JPS632563A - Cutting method for high radiative solid refuse - Google Patents
Cutting method for high radiative solid refuseInfo
- Publication number
- JPS632563A JPS632563A JP14303286A JP14303286A JPS632563A JP S632563 A JPS632563 A JP S632563A JP 14303286 A JP14303286 A JP 14303286A JP 14303286 A JP14303286 A JP 14303286A JP S632563 A JPS632563 A JP S632563A
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- cut
- transfer type
- type plasma
- cutting method
- 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
Links
- 238000000034 method Methods 0.000 title claims description 16
- 239000007787 solid Substances 0.000 title 1
- 239000000463 material Substances 0.000 claims abstract description 28
- 230000002285 radioactive effect Effects 0.000 claims description 7
- 239000002910 solid waste Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract 1
- 210000002381 plasma Anatomy 0.000 description 35
- 239000007789 gas Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000000126 substance Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 101100008044 Caenorhabditis elegans cut-1 gene Proteins 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は例えば原子力発電所から発生する高放射性固体
廃棄物の切断法に係り、特に各種電気的及び機械的物流
をもった表面皮膜が付着した金属材料の効率的な水中切
断を行う方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for cutting highly radioactive solid waste generated, for example, from nuclear power plants, and in particular, it relates to a method for cutting highly radioactive solid waste generated, for example, from nuclear power plants. The present invention relates to a method for efficiently cutting metal materials underwater.
従来の切断法は、特願昭５８−６０８１４に記載のよう
に被切断材と切断トーチ間に電位差をもたせ、この間に
アークを発生させてその熱エネルギで被切断材を溶融切
断するものであった。しかし。In the conventional cutting method, as described in Japanese Patent Application No. 58-60814, a potential difference is created between the material to be cut and a cutting torch, an arc is generated between the two, and the material is melted and cut using the thermal energy. Ta. but.
そのためには被切断材が導電体であることが切断条件の
基本であり、例えばセラミックスのような非導電体の切
断は不可能で１本法の切断対象となる廃棄物の表面には
、使用期間が長ければ長いほど表面にセラミック状の物
質が付着している。For this purpose, the basic cutting condition is that the material to be cut is a conductor.For example, it is impossible to cut non-conductors such as ceramics, and the surface of the waste that is the target of cutting with the single method cannot be used. The longer the period, the more ceramic-like substances will adhere to the surface.
上記従来技術は、被切断材の表面に非導電性物質が付着
する点について配慮がされておらず、プラズマトーチと
被切断材との間にアークが発生しづらく、安定した切断
ができない問題があった。The above conventional technology does not take into consideration the fact that non-conductive substances may adhere to the surface of the material to be cut, and there is a problem in that it is difficult to generate an arc between the plasma torch and the material to be cut, making stable cutting impossible. there were.
従来の方法ではこの対策として、表面の付着物を機械的
に除去後プラズマ切断をするなどの方法で対応している
が、作業時間がかかり手順が複雑で作業効率が悪く、こ
の改善が強く望まれている。Conventional methods deal with this problem by mechanically removing the deposits on the surface and then using plasma cutting, but this takes time and requires complicated procedures, resulting in poor work efficiency, so improvements in this approach are strongly desired. It is rare.
本発明の目的は、このような被切断材の表面の電気的或
は機械的物性に全く影響を受けず、水中で安定したｖＪ
断性能？有する切断法を従供することにおる。The object of the present invention is to achieve stable vJ in water without being affected by the electrical or mechanical properties of the surface of the material to be cut.
Breaking performance? We will provide cutting methods that have the following characteristics.
上記目的は、切断法として移行式と非移行式プラズマジ
ェットを併用することにより、達成される。−般にプラ
ズマアーク切断は移行式であり、プラズマトーチと被切
断材の間に電源を接続し電位差を設けかつトーチのノズ
ル孔から動作ガスを流出してアークを発生させて、この
熱エネルギと噴出ガスの力で浴融切断するものである。The above object is achieved by using both a transfer type and a non-transfer type plasma jet as a cutting method. - In general, plasma arc cutting is a transfer type, in which a power source is connected between the plasma torch and the material to be cut to create a potential difference, and working gas flows out from the nozzle hole of the torch to generate an arc, and this thermal energy is transferred. It performs bath melt cutting using the force of ejected gas.
熱エネルギが大きいことから厚板の切断に適した方法と
して最近特に、原子炉解体の基本技術として水中切断の
主流となっている。Recently, underwater cutting has become mainstream as a basic technology for nuclear reactor dismantling, especially as it is a method suitable for cutting thick plates because of its large thermal energy.
しかし、プラズマトーチと被切断材の間にアークを発生
させるため、非導電性の付着物がある金属の切断には不
適でめる。However, since an arc is generated between the plasma torch and the material to be cut, it is not suitable for cutting metals that have non-conductive deposits.
これに対し、非移行式プラズマジェット切断ではプラズ
マトーチ内の電極棒とノズルの間にアークを発生してノ
ズル孔から噴出させて溶融切断するもので１表面の影＃
を受けない。On the other hand, in non-transfer type plasma jet cutting, an arc is generated between the electrode rod and the nozzle in the plasma torch, and the arc is ejected from the nozzle hole to melt and cut.
I don't receive it.
しかし、移行式に比べて切断能力が劣ることから一般に
はあまり用いられておらず、特に水中切断に用いられた
事例は見られない。However, it is generally not used much because it has inferior cutting ability compared to the transition type, and there are no examples of it being used for underwater cutting.
前述のように、非移行式プラズマジェット切断は移行式
に比べて切断能力が劣るので、非移行式のみで厚板を切
断しようとすると、高出力のプラズマトーチ、航源設備
が必要でおり、また切断速度が遅いなど作業効率が悪く
なる。そこで、非移行式プラズマジェットは、被切断材
の表面に付着した非導電性の皮膜ｆｔ除去し４を性の内
部が露出するに充分な能力とし、主たる切断？移行式プ
ラズマアークで行なうように動作させる。As mentioned above, non-transfer type plasma jet cutting has inferior cutting ability compared to transition type, so if you try to cut thick plates only with non-transition type, you will need a high-power plasma torch and air source equipment. Furthermore, the cutting speed is slow, resulting in poor work efficiency. Therefore, the non-transfer type plasma jet has sufficient ability to remove the non-conductive film attached to the surface of the material to be cut and expose the inside of the material, and performs the main cutting. Operate as in a transferred plasma arc.
−方、水中切断において、同定した被切断材に対してプ
ラズマトーチの方を移動して切断した場合には、被切断
材の形状、切断装置の構成により切断中にプラズマトー
チの水深が変化することがある。そこで水ｉｔ例えば水
圧で検出する等の方法により検知し、切断条件（ｉｄｆ
ｉ、動作ガス流量ガス圧など）を水深に応じて′Ｕ４整
する。- On the other hand, in underwater cutting, when the plasma torch is moved to cut the identified material to be cut, the water depth of the plasma torch changes during cutting depending on the shape of the material to be cut and the configuration of the cutting device. Sometimes. Therefore, water is detected by a method such as water pressure detection, and the cutting conditions (idf
i, operating gas flow rate, gas pressure, etc.) are adjusted according to the water depth.
以下１本発明の一実施例を第、１図により説明する。プ
ラズマトーチの先端部は図示のように通常タングステン
の電極棒６と水冷銅製のノズル７で構成され、ノズル孔
より動作ガスがガス調整器８を、経由して供給される。An embodiment of the present invention will be explained below with reference to FIG. As shown in the figure, the tip of the plasma torch is usually composed of an electrode rod 6 made of tungsten and a nozzle 7 made of water-cooled copper, and operating gas is supplied from the nozzle hole via a gas regulator 8.
ガスの成分としてはアルゴン等の不活性ガスの他、水素
、窒素、空気或はこれらの混合ガス等が使用される。非
移行式プラズマトーチ２では、電極棒６とノズル７の間
に直流電源装置４′ｆ、接伏して非移行式のプラズマジ
ェットを発生させて被切断材１０表面皮膜を除去するも
ので、移行式プラズマトーチ３では、電極棒６と被切断
材１０間に直流電源装置５を接続して移行式プラズマア
ークを発生させて、表面皮膜除去後の被切断材１を溶倣
切断することができる。As the gas component, in addition to an inert gas such as argon, hydrogen, nitrogen, air, or a mixed gas thereof may be used. In the non-transfer type plasma torch 2, a DC power supply device 4'f is placed between the electrode rod 6 and the nozzle 7 to generate a non-transfer type plasma jet to remove the surface film of the workpiece 10. In the type plasma torch 3, a DC power supply device 5 is connected between the electrode rod 6 and the material to be cut 10 to generate a transfer type plasma arc, and the material to be cut 1 after the surface film has been removed can be welded and cut. .
本図の構成には、水深検知器９が設置されており、制御
装置１０から各々の電源４，５及びガス調整器８に対し
て指令信号を送ることにより、水圧の変化に応じた切断
条件をＩ１１御することが可能である。In the configuration shown in this figure, a water depth detector 9 is installed, and by sending command signals from a control device 10 to each power source 4, 5 and gas regulator 8, cutting conditions can be set according to changes in water pressure. It is possible to control I11.
他の実施例を第２図により説明する。本図の構成では１
本の併用プラズマトーチ１１に対して、各々直流電源装
置４，５ｔ−接続するもので、非移行と移行式のプラズ
マが併用して発生される。このような構成により、前述
の実施例と同様に非導電性の皮膜を有する被切断材１に
おいても、良好な水中切断が可能である。ここで、第１
図と同様に、水深による切断条件の制御も可能である。Another embodiment will be explained with reference to FIG. In the configuration shown in this figure, 1
Direct current power supplies 4 and 5t are connected to the combined plasma torch 11, respectively, and non-transfer and transfer type plasmas are generated in combination. With this configuration, it is possible to perform good underwater cutting even on the workpiece 1 having a non-conductive film as in the above-described embodiment. Here, the first
As in the figure, it is also possible to control cutting conditions based on water depth.
また、移行式プラズマアークにおいては、被切断材とト
ーチとの距離（アーク長）を−定に保持することが安定
な切断能力を確保するための条件となっているが、併用
プラズマトーチ１１においては、電極棒６とノズル７の
間に発生した非移行式プラズマジェットが噴出している
ため、移行式プラズマアークの発生が維持されやすく切
断の安定性が向上する効果もある。In addition, in the transfer type plasma arc, maintaining the distance (arc length) between the material to be cut and the torch at a constant value is a condition for ensuring stable cutting performance. Since the non-transfer type plasma jet generated between the electrode rod 6 and the nozzle 7 is ejected, the generation of the transfer type plasma arc is easily maintained and cutting stability is improved.
両実施例とも１本発明を説明する主要構成部のみを記述
したが、この他、プラズマトーチ或は被切断材の移動機
構、プラズマトーチの防水機構。In both embodiments, only the main components for explaining the present invention have been described, but in addition, there is also a mechanism for moving the plasma torch or the material to be cut, and a waterproofing mechanism for the plasma torch.
冷却機構などを有する。It has a cooling mechanism, etc.
本発明によれば、被切断材の表面に付着した非導電性物
質を非移行式プラズマジェットで除去することができる
ので移行式プラズマアークの発生が可能となり両者を併
用することでそのような皮膜を有する材料の水中切断に
おいてより厚板への適用拡大の効果がある。According to the present invention, non-conductive substances adhering to the surface of the material to be cut can be removed by a non-transfer type plasma jet, so a transfer type plasma arc can be generated, and by using both together, such a film can be removed. In underwater cutting of materials with
また、水深に応じて切断条件が自動的に調整制御できる
ので、切断能力が均一化され作業安定性向上の効果があ
る。In addition, cutting conditions can be automatically adjusted and controlled according to the water depth, making cutting performance uniform and improving work stability.
第１図は本発明の詳細な説明図、第２図は他の実施例の
説明図である。
１・・・被切断材、２・・・非移行式プラズマトーチ、
３・・・移行式プラズマトーチ、４・・・直流電源装置
、５・・・直流電源装置、６・・・電極棒、７・・・ノ
ズル、８・・・ＩＮ臂哨τう齋しテ
手続補正書（自発）
Ｌ事件の表示
昭和６１ 年特許願第 １４３０３２ 号２発明の名
称
高放射性固体廃棄物の切断法
ふ補正をする者
１ｍとの熟 特許出願人
名 称 ’５ｉｌ１株式会は 日 立 製
作所４、代 理 人
別紙
請求の範囲
１、高放射性固体廃棄物を適当な形状に切断する水中切
１１ｉＦｒ法において、非移行式プラズマジェット発生
用の電源装置及び移行式プラズマアーク発生用の電源装
置及びこｎらの電源を接続した１本或は複数本のプラズ
マトーチを用い、プラズマジェットによシ表面皮膜を除
去しながら、同時に被切断材との間に発生するプラズマ
アークにより切断分離することを特徴とする高放射性固
体廃棄物の切断法。
２、。FIG. 1 is a detailed explanatory diagram of the present invention, and FIG. 2 is an explanatory diagram of another embodiment. 1... Material to be cut, 2... Non-transfer type plasma torch,
3... Transfer type plasma torch, 4... DC power supply, 5... DC power supply, 6... Electrode rod, 7... Nozzle, 8... IN armpit guard Procedural amendment (spontaneous) Indication of L case Patent application No. 143032 of 1986 2 Title of invention Method of cutting highly radioactive solid waste Manufacturer 4, Agent Attachment Claim 1: Power supply device for non-transfer type plasma jet generation and transfer type plasma arc generation power supply device in underwater cutting 11iFr method for cutting highly radioactive solid waste into appropriate shapes. Using one or more plasma torches connected to these power sources, the surface film is removed by a plasma jet, and at the same time, the material to be cut is cut and separated by a plasma arc generated between the material and the material to be cut. A cutting method for highly radioactive solid waste characterized by 2.
Claims (1)
断法において、非移行式プラズマジェット発生用の電源
装置及び移行式プラズマアーク発生用の電源装置及びこ
れらの電源を接続した１本或は複数本のプラズマトーチ
を用い、プラズマジェットにより表面皮膜を除去しなが
ら、同時に被切断材との間に発生するプラズマアークに
より切断分離することを特徴とする高放射性固体廃棄物
切断法。1. In the underwater cutting method of cutting highly radioactive solid waste into a suitable shape, a power supply device for non-transfer type plasma jet generation, a power supply device for generation of transfer type plasma arc, and one or more power supplies connected to these power sources. A highly radioactive solid waste cutting method that uses multiple plasma torches to remove surface coatings with a plasma jet and simultaneously cut and separate the material with a plasma arc generated between the material and the material to be cut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14303286A JPS632563A (en) | 1986-06-20 | 1986-06-20 | Cutting method for high radiative solid refuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14303286A JPS632563A (en) | 1986-06-20 | 1986-06-20 | Cutting method for high radiative solid refuse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS632563A true JPS632563A (en) | 1988-01-07 |
| JPH0433541B2 JPH0433541B2 (en) | 1992-06-03 |
Family
ID=15329321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14303286A Granted JPS632563A (en) | 1986-06-20 | 1986-06-20 | Cutting method for high radiative solid refuse |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS632563A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01121334U (en) * | 1988-02-10 | 1989-08-17 | ||
| FR2638671A1 (en) * | 1988-11-10 | 1990-05-11 | Von Laue Paul Langevin Inst Ma | Device and method for cutting out irradiated components using a pressurised water jet |
| JP2020501912A (en) * | 2016-12-23 | 2020-01-23 | ニューフレイ リミテッド ライアビリティ カンパニー | Method and apparatus for joining an element to a component |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57184576A (en) * | 1981-05-07 | 1982-11-13 | Ishikawajima Harima Heavy Ind Co Ltd | Cutting method by plasma arc |
| JPS6012278A (en) * | 1983-07-01 | 1985-01-22 | Japanese National Railways<Jnr> | Cutting method of painted plate |
-
1986
- 1986-06-20 JP JP14303286A patent/JPS632563A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57184576A (en) * | 1981-05-07 | 1982-11-13 | Ishikawajima Harima Heavy Ind Co Ltd | Cutting method by plasma arc |
| JPS6012278A (en) * | 1983-07-01 | 1985-01-22 | Japanese National Railways<Jnr> | Cutting method of painted plate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01121334U (en) * | 1988-02-10 | 1989-08-17 | ||
| FR2638671A1 (en) * | 1988-11-10 | 1990-05-11 | Von Laue Paul Langevin Inst Ma | Device and method for cutting out irradiated components using a pressurised water jet |
| JP2020501912A (en) * | 2016-12-23 | 2020-01-23 | ニューフレイ リミテッド ライアビリティ カンパニー | Method and apparatus for joining an element to a component |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0433541B2 (en) | 1992-06-03 |
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