JPS6267499A - Washer for reactor wall - Google Patents
Washer for reactor wallInfo
- Publication number
- JPS6267499A JPS6267499A JP20654785A JP20654785A JPS6267499A JP S6267499 A JPS6267499 A JP S6267499A JP 20654785 A JP20654785 A JP 20654785A JP 20654785 A JP20654785 A JP 20654785A JP S6267499 A JPS6267499 A JP S6267499A
- Authority
- JP
- Japan
- Prior art keywords
- cleaning device
- furnace wall
- wall cleaning
- nozzle
- scattering prevention
- 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.)
- Pending
Links
Landscapes
- Cleaning In General (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は原子炉圧力容器の内壁面を高圧ジェット噴射方
式で洗浄する装置に係り、特に装置取付取外時の作業者
の被爆低減を計るため遠隔操作機能を設けたものに関す
る。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a device for cleaning the inner wall surface of a nuclear reactor pressure vessel using a high-pressure jet injection method, particularly for reducing radiation exposure of workers when installing and removing the device. Relates to devices equipped with a remote control function.
従来、原子炉圧力容器の内壁洗浄装置は特許出願公開昭
５４−０１３８９８に記載のように原子炉圧力容器のフ
ランジ上面に設置させ、ノズルを昇降させる駆動機構と
ノズルを回転させる旋回駆動機構を有し、高圧ジェット
水をノズル先端より噴射させ、洗浄する構造であった。Conventionally, an inner wall cleaning device for a reactor pressure vessel is installed on the upper surface of a flange of a reactor pressure vessel, as described in Patent Application Publication No. 54-013898, and has a drive mechanism for raising and lowering a nozzle and a rotation drive mechanism for rotating the nozzle. The structure was such that high-pressure jet water was sprayed from the tip of the nozzle for cleaning.
しかし、原子炉圧力容器のフランジ上面に設置の際１作
業者がバルクヘッドプレート上で行なう作業が多くある
。例をあげれば、原子炉圧力容器と装置の芯出し作業、
ミスト飛散防止カバ取付作業があった。これらの作業は
時間がかかり、作業者の被爆の大きな要因となっていた
。また、ノズル角度が炉壁に対して直角であり、噴射さ
れた高圧ジェット水が炉壁にはげしくあたり、霧状にな
って舞いあがりやすく、洗浄してはがされたクラッドが
ミストとともに、舞いあがり他の場所へ付着するという
除染効果上の問題があった。However, when installing on the upper surface of the flange of the reactor pressure vessel, many operations are performed by one worker on the bulkhead plate. For example, centering work for reactor pressure vessels and equipment,
There was work to install a cover to prevent mist scattering. These tasks were time-consuming and were a major cause of radiation exposure for workers. In addition, the nozzle angle is perpendicular to the furnace wall, and the injected high-pressure jet water hits the furnace wall hard and tends to fly up in the form of mist. There was a problem with decontamination effectiveness that it adhered to places.
本発明の目的は、前記炉壁洗浄装置に遠隔機能を多数設
け、作業性向上、作業員の被爆低減をはかるとともに、
除染効果を増し、装置の信頼性を向上させた炉壁洗浄装
置を提供することにある。The purpose of the present invention is to provide the furnace wall cleaning device with a number of remote functions, improve work efficiency, reduce radiation exposure of workers, and
It is an object of the present invention to provide a furnace wall cleaning device that increases the decontamination effect and improves the reliability of the device.
高圧水噴射ノズルを水平面から下方に角度設定したこと
から、ｉｌ（ミスト）の舞いあがりが減少して、除染効
果が向上し、ミスト飛散防止カバーを遠隔操作可能にし
たことから作業性向上及び作業員の被曝低減をはかるこ
とができ、大きな効果がある。The high-pressure water injection nozzle is angled downward from the horizontal plane, which reduces the amount of il (mist) flying up, improving the decontamination effect, and making it possible to remotely control the mist scattering prevention cover, which improves work efficiency and improves work efficiency. It is highly effective in reducing the radiation exposure of employees.
以下、実施例の構成及び動作の説明を第１図から第９図
により説明する。The configuration and operation of the embodiment will be explained below with reference to FIGS. 1 to 9.
第１図において、装置の構成について説明する。Referring to FIG. 1, the configuration of the device will be explained.
炉壁洗浄装置３は、装置の中央に角形チューブ４が設け
られ、その下端にノズルアーム６及び旋回駆動部７があ
る。ノズル５はノズルアーム６に２ケ設けてあり、ノズ
ル先端から高圧ジェット水を噴射させる。角形チューブ
４は昇降駆動部８により昇降し、同時にノズル５を旋回
させながら洗浄していく。The furnace wall cleaning device 3 has a rectangular tube 4 provided at the center thereof, and a nozzle arm 6 and a rotation drive section 7 at its lower end. Two nozzles 5 are provided on a nozzle arm 6, and high-pressure jet water is jetted from the nozzle tip. The rectangular tube 4 is raised and lowered by the raising and lowering drive unit 8, and at the same time, the nozzle 5 is rotated for cleaning.
第２図において、装置全体を保持するフレーム１２、ミ
スト飛散防止カバー１３が設けられている。In FIG. 2, a frame 12 that holds the entire device and a mist scattering prevention cover 13 are provided.
第１、第２図及び第７図、第８図により、装置の設置方
法について説明する。The installation method of the apparatus will be explained with reference to FIGS. 1, 2, 7, and 8.
炉壁洗浄装置３は圧力容器１のフランジ面に設置させる
。従来の圧力容器１と装置３の芯出しは、スタッドボル
ト２で行ない、固定金具２０により固定していたが１時
間が要した。そのため、圧力容器１と装置３の芯出しは
ガイドロッド２１にて行なえるよう、ガイドロッド用案
内口１４を設けた。この方法で行なうと前記で述べた方
法より時間が大幅に短縮する。The furnace wall cleaning device 3 is installed on the flange surface of the pressure vessel 1. Conventionally, centering of the pressure vessel 1 and the device 3 was performed using stud bolts 2 and fixed using fixing fittings 20, but it took one hour. Therefore, a guide rod guide port 14 is provided so that the pressure vessel 1 and the device 3 can be centered using the guide rod 21. This method takes much less time than the method described above.
第３図、第８図により、ノズル角度について説明する。The nozzle angle will be explained with reference to FIGS. 3 and 8.
従来は第８図に示すように炉壁面に対して直角であった
。前記で述べた角度であると、高圧ジェット水が炉壁に
あたり、霧状になり舞いあがりやすく、洗浄してはがさ
れたクラッドが霧といっしょに舞いあがり他の場所へ付
着してしまう。Conventionally, it was perpendicular to the furnace wall as shown in FIG. At the above-mentioned angle, the high-pressure jet water hits the furnace wall, becomes a mist, and tends to fly up, and the cleaned and peeled cladding flies up with the mist and attaches to other places.
そのため、第３図に示すようにノズル５に角度を下向に
することにより、霧の舞いあがりが少なくなり、除染効
果も向上する。Therefore, by making the nozzle 5 angle downward as shown in FIG. 3, the amount of mist flying up is reduced and the decontamination effect is improved.
第５図、第６図及び第９図により汚線防止方法について
説明する。A method for preventing dirty lines will be explained with reference to FIGS. 5, 6, and 9.
従来、第９図に示すようにミスト飛散防止カバー１９を
圧力容器１をカバーしていた。このミスト飛散防止カバ
ー１９は鉄板であるため、据付は天井クレーンにて行な
っており時間が要し、作業員がバルクヘッドプレート上
に降りている時間が長いため、被曝が多かった。そのた
め、第５図、第６図に示すように、ミスト飛散防止カバ
１２をナイロンシートカバーにし、軽量化を計り、作業
者１５がバルクヘッドプレート上まで降りていかなくて
も操作ロープ２２にて遠隔で開閉できるようにした。Conventionally, the pressure vessel 1 has been covered with a mist scattering prevention cover 19 as shown in FIG. Since the mist scattering prevention cover 19 is made of a steel plate, installation is done using an overhead crane, which takes time, and the workers are exposed to radiation because they spend a long time on the bulkhead plate. Therefore, as shown in FIGS. 5 and 6, the mist scattering prevention cover 12 is made of a nylon seat cover to reduce the weight. It can be opened and closed remotely.
また、ミスト飛散防止カバー１２を開いた時、開状態を
保持できるようロック１６を設ける。Furthermore, a lock 16 is provided to keep the mist scattering prevention cover 12 open when it is opened.
第４図は旋回駆動部を示す。従来、旋回駆動部は圧力容
器１に水が入っている状態では、防水構造でなかったた
め、据付不可能であった。FIG. 4 shows the swing drive section. Conventionally, the swing drive unit could not be installed when the pressure vessel 1 was filled with water because it did not have a waterproof structure.
圧力容器１が満水状態でないと、圧力容器１内からの線
量が多いため、作業員の被曝が多い。If the pressure vessel 1 is not filled with water, the radiation dose from inside the pressure vessel 1 will be large, and the workers will be exposed to a large amount of radiation.
そのため、圧力容器１が満水状態でも据付できるよう、
旋回駆動部９を防水構造にした。Therefore, so that the pressure vessel 1 can be installed even when it is full of water,
The swing drive unit 9 has a waterproof structure.
本実施例によれば、作業性向上、作業員の被曝低減をは
かれるとともに、汚染拡大防止に大きな効果がある。According to this embodiment, it is possible to improve work efficiency, reduce radiation exposure of workers, and have a great effect on preventing the spread of contamination.
〔発明の効果〕
本発明によれば、バルクヘッドプレート上での作業時間
が従来よりも１／３に短縮でき、被曝線量も１／２に低
減できるため大きな効果がある。[Effects of the Invention] According to the present invention, the time required to work on the bulkhead plate can be reduced to 1/3 compared to the conventional method, and the exposure dose can also be reduced to 1/2, resulting in great effects.
第１図は本発明による炉壁洗浄装置全体図、第２図は本
発明による炉壁洗浄装置平面図、第３図は本発明による
ノズル部を示す図、第４図は本発明による防水構造の旋
回駆動部を示す図、第５図は本発明によるミスト飛散防
止カバ一作業説明図、第６図はミスト飛散防止カバ詳細
図、第７図は従来の炉壁洗浄装置全体図、第８図は従来
のノズル部を示す図、第９図は従来の炉壁洗浄装置平面
図である。
１・・・圧力容器、２・・スタッドボルト、３・・・炉
壁洗浄装置、４・・・角形チューブ、５・・・ノズル、
６・・・ノズルアーム、７・・・旋回駆動部、８・・・
昇降駆動部、９・・吊り具、１０・・・水圧ホース、１
１・・・手摺、１２・・・フレーム、１３・・・ミスト
飛散防止カバー、１４・・・ガイドロッド用案内口、１
５・・・作業員、１６・・・ロック機構、１７・・・従
来の炉壁洗浄装置、１８・・・従来のノズル、１９・・
・従来のミスト飛散防止力、＜−１２０・・・固定金具
、２１・・・ガイドロッド、２２・・・操作ロープ。FIG. 1 is an overall view of the furnace wall cleaning device according to the present invention, FIG. 2 is a plan view of the furnace wall cleaning device according to the present invention, FIG. 3 is a diagram showing the nozzle part according to the present invention, and FIG. 4 is a waterproof structure according to the present invention. FIG. 5 is an explanatory diagram of the operation of the mist scattering prevention cover according to the present invention, FIG. 6 is a detailed view of the mist scattering prevention cover, FIG. 7 is an overall view of the conventional furnace wall cleaning device, and FIG. The figure shows a conventional nozzle part, and FIG. 9 is a plan view of a conventional furnace wall cleaning device. 1... Pressure vessel, 2... Stud bolt, 3... Furnace wall cleaning device, 4... Square tube, 5... Nozzle,
6... Nozzle arm, 7... Swivel drive unit, 8...
Lifting drive unit, 9... Hanging tool, 10... Water pressure hose, 1
DESCRIPTION OF SYMBOLS 1... Handrail, 12... Frame, 13... Mist scattering prevention cover, 14... Guide rod guide port, 1
5... Worker, 16... Lock mechanism, 17... Conventional furnace wall cleaning device, 18... Conventional nozzle, 19...
- Conventional mist scattering prevention force, <-120...Fixing metal fittings, 21...Guide rod, 22...Operation rope.
Claims (1)
ジ面に設置させ、高圧ジェット水用ノズルを上下させる
駆動機構及び旋回させる駆動機構を備えたものにおいて
、高圧ジェット水噴射方向を水平面より下方に角度設定
したことを特徴とする炉壁洗浄装置。 ２、特許請求の範囲第１項において、ミスト飛散防止カ
バーを遠隔操作にて開閉できることを特徴とする炉壁洗
浄装置。 ３、特許請求の範囲第２項において、ミスト飛散防止カ
バーに軽量のナイロンシートカバーを採用したことを特
徴とする炉壁洗浄装置。 ４、特許請求の範囲第１項において、旋回駆動部を防止
構造にしたことを特徴とする炉壁洗浄装置。[Scope of Claims] 1. A cleaning device, the cleaning device being installed on the flange surface of a reactor pressure vessel, and comprising a drive mechanism for moving a high-pressure jet water nozzle up and down and a drive mechanism for rotating it, A furnace wall cleaning device characterized in that the injection direction is set at an angle below the horizontal plane. 2. A furnace wall cleaning device according to claim 1, characterized in that the mist scattering prevention cover can be opened and closed by remote control. 3. A furnace wall cleaning device according to claim 2, characterized in that a lightweight nylon sheet cover is used as the mist scattering prevention cover. 4. A furnace wall cleaning device according to claim 1, characterized in that the rotation drive section has a prevention structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20654785A JPS6267499A (en) | 1985-09-20 | 1985-09-20 | Washer for reactor wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20654785A JPS6267499A (en) | 1985-09-20 | 1985-09-20 | Washer for reactor wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6267499A true JPS6267499A (en) | 1987-03-27 |
Family
ID=16525188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20654785A Pending JPS6267499A (en) | 1985-09-20 | 1985-09-20 | Washer for reactor wall |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6267499A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2783567B2 (en) * | 1987-08-27 | 1998-08-06 | 大日本印刷株式会社 | Thermal copy base paper |
-
1985
- 1985-09-20 JP JP20654785A patent/JPS6267499A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2783567B2 (en) * | 1987-08-27 | 1998-08-06 | 大日本印刷株式会社 | Thermal copy base paper |
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