water flows out into the rad pit 24 through the pipe, and the inside of the pipe can also be cleaned. On the other hand, when the piston 18 is lowered, the pressure fluid flows into the upper cabin of the cylinder 12 from the supply port 14 by switching the switching valve of the drive control device 17. Incidentally, although the drain pipe 9 according to the present invention has been described as being able to be detachably attached to the lower flange portion 5, the design is changed so that the lower part 9b of the drain pipe 9 and the joint 11 can be detachably attached. That is freedom.

以上述べたように本考案によれば、圧力容器1
の案内管4に連設された下部フランジ部5に案内
を兼ねた排水管9を着脱自在に設け、この排水管
9の下部にシリンダー装置10を連設し、このシ
リンダー装置10のピストンと一体をなす押上杆
18aを上記計測管8の下部8aに当接するよう
にして設け、上記排水管9の一部に開閉弁21を
有する排水技管19を附設してある。したがつ
て、新旧計測管の交換作業が迅速にしかも円滑に
行われるばかりでなく、取扱い操作も簡単であ
り、さらに、作業時の被曝を低減することができ
る。
As described above, according to the present invention, the pressure vessel 1
A drain pipe 9 which also serves as a guide is removably provided in the lower flange portion 5 connected to the guide pipe 4, and a cylinder device 10 is connected to the lower part of this drain pipe 9, and is integrated with the piston of this cylinder device 10. A push rod 18a forming a shape is provided so as to come into contact with the lower part 8a of the measuring pipe 8, and a drainage pipe 19 having an on-off valve 21 is attached to a part of the drain pipe 9. Therefore, not only can the replacement work of the old and new measurement tubes be performed quickly and smoothly, but also the handling operation is simple, and furthermore, the exposure to radiation during the work can be reduced.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本考案による計測管の押上装置の一実施例
を示す断面図である。 1……圧力容器、2……炉心支持板、3……上
部格子板、4……案内管、5……下部フランジ
部、8……計測管、9……排水管、10……シリ
ンダー装置、11…接手、12……シリンダー、
18……ピストン、18a……押上杆、19……
排水技管、21……開閉弁。
The figure is a sectional view showing an embodiment of a measuring tube pushing up device according to the present invention. DESCRIPTION OF SYMBOLS 1... Pressure vessel, 2... Core support plate, 3... Upper grid plate, 4... Guide tube, 5... Lower flange section, 8... Measurement tube, 9... Drain pipe, 10... Cylinder device , 11...Joint, 12...Cylinder,
18...Piston, 18a...Pushing rod, 19...
Drainage pipe, 21...open/close valve.

Claims (1)

【実用新案登録請求の範囲】 1 圧力容器の案内管に連設された下部フランジ
部に案内を兼ねた排水管を着脱自在に設け、こ
の排水管の下部にシリンダー装置を連設し、こ
のシリンダー装置のピストンと一体をなす押上
杆を計測管の下部に当接するようにして設け、
上記排水管の一部に開閉弁を有する排水技管を
附設したことを特徴とする計測管の押上装置。 2 開閉弁をボール弁とし、このボール弁の下部
に可撓管を連設したことを特徴とする実用新案
登録請求の範囲第1項記載の計測管の押上装
置。
[Scope of Claim for Utility Model Registration] 1. A drain pipe that also serves as a guide is removably provided in the lower flange portion connected to the guide pipe of the pressure vessel, a cylinder device is connected to the lower part of the drain pipe, and the cylinder A push-up rod that is integral with the piston of the device is provided so as to come into contact with the lower part of the measurement tube,
A device for pushing up a measuring pipe, characterized in that a drainage pipe having an on-off valve is attached to a part of the drainage pipe. 2. The device for pushing up a measuring tube according to claim 1, wherein the opening/closing valve is a ball valve, and a flexible tube is connected to the lower part of the ball valve.
JP1980115799U 1980-08-15 1980-08-15 Expired JPS6118478Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1980115799U JPS6118478Y2 (en) 1980-08-15 1980-08-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1980115799U JPS6118478Y2 (en) 1980-08-15 1980-08-15

Publications (2)

Publication Number Publication Date
JPS5739398U JPS5739398U (en) 1982-03-03
JPS6118478Y2 true JPS6118478Y2 (en) 1986-06-04

Family

ID=29476701

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1980115799U Expired JPS6118478Y2 (en) 1980-08-15 1980-08-15

Country Status (1)

Country Link
JP (1) JPS6118478Y2 (en)

Also Published As

Publication number Publication date
JPS5739398U (en) 1982-03-03

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