JP4427422B2 - Repair method and repair device for nuclear vessel penetration nozzle - Google Patents

Repair method and repair device for nuclear vessel penetration nozzle Download PDF

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JP4427422B2
JP4427422B2 JP2004270896A JP2004270896A JP4427422B2 JP 4427422 B2 JP4427422 B2 JP 4427422B2 JP 2004270896 A JP2004270896 A JP 2004270896A JP 2004270896 A JP2004270896 A JP 2004270896A JP 4427422 B2 JP4427422 B2 JP 4427422B2
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良継 神木
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Mitsubishi Heavy Industries Ltd
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    • 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
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Description

本発明は、原子力圧力容器の下部鏡などに設けられている貫通管台の補修方法および補修装置に関するものである。   The present invention relates to a repair method and a repair device for a through-pipe base provided in a lower mirror of a nuclear pressure vessel.

原子炉圧力容器下部鏡の貫通管台の内面を補修する場合には、遠隔操作により貫通管台の内面を切削し、補修要箇所を除去する必要があるが、従来は、補修要箇所の発生を防止するため、当該貫通管台の内面を遠隔操作により、ピーニングする等の予防保全対策が実施されており、当該貫通管台の内面を切削する事例については報告されていない。これまで、原子力容器上蓋管台におけるサーマルスリーブに検査用の穴を明けるための装置（特許文献１参照方）や、原子炉圧力容器蓋の管台検査装置（特許文献２参照方）については提案されていたが、原子力圧力容器の貫通管台の内面の補修方法や補修装置については提案されているものはなかった。   When repairing the inner surface of the through-pipe nozzle of the reactor pressure vessel lower mirror, it is necessary to cut the inner surface of the through-pipe nozzle by remote operation and remove the repair-required point. In order to prevent this, preventive maintenance measures such as peening the inner surface of the through nozzle pedestal by remote control have been implemented, and no examples of cutting the inner surface of the through nozzle pedestal have been reported. So far, we have proposed a device for drilling inspection holes in the thermal sleeve of the nuclear vessel top cover nozzle (see Patent Document 1) and a reactor pressure vessel lid nozzle inspection device (see Patent Document 2). However, there has been no proposal for a repair method or a repair device for the inner surface of the through-hole nozzle of the nuclear pressure vessel.

特許第２９８４５５０号公報（図１）Japanese Patent No. 2984550 (FIG. 1) 特許第３０２１１５３号公報（図１）Japanese Patent No. 3021153 (FIG. 1)

本発明は、原子力容器に設けられている貫通管台の補修を、補修時に発生する切削切粉を原子炉容器内に飛散させることなく補修する方法、および、水中条件下、遠隔操作により確実に、かつ、切削切粉を飛散させることなく、切削加工により補修する装置を提案することを目的とする。   The present invention provides a method for repairing a through nozzle provided in a nuclear vessel without causing the cutting chips generated during the repair to scatter in the reactor vessel, and reliably underwater conditions by remote operation. And it aims at proposing the apparatus repaired by cutting, without scattering cutting chips.

本発明は上記課題を解決するために、以下の（１）〜（７）の手段を採用する。   The present invention employs the following means (1) to (7) in order to solve the above problems.

（１）第１の手段に係る原子力容器貫通管台の補修方法は、原子炉容器に設けられている貫通管台の一端部を止栓し、次に、貫通管台の他端側より貫通管台の内面を切削加工し、次に、切削により発生した切削切粉を系外に除去した後、前記止栓を取り外すことを特徴とするものである。なお、前記切削切粉の除去は、循環水流に切削切粉を同伴させることや抽気により行えばよい。   (1) The method of repairing the nuclear vessel penetration nozzle according to the first means is to plug one end of the penetration nozzle provided in the reactor vessel, and then penetrate from the other end of the penetration nozzle. The inner surface of the nozzle is cut, and then the cutting chips generated by the cutting are removed from the system, and then the stopper is removed. The cutting chips may be removed by bringing cutting chips into the circulating water flow or by extracting air.

（２）第２の手段に係る原子力容器貫通管台の補修方法は、原子炉容器に設けられている貫通管台の一端部を止栓し、次に、貫通管台の他端部に切削切粉収納空間を有するドリル装置を取り付けて貫通管台の内面を切削加工し、次に、切削により発生した切粉を、前記ドリル装置を介して系外に除去した後、前記止栓を取り外すことを特徴とするものである。
なお、前記ドリル装置による切削は、汎用のドリルやバイトなどの切削工具を駆動する装置を用いればよい。 (2) The method of repairing the nuclear vessel penetration nozzle according to the second means is to plug one end of the penetration nozzle provided in the reactor vessel and then cut to the other end of the penetration nozzle. by cutting through pipe base of the inner surface by attaching a drilling apparatus that have a chip receiving space, then, after the chips generated by the cutting was removed out of the system through the drilling device, the stopcock It is characterized by removing.
In addition, the cutting with the said drill apparatus should just use the apparatus which drives cutting tools, such as a general purpose drill and a cutting tool.

（３）第３の手段に係る原子力容器貫通管台の補修方法は、前記（１）または（２）に記載する原子力容器貫通管台の補修方法において、前記切削切粉の除去を、水を供給することで、同水と共に前記切削切粉を系外に除去することを特徴とするものである。   (3) A method for repairing a nuclear vessel penetration nozzle according to a third means is the method for repairing a nuclear vessel penetration nozzle according to (1) or (2), wherein the cutting chips are removed by water. By supplying, the cutting chips together with the water are removed from the system.

（４）第４の手段に係る原子力容器貫通管台の補修方法は、前記（１）ないし（３）の何れかに記載する原子力容器貫通管台の補修方法において、前記切削切粉の除去時または除去前に、前記貫通管台内に圧力水を吐出することを特徴とするものである。   (4) A method of repairing a nuclear vessel penetration nozzle according to a fourth means is the method of repairing a nuclear vessel penetration nozzle according to any one of (1) to (3), wherein the cutting chips are removed. Alternatively, before removal, pressure water is discharged into the through-pipe base.

（５）第５の手段に係る原子力容器貫通管台の補修装置は、原子炉容器に設けられている貫通管台の軸方向に沿って支持され、切削切粉収納空間を有するドリル装置と、同ドリル装置の先端部に設けられ貫通管台への固定および解除機能を有する固定機構と、同固定機構の固定を強制解除する固定解除機構と、前記ドリル装置に設けられ前記貫通管台の内面を切削する切削工具を駆動する切削工具回転機構と、前記切削工具を前記ドリル装置の軸方向に移動させる切削工具送り機構と、前記切削工具を前記ドリル装置内に収納する切削工具引抜き機構と、貫通管台内に圧力水を注入するブロー機構と、前記ドリル装置内の切削切粉を系外に除去する切粉回収機構とを具えたことを特徴とするものである。 (5) nuclear vessel through pipe base repair apparatus according to the fifth means is supported along the axial direction of the through pipe base provided in the reactor vessel, drilling apparatus that have a cutting chips receiving space A fixing mechanism that is provided at the tip of the drill device and has a function of fixing and releasing to the through nozzle, a fixing release mechanism that forcibly releases the fixing mechanism, and the through nozzle provided in the drill device A cutting tool rotation mechanism for driving a cutting tool for cutting the inner surface of the cutting tool, a cutting tool feed mechanism for moving the cutting tool in the axial direction of the drill device, and a cutting tool pulling mechanism for storing the cutting tool in the drill device And a blow mechanism for injecting pressure water into the through pipe pedestal, and a chip collection mechanism for removing cutting chips in the drill device out of the system.

なお、前記固定機構は作動流体圧やモータ駆動による汎用のチャック式把持機構などでよい。また、固定解除機構の固定解除は、固定機構による解除と同機能であり、所謂、二重安全機構であり、作動系統がそれぞれ独立しているものが、確実な作動を確保するために好ましい。また、切削工具送り機構に対し、切削工具引抜き機構が、ドリル装置内への切削工具の収納移動を確実ならしめるために、二重安全機構として設けてある。また、前記切削工具は貫通管台内で軸回転することで、その内面を切削するものでよく、汎用のドリルやバイトでよい。   The fixing mechanism may be a general-purpose chuck-type gripping mechanism driven by a working fluid pressure or a motor. Further, the unlocking of the unlocking mechanism has the same function as the unlocking by the fixing mechanism, and is a so-called double safety mechanism, in which the operating systems are independent from each other, in order to ensure reliable operation. In addition, a cutting tool pulling mechanism is provided as a double safety mechanism for the cutting tool feed mechanism in order to ensure the storage movement of the cutting tool into the drill device. Further, the cutting tool may be one that cuts the inner surface by rotating the shaft within the through-pipe base, and may be a general-purpose drill or bite.

（６）第６の手段に係る原子力容器貫通管台の補修装置は、前記（５）に記載する原子力容器貫通管台の補修装置において、前記ドリル装置の先端部外周に、貫通管台を確認する照明付カメラを設けたことを特徴とするものである。   (6) A nuclear vessel penetration nozzle repair device according to a sixth means is the nuclear vessel penetration nozzle repair device according to (5), wherein the through nozzle is confirmed on the outer periphery of the tip of the drill device. It is characterized by providing a camera with illumination.

（７）第７の手段に係る原子力容器貫通管台の補修装置は、前記（５）または（６）に記載する原子力容器貫通管台の補修装置において、前記ドリル装置に前記切削工具清掃のための流体吐出ノズルを設けたことを特徴とするものである。   (7) A nuclear vessel penetrating nozzle repair device according to a seventh means is the nuclear vessel penetrating nozzle repair device according to (5) or (6), wherein the drill device is used for cleaning the cutting tool. This fluid discharge nozzle is provided.

第１の手段に記載の原子力容器貫通管台の補修方法によれば、貫通管台の一端部を止栓しているので、補修時に発生する切削切粉は、貫通管台内に留まり飛散せずに系外に排出されるので、原子炉容器の貫通管台配管系内への切削切粉の混入飛散が発生せずして補修が行える。 According to nuclear vessel through pipe base repair method according to the first hand stage, since the stopcock one end of the through pipe base, cutting chips generated during repair, scattered remains in the through pipe base in Since it is discharged out of the system without repairing, it can be repaired without causing scattering of cutting chips into the through pipe piping system of the reactor vessel.

第２の手段に記載の原子力容器貫通管台の補修方法によれば、貫通管台の補修時に発生する切削切粉は、ドリル装置の切削切粉収納空間内および貫通管台内に留まり、その後、系外に排出されるので、補修時における原子炉容器の貫通管台配管系への切削切粉の混入飛散が完全に防止できる。 According to nuclear vessel through pipe base repair method according to the second hand stage, cutting chips generated during penetration tube stand repair remains in the cutting chips containing space and through pipe base in the drill unit, After that, since it is discharged out of the system, mixing of cutting chips into the through-pipe piping system of the reactor vessel at the time of repair can be completely prevented.

第３の手段に記載の原子炉容器貫通管台の補修方法によれば、前記第１の手段または第２の手段の作用効果を有すると共に、補修時に発生する切削切粉や貫通管台内の異物などが供給水流に伴って系外に排出できる。 According to the third reactor vessel through pipe base repair method according to the hand stage, the which has the effect of the first means or the second means, for generating during the repair cutting chips and the through pipe base in Foreign matter can be discharged out of the system along with the supply water flow.

第４の手段に記載の原子炉容器貫通管台の補修方法によれば、前記第１の手段ないし第３の手段の作用効果を有すると共に、狭隘な貫通管台内に存在する切削切粉を水流により確実に除去することができる。 According to the reactor vessel through pipe base repair method according to the fourth hand stage, which has the effect of the third means to free said first means, the cutting chips existing in the narrow through-pipe base in Can be reliably removed by water flow.

第５の手段に記載の原子力容器貫通管台の補修装置によれば、貫通管台補修時に発生する貫通管台内の切削切粉が、ブロー機構を作動させることによりドリル装置の切削切粉収納空間内に収納でき、更に、切削切粉は切粉回収機構により系外に排出できるので、貫通管台の補修が切削切粉の飛散を発生させることなく行い得る。また、万一、固定機構に動作不良などが発生し、貫通管台に固定状態にあるドリル装置の固定解除が行われない不具合が生じた場合においても、二重安全機構である固定解除機構を具えているので、固定解除対応が可能となり、事故発生が確実に防げる。また、万一、切削工具引抜き機構に動作不良などが発生し、貫通管台内の切削工具の引抜きが行われない不具合が生じた場合においても、切削工具引抜き機構により、切削工具をドリル装置内に収納することができるので、事故発生が確実に防げる。 According to nuclear vessel through pipe base repair apparatus according to a fifth hand stage, cutting chips of the drilling machine by cutting chips in the through pipe base generated during penetration tube repairing actuates the blow mechanism Since the cutting chips can be stored in the storage space, and the cutting chips can be discharged out of the system by the chip collecting mechanism, the through nozzle can be repaired without causing the cutting chips to be scattered. Also, in the unlikely event that malfunction occurs in the fixing mechanism, and there is a problem that the drilling device that is fixed to the through-pipe base cannot be unlocked, the unlocking mechanism that is a double safety mechanism is installed. Because it is equipped, it can be fixed and can prevent accidents. Also, in the unlikely event that the cutting tool pulling mechanism malfunctions and the cutting tool in the penetrating nozzle cannot be pulled out, the cutting tool pulling mechanism causes the cutting tool to move into the drilling device. Accidents can be prevented reliably.

第６の手段段に記載の原子炉容器貫通管台の補修装置によれば、前記第５の手段の作用効果を有すると共に、作業者が照明付カメラの撮像画像を確認しながら、ドリル装置の貫通管台への設置およびその解除を安全確実に行える効果がある。 According to the reactor vessel through-pipe repair device described in the sixth means stage, while having the operational effect of the fifth means , the operator confirms the captured image of the illuminated camera, There is an effect that can be safely and reliably installed on the through nozzle and its release.

第７の手段段に記載の原子炉容器貫通管台の補修装置によれば、前記第５の手段または第６の手段の作用効果を有すると共に、切削工具が常に清掃された状態を維持できるので、多数の貫通管台を連続して施工品質を維持しながら補修し得る効果がある。 According to the reactor vessel penetration nozzle repair device described in the seventh means stage , the cutting tool can be maintained in a constantly cleaned state while having the effects of the fifth means or the sixth means . There is an effect that a large number of through nozzles can be repaired continuously while maintaining the construction quality.

本発明に係る原子炉容器貫通管台の補修方法および補修装置を、図１ないし図８に基づき説明する。図１の（ａ）〜（ｄ）は原子炉容器貫通管台の補修方法を説明するもので、（ａ）は貫通管台の正面図、（ｂ）はドリル装置設置時の正面図、（ｃ）は（ｂ）のア−ア矢視に沿う貫通管台内清掃時での説明図、（ｄ）は貫通管台補修後の正面図である。図２はドリル装置の内部構造を示す正面図、図３はドリル装置の内部構造を示す側面図である。図４の（ａ）は図２のＡ部分の拡大図、（ｂ）は（ａ）のｂ部分の拡大図、（ｃ）は（ｂ）のＣ−Ｃ矢視に沿う正面図、図５は図２のＢ部分の拡大図である。図６は図５のＣ−Ｃ矢視に沿う平面図である。図７はドリル装置の固定解除機構を示す正面図、図８はドリル装置の固定解除機構を示す平面図である。   A method and apparatus for repairing a reactor vessel penetration nozzle according to the present invention will be described with reference to FIGS. (A)-(d) of FIG. 1 explains the repair method of a reactor vessel penetration nozzle, (a) is a front view of the penetration nozzle, (b) is a front view when the drill device is installed, ( (c) is explanatory drawing at the time of the cleaning in a through-pipe stand along the arrow A of (b), (d) is a front view after a through-pipe stand repair. FIG. 2 is a front view showing the internal structure of the drill device, and FIG. 3 is a side view showing the internal structure of the drill device. 4 (a) is an enlarged view of portion A in FIG. 2, (b) is an enlarged view of portion b in (a), (c) is a front view taken along the CC arrow of (b), FIG. FIG. 3 is an enlarged view of a portion B in FIG. 2. 6 is a plan view taken along the line CC in FIG. FIG. 7 is a front view showing a fixing release mechanism of the drill device, and FIG. 8 is a plan view showing the fixing release mechanism of the drill device.

図１（ａ）〜（ｄ）において、原子炉容器の貫通管台の補修方法を説明する。
まず、図１（ａ）に示すように、原子炉容器の下部鏡１に貫通して立設されている複数の貫通管台２の下端を止栓３により塞ぐ。
次に、ドリル装置（補修装置）４を原子炉建屋内のクレーン（図示せず）により吊り下げ、所定の貫通管台まで搬送し、図１の（ｂ）に示すように、貫通管台２の上端部にドリル装置４を、固定機構６により取り付け固定する。
次に、ドリル装置４のドリル回転モータ５ａを駆動して、ドリル５をａ矢印方向に回転させると共に、ドリル送りモータ５ｂを駆動して、ドリル５をｂ矢印の下方方向に移動させ、貫通管台２の内面をドリル５により止栓３の手前まで切削加工する。 1 (a) to 1 (d), a method for repairing the through nozzle of the reactor vessel will be described.
First, as shown in FIG. 1 (a), the lower ends of a plurality of through nozzles 2 that are erected through the lower mirror 1 of the reactor vessel are closed with stoppers 3.
Next, the drill device (repair device) 4 is suspended by a crane (not shown) in the reactor building and transported to a predetermined through nozzle, and as shown in FIG. The drilling device 4 is attached and fixed to the upper end of the fixing device 6 by a fixing mechanism 6.
Next, the drill rotation motor 5a of the drill device 4 is driven to rotate the drill 5 in the direction of the arrow a, and the drill feed motor 5b is driven to move the drill 5 in the downward direction of the arrow b, thereby penetrating the pipe. The inner surface of the table 2 is cut with a drill 5 to the front of the stopcock 3.

次に、ドリル５をドリル装置４内に収納した後、図１（ｃ）に示すブローノズル８を回転させて（ｄ矢印の左方向）、ブローノズル８の先端を貫通管台２に臨ませ、ブローノズル８より圧力水流を吐出し、貫通管台２内の切削切粉を、ドリル装置４の切削切粉収納空間４ａ内に排出する。排出された切削切粉は、ドリル水洗ノズル９ａなどより切削切粉収納空間４ａ内に供給される水流により、切粉回収管９ｂから系外（Ｃ矢印方向）へ排出除去される。上記（ｃ）工程での貫通管台２内への圧力水の吐出と、切削切粉収納空間４ａへの水の供給、排出とを、交互に数度繰り返せば、切粉の排出がより完全に行われる。   Next, after the drill 5 is stored in the drill device 4, the blow nozzle 8 shown in FIG. 1C is rotated (left direction of the arrow d) so that the tip of the blow nozzle 8 faces the penetrating nozzle 2. The pressure water flow is discharged from the blow nozzle 8, and the cutting chips in the through nozzle 2 are discharged into the cutting chip storage space 4 a of the drill device 4. The discharged cutting chips are discharged and removed out of the system (in the direction of arrow C) from the chip collection pipe 9b by the water flow supplied into the cutting chip storage space 4a from the drill washing nozzle 9a or the like. If the discharge of pressure water into the through-pipe nozzle 2 in the step (c) and the supply and discharge of water to the cutting chip storage space 4a are repeated several times alternately, the discharge of chips is more complete. To be done.

次に、図１（ｄ）に示すように、補修が完了した貫通管台２ａの止栓を取り外すことにより貫通管台２ａの補修が完了する。なお、実機においては、念の為、全ての貫通管台２の補修が完了した後に、止栓３を取り外すのが好ましい。   Next, as shown in FIG.1 (d), the repair of the through-pipe stand 2a is completed by removing the stopper of the through-pipe stand 2a which has been repaired. In an actual machine, it is preferable to remove the stopper 3 after all the through nozzles 2 have been repaired.

なお、上記ブローノズル８による貫通管台２内への圧力水流の吐出は、切削切粉の系外への水流除去時と同時に行っても良い。また、切削切粉収納空間４ａから系外への水流は、その下流側に設ける吸込みポンプ又は上流側に設ける吐出ポンプにより発生させればよい。
また、図１（ｂ）において、７はドリル５の支持筒、７ａは支持筒７側に固定されていて、ドリル送りモータ５ｂの回転により上下移動するラック歯を示す。 Note that the discharge of the pressure water flow into the through nozzle 2 by the blow nozzle 8 may be performed simultaneously with the removal of the water flow from the cutting chips to the outside of the system. The water flow from the cutting chip storage space 4a to the outside of the system may be generated by a suction pump provided on the downstream side or a discharge pump provided on the upstream side.
In FIG. 1B, reference numeral 7 denotes a support cylinder of the drill 5, and 7a denotes a rack tooth that is fixed to the support cylinder 7 side and moves up and down by the rotation of the drill feed motor 5b.

前記の補修方法によれば、原子力容器に設けられている貫通管台の補修を、補修時に発生する切削切粉を原子炉容器内に飛散させることなく補修することができる。   According to the repair method described above, the repair of the through nozzle provided in the nuclear vessel can be repaired without scattering the cutting chips generated at the time of repair in the reactor vessel.

図２ないし図８に基づき、本実施例に係る原子炉容器貫通管台の補修装置を説明する。   Based on FIG. 2 thru | or FIG. 8, the repair apparatus of the reactor vessel penetration nozzle stage which concerns on a present Example is demonstrated.

本補修装置は、図２および図３に示すように、内部に切削切粉収納空間４ａを有す全体として筒状のドリル装置４であり、その先端部に設けられている固定機構１０により、原子炉容器の下部鏡１に立設されている貫通管台２の上端に支持固定可能となっている。
ドリル装置４内には、その先端部から出没することで、貫通管台２の内面を切削する切削工具であるドリル５１を備えている。更に、貫通管台２への固定および解除機能を有する固定機構１０と、固定機構１０の固定を強制解除する非常時固定解除機構３０と、ドリル５１を駆動するドリル回転機構５０と、ドリル５１をドリル装置４の軸方向に移動させるドリル送り機構７０と、ドリル５１をドリル装置４内に収納する非常時ドリル引抜き機構９０と、貫通管台２内に圧力水を吐出する貫通管台内面ブロー機構１２０と、ドリル装置４内の切削切粉を系外に除去する切粉回収機構１６０とを備えている。 As shown in FIGS. 2 and 3, the repair device is a cylindrical drill device 4 having a cutting chip storage space 4 a inside, and a fixing mechanism 10 provided at the tip of the drill device 4. It can be supported and fixed to the upper end of the through nozzle 2 that is erected on the lower mirror 1 of the reactor vessel.
The drill device 4 includes a drill 51 that is a cutting tool that cuts the inner surface of the through-pipe base 2 by appearing and disappearing from the tip portion thereof. Further, a fixing mechanism 10 having a function of fixing to and releasing from the through nozzle 2, an emergency fixing release mechanism 30 for forcibly releasing the fixing mechanism 10, a drill rotating mechanism 50 for driving the drill 51, and the drill 51 are provided. A drill feed mechanism 70 that moves in the axial direction of the drill device 4, an emergency drill pull-out mechanism 90 that houses the drill 51 in the drill device 4, and a through-tube base inner surface blow mechanism that discharges pressure water into the through-tube base 2 120 and a chip recovery mechanism 160 that removes cutting chips in the drill device 4 from the system.

特に、本補修装置は、前記非常時固定解除機構３０と、非常時ドリル引抜き機構９０とを具えることにより、万一の場合においても、貫通管台２に対してのドリル装置４の取外し開放およびドリル装置４内へのドリル５１の収納が確実に行えるようにしており、二重の安全性を確保している。
また、ドリル装置４の先端部外周位置の下部外筒１０９に、貫通管台２の上端部を撮像して、貫通管台を確認する照明付カメラ１１３が設けられている。また、ドリル装置４の切削切粉収納空間４ａを形成する下部外筒１０９に、ドリル５１に水ジェットを吹付けてドリル５１を清掃するドリル清掃用ノズル１１２（図３、６参照方）が設けられている。 In particular, the repair device includes the emergency fixing release mechanism 30 and the emergency drill pulling mechanism 90, so that the drill device 4 can be detached from the through nozzle 2 even in the unlikely event. In addition, the drill 51 can be securely stored in the drill device 4 to ensure double safety.
In addition, the lower outer cylinder 109 at the outer peripheral position of the tip end portion of the drill device 4 is provided with an illuminated camera 113 that images the upper end portion of the through-pipe table 2 and confirms the through-pipe table. Further, a drill cleaning nozzle 112 (refer to FIGS. 3 and 6) for cleaning the drill 51 by spraying a water jet on the drill 51 is provided in the lower outer cylinder 109 forming the cutting chip storage space 4 a of the drill device 4. It has been.

次に、本補修装置の各機構を更に、具体的に説明する。
（１）固定機構１０
図２、３において固定機構１０は、その下端部が貫通管台２の上部に挿入されて固定される。補修装置のこの部分への挿入は、建屋内のクレーンで工具吊金具１０５に接続された操作用ロッド（図示せず）を吊下げ、装置底部に設けた照明付カメラ１１５よりの画像を監視しながら手動にて挿入される。固定機構１０には、図７に示すように、下部外筒１０９の底部に取付けられたシリンダ１２、内部に収納される円錐状の内面を有するピストン１３、この内側に設けられた工具固定用金具１１等で構成される。工具固定用金具１１は、円周上１２０°ピッチで合計３個所の位置でピストン１３の内側に収納されている。 Next, each mechanism of the repair device will be described more specifically.
(1) Fixing mechanism 10
2 and 3, the lower end of the fixing mechanism 10 is inserted into the upper part of the through nozzle 2 and fixed. The repair device is inserted into this part by suspending an operation rod (not shown) connected to the tool suspension bracket 105 with a crane in the building and monitoring an image from the illuminated camera 115 provided at the bottom of the device. However, it is inserted manually. As shown in FIG. 7, the fixing mechanism 10 includes a cylinder 12 attached to the bottom of the lower outer cylinder 109, a piston 13 having a conical inner surface accommodated therein, and a tool fixing bracket provided on the inside thereof. 11 etc. The tool fixing metal fitting 11 is housed inside the piston 13 at a total of three positions at a 120 ° pitch on the circumference.

シリンダ１２は水圧で駆動され、図３に示す圧力水供給口１４に圧力水が供給されるとピストン１３は下方向に移動し、これにより工具固定用金具１１は貫通管台２上部側面を押すことで補修装置の貫通管台２への固定が行われる。補修装置の固定解除は、圧力水供給口１５に圧力水を供給することで、ピストン１３は上方向に移動し、工具固定用金具１１の貫通管台２の外面への押付けは解除できる。シリンダ１２の上部には、装置を着座させるための着座金具１６が取付けられていて、貫通管台２の上部外面テーパ部にはまり込むようになっており、装置の下方向への落下を防止している。   The cylinder 12 is driven by water pressure, and when pressure water is supplied to the pressure water supply port 14 shown in FIG. 3, the piston 13 moves downward, whereby the tool fixing bracket 11 pushes the upper side surface of the through nozzle 2. In this way, the repair device is fixed to the through nozzle 2. Fixing of the repair device can be performed by supplying pressure water to the pressure water supply port 15 so that the piston 13 moves upward, and the pressing of the tool fixing bracket 11 on the outer surface of the through nozzle 2 can be released. A seating fixture 16 for seating the device is attached to the upper part of the cylinder 12 and is fitted into the upper outer surface taper portion of the through nozzle 2 to prevent the device from falling downward. ing.

（２）非常時固定解除機構３０
通常時の補修装置の固定及び固定解除は、前述の工具固定機構１０により行われるが、万一、固定の解除が出来なくなった場合には、工具固定機構１０に隣接して下部外筒１０９に支持されている非常時固定解除機構３０（図７参照方）により解除を行う。非常時、固定を解除するための軸３２は、図７に示すように、外筒３７に収納され、上方には取扱工具の挿入を容易にするためのラッパ状のガイド３６を設けている。このガイド３６は、下方に位置する外筒３７の上部に固定され、外筒３７はサポート３８を介して下部外筒１０９に固定されている。軸３２の下方部は、ネジ３５が加工されておりナット３１とかみ合っている。 (2) Emergency fixing release mechanism 30
The fixing and unfixing of the repair device in the normal state is performed by the above-described tool fixing mechanism 10, but in the unlikely event that the fixing cannot be released, the lower outer cylinder 109 is adjacent to the tool fixing mechanism 10. Release is performed by the supported emergency fixing release mechanism 30 (see FIG. 7). In an emergency, the shaft 32 for releasing the fixing is housed in an outer cylinder 37 as shown in FIG. 7, and a trumpet-shaped guide 36 for facilitating insertion of the handling tool is provided above. The guide 36 is fixed to the upper portion of the outer cylinder 37 positioned below, and the outer cylinder 37 is fixed to the lower outer cylinder 109 via a support 38. The lower part of the shaft 32 is processed with a screw 35 and is engaged with the nut 31.

このナット３１の側面には、サポート３８上に設けられたピン３４の回りを回転するレバー３３がピン結合しており、レバー３３の他端はピストン１３の上部とボルト３９（図７、８参照方）を介して接続している。ボルト３９の頭部はレバー３３先端のスリット４０に引掛けられている。従って、非常時、取扱工具にて軸３２を回転させればナット３１に取付けられたレバー３３は外筒３７に設けたスリット４１内を上下に移動する構造になっている。
ナット３１が上下移動することで、レバー３３はピン３４の回りを回転し、その他端はピストン１３の上部と結合しているため、ピストン１３が上下する構造である。従って、ピストン１３を上方向に移動させるように軸３２を取扱工具により回転させれば固定の解除が達成される。 A lever 33 that rotates around a pin 34 provided on a support 38 is pin-coupled to the side surface of the nut 31. The other end of the lever 33 is connected to the top of the piston 13 and a bolt 39 (see FIGS. 7 and 8). Are connected via The head of the bolt 39 is hooked on the slit 40 at the tip of the lever 33. Therefore, in an emergency, if the shaft 32 is rotated with a handling tool, the lever 33 attached to the nut 31 moves up and down in the slit 41 provided in the outer cylinder 37.
When the nut 31 moves up and down, the lever 33 rotates around the pin 34 and the other end is coupled to the upper part of the piston 13, so that the piston 13 moves up and down. Therefore, if the shaft 32 is rotated by the handling tool so as to move the piston 13 upward, the release of the fixation is achieved.

（３）ドリル回転機構５０
貫通管台内面を切削するドリル５１は、装置の上方に設けられた、図２に示すドリル回転機構５０により回転駆動される。ドリル回転機構５０は、上部外筒１０１内に収納され、ドリル送り用中空軸７８の上端に設けられた蓋板９１の上に取付けられる減速機付エアモータ５４、その出力軸と結合する工具回転軸５３、その下端に設けられたチャック機構５２、このチャック機構により保持されるドリル５１等より構成される。工具回転軸５３は上，下端においてドリル送り用中空軸７８の内面で支持されているベアリング５７及び５８により半径方向に支持されている。また、図３において、５５はドリル駆動用のエア供給口、５６はエア排出口を示す。 (3) Drill rotation mechanism 50
The drill 51 for cutting the inner surface of the through-pipe base is driven to rotate by a drill rotating mechanism 50 shown in FIG. 2 provided above the apparatus. The drill rotation mechanism 50 is housed in the upper outer cylinder 101, and is mounted on a cover plate 91 provided at the upper end of a drill feed hollow shaft 78, and a tool rotation shaft coupled to the output shaft of the air motor 54 with a reduction gear. 53, a chuck mechanism 52 provided at the lower end thereof, a drill 51 held by the chuck mechanism, and the like. The tool rotating shaft 53 is supported in the radial direction by bearings 57 and 58 supported on the inner surface of the drill feed hollow shaft 78 at the upper and lower ends. In FIG. 3, 55 is an air supply port for driving the drill, and 56 is an air discharge port.

（４）ドリル送り機構７０
図２、３に示すドリル送り機構７０は、ドリル回転機構５０の先端に取付けられたドリル５１を送るための機構であり、モータ７１、減速機７２、減速機７２の出力軸に取付けられた平歯車７３、この平歯車とかみ合っている平歯車７４、この平歯車７４の回転を伝えるシャフト７５、シャフト７５に取付けられドリル送り用中空軸７８のネジ７７とかみ合いこのドリル送り用中空軸７８を上下方向に進めるための送りネジ７６、ドリル送り機構７０を支持している支持筒８２等より構成されている。この支持筒８２は、そのフランジ８１が中間外筒１０６の中間外筒上フランジ１０７上にボルト８０で取付けられている。又、中間外筒１０６は中間外筒下フランジ１０８、平板１１１、下部外筒上フランジ１１０、ボルト１１９等により下部外筒１０９に固定され最終的には、固定機構１０のシリンダ１２を介して貫通管台２に固定される構造である。 (4) Drill feed mechanism 70
A drill feed mechanism 70 shown in FIGS. 2 and 3 is a mechanism for feeding a drill 51 attached to the tip of a drill rotation mechanism 50, and is a flat surface attached to an output shaft of a motor 71, a reducer 72, and a reducer 72. A gear 73, a spur gear 74 engaged with the spur gear, a shaft 75 for transmitting the rotation of the spur gear 74, and a screw 77 of a drill feed hollow shaft 78 which is engaged with the shaft 75, and the drill feed hollow shaft 78 is moved up and down. It comprises a feed screw 76 for advancing in the direction, a support cylinder 82 that supports the drill feed mechanism 70, and the like. The support cylinder 82 has a flange 81 attached to the intermediate outer cylinder upper flange 107 of the intermediate outer cylinder 106 with a bolt 80. The intermediate outer cylinder 106 is fixed to the lower outer cylinder 109 by an intermediate outer cylinder lower flange 108, a flat plate 111, a lower outer cylinder upper flange 110, a bolt 119, and the like, and finally passes through the cylinder 12 of the fixing mechanism 10. The structure is fixed to the nozzle 2.

（５）非常時ドリル引抜き機構９０
切削作業時のドリル５１の引抜きは、ドリル送り機構７０により行うが、非常時には、図２、３に示す非常時ドリル引抜き機構９０によりドリル５１の引抜きを行う。ドリル引抜き機構９０は、上部外筒１０１の上端に設けられた蓋板１０４上に固定され、工具挿入時のガイド９２とモータ軸とピン９３により結合するモータ軸回転用軸９１等より構成され、モータ軸と結合しているモータ軸回転用軸９１を別途上方から挿入する工具にて手動回転することで、モータ軸を回転しドリル５１の引抜き（ドリル装置４内への収納）を行う。 (5) Emergency drill pulling mechanism 90
The drill 51 is pulled by the drill feed mechanism 70 during the cutting operation. In an emergency, the drill 51 is pulled by the emergency drill pulling mechanism 90 shown in FIGS. The drill pulling mechanism 90 is fixed on a cover plate 104 provided at the upper end of the upper outer cylinder 101, and is configured by a motor shaft rotating shaft 91 and the like that are coupled by a guide 92, a motor shaft, and a pin 93 at the time of tool insertion. The motor shaft rotating shaft 91 coupled to the motor shaft is manually rotated by a tool inserted separately from above, whereby the motor shaft is rotated and the drill 51 is pulled out (stored in the drill device 4).

（６）貫通管台内面ブロー機構１２０
図１に示す貫通管台内面ブロー機構１２０は、チューブ挿入シリンダ１２１、ナイロンチューブ１２３、上下でナイロンチューブ１２３と結合しているステンレス製パイプ１２２、ブロー用のナイロンチューブ１２３を内装するステンレス製ガイド管１２４（図４、５参照方）等から構成されている。チューブ挿入シリンダ１２１はドリル送り機構７０を固定している支持筒８２の側面に固定されている。 (6) Through nozzle base inner surface blow mechanism 120
1 includes a tube insertion cylinder 121, a nylon tube 123, a stainless steel pipe 122 connected to the nylon tube 123 in the upper and lower directions, and a stainless steel guide tube having a nylon tube 123 for blowing. 124 (refer to FIGS. 4 and 5). The tube insertion cylinder 121 is fixed to the side surface of the support cylinder 82 that fixes the drill feed mechanism 70.

図４（ａ）〜（ｃ）に示すように、ピストンロッド１２８の下端と、ステンレス製パイプ１２２の下端とは、スプリング１２９を介して接続している。ステンレス製パイプ１２２の下端にはナイロンチューブ１２３を接続するための接続金具１３２が取付けられており、ピストンロッド１２８の下端において、スプリング取付金具１３０の上端がピストンロッド１２８に加工されたボルト１４７及びナット１４８により固定されている。
スプリング取付金具１３０の上下端は、２本のガイド１４９を挟むように２枚の板１５０を配置し、下端側はボルト１３１により締付け、ガイド１４９の外周をスライドできる構造とし、ボルト１３１の端部にスプリング１２９の下端を固定している。スプリング１２９の上端は、ステンレス製パイプ１２２の下端に取付けられたナイロンチューブ１２３を接続するための接続金具１３２に固定されている。 As shown in FIGS. 4A to 4C, the lower end of the piston rod 128 and the lower end of the stainless steel pipe 122 are connected via a spring 129. A connection fitting 132 for connecting the nylon tube 123 is attached to the lower end of the stainless steel pipe 122. At the lower end of the piston rod 128, a bolt 147 and a nut in which the upper end of the spring attachment fitting 130 is processed into the piston rod 128. It is fixed by 148.
Two plates 150 are arranged at the upper and lower ends of the spring mounting bracket 130 so as to sandwich the two guides 149, the lower end side is tightened by a bolt 131, and the outer periphery of the guide 149 can be slid. The lower end of the spring 129 is fixed to. The upper end of the spring 129 is fixed to a connection fitting 132 for connecting a nylon tube 123 attached to the lower end of the stainless steel pipe 122.

図４ないし図６により、ナイロンチューブ１２３を貫通管台２内に挿入する時のステンレス製ガイド管１２４のスイング機構について説明する。スイング機構は、固定機構１０のシリンダ１２の上面に底板１４１及びボルト（図示せず）を介して固定されている。ステンレス製ガイド管１２４の上端は、上板１３５内のスリーブ１３４に挿入、固定されている。上板１３５は、底板１４１に取付けられている縦板１４４に支持されている。   The swing mechanism of the stainless steel guide tube 124 when the nylon tube 123 is inserted into the through tube base 2 will be described with reference to FIGS. The swing mechanism is fixed to the upper surface of the cylinder 12 of the fixing mechanism 10 via a bottom plate 141 and bolts (not shown). The upper end of the stainless steel guide tube 124 is inserted and fixed to a sleeve 134 in the upper plate 135. The upper plate 135 is supported by a vertical plate 144 attached to the bottom plate 141.

一方、ステンレス製ガイド管１２４の下端は、ガイド管下部サポート１３７に取付けられ、このガイド管下部サポート１３７はピン１４２の回りを底板１４１に取付けられたピン１３９で支持されるシリンダ１３６により時計方向に回転し、この位置から離れることができる。シリンダ１３６の上端に設けられたエア供給口にエアを供給することで、図４に示すピストンロッド１２８が下方向に移動し、これに伴って、ステンレス製パイプ１２２が下方向に移動する。この移動によって、ナイロンチューブ１２３が下方向に押出され貫通管台２内に挿入される。ナイロンチューブ１２３内に水を注入することで貫通管台２内の切粉は上方に吹き上げられ下部外筒１０９の底（図３の切削切粉収納空間４ａ）に貯留する。   On the other hand, the lower end of the stainless steel guide tube 124 is attached to a guide tube lower support 137. The guide tube lower support 137 is clockwise around a pin 142 by a cylinder 136 supported by a pin 139 attached to the bottom plate 141. Can rotate and move away from this position. By supplying air to the air supply port provided at the upper end of the cylinder 136, the piston rod 128 shown in FIG. 4 moves downward, and the stainless steel pipe 122 moves downward accordingly. By this movement, the nylon tube 123 is pushed downward and inserted into the through nozzle 2. By injecting water into the nylon tube 123, the chips in the through nozzle 2 are blown upward and stored in the bottom of the lower outer cylinder 109 (cutting chip storage space 4a in FIG. 3).

本機構は、更に、下記（ａ）〜（ｃ）の構成となっている。
（ａ）ナイロンチューブ吊下げ部分
装置内に収納されているナイロンチューブ１２３は、上部外筒１０１の蓋板１０４にコイル状に巻かれた状態で吊られているため、ナイロンチューブ１２３が貫通管台２内に挿入される場合は、コイルが伸ばされた状態になるが貫通管台２内から引抜いた状態ではコイル長が復元しナイロンチューブ１２３のたるみを解消している。
（ｂ）ステンレス製パイプとピストンロッドの接続部
ナイロンチューブ１２３と上下で接続しているステンレス製パイプ１２２の先端は、ピストンロッド１２８の先端とスプリング１２９を介して接続している。このようにスプリング１２９を介した接続とすることで、ステンレス製パイプ１２２の下方向の移動量をスプリング１２９で吸収し、ナイロンチューブ１２３に過大な押込み力を加えないようにしている。
（ｃ）ステンレス製ガイド管のスイング構造
図５に示すように、ナイロンチューブ１２３の先端は、本機構の下端部に設けたステンレス製ガイド管１２４内に収納、ガイドされ、貫通管台２内に挿入される。挿入される場合はステンレス製パイプ１２２の先端位置は、貫通管台２の上方にあるが、ドリル５１で切削する場合はこの位置を回避した位置（図６中、２点鎖線位置）までスイングできる構造としている。これは下部外筒１０９の底に設けたシリンダ１３６によりステンレス製ガイド管１２４を上方の差込み部分を中心として回転させる構造である。 This mechanism has the following configurations (a) to (c).
(A) Nylon tube suspension portion Since the nylon tube 123 accommodated in the apparatus is suspended in a coiled state around the cover plate 104 of the upper outer cylinder 101, the nylon tube 123 is inserted into the through tube base. When the coil is inserted into the coil 2, the coil is in a stretched state. However, when the coil is pulled out from the through tube base 2, the coil length is restored and the slack of the nylon tube 123 is eliminated.
(B) Stainless steel pipe and piston rod connecting portion The tip of the stainless steel pipe 122 connected to the nylon tube 123 at the top and bottom is connected to the tip of the piston rod 128 via a spring 129. By connecting the spring 129 in this way, the downward movement amount of the stainless steel pipe 122 is absorbed by the spring 129 so that an excessive pushing force is not applied to the nylon tube 123.
(C) Swing structure of stainless steel guide tube As shown in FIG. 5, the tip of the nylon tube 123 is housed and guided in a stainless steel guide tube 124 provided at the lower end of this mechanism, Inserted. When inserted, the tip position of the stainless steel pipe 122 is above the penetrating nozzle 2, but when cutting with the drill 51, the position can be swung to the position (two-dot chain line position in FIG. 6). It has a structure. This is a structure in which a stainless steel guide tube 124 is rotated around an upper insertion portion by a cylinder 136 provided at the bottom of the lower outer cylinder 109.

（７）切粉回収機構１６０
切粉回収機構１６０は、図３に示すように下部外筒１０９の下部側面に設けた切粉回収用のパイプ１６１と吸込ポンプ（図示せず）から構成され、下部外筒１０９の底部（切削切粉収納空間４ａ）に吹き上げられ貯留している切粉を、吸込ポンプで吸引することにより切粉の系外への回収を図っている。 (7) Chip recovery mechanism 160
As shown in FIG. 3, the chip collection mechanism 160 includes a chip 161 for collecting chips provided on the lower side surface of the lower outer cylinder 109 and a suction pump (not shown). The chips that have been blown up and stored in the chip storage space 4a) are sucked with a suction pump to collect the chips out of the system.

（８）監視機構（照明付カメラ１１３）
図２に示すように、下部外筒１０９の下部側面には照明付カメラ１１３が取付けてあり、ドリル５１による切削状況等を監視する。又、ドリル装置４の貫通管台２への着脱に際しては、２台の照明付カメラ１１３からの画像を監視しながらドリル５１の貫通管台２への挿入を行う。 (8) Monitoring mechanism (illuminated camera 113)
As shown in FIG. 2, a camera 113 with illumination is attached to the lower side surface of the lower outer cylinder 109, and the cutting state by the drill 51 is monitored. Further, when the drill device 4 is attached to and detached from the through-pipe table 2, the drill 51 is inserted into the through-pipe table 2 while monitoring images from the two illuminated cameras 113.

また、前記各機構の他、図２に示すように、上部外筒１０１の側面に複数箇所メンテナンス用の開口部１１６を設置し、メンテナンス時に蓋板１１７を取り除くことで、メンテナンス可能としている。   In addition to the above mechanisms, as shown in FIG. 2, maintenance is possible by installing a plurality of maintenance openings 116 on the side surface of the upper outer cylinder 101 and removing the cover plate 117 during maintenance.

上述の補修装置によれば、原子力容器に設けられている貫通管台の内面切削加工を行うことができ、切削補修時に発生する切削切粉を原子炉容器内に飛散させることなく、水中条件下においても、遠隔操作により確実に補修することができる。   According to the above-described repair device, it is possible to perform inner surface cutting of the through nozzle provided in the nuclear vessel, and underwater conditions without scattering cutting chips generated during cutting repair into the reactor vessel. Can be reliably repaired by remote control.

本発明は上記実施例に限定されるものではなく必要に応じ、適宜設計変更し得るものである。また、上記実施例における各構成要素には、当業者が容易に想定できるものや、実質的に同一のものが含まれる。   The present invention is not limited to the above-described embodiments, and can be appropriately modified as necessary. In addition, each component in the embodiment includes those that can be easily assumed by those skilled in the art and those that are substantially the same.

（ａ）は貫通管台の正面図、（ｂ）は本発明方法に係るドリル装置設置時の正面図、（ｃ）は（ｂ）のア−ア矢視に沿う貫通管台内清掃時での説明図、（ｄ）は貫通管台補修後の正面図である。(A) is a front view of a through-pipe stand, (b) is a front view at the time of installation of a drill apparatus according to the method of the present invention, and (c) is a cleaning inside the through-pipe stand along the arrow A in (b). Explanatory drawing of (d) is a front view after a penetration nozzle repair. 本発明に係るドリル装置の内部構造を示す正面図である。It is a front view which shows the internal structure of the drill apparatus which concerns on this invention. 本発明に係るドリル装置の内部構造を示す側面図である。It is a side view which shows the internal structure of the drill apparatus which concerns on this invention. （ａ）は図２のＡ部分の拡大図、（ｂ）は（ａ）のｂ部分の拡大図、（ｃ）は（ｂ）のＣ−Ｃ矢視に沿う正面図である。(A) is the enlarged view of A part of FIG. 2, (b) is the enlarged view of b part of (a), (c) is a front view which follows CC arrow of (b). 図２のＢ部分の拡大図である。FIG. 3 is an enlarged view of a portion B in FIG. 2. 図５のＣ−Ｃ矢視に沿う平面図である。It is a top view which follows the CC arrow of FIG. 本発明に係るドリル装置の固定解除機構を示す正面図である。It is a front view which shows the fixation release mechanism of the drill apparatus which concerns on this invention. 本発明に係るドリル装置の固定解除機構を示す平面図である。It is a top view which shows the fixation release mechanism of the drill apparatus which concerns on this invention.

符号の説明Explanation of symbols

１ 原子炉容器下部鏡
２ 貫通管台
３ 止栓
４ ドリル装置
５、５１ ドリル
６、１０ 固定機構
５０ ドリル回転機構
７０ ドリル送り機構
９０ 非常時ドリル引抜き機構
１０９ 下部外筒
１１２ ドリル清掃用ノズル
１１３ 照明付カメラ
１２０ 貫通管台内面ブロー機構
１６０ 切粉回収機構

1 Reactor vessel lower mirror
2 Through-tube base 3 Stopper 4 Drill device 5, 51 Drill 6, 10 Fixing mechanism 50 Drill rotation mechanism 70 Drill feed mechanism 90 Emergency drill pull-out mechanism 109 Lower outer cylinder 112 Drill cleaning nozzle 113 Illuminated camera 120 Through-tube base Internal blow mechanism 160 Chip collection mechanism

Claims (6)

原子炉容器に設けられている貫通管台の軸方向に沿って支持され、切削切粉収納空間を有するドリル装置と、同ドリル装置の先端部に設けられ貫通管台への固定および解除機能を有する固定機構と、同固定機構の固定を強制解除する固定解除機構と、前記ドリル装置に設けられ前記貫通管台の内面を切削する切削工具を駆動する切削工具回転機構と、前記切削工具を前記ドリル装置の軸方向に移動させる切削工具送り機構と、前記切削工具を前記ドリル装置内に収納する切削工具引抜き機構と、貫通管台内に圧力水を吐出するブロー機構と、前記切削切粉収納空間に開口し、前記切削切粉収納空間内の切削切粉を系外に除去する切粉回収機構とを具える原子力容器貫通管台の補修装置を用いた補修方法であって、
前記貫通管台の一端部を止栓し、次に、前記貫通管台の他端部に前記補修装置を取り付け、前記貫通管台の内面を前記切削工具で切削加工し、次に、切削により発生した切削切粉を前記切削切粉収納空間内から系外に除去した後、前記止栓を取り外すことを特徴とする原子力容器貫通管台の補修方法。 It is supported along the through pipe base in the axial direction provided in the reactor vessel, and drilling apparatus that have a cutting chips housing space, fixed and released into the through pipe base provided at the distal end portion of the drilling machine A fixing mechanism having a function, a fixing release mechanism for forcibly releasing the fixing mechanism, a cutting tool rotating mechanism for driving a cutting tool provided in the drill device for cutting an inner surface of the through nozzle, and the cutting tool A cutting tool feeding mechanism for moving the cutting tool in the axial direction of the drill device, a cutting tool pulling mechanism for storing the cutting tool in the drill device, a blow mechanism for discharging pressure water into a through nozzle, and the cutting tool It is a repair method using a repair device for a nuclear vessel penetrating nozzle having an opening in a powder storage space and comprising a chip recovery mechanism for removing cutting chips in the cutting chip storage space out of the system,
One end of the through-pipe base is stoppered, then the repair device is attached to the other end of the through-pipe base, the inner surface of the through-pipe base is cut with the cutting tool, and then cut A method of repairing a nuclear vessel penetrating nozzle pedestal, wherein the generated cutting chips are removed from the cutting chip storage space to the outside of the system and then the stopper is removed. 前記切削切粉の除去を、水を供給することで、同水と共に前記切削切粉を系外に除去することを特徴とする請求項１に記載の原子力容器貫通管台の補修方法。 The method for repairing a nuclear vessel penetration nozzle according to claim 1 , wherein the cutting chips are removed together with the water by supplying water to remove the cutting chips. 前記切削切粉の除去時または除去前に、前記貫通管台内に圧力水を吐出することを特徴とする請求項１または請求項２に記載の原子力容器貫通管台の補修方法。 The method for repairing a nuclear vessel penetration nozzle according to claim 1 or 2 , wherein pressure water is discharged into the penetration nozzle before or after the removal of the cutting chips. 原子炉容器に設けられている貫通管台の軸方向に沿って支持され、切削切粉収納空間を有するドリル装置と、同ドリル装置の先端部に設けられ貫通管台への固定および解除機能を有する固定機構と、同固定機構の固定を強制解除する固定解除機構と、前記ドリル装置に設けられ前記貫通管台の内面を切削する切削工具を駆動する切削工具回転機構と、前記切削工具を前記ドリル装置の軸方向に移動させる切削工具送り機構と、前記切削工具を前記ドリル装置内に収納する切削工具引抜き機構と、貫通管台内に圧力水を吐出するブロー機構と、前記切削切粉収納空間に開口し、前記切削切粉収納空間内の切削切粉を系外に除去する切粉回収機構とを具えたことを特徴とする原子力容器貫通管台の補修装置。 It is supported along the through pipe base in the axial direction provided in the reactor vessel, and drilling apparatus that have a cutting chips housing space, fixed and released into the through pipe base provided at the distal end portion of the drilling machine A fixing mechanism having a function, a fixing release mechanism for forcibly releasing the fixing mechanism, a cutting tool rotating mechanism for driving a cutting tool provided in the drill device for cutting an inner surface of the through nozzle, and the cutting tool A cutting tool feeding mechanism for moving the cutting tool in the axial direction of the drill device, a cutting tool pulling mechanism for storing the cutting tool in the drill device, a blow mechanism for discharging pressure water into a through nozzle, and the cutting tool An apparatus for repairing a nuclear vessel penetrating nozzle, comprising: a chip collection mechanism that opens into a powder storage space and removes cutting chips in the cutting chip storage space out of the system. 前記ドリル装置の先端部外周に、貫通管台を確認する照明付カメラを設けたことを特徴とする請求項４に記載の原子力容器貫通管台の補修装置。 5. The nuclear reactor penetrating nozzle repair device according to claim 4 , wherein a lighted camera for confirming the through nozzle is provided on the outer periphery of the tip of the drill device. 前記ドリル装置に前記切削工具清掃のための流体吐出ノズルを設けたことを特徴とする請求項４または請求項５に記載の原子力容器貫通管台の補修装置。 Nuclear vessel through pipe base repair apparatus according to claim 4 or claim 5, characterized in that a fluid discharge nozzle for the cutting tool cleaned the drilling device.
JP2004270896A 2004-09-17 2004-09-17 Repair method and repair device for nuclear vessel penetration nozzle Active JP4427422B2 (en)

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