JP2006337175A - Furnace bottom part inspection repair device and its method - Google Patents

Furnace bottom part inspection repair device and its method Download PDF

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JP2006337175A
JP2006337175A JP2005162299A JP2005162299A JP2006337175A JP 2006337175 A JP2006337175 A JP 2006337175A JP 2005162299 A JP2005162299 A JP 2005162299A JP 2005162299 A JP2005162299 A JP 2005162299A JP 2006337175 A JP2006337175 A JP 2006337175A
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inspection
repair
furnace bottom
main body
repair device
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JP4634865B2 (en
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Tomoyuki Ito
智之 伊藤
Motohiko Kimura
元比古 木村
Mitsuaki Shimamura
光明 島村
Kenji Matsuzaki
謙司 松崎
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Toshiba Corp
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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
    • 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

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a furnace bottom part inspection repair device, equipped with a small-sized arm mechanism reachable up to the back of a structure, positioned near the installation place of the device. <P>SOLUTION: This furnace bottom part inspection repair device has a body part 1, fitted around a stub tube 22 erected on the furnace bottom part of a nuclear reactor 23; a vertical position determination part 2 provided inside the body part 1 and placed and positioned on the upper surface of the stub tube 22; a motor 9 for body-turning for making the body part 1 turn; a lifting mechanism 4, provided to the upper part of the body part 1 for making a lifting stand 4a lift; and an inspection repair part, provided to the lifting stand 4 for inspecting or repairing the furnace bottom part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、原子炉の炉底部の検査及び補修を行う炉底部検査補修装置及びその方法に関する。   The present invention relates to a reactor bottom inspection / repair apparatus and method for inspecting and repairing a reactor bottom of a nuclear reactor.

従来、炉底部補修装置としては、原子炉の炉底部にある制御棒駆動機構ハウジングの最上部において位置決めしている。また、検査ツール又は作業ツールのハンドリング及び移動は、制御棒駆動機構ハウジングの最上部に位置決めした装置本体からアームを展開させて、検査又は補修対象までツールを移動させることによって行っている。   Conventionally, as a furnace bottom repair device, positioning is performed at the uppermost part of the control rod drive mechanism housing at the bottom of the reactor. Further, the inspection tool or the work tool is handled and moved by unfolding the arm from the apparatus main body positioned at the uppermost part of the control rod drive mechanism housing and moving the tool to the inspection or repair target.

この種の炉底部装置としては、原子炉内構造物の保全・補修装置が知られている（例えば、特許文献１参照）。   As this type of reactor bottom device, a maintenance / repair device for a reactor internal structure is known (for example, see Patent Document 1).

この炉底部装置においては、この炉底部装置の位置決めは、検査又は作業対象である炉底部からかなり離れた制御棒駆動機構ハウジング又は炉心支持板で行われていた。   In this furnace bottom part apparatus, the positioning of the furnace bottom part apparatus is performed by a control rod drive mechanism housing or a core support plate which is considerably separated from the furnace bottom part to be inspected or operated.

このため、炉底部検査補修装置をＣＲＤハウジングの最上部に設置する場合は、ＣＲＤハウジングの最上部から最下部までの高さは、ＣＲＤハウジングの取り付け場所により高さが約1．5ｍから約０．１ｍまでの範囲の長さに対応する必要があるので、炉底部検査補修装置の本体の長さが大きくなる。また、原子炉の周辺では、炉底部検査補修装置の上部の固定部を、原子炉の中央部にある炉心支持板を利用して固定する必要があるため、炉底部検査補修装置の長さが４ｍ以上となっていた。
特開２００１-２５５３９５号公報 Therefore, when the furnace bottom inspection / repair device is installed at the top of the CRD housing, the height from the top of the CRD housing to the bottom is about 1.5 m to about 0 depending on the mounting location of the CRD housing. Since it is necessary to correspond to the length of the range up to 1 m, the length of the main body of the furnace bottom inspection / repair device is increased. Also, in the vicinity of the reactor, it is necessary to fix the upper fixed part of the reactor bottom inspection and repair device using the core support plate in the center of the reactor, so the length of the reactor bottom inspection and repair device is long. It was over 4m.
JP 2001-255395 A

上述した従来の炉底部装置においては、この炉底部装置の位置決めは、検査又は作業対象である炉底部からかなり離れた制御棒駆動機構ハウジング又は炉心支持板で行われていた。このため、炉底部装置はこの隔離された距離を連結する必要があり、炉底部装置の外形寸法が大きくなり取り扱いが困難であるという課題があった。   In the above-described conventional furnace bottom apparatus, the positioning of the furnace bottom apparatus is performed by the control rod drive mechanism housing or the core support plate which is considerably away from the furnace bottom part to be inspected or operated. For this reason, it is necessary for the furnace bottom part apparatus to connect this isolated distance, and there is a problem that the outer dimension of the furnace bottom part apparatus becomes large and is difficult to handle.

また、検査ツール又は補修ツールを検査又は補修対象まで移動させるアーム機構についても、装置本体両側から２本のアームが駆動し、装置本体から外周方向に展開するため、アーム自体の占有領域が大きくなり、また装置の設置場所の近傍に位置する構造物の背面までアームを到達させることは不可能であるという課題があった。   In addition, for the arm mechanism that moves the inspection tool or repair tool to the inspection or repair target, the two arms are driven from both sides of the device body and deployed from the device body in the outer circumferential direction, so the area occupied by the arm itself increases. In addition, there is a problem that it is impossible to reach the arm to the back surface of the structure located in the vicinity of the installation location of the apparatus.

本発明は上述した課題を解決するためになされたもので、小型でかつ装置の設置場所近傍に位置する構造物の背面まで到達できるアーム機構を備えた炉底部検査補修装置及びその方法を提供することを目的とする。   The present invention has been made to solve the above-described problems, and provides a furnace bottom inspection and repair apparatus including an arm mechanism that is small and can reach the back surface of a structure located in the vicinity of the apparatus installation location. For the purpose.

上記目的を達成するため、本発明の炉底部検査補修装置においては、原子炉の炉底部に立設された制御棒駆動機構ハウジングのスタブチューブに外嵌された本体部と、この本体部の内部に設けられ前記スタブチューブの上面に載置されて位置決めされる上下位置決め部と、前記本体部を旋回させる旋回機構と、前記本体部の上部に設けられ昇降台を昇降させる昇降機構と、この昇降台に設けられ前記炉底部を検査又は補修する検査補修部と、を有することを特徴とするものである。   In order to achieve the above object, in the furnace bottom inspection / repair device of the present invention, a main body part externally fitted to a stub tube of a control rod drive mechanism housing erected on the reactor bottom part of a nuclear reactor, and an inside of the main body part A vertical positioning part that is placed and positioned on the upper surface of the stub tube, a turning mechanism that turns the main body part, an elevating mechanism that is provided on the upper part of the main body part and raises and lowers a lifting platform, and And an inspection / repair unit that is provided on a table and inspects or repairs the furnace bottom.

また、上記目的を達成するため、本発明の炉底部検査補修方法においては、原子炉の炉底部に立設された制御棒駆動機構ハウジングのスタブチューブに外嵌され載置されて本体部を位置決めする上下位置決めステップと、この位置決めされた本体部を旋回させる旋回ステップと、この旋回された本体部の上部に設けられた昇降機構の昇降台を昇降させる昇降ステップと、この昇降された昇降台に設けられた展開アームを展開させる展開ステップと、この展開された展開アームの先端に設けられた検査補修部を回転させる検査補修部回転ステップと、この回転された検査補修部で前記炉底部を検査又は補修する検査修理ステップと、を有することを特徴とするものである。     Further, in order to achieve the above object, in the furnace bottom inspection and repair method of the present invention, the main body is positioned by being externally fitted and mounted on the stub tube of the control rod drive mechanism housing standing on the reactor bottom of the nuclear reactor. An up-and-down positioning step, a turning step for turning the positioned main body, a raising and lowering step for raising and lowering a lifting and lowering mechanism provided on the upper part of the turned main body, and the raised and lowered lifting platform A deployment step for deploying the deployed deployment arm, an inspection repair section rotation step for rotating the inspection repair section provided at the tip of the deployed deployment arm, and the furnace bottom section is inspected by the rotated inspection repair section. Or an inspection / repair step for repairing.

本発明によれば、炉底部検査補修装置を原子炉の炉底部に立設するスタブチューブに載置することにより、小型でかつ装置本体の設置場所近傍に位置する構造物の背面まで到達できるアーム機構を得ることができ、装置本体の取り扱いが容易となり、作業時間の軽減が可能となり、さらに、従業員の放射線被曝の低減を図ることができる。   According to the present invention, by mounting the furnace bottom inspection / repair device on the stub tube standing on the reactor bottom of the nuclear reactor, the arm is small and can reach the back of the structure located near the installation location of the apparatus main body. A mechanism can be obtained, the handling of the apparatus main body is facilitated, the working time can be reduced, and further, the radiation exposure of employees can be reduced.

以下、本発明に係る炉底部補修装置の実施の形態について、図１乃至図５を参照して説明する。ここで、互いに同一又は類似の部分には共通の符号を付すことにより、重複説明を省略する。 Hereinafter, an embodiment of a furnace bottom repair apparatus according to the present invention will be described with reference to FIGS. 1 to 5. Here, the same or similar parts are denoted by common reference numerals, and redundant description is omitted.

まず、本発明の第１の実施の形態について説明する。   First, a first embodiment of the present invention will be described.

図１は、本発明の第１の実施の形態の炉底部検査補修装置を示す正面図であり、図２は、図１の炉底部検査補修装置を示す鳥瞰図である。   FIG. 1 is a front view showing a furnace bottom inspection / repair device according to a first embodiment of the present invention, and FIG. 2 is a bird's eye view showing the furnace bottom inspection / repair device of FIG.

図１及び図２に示すように、炉底部検査補修装置の本体部１は、原子炉２３の炉底部を貫通し林立する制御棒駆動機構ハウジング（以下「ＣＲＤハウジング」という。）２１を溶接にて固定するスタブチューブ２２に外嵌される。この本体部１は、スタブチューブ２２の外径より大きい内径を持つ上部円板１ａ、下部円板１ｂより構成される。この上部円板１ａ、下部円板１ｂは、スタブチューブ２２の周囲に沿って旋回するように配置された回転ローラ３及び固定ピン３ａにより固定されている。   As shown in FIGS. 1 and 2, the main body 1 of the reactor bottom inspection and repair apparatus welds a control rod drive mechanism housing (hereinafter referred to as “CRD housing”) 21 that penetrates the reactor bottom of the reactor 23 and stands. And is fitted on the stub tube 22 to be fixed. The main body 1 is composed of an upper disk 1a and a lower disk 1b having an inner diameter larger than the outer diameter of the stub tube 22. The upper disk 1a and the lower disk 1b are fixed by a rotating roller 3 and a fixing pin 3a that are arranged so as to turn along the periphery of the stub tube 22.

また、この本体部１の内部に設けられた上下位置決め部２は、前記スタブチューブ２２の上面に載置されて本体部１の位置決めが行われる。この上下位置決め部２により、炉底部検査補修装置の上下方向の位置は、スタブチューブ２２の上面が基準となって決定される。この上下位置決め部２は、上部円板１ａの下面に設けられ、スタブチューブ２２の上面を走行するローラ２ａを付属する構成とすることも可能である。   Further, the vertical positioning portion 2 provided inside the main body 1 is placed on the upper surface of the stub tube 22 so that the main body 1 is positioned. By the vertical positioning part 2, the vertical position of the furnace bottom inspection / repair device is determined based on the upper surface of the stub tube 22. The vertical positioning portion 2 may be provided on the lower surface of the upper disk 1a and may include a roller 2a that travels on the upper surface of the stub tube 22.

この上部円板１ａの上部に、さらに、据付部１ｃが設けられている。この据付部１ｃの上面には、本体回転用モータ９、昇降用モータ５、昇降機構４が設置されている。   An installation portion 1c is further provided on the upper part of the upper disk 1a. A main body rotating motor 9, a lifting motor 5, and a lifting mechanism 4 are installed on the upper surface of the installation portion 1c.

この本体回転用モータ９の回転は、ギア等から構成される伝達機構１３を介して本体部１に伝達されて、本体部１を旋回させる。   The rotation of the main body rotation motor 9 is transmitted to the main body 1 via a transmission mechanism 13 including a gear or the like, and the main body 1 is turned.

この昇降用モータ５の回転は、ギア等から構成される伝達機構１４を介して昇降機構４に伝達されて、この昇降機構４の軸に沿って昇降台４ａが上下動する。   The rotation of the elevating motor 5 is transmitted to the elevating mechanism 4 via a transmission mechanism 14 composed of a gear or the like, and the elevating platform 4 a moves up and down along the axis of the elevating mechanism 4.

昇降台４ａには、カメラ等の検査部６や溶接機等の補修部７が、先端が回転する先端回転機構１２を介して配設されている。その他に、ミラー８が配設されている。   An inspection unit 6 such as a camera and a repair unit 7 such as a welding machine are disposed on the lifting platform 4a via a tip rotation mechanism 12 whose tip rotates. In addition, a mirror 8 is provided.

このように構成された本実施の形態において、炉底部検査補修装置は、原子炉２３の炉底部を貫通し林立するＣＲＤハウジング２１を溶接にて固定するスタブチューブ２２の上面に載置され位置決めされる。本体回転用モータ９により本体部１は旋回し、昇降用モータ５により昇降台４ａは上下移動する。このように昇降台４ａの位置決めを行うことにより、昇降台４ａに取り付けたカメラ等の検査部６や溶接機等の補修部７を駆動して、原子炉２３の炉底部の補修、保全作業を施工することができる。   In the present embodiment configured as described above, the reactor bottom inspection and repair device is placed and positioned on the upper surface of the stub tube 22 that fixes the CRD housing 21 that penetrates the reactor bottom of the nuclear reactor 23 and stands by welding. The The main body 1 is turned by the main body rotating motor 9, and the elevating table 4 a is moved up and down by the elevating motor 5. By positioning the lifting platform 4a in this way, the inspection section 6 such as a camera attached to the lifting platform 4a and the repair section 7 such as a welding machine are driven to repair and maintain the bottom of the reactor 23. Can be constructed.

本実施の形態によれば、炉底部検査補修装置の位置決めは、原子炉２３の炉底部を貫通し立設するＣＲＤハウジング２１を溶接にて固定するスタブチューブ２２の上面に載置して位置決めすることができる。このスタブチューブ２２の高さは、原子炉２３の底部での設置場所が変わってもほぼ同じ高さであるため、炉底部検査補修装置の全体高さを低く抑えることができる。従来、炉底部検査補修装置を原子炉２３の中央部にある炉心支持板（図示せず）を利用して固定する場合は、炉底部検査補修装置の長さが４ｍ以上となっていた。本実施の形態においては、炉心支持板を利用して固定する必要がなくなり、その分だけ、炉底部検査補修装置の本体の短縮化を図ることができる。   According to the present embodiment, positioning of the reactor bottom inspection and repair device is performed by placing the CRD housing 21 penetrating through the reactor bottom of the reactor 23 and placing it on the upper surface of the stub tube 22 fixed by welding. be able to. Since the height of the stub tube 22 is substantially the same even if the installation location at the bottom of the reactor 23 is changed, the overall height of the reactor bottom inspection / repair device can be kept low. Conventionally, when the reactor bottom inspection / repair device is fixed using a core support plate (not shown) at the center of the reactor 23, the length of the reactor bottom inspection / repair device is 4 m or more. In the present embodiment, it is not necessary to fix using the core support plate, and the main body of the furnace bottom inspection / repair device can be shortened accordingly.

また、本実施の形態によれば、炉底部検査補修装置の外形寸法が小さくなり軽量化を図ることができるために、人力により炉底部検査補修装置を持ち上げることができ、原子炉２３の上部に配置されたオペレーションフロア上を走行する燃料交換機に付属する補助ホイストを使用すれば、オペレーションフロアから直接原子炉２３に投入することも可能となる。このため、天井クレーン（図示せず）による作業を必要としないで原子炉２３の炉底部の補修、保全作業を施工することができるので、作業工数を大幅に減らすことが可能となり、従業員の被曝低減を図ることができる。   In addition, according to the present embodiment, since the outer dimension of the furnace bottom inspection / repair device is reduced and the weight can be reduced, the furnace bottom inspection / repair device can be lifted by human power, If an auxiliary hoist attached to a fuel exchanger traveling on the operation floor is used, the reactor 23 can be directly input from the operation floor. For this reason, since repair and maintenance work of the bottom of the reactor 23 can be performed without requiring work with an overhead crane (not shown), the number of work steps can be greatly reduced. It is possible to reduce exposure.

また、本実施の形態において、昇降台４ａには、カメラ等の検査部６又は溶接機等の補修部７が、先端回転機構１２を介して配設されている。このため、本体部１を持ち上げて旋回することなく、検査部６又は補修部７を先端回転機構１２により旋回することができる。このため、原子炉２３の炉底部に設置された炉底部検査補修装置の検査部又は作業部を、原子炉２３の炉底部にあるスタブチューブやＣＲＤハウジング２１等の溶接線に沿って連続的に移動して検査又は作業をすることができ、検査又は作業時間を大幅に短縮することが可能となる。   In the present embodiment, an inspection unit 6 such as a camera or a repair unit 7 such as a welding machine is disposed on the lifting platform 4 a via a tip rotation mechanism 12. For this reason, the inspection unit 6 or the repair unit 7 can be swung by the tip rotation mechanism 12 without lifting the main body 1 and swiveling. For this reason, the inspection part or the working part of the reactor bottom inspection / repair device installed at the reactor bottom of the reactor 23 is continuously along the welding line of the stub tube, the CRD housing 21 and the like at the reactor bottom. The inspection or operation can be performed by moving, and the inspection or operation time can be greatly shortened.

次に、本発明の第２の実施の形態について説明する。   Next, a second embodiment of the present invention will be described.

図３は、本発明の第２の実施の形態の炉底部検査補修装置を示す鳥瞰図である。図３は、図１の構成の変形例であり、主に、図１と相違する構成について説明する。   FIG. 3 is a bird's-eye view showing the furnace bottom inspection / repair device according to the second embodiment of the present invention. FIG. 3 is a modified example of the configuration of FIG. 1 and mainly describes a configuration different from FIG.

図３に示すように、昇降機構４の軸に沿って上下移動する昇降台４ａには、展開アーム１０が付属されている。この展開アーム１０の根元部には、振り上げ駆動機構１１が取り付けられ、展開アーム１０の先端部を上下移動して展開している。展開アーム１０の先端部には、カメラ等の検査部６又は溶接機等の補修部７が、先端回転機構１２を介して配設されている。その他に、ミラー８が配設されている。なお、この検査補修部は、炉底部を検査する検査部６及び炉底部を補修する補修部７の少なくとも一つを具備する構成とする。   As shown in FIG. 3, a deployment arm 10 is attached to the lifting platform 4 a that moves up and down along the axis of the lifting mechanism 4. A swing-up drive mechanism 11 is attached to the root portion of the deployment arm 10, and the distal end portion of the deployment arm 10 is moved up and down to be deployed. An inspection section 6 such as a camera or a repair section 7 such as a welding machine is disposed at the distal end portion of the deployment arm 10 via a distal end rotation mechanism 12. In addition, a mirror 8 is provided. The inspection / repair section includes at least one of an inspection section 6 that inspects the furnace bottom and a repair section 7 that repairs the furnace bottom.

このように、展開する展開リンク１０と検査部６又は補修部７との間に先端回転機構１２を設けることにより、検査部６又は補修部７が同じ角度で変化しながら回転する。この展開アーム１０の動きにより、検査部６又は補修部７を本体部１から離れた位置に移動させることができる。   In this way, by providing the tip rotation mechanism 12 between the deployment link 10 to be deployed and the inspection unit 6 or the repair unit 7, the inspection unit 6 or the repair unit 7 rotates while changing at the same angle. By the movement of the deployment arm 10, the inspection unit 6 or the repair unit 7 can be moved to a position away from the main body unit 1.

図４は、図３の展開アーム１０を開いて検査部６及び補修部７を隣接するインコアモニタ２４の背面に位置決めした状態を示す上面図である。   FIG. 4 is a top view showing a state in which the deployment arm 10 of FIG. 3 is opened and the inspection unit 6 and the repair unit 7 are positioned on the back surface of the adjacent in-core monitor 24.

図４に示すように、上下に昇降する昇降台４ａには、展開アーム１０を介して、カメラ等の検査部６又は溶接機等の補修部７が配設されている。このため、本体部１を持ち上げて上下移動することなく、検査部６又は補修部７の上下移動を、昇降台４ａの上下移動により行うことができる。   As shown in FIG. 4, an inspection unit 6 such as a camera or a repair unit 7 such as a welding machine is disposed on a lifting platform 4 a that moves up and down via a deployment arm 10. Therefore, the vertical movement of the inspection unit 6 or the repair unit 7 can be performed by the vertical movement of the lifting platform 4a without lifting the main body 1 and moving it up and down.

このように構成された本実施の形態において、炉底部検査補修装置の検査部６又は補修部７の位置決めは、上下に昇降する昇降台４ａ、展開する展開アーム１０及び先端回転機構１２を介して行われる。このため、この展開する展開アーム１０は、検査部６又は補修部７を、本体部１に対して水平又は上下の位置を変化させるように移動する。   In this embodiment configured as described above, positioning of the inspection unit 6 or the repair unit 7 of the furnace bottom portion inspection / repair device is performed via the elevating platform 4a that moves up and down, the deployment arm 10 that deploys, and the tip rotation mechanism 12. Done. For this reason, the deployment arm 10 to be deployed moves the inspection unit 6 or the repair unit 7 so as to change the horizontal or vertical position with respect to the main body unit 1.

このように構成された本実施の形態において、先端回転機構１２を駆動した場合、検査部６又は補修部７と展開リンク１０との軸線を変化させることができる。上下方向に昇降する昇降台４ａには、カメラ等の検査部６又は溶接機等の補修部７が配設されている。   In the present embodiment configured as described above, when the tip rotation mechanism 12 is driven, the axes of the inspection unit 6 or the repair unit 7 and the deployment link 10 can be changed. An inspection section 6 such as a camera or a repair section 7 such as a welding machine is disposed on the lifting platform 4a that moves up and down.

本実施の形態によれば、展開する展開アーム１０、昇降台４ａ及び先端回転機構１２を駆動させることにより、検査部６又は補修部７を本体部１の設置場所に対し、可変である。そのため、本体部１の設置部以外の溶接線の検査・補修等の作業を施工することができる。すなわち、本体部１を持ち上げて上下移動することなく、検査部６又は補修部７の上下移動を、昇降台４ａの上下移動等により行うことができる。   According to the present embodiment, the inspection unit 6 or the repair unit 7 can be changed with respect to the installation location of the main body unit 1 by driving the deployment arm 10 to be deployed, the lifting platform 4a, and the tip rotation mechanism 12. Therefore, operations such as inspection and repair of the weld line other than the installation portion of the main body 1 can be performed. That is, the vertical movement of the inspection unit 6 or the repair unit 7 can be performed by the vertical movement of the lifting platform 4a or the like without lifting the main body 1 and moving up and down.

このため、検査部６又は補修部７の上下動を、昇降台４ａの上下移動により行うことができるので、原子炉２３の炉底部とスタブチューブ２２との溶接線の高さに変化が有っても、検査部又は補修部の位置決めを円滑に追従することができる。   For this reason, since the vertical movement of the inspection unit 6 or the repair unit 7 can be performed by the vertical movement of the lifting platform 4a, there is a change in the height of the welding line between the bottom of the reactor 23 and the stub tube 22. However, the positioning of the inspection part or the repair part can be smoothly followed.

また、本実施の形態によれば、検査部６又は補修部７の軸線と展開リンク１０の軸線を変化させることが可能である。このため、隣接するインコアモニタ２４、ＣＲＤハウジング２１等の構造物の背面に検査部６又は補修部７を回り込ませることが可能となり、本体部１を引上げて位置を変更することなく、先端回転機構１２を回転するだけで、隣接する構造物の背面の検査又は溶接作業等を円滑に施工することができる。   Moreover, according to this Embodiment, it is possible to change the axis line of the test | inspection part 6 or the repair part 7, and the axis line of the expansion | deployment link 10. FIG. For this reason, it becomes possible to make the inspection part 6 or the repair part 7 wrap around the rear surface of the structure such as the adjacent in-core monitor 24 and the CRD housing 21, and the tip rotation mechanism without changing the position by pulling up the main body part 1. By simply rotating 12, it is possible to smoothly perform an inspection or welding operation on the back surface of an adjacent structure.

図４は、本発明の実施の形態の炉底部検査補修方法の手順を示すフロー図である。図４に示すように、上下位置決めステップＳ１において、原子炉２３の炉底部に立
設されたＣＲＤハウジング２１のスタブチューブ２２に外嵌し、このスタブチューブ２２の上面に上下位置決め部２を載置して本体部１を位置決めする。 FIG. 4 is a flowchart showing a procedure of the furnace bottom inspection and repair method according to the embodiment of the present invention. As shown in FIG. 4, in the vertical positioning step S <b> 1, the vertical positioning portion 2 is fitted on the stub tube 22 of the CRD housing 21 erected on the bottom of the reactor 23, and the upper vertical positioning portion 2 is placed on the upper surface of the stub tube 22. Then, the main body 1 is positioned.

旋回ステップＳ２において、この上下位置決めされた本体部１を本体旋回用モータ９により旋回する。   In the turning step S <b> 2, the body portion 1 positioned up and down is turned by the body turning motor 9.

昇降ステップＳ３において、必要に応じて、本体部１上に設けられた昇降機構４の軸に沿って昇降台４ａを昇降する。この昇降台４ａの上下移動は、後述する展開ステップＳ４の後で施工することもあり、必要に応じて施行する。   In the lifting step S3, the lifting platform 4a is lifted and lowered along the axis of the lifting mechanism 4 provided on the main body 1 as necessary. This vertical movement of the lifting platform 4a may be performed after a development step S4, which will be described later, and is performed as necessary.

展開ステップＳ４において、昇降台４ａに設けられた振り上げ駆動機構１１を駆動することにより展開アーム１０を展開し、展開アーム１０の先端の位置決めを行う。   In the deployment step S4, the deployment arm 10 is deployed by driving the swing-up drive mechanism 11 provided on the lifting platform 4a, and the distal end of the deployment arm 10 is positioned.

検査補修部回転ステップＳ５において、この展開された展開アーム１０の先端に設けられた先端回転機構１２を回転し、展開アーム１０の先端を、隣接するインコアモニタ２３、ＣＲＤハウジング２１等の炉内構造物の背面に回り込みする。   In the inspection / repair section rotation step S5, the distal end rotating mechanism 12 provided at the distal end of the deployed deployment arm 10 is rotated, and the distal end of the deployment arm 10 is moved to the in-furnace structure such as the adjacent in-core monitor 23 and CRD housing 21. Wrap around the back of the object.

検査補修ステップＳ６において、この回り込みされた展開アーム１０の先端に設けられた検査部６又は補修部７で前記炉底部に存在する隣接するインコアモニタ２３、ＣＲＤハウジング２１の溶接等を検査又は補修する。   In the inspection / repair step S6, the inspection portion 6 or the repair portion 7 provided at the distal end of the deployed deployment arm 10 inspects or repairs the welding of the adjacent in-core monitor 23 and CRD housing 21 existing on the furnace bottom. .

本実施の形態によれば、検査部６又は補修部７の軸線と展開リンク１０の軸線とを変化させることができる。このため、隣接するインコアモニタ２４、ＣＲＤハウジング２１等の構造物の背面に検査部６又は補修部７を回り込ませることが可能である。このため、本体部１を引上げて位置を変更することなく、先端回転機構１２を回転するだけで、隣接する構造物の背面の検査又は溶接作業等を円滑に施工することができる。   According to the present embodiment, the axis of the inspection unit 6 or the repair unit 7 and the axis of the deployment link 10 can be changed. For this reason, it is possible to make the inspection part 6 or the repair part 7 wrap around the back surface of structures such as the adjacent in-core monitor 24 and the CRD housing 21. For this reason, it is possible to smoothly perform the inspection or welding operation of the rear surface of the adjacent structure by simply rotating the tip rotation mechanism 12 without pulling up the main body 1 and changing the position.

さらに、本発明は、上述したような各実施の形態に何ら限定されるものではなく、本発明の主旨を逸脱しない範囲で種々変形して実施することができる。   Furthermore, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

本発明の第１の実施の形態の炉底部検査補修装置を示す正面図。The front view which shows the furnace bottom part inspection repair apparatus of the 1st Embodiment of this invention. 図１の炉底部検査補修装置を示す鳥瞰図。The bird's-eye view which shows the furnace bottom part inspection repair apparatus of FIG. 本発明の第２の実施の形態の炉底部検査補修装置を示す鳥瞰図。The bird's-eye view which shows the furnace bottom part inspection repair apparatus of the 2nd Embodiment of this invention. 図２の展開リンクを開いて、検査部及び補修部を、隣接するインコアモニタの背面に位置決めした状態を示す上面図。The top view which shows the state which opened the expansion | deployment link of FIG. 2, and positioned the test | inspection part and the repair part on the back surface of the adjacent in-core monitor. 本発明の実施の形態の炉底部検査補修方法の手順を示すフロー図。The flowchart which shows the procedure of the furnace bottom part inspection repair method of embodiment of this invention.

符号の説明Explanation of symbols

１・・・本体部、１ａ・・・上部円板、１ｂ・・・下部円板、１ｃ・・・据付部、２・・・上下位置決め部、３・・・回転用ローラ、４・・・昇降機構、４ａ・・・昇降台、５・・・昇降用モータ、６・・・検査部（カメラ）、７・・・作業部、８・・・ミラー、９・・・本体旋回用モータ、１０・・・展開アーム、１１・・・振り上げ駆動機構、１２・・・先端回転機構、１３、１４・・・伝達機構、２１・・ＣＲＤハウジング、２２・・・スタブチューブ、２３・・・原子炉、２４・・・インコアモニタ。   DESCRIPTION OF SYMBOLS 1 ... Main-body part, 1a ... Upper disk, 1b ... Lower disk, 1c ... Installation part, 2 ... Vertical positioning part, 3 ... Roller for rotation, 4 ... Elevating mechanism, 4a ... elevating platform, 5 ... elevating motor, 6 ... inspection unit (camera), 7 ... working unit, 8 ... mirror, 9 ... motor for turning the body, DESCRIPTION OF SYMBOLS 10 ... Unfolding arm, 11 ... Swing drive mechanism, 12 ... Tip rotation mechanism, 13, 14 ... Transmission mechanism, 21 ... CRD housing, 22 ... Stub tube, 23 ... Atom Furnace, 24 ... In-core monitor.

Claims (9)

原子炉の炉底部に立設された制御棒駆動機構ハウジングのスタブチューブに外嵌された本体部と、
この本体部の内部に設けられ前記スタブチューブの上面に載置されて位置決めされる上下位置決め部と、
前記本体部を旋回させる旋回機構と、
前記本体部の上部に設けられ昇降台を昇降させる昇降機構と、
この昇降台に設けられ前記炉底部を検査又は補修する検査補修部と、
を有することを特徴とする炉底部検査補修装置。 A main body part fitted on a stub tube of a control rod drive mechanism housing erected on the bottom of the reactor;
An upper and lower positioning portion provided inside the main body portion and placed and positioned on the upper surface of the stub tube;
A turning mechanism for turning the main body,
An elevating mechanism provided at the upper part of the main body to elevate the elevating platform;
An inspection / repair unit for inspecting or repairing the bottom of the furnace provided on the lifting platform;
A furnace bottom inspection and repair device characterized by comprising: 前記旋回機構は、前記本体部の上部に設けられた据付部に配置された本体旋回用モータにより前記本体部を旋回させること、を特徴とする請求項１記載の炉底部検査補修装置。   The furnace bottom inspection and repair device according to claim 1, wherein the turning mechanism turns the main body by a main body turning motor arranged in an installation portion provided at an upper portion of the main body. 前記昇降機構は、前記本体部の上部に設けられた据付部に配置された昇降用モータにより前記昇降台を昇降させること、を特徴とする請求項１又は２記載の炉底部検査補修装置。   The furnace bottom inspection and repair device according to claim 1, wherein the elevating mechanism elevates and lowers the elevating platform by an elevating motor disposed in an installation portion provided at an upper portion of the main body. 前記検査補修部は、先端回転機構を介して前記昇降台に設置されること、を特徴とする請求項１乃至３のいずれかに記載の炉底部検査補修装置。   The furnace bottom inspection / repair device according to any one of claims 1 to 3, wherein the inspection / repair unit is installed on the lifting platform via a tip rotation mechanism. 前記検査補修部は、展開アームを介して前記昇降台に設置されること、を特徴とする請求項１記載の炉底部検査補修装置。   The furnace bottom inspection / repair device according to claim 1, wherein the inspection / repair unit is installed on the lifting platform via a deployment arm. 前記展開アームは、振り上げ駆動機構により展開すること、を特徴とする請求項５記載の炉底部検査補修装置。   The furnace bottom inspection and repair device according to claim 5, wherein the deployment arm is deployed by a swing-up drive mechanism. 前記検査補修部は、先端回転機構を介して前記展開アームの先端に設置されること、を特徴とする請求項５又は６記載の炉底部検査補修装置。   The furnace bottom inspection and repair device according to claim 5 or 6, wherein the inspection and repair section is installed at a tip of the deployment arm via a tip rotation mechanism. 前記検査補修部は、前記炉底部を検査する検査部及び前記炉底部を補修する補修部の少なくとも一つを具備すること、を特徴とする請求項１乃至７のいずれかに記載の炉底部検査補修装置。   The furnace bottom part inspection according to any one of claims 1 to 7, wherein the inspection repair part includes at least one of an inspection part for inspecting the furnace bottom part and a repair part for repairing the furnace bottom part. Repair device. 原子炉の炉底部に立設された制御棒駆動機構ハウジングのスタブチューブに外嵌され載置されて本体部を位置決めする上下位置決めステップと、
この位置決めされた本体部を旋回させる旋回ステップと、
この旋回された本体部の上部に設けられた昇降機構の昇降台を昇降させる昇降ステップと、
この昇降された昇降台に設けられた展開アームを展開させる展開ステップと、
この展開された展開アームの先端に設けられた検査補修部を回転させる検査補修部回転ステップと、
この回転された検査補修部で前記炉底部を検査又は補修する検査補修ステップと、
を有することを特徴とする炉底部検査補修方法。 An up-and-down positioning step for positioning the main body by being externally fitted and mounted on a stub tube of a control rod drive mechanism housing installed on the bottom of the reactor;
A turning step for turning the positioned main body,
An elevating step for raising and lowering an elevating platform of an elevating mechanism provided at the upper part of the swiveled main body,
A deployment step for deploying a deployment arm provided on the raised platform;
Inspection repair part rotation step for rotating the inspection repair part provided at the tip of the deployed deployment arm,
An inspection / repair step for inspecting or repairing the furnace bottom with the rotated inspection / repair unit;
A method for inspecting and repairing the bottom of the furnace, comprising:
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JP2008216012A (en) * 2007-03-02 2008-09-18 Toshiba Corp Maintenance and repair device for structure inside nuclear reactor
US8331522B2 (en) 2007-03-02 2012-12-11 Kabushiki Kaisha Toshiba Maintenance and repair device for structure inside nuclear reactor
US8913708B2 (en) 2007-03-02 2014-12-16 Kabushiki Kaisha Toshiba Maintenance/repair device for reactor internal structure
WO2010038876A1 (en) 2008-10-03 2010-04-08 株式会社東芝 Method of repairing bottom section of nuclear reactor
JP2011209254A (en) * 2010-03-31 2011-10-20 Hitachi-Ge Nuclear Energy Ltd Nondestructive inspection method in bottom mirror part of reactor pressure vessel

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