JPH0313892A - Pressureproof plug - Google Patents

Pressureproof plug

Info

Publication number
JPH0313892A
JPH0313892A JP1146663A JP14666389A JPH0313892A JP H0313892 A JPH0313892 A JP H0313892A JP 1146663 A JP1146663 A JP 1146663A JP 14666389 A JP14666389 A JP 14666389A JP H0313892 A JPH0313892 A JP H0313892A
Authority
JP
Japan
Prior art keywords
core monitor
pressure
shaft
seal
monitor housing
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.)
Granted
Application number
JP1146663A
Other languages
Japanese (ja)
Other versions
JPH0797150B2 (en
Inventor
Kazuo Sakamaki
和雄 酒巻
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 by Toshiba Corp filed Critical Toshiba Corp
Priority to JP1146663A priority Critical patent/JPH0797150B2/en
Publication of JPH0313892A publication Critical patent/JPH0313892A/en
Publication of JPH0797150B2 publication Critical patent/JPH0797150B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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

PURPOSE:To allow the pressureproof plug to completely perform seal of reactor water at the time of inspection of the inner face of an in-core monitor housing by detachably mounting a specific pressureproof seal and its guide rod for fitting the inner circumference face of the in-core monitor housing each other. CONSTITUTION:After an in-core monitor 16 housed in an in-core monitor housing 14 is removed, a pressureproof plug 22 is inserted in the housing 14: the plug 22 connectably connects a pressureproof seal 23 and a connecting rod 24 by the use of a ball lock mechanism 34, which is provided on the lower end part of a rod shaft 26 extending to the center part of the seal 23. In addition, a pressureproof packing 27 is mounted on the upper end outer circumference part of the shaft 26 to hold the lower end part of the packing 27 with the use of a collar 32 through a ring to screw it with the shaft 26 so as to move in the axial direction of the shaft 26. Thereby, the packing 27 is deformed by moving the collar 32 upward while it is permitted to fit the inner face of the housing 14.

Description

【発明の詳細な説明】 〔発明の目的〕 〈産業上の利用分野） 本発明は沸騰水型原子炉において中性子計装管（インコ
アモニタ）を収納するインコアモニタハウジングの内面
を点検する際に、インコアモニタハウジング内面上部の
任意の位置をシールし、炉水のリークを防止してインコ
アモニタハウジング内面の点検を可能とする耐圧プラグ
に関する。[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention provides a method for inspecting the inner surface of an in-core monitor housing that houses a neutron instrumentation tube (in-core monitor) in a boiling water nuclear reactor. The present invention relates to a pressure-resistant plug that seals any upper part of the inner surface of an in-core monitor housing, prevents leakage of reactor water, and enables inspection of the inner surface of the in-core monitor housing.

（従来の肢術） 一般に、沸騰水型原子炉においては、運転期間中、炉内
の中性子束を適正な分布状態に保つため、棒状の中性子
計装管、すなわちインコアモニタを燃料集合体の間に装
設して中性子束の分布状態を監視するようにしている。(Conventional Technique) In general, in a boiling water reactor, a rod-shaped neutron instrumentation tube, that is, an in-core monitor, is installed between the fuel assemblies in order to maintain an appropriate distribution of neutron flux within the reactor during operation. The system is equipped with a neutron beam to monitor the distribution of neutron flux.

このインコアモニタはその上端部に設冒したスプリング
の伸長力を利用して、その頭部が炉内の上部格子板の交
差部に係合されるとともに、下部がインコアモニタ案内
管およびインコアモニタハウジング内に挿入される。イ
ンコアモニタの下端部はインコアモニタハウジングの下
端に固定されるインコアモニタ７ランジに形成された受
座にＯリングを介して当接支持される。この受座は鏡面
仕上げとされ、インコアモニタの下端部と密着して炉水
のリークを防止するようにしている。This in-core monitor uses the extension force of a spring installed at its upper end to engage the head part with the intersection of the upper grid plate in the furnace, and the lower part to connect the in-core monitor guide pipe and the in-core monitor housing. inserted within. The lower end of the in-core monitor is abutted and supported via an O-ring on a seat formed on the flange of the in-core monitor 7 fixed to the lower end of the in-core monitor housing. This seat has a mirror finish and is in close contact with the lower end of the in-core monitor to prevent leakage of reactor water.

（発明が解決しようとする課題） ところで、インコアモニタハウジングの内面には酸化物
等が付着するため、定期的に付着酸化物等の浄化のため
の点検を行なっている。インコアモニタハウジング内面
の点検時には原子炉圧力容器内とインコアモニタ案内管
とを一旦遮断し、炉水の排出を防止する必要がある。こ
の場合、従来はインコアモニタ案内管の上部にシール部
材を取り付けて炉水のリークを防止していた。(Problems to be Solved by the Invention) Incidentally, since oxides and the like adhere to the inner surface of the in-core monitor housing, inspections are periodically performed to clean the adhered oxides and the like. When inspecting the inner surface of the in-core monitor housing, it is necessary to temporarily shut off the inside of the reactor pressure vessel and the in-core monitor guide pipe to prevent reactor water from being discharged. In this case, conventionally a sealing member was attached to the upper part of the in-core monitor guide pipe to prevent leakage of reactor water.

しかしながら、炉水を完全にシールすることは困難であ
り、またインコアモニタハウジング内面の任意の位置に
シール部材を装着することができなかった。また、イン
コアモニタハウジング内に圧力を加えることができない
ため、インコアモニタハウジング壁面やその下端部のイ
ンコアモニタ７ランジからのリークの確認を行なうこと
ができなかった。さらに点検作業が長時間に及ぶ場合に
は、作業員が放ａＡ縮被曝を多聞に受けるおそれがあっ
た。However, it is difficult to completely seal the reactor water, and it has not been possible to mount a sealing member at an arbitrary position on the inner surface of the in-core monitor housing. Furthermore, since pressure cannot be applied inside the in-core monitor housing, it has not been possible to check for leaks from the in-core monitor 7 lunge on the wall surface of the in-core monitor housing or the lower end thereof. Furthermore, if inspection work took a long time, there was a risk that workers would be exposed to radiation exposure.

本発明は上記の事情を考慮してなされたもので、インコ
アモニタハウジング内面の点検時において、インコアモ
ニタハウジング内面の任意の位置に自由に装着すること
ができるとともに、炉水を完全にシールことができ、さ
らにインコアモニタハウジング壁やインコアモニタ７ラ
ンジからのリークの確認を安全かつ確実にしかもｎ＊に
行なうことができ、作業員の放射線被曝を防止すること
ができる耐圧プラグを提供することを目的とする。The present invention was made in consideration of the above circumstances, and can be freely installed at any position on the inner surface of the in-core monitor housing during inspection of the inner surface of the in-core monitor housing, and can completely seal reactor water. The purpose of the present invention is to provide a pressure-resistant plug that can safely and reliably check for leaks from the In-Core Monitor housing wall and In-Core Monitor 7 lunge, and prevent workers from being exposed to radiation. shall be.

〔発明の構成〕[Structure of the invention]

（課題を解決するための手段） 本発明は、インコアモニタハウジングの内周面に密着し
てシール可能な耐圧シールと、この耐圧シールをインコ
アモニタハウジング内の任意の位置に案内して装着する
連結棒と、これら耐圧シールおよび連結棒を着脱可能に
連結する連結機構とが備えられ、上記耐圧シールはロッ
ドシャフト周りに耐圧パツキンが装着されるとともに、
そのロッドシャフト周りに回転することにより上記耐圧
パツキンを変形させてインコアモニタハウジング内周面
に密着させるカラーが備えられ、上記連結棒はインコア
モニタ７ランジに固定されるスリーブに２＊シヤフトが
気密かつ摺動可能に保持されるとともに、この２重シャ
フトは外管に内側シャフトが気密かつ摺動可能に保持さ
れてなり、この外管の上端部が上記カラーに連結される
一方、内側シャツ１−の上端部が上記ロッドシャフトに
連結され、上記スリーブにはインコアモニタハウジング
内に圧力水を供給可能な水圧供給口が形成されたもので
ある。(Means for Solving the Problems) The present invention provides a pressure-resistant seal that can be sealed in close contact with the inner peripheral surface of an in-core monitor housing, and a connection that guides and attaches this pressure-resistant seal to an arbitrary position within the in-core monitor housing. A rod, and a connecting mechanism for removably connecting the pressure seal and the connecting rod, the pressure seal is equipped with a pressure seal around the rod shaft, and
A collar is provided that deforms the pressure-resistant packing by rotating around the rod shaft and brings it into close contact with the inner circumferential surface of the Incore monitor housing, and the connecting rod is attached to a sleeve that is fixed to the Incore monitor 7 lange so that the shaft is airtight and The double shaft is slidably held in the outer tube, and the inner shaft is airtightly and slidably held in the outer tube, and the upper end of the outer tube is connected to the collar, while the inner shirt 1- The upper end portion of the in-core monitor housing is connected to the rod shaft, and the sleeve is formed with a water pressure supply port that can supply pressurized water into the in-core monitor housing.

（作用） 耐圧シールを連結棒の先端に連結機構を介して連結し、
スリーブをインコアモニタ７ランジに固定する。そして
、２重シャフトをスリーブに摺動させてインコアモニタ
ハウジング内の上方へ挿入する。挿入により耐圧シール
がインコアモニタハウジング内の所定の位置に達した状
態で、内側シャフトを固定する一方、外管を回転させ、
この外管の上端部に連結されたカラーを回転させる。(Function) Connect the pressure seal to the tip of the connecting rod via the connecting mechanism,
Secure the sleeve to the Incore Monitor 7 langes. The dual shaft is then slid into the sleeve and inserted upward into the in-core monitor housing. Once the pressure seal has reached a predetermined position within the inner monitor housing, rotate the outer tube while fixing the inner shaft.
The collar connected to the upper end of this outer tube is rotated.

カラーが自転すると、耐圧パツキンが変形してインコア
モニタハウジング内周面に密着し、耐圧シールが装着さ
れる。この耐圧シールによりか水のリークを完全に防止
することができるとともに、インコアモニタハウジング
内に圧力を加えた場合でも完全なシールを確保すること
ができる。When the collar rotates, the pressure-resistant packing deforms and comes into close contact with the inner peripheral surface of the in-core monitor housing, and a pressure-resistant seal is attached. This pressure-resistant seal can completely prevent water leakage, and can also ensure a complete seal even when pressure is applied inside the in-core monitor housing.

耐圧シールの装着後、スリーブに形成された水圧供給口
から圧力水を供給することによりインコアモニタハウジ
ング壁あるいはインコアモニタフランジからのリークの
確認を行なうことができる。After the pressure seal is attached, leakage from the in-core monitor housing wall or the in-core monitor flange can be confirmed by supplying pressurized water from the water pressure supply port formed in the sleeve.

また、耐圧シールが装着された状態で連結機構により連
結棒を取り外し、インコアモニタハウジング内面の点検
作業を行なうことができる。したがって、インコアモニ
タハウジングの点検作業を効率的に行なうことができ、
作業員の放射線被曝ｍの低減を図ることができる。Furthermore, with the pressure seal attached, the connecting rod can be removed by the connecting mechanism and the inner surface of the in-core monitor housing can be inspected. Therefore, inspection work on the in-core monitor housing can be carried out efficiently.
It is possible to reduce radiation exposure m of workers.

（実施例） 本発明に係る耐圧プラグの一実流例について添付図面を
参照して説明する。(Example) An example of an actual flow of a pressure-resistant plug according to the present invention will be described with reference to the accompanying drawings.

第６図に示すように、炉心部１０および冷却水を収容し
た原子炉圧力容器１１に一体に設けられた炉心シュラウ
ド１２に、炉心支持板１３が水平に設けられ、この炉心
支持板１３の下方に位置する原子炉圧力容器１１の底部
１１ａにはインコアモニタハウジング１４が貫通固着さ
れる。このインコアモニタハウジング１４の上部にはイ
ンコアモニタ案内管１５が一体に連結され、このインコ
アモニタ案内管１５の、Ｆ端部が炉心支持板１３を貫通
して上部間口部１５ａが形成される。As shown in FIG. 6, a core support plate 13 is provided horizontally on a core shroud 12 that is integrally provided with a reactor core 10 and a reactor pressure vessel 11 containing cooling water. An in-core monitor housing 14 is fixedly fixed to the bottom 11a of the reactor pressure vessel 11 located at the bottom 11a of the reactor pressure vessel 11. An in-core monitor guide tube 15 is integrally connected to the upper part of this in-core monitor housing 14, and the F end of this in-core monitor guide tube 15 penetrates through the core support plate 13 to form an upper opening portion 15a.

インコアモニタ案内管１５の上部開口部１５８にはイン
コアモニタ１６が挿脱自在に嵌挿され、このインコアモ
ニタ１６の上部は上部格子板１７の交差部下側に係合さ
れる。インコアモニタ１６の下端部は、インコアモニタ
ハウジング１４の下端部に固定されたインコアモニタフ
ランジ１８に形成された受座にシール部１９を介して当
接支持される。なお、符号２０は炉心部１０に装荷され
た燃料集合体を示す。The in-core monitor 16 is removably inserted into the upper opening 158 of the in-core monitor guide tube 15, and the upper part of the in-core monitor 16 is engaged with the lower side of the intersection of the upper grid plate 17. The lower end of the in-core monitor 16 is supported in contact with a seat formed on an in-core monitor flange 18 fixed to the lower end of the in-core monitor housing 14 via a seal portion 19 . Note that the reference numeral 20 indicates a fuel assembly loaded in the reactor core 10.

ところで、インコアモニタハウジング１４Ｊ３よびイン
コアモニタ７ランジ１８は、その表面にイζ１着する酸
化物等を浄化するために定期的に点検が行なわれる。本
実施例の耐圧プラグはインコアモニタハウジング１４内
面およびインコアモニタフランジ１８を点検する場合に
、炉水のリークを完全にシールするために使用されるも
のである。Incidentally, the in-core monitor housing 14J3 and the in-core monitor 7 flange 18 are periodically inspected to remove oxides and the like deposited on their surfaces. The pressure plug of this embodiment is used to completely seal reactor water leaks when inspecting the inner surface of the in-core monitor housing 14 and the in-core monitor flange 18.

耐圧プラグは、第１図、第２図および第３図に示すよう
に、インコアモニタハウジング１４に収容されたインコ
アモニタ１６を取り外した後に、インコアモニタフラン
ジ１８の下端部よりインコアモニタハウジング１４内に
挿入される。耐圧プラグ２２にはインコアモニタハウジ
ング１４の内周面に密着してシール可能な耐圧シール２
３と、この耐圧シール２３をインコアモニタハウジング
１４内の任意の位置に案内して装着する連結棒２４とが
備えられる。As shown in FIGS. 1, 2, and 3, the pressure plug is inserted into the in-core monitor housing 14 from the lower end of the in-core monitor flange 18 after removing the in-core monitor 16 housed in the in-core monitor housing 14. inserted. The pressure-resistant plug 22 has a pressure-resistant seal 2 that can tightly seal the inner peripheral surface of the in-core monitor housing 14.
3, and a connecting rod 24 that guides and attaches the pressure seal 23 to an arbitrary position within the in-core monitor housing 14.

耐圧シール２３は、第４図＜Ａ）、（Ｂ）に示すように
、中心部にロッドシャフト２６が延び、その上部外周部
に耐圧パツキン２７が装着される。As shown in FIGS. 4A and 4B, the pressure seal 23 has a rod shaft 26 extending in the center thereof, and a pressure packing 27 attached to the upper outer periphery thereof.

耐圧パツキン２７の周囲には軸方向に均等間隔をおいて
、数箇所に金属製リング２８ａ、２８ｂが装着され、耐
圧パツキン２７のパツキン（ゴム）部材が径方向に膨張
することを抑止している。耐圧パツキン２７の上端部は
Ｏリング２９を介してハウジングカラー３０により支持
される。また、耐圧パツキン２７の下端部はリング３１
を介してカラー３２により保持される。カラー３２はロ
ッドシャフト２６に螺合され、ロッドシャフト２６周り
に回転させることにより、ロッドシャフト２０の軸方向
に移ｖＪするようになっている。そして、ロッドシャフ
ト２６を固定しておき、カラー３２を回転させて上方へ
移動させると、耐圧パツキン２７が第５図に示すように
蛇腹状に変形し、インコアモニタハウジング１４の内周
面に密着してか水を完全にシールするとともに、耐圧シ
ール２３自体がインコアモニタハウジング１４内に装着
される。なお、ロッドシャフト２６の下端部には連結棒
２４と着脱可能に連結するための連結機構としてのボー
ルロック機構３４により連結するための溝部３５および
４角社部３６が形成される。Metal rings 28a and 28b are attached at several locations around the pressure packing 27 at equal intervals in the axial direction to prevent the packing (rubber) member of the pressure packing 27 from expanding in the radial direction. . The upper end of the pressure packing 27 is supported by a housing collar 30 via an O-ring 29. Further, the lower end of the pressure-resistant gasket 27 is connected to a ring 31.
It is retained by the collar 32 through the . The collar 32 is screwed onto the rod shaft 26, and is moved in the axial direction of the rod shaft 20 by rotating around the rod shaft 26. Then, when the rod shaft 26 is fixed and the collar 32 is rotated and moved upward, the pressure-resistant gasket 27 deforms into a bellows shape as shown in FIG. In addition to completely sealing out water, the pressure seal 23 itself is installed within the in-core monitor housing 14. Note that a groove portion 35 and a square corner portion 36 are formed at the lower end of the rod shaft 26 for connection by a ball lock mechanism 34 serving as a connection mechanism for removably connecting to the connecting rod 24.

連結棒２４はインコアモニタフランジ１８に螺合固定さ
れるスリーブ３８が備えられ、このスリーブ３８にＯリ
ング４０を介して気密に、かつ上下方向および周方向に
１習動可能に２重シャフ１へ４１が保持される。２重シ
ャフ］・４１は外管４２内に内側シャフト４４がＯリン
グ４３を介して気密に、かつ上下方向および周方向に摺
動可能に保持される。内側シャフト４４の上端部はボー
ルロック機構３４を介してロッドシャフト２６の下端部
に連結されるとともに、４角柱部３６を介して回転方向
に結合される。また、外管４２の上端部がカラー３２の
下部に嵌合し、回転方向に結合される。また、スリーブ
３８にはインコアモニタハウジング１４内に圧力水を供
給するための水圧供給口４５が設けられる。The connecting rod 24 is provided with a sleeve 38 that is screwed and fixed to the in-core monitor flange 18, and the sleeve 38 is connected to the double shaft 1 through an O-ring 40 airtightly and movably in the vertical and circumferential directions. 41 is retained. The double shaft 41 has an inner shaft 44 held in an outer tube 42 through an O-ring 43 in an airtight manner and slidable in the vertical and circumferential directions. The upper end of the inner shaft 44 is connected to the lower end of the rod shaft 26 via the ball lock mechanism 34, and is also coupled in the rotational direction via the square column 36. Further, the upper end of the outer tube 42 fits into the lower part of the collar 32 and is coupled in the rotation direction. Further, the sleeve 38 is provided with a water pressure supply port 45 for supplying pressurized water into the in-core monitor housing 14.

次に上記実施例の作用について説明する。Next, the operation of the above embodiment will be explained.

耐圧プラグ２２はインコアモニタハウジング１４に収容
されたインコアモニタ１６を取り外した後に、インコア
モニタハウジング１４の内面を点検するために炉水をシ
ールする目的で使用されるもので、インコアモニタフラ
ンジ１８の下端部からインコアモニタハウジング１４内
に装着される。The pressure plug 22 is used for the purpose of sealing reactor water in order to inspect the inner surface of the in-core monitor housing 14 after removing the in-core monitor 16 housed in the in-core monitor housing 14, and is located at the lower end of the in-core monitor flange 18. It is installed into the in-core monitor housing 14 from the inside.

まず、スリーブ３８をインコアモニタ７ランジ１８に螺
合固定し、２重シャフト４１をスリーブ３８に対して摺
動させてインコアモニタハウジング１４の上部へ移動さ
せる。そして、耐圧シール２３がインコアモニタハウジ
ング１４内の所定の位置に到達したところで、内側シャ
フト４４を固定するとともに、外管４２を回転させ、カ
ラー３２を上昇させることにより耐圧シール２３を装着
する。この耐圧シール２３により炉水のリークを完全に
防止することができる。First, the sleeve 38 is screwed and fixed to the flange 18 of the in-core monitor 7, and the double shaft 41 is slid against the sleeve 38 and moved to the upper part of the in-core monitor housing 14. Then, when the pressure seal 23 reaches a predetermined position within the in-core monitor housing 14, the inner shaft 44 is fixed, the outer tube 42 is rotated, and the collar 32 is raised to mount the pressure seal 23. This pressure seal 23 can completely prevent leakage of reactor water.

耐圧シール２３の装着後、水圧供給口４５から圧力水を
供給し、インコアモニタハウジング１４の壁あるいはイ
ンコアモニタ７ランジ１８からのリークを確認すること
ができる。また、耐圧シール２３の装着後にボールロッ
ク機構３４により連結棒２４の連結を外し、インコアモ
ニタハウジング１４内面の点検を行なうことができる。After the pressure seal 23 is attached, pressure water is supplied from the water pressure supply port 45 to check for leaks from the wall of the in-core monitor housing 14 or the flange 18 of the in-core monitor 7. Further, after the pressure seal 23 is attached, the connecting rod 24 is disconnected by the ball lock mechanism 34, and the inner surface of the in-core monitor housing 14 can be inspected.

このように上記実施例によれば、インコアモニタハウジ
ング１４内面の点検時において、インコアモニタハウジ
ング１４内面の任意の位置に自在に装着することができ
るとともに、炉水を完全にシールすることができ、さら
にインコアモニタハウジング１４の壁面およびインコア
モニタ７ランジからのリークの確認を安全かつ確実にし
かも簡単に行なうことができ、作業員のｔｌｉ射線被１
１１…の低減を図ることができる。As described above, according to the above embodiment, when inspecting the inner surface of the in-core monitor housing 14, the in-core monitor housing 14 can be freely attached to any position on the inner surface of the in-core monitor housing 14, and the reactor water can be completely sealed. Furthermore, leaks from the wall of the in-core monitor housing 14 and the lung of the in-core monitor 7 can be checked safely, reliably, and easily, and workers are exposed to tli radiation.
11... can be reduced.

（発明の効果） 本発明は、インコアモニタハウジングの内周面に密着し
てシール可能な耐圧シールと、この耐圧シールをインコ
アモニタハウジング内の任意の位置に案内して装着する
連結棒と、これら耐圧シールおよび連結棒を着脱可能に
連結する連結機構とが備えられたから、インコアモニタ
ハウジング内面の点検時において、インコアモニタハウ
ジング内面の任意の位置に自由に装着することができ、
炉水を完全にシールすることができ、さらにインコアモ
ニタハウジング壁およびインコアモニタ７ランジからの
リークのＷ１認を安全かつ確実にしかもＰＪｏｌに行な
うことができるとともに１作業員の放射線波＠最の低減
を図ることができる。(Effects of the Invention) The present invention provides a pressure-resistant seal that can be sealed in close contact with the inner circumferential surface of an in-core monitor housing, a connecting rod that guides and attaches this pressure-resistant seal to an arbitrary position within the in-core monitor housing, and Since it is equipped with a pressure-resistant seal and a connection mechanism that removably connects the connecting rod, it can be freely attached to any position on the inner surface of the In-Core monitor housing when inspecting the inner surface of the In-Core monitor housing.
Reactor water can be completely sealed, and leaks from the Incore monitor housing wall and Incore monitor 7 lunge can be confirmed safely and reliably to PJol, and the radiation waves per worker can be reduced to the maximum. can be achieved.

１４・・・インコアモニタハウジング、１５・・・イン
コアモニタ案内管、１５ａ・・・上部開口部、１６・・
・インコアモニタ、１８・・・インコアモニタフランジ
、２２・・・耐圧プラグ、２３・・・耐圧シール、２４
・・・連結棒、２６・・・０ツドシヤフト、２７・・・
耐圧パツキン、３２・・・カラー、３４・・・ボールロ
ック機構、３８・・・スリーブ、４１・・・２重シャフ
ト、４２・・・外管、４４・・・内側シャフト、４５・
・・水圧供給口。14... In-core monitor housing, 15... In-core monitor guide tube, 15a... Upper opening, 16...
・In-core monitor, 18... In-core monitor flange, 22... Pressure-resistant plug, 23... Pressure-resistant seal, 24
...Connecting rod, 26...0 shaft, 27...
Pressure-resistant packing, 32...Collar, 34...Ball lock mechanism, 38...Sleeve, 41...Double shaft, 42...Outer tube, 44...Inner shaft, 45...
...Water pressure supply port.

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

第１因は本発明に係る耐圧プラグの一実施例を示す構成
図、第２図は第１図における■−■線断面図、第３図は
第１図におけるｌｆｆ−１線断面図、第４図（Ａ）、（
Ｂ）は上記実施例における耐圧シールを示す構成図、第
５図は上記実施例において耐圧シールがインコアモニタ
ハウジング内に装着された状態を示す図、第６図は原子
炉内に中性子計装管が装設された状態を示す断面図であ
る。The first factor is a configuration diagram showing an embodiment of the voltage-resistant plug according to the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, FIG. Figure 4 (A), (
B) is a configuration diagram showing the pressure seal in the above embodiment, Figure 5 is a diagram showing the pressure seal installed in the in-core monitor housing in the above embodiment, and Figure 6 is a diagram showing the neutron instrumentation tube inside the reactor. FIG. 3 is a cross-sectional view showing a state in which the

Claims (1)

【特許請求の範囲】[Claims] インコアモニタハウジングの内周面に密着してシール可
能な耐圧シールと、この耐圧シールをインコアモニタハ
ウジング内の任意の位置に案内して装着する連結棒と、
これら耐圧シールおよび連結棒を着脱可能に連結する連
結機構とが備えられ、上記耐圧シールはロッドシャフト
周りに耐圧パッキンが装着されるとともに、そのロッド
シャフト周りに回転することにより上記耐圧パッキンを
変形させてインコアモニタハウジング内周面に密着させ
るカラーが備えられ、上記連結棒はインコアモニタフラ
ンジに固定されるスリーブに２重シャフトが気密かつ摺
動可能に保持されるとともに、この２重シャフトは外管
に内側シャフトが気密かつ摺動可能に保持されてなり、
この外管の上端部が上記カラーに連結される一方、内側
シャフトの上端部が上記ロッドシャフトに連結され、上
記スリーブにはインコアモニタハウジング内に圧力水を
供給可能な水圧供給口が形成されたことを特徴とする耐
圧プラグ。a pressure-resistant seal that can be tightly sealed to the inner peripheral surface of the in-core monitor housing; a connecting rod that guides and attaches the pressure-resistant seal to an arbitrary position within the in-core monitor housing;
A connection mechanism is provided that removably connects the pressure seal and the connecting rod, and the pressure seal has a pressure packing attached around the rod shaft, and deforms the pressure packing by rotating around the rod shaft. The connecting rod is provided with a collar that is brought into close contact with the inner circumferential surface of the in-core monitor housing, and the double shaft is held in a sleeve that is fixed to the in-core monitor flange in an airtight and slidable manner, and this double shaft is attached to the outer tube. The inner shaft is held airtight and slidable,
The upper end of the outer tube is connected to the collar, while the upper end of the inner shaft is connected to the rod shaft, and the sleeve is formed with a water pressure supply port that can supply pressurized water into the in-core monitor housing. A pressure-resistant plug characterized by:
JP1146663A 1989-06-12 1989-06-12 Pressure plug Expired - Lifetime JPH0797150B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1146663A JPH0797150B2 (en) 1989-06-12 1989-06-12 Pressure plug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1146663A JPH0797150B2 (en) 1989-06-12 1989-06-12 Pressure plug

Publications (2)

Publication Number Publication Date
JPH0313892A true JPH0313892A (en) 1991-01-22
JPH0797150B2 JPH0797150B2 (en) 1995-10-18

Family

ID=15412808

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1146663A Expired - Lifetime JPH0797150B2 (en) 1989-06-12 1989-06-12 Pressure plug

Country Status (1)

Country Link
JP (1) JPH0797150B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008092696A (en) * 2006-10-03 2008-04-17 Toyota Motor Corp Electric vehicle and vehicle charging system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008092696A (en) * 2006-10-03 2008-04-17 Toyota Motor Corp Electric vehicle and vehicle charging system
JP4715708B2 (en) * 2006-10-03 2011-07-06 トヨタ自動車株式会社 Electric vehicle and vehicle charging system

Also Published As

Publication number Publication date
JPH0797150B2 (en) 1995-10-18

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