JPH01184500A - Device for cutting high-radioactivity solid waste - Google Patents
Device for cutting high-radioactivity solid wasteInfo
- Publication number
- JPH01184500A JPH01184500A JP695288A JP695288A JPH01184500A JP H01184500 A JPH01184500 A JP H01184500A JP 695288 A JP695288 A JP 695288A JP 695288 A JP695288 A JP 695288A JP H01184500 A JPH01184500 A JP H01184500A
- Authority
- JP
- Japan
- Prior art keywords
- base material
- water
- cutting
- solid waste
- plasma
- 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
- 238000005520 cutting process Methods 0.000 title claims abstract description 53
- 239000002910 solid waste Substances 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 230000002285 radioactive effect Effects 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 abstract description 27
- 239000007789 gas Substances 0.000 abstract description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 229910052786 argon Inorganic materials 0.000 abstract description 3
- 239000011261 inert gas Substances 0.000 abstract description 2
- 238000003795 desorption Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 239000010953 base metal Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 101100008046 Caenorhabditis elegans cut-2 gene Proteins 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発嬰は、水中プラズマ切断技術に係り、特に高放射性
固体廃棄物の切断に好適な切断装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to underwater plasma cutting technology, and particularly to a cutting device suitable for cutting highly radioactive solid waste.
従来の高放射性固体廃棄物切断装置に用いられている切
断技術としては１例えば、特願昭５８−６０８１４号に
記載されているように、ｒ消耗電極式アーク切断法」
（特許第１１５４６０４号）を応用したものが公知であ
る。Cutting techniques used in conventional highly radioactive solid waste cutting equipment include the consumable electrode arc cutting method, as described in Japanese Patent Application No. 58-60814.
(Patent No. 1154604) is well known.
上記公知の切断技術は、ソリッドワイヤ等を電極とする
消耗電極式アーク切断法の改良として。The above-mentioned known cutting technique is an improvement of the consumable electrode type arc cutting method using a solid wire or the like as an electrode.
ワイヤ電極のコンタクトチップの外側に水噴射用ノズル
を設け、該ノズルから高圧水を噴射して。A water spray nozzle is provided outside the contact tip of the wire electrode, and high pressure water is sprayed from the nozzle.
アーク熱により溶融した被切断材料（以下、母材と言う
）を吹き飛ばす切断法である。This is a cutting method in which the material to be cut (hereinafter referred to as base material) that has been melted by arc heat is blown away.
しかし、上記公知の切断法は、母材と、電極であるワイ
ヤとの間に電位差をもたせ、この間でアークを発生させ
るため、母材が導電体であることが条件となる。However, in the above-mentioned known cutting method, a potential difference is created between the base material and the wire serving as an electrode, and an arc is generated therebetween, so that the base material must be a conductor.
ところが、この切断装置の切断対象となる高放射性固体
廃棄物には、原子炉施設内での使用に伴って母材表面に
セラミックス状の非導電性酸化膜が形成されるものがあ
り、アークが安定しないという問題がある。また、高放
射性固体廃棄物を貯蔵するプールの水は、純水に近い品
質が要求されるが、本切断法の場合、電極であるワイヤ
が母材とともに溶融されるため、ドロス（溶融金属粒）
が多量に発生してプール水を汚染する虞れが有るため、
大掛りな水浄化装置が必要となるという問題もある。However, some of the highly radioactive solid wastes that are cut by this cutting device have a ceramic-like non-conductive oxide film formed on the surface of the base material due to use in nuclear reactor facilities, which can cause arcing. The problem is that it is not stable. In addition, water in pools that store highly radioactive solid waste is required to have a quality close to that of pure water, but with this cutting method, the wire that is the electrode is melted together with the base material, so dross (molten metal particles) )
There is a risk that a large amount of water will be generated and contaminate the pool water.
Another problem is that a large-scale water purification device is required.
これに対し、プラズマ切断法は、同じくアークを発生さ
せる技術であるが、母材との間に電位差をもたせないで
もアークを発生する非移行式プラズマ（プラズマジェッ
トとも言う）や、厚肉の母材にも適用できる移行式プラ
ズマ等があり、これらの非移行式プラズマ切断法や移行
式プラズマ切断法は比較的、水中切断に適用し易い。On the other hand, plasma cutting is a technology that also generates an arc, but it uses non-transfer plasma (also called plasma jet), which generates an arc without creating a potential difference between the base metal and the base metal, and There are transfer type plasma cutting methods that can also be applied to materials, and these non-transfer type plasma cutting methods and transfer type plasma cutting methods are relatively easy to apply to underwater cutting.
しかしながら、プラズマアークの発生形態は、電極間に
生じたアークに対してアルゴンガス等の動作ガスを供給
し、これをプラズマガス流として噴出し、母材を溶融、
さらに吹き飛ばすものである。−
このため、水中で切断を必要とする高放射性固体廃棄物
にプラズマ切断を用いた場合、前記プラズマガス流が、
水圧により噴出エネルギを抑制され、溶融した母材の排
除能力が低下し、ドロスが付着したり、切断部後方で再
び融合するなどの現象を生じるという欠点がある。However, the generation form of plasma arc is such that a working gas such as argon gas is supplied to the arc generated between the electrodes, and this is ejected as a plasma gas flow to melt the base material.
It blows away even more. - For this reason, when plasma cutting is used for highly radioactive solid waste that requires cutting underwater, the plasma gas flow
There are disadvantages in that the ejection energy is suppressed by the water pressure, reducing the ability to remove the molten base material, causing phenomena such as dross adhering and re-fusion at the rear of the cut section.
本発明は上述の事情に鑑みて為されたもので、切断によ
って発生するドロスが被溶断物に付着する虞れが無く、
良質の切断が可能な高放射性固体廃棄物切断装置を提供
することを目的とする。The present invention has been made in view of the above-mentioned circumstances, and there is no risk that dross generated by cutting will adhere to the object to be cut.
The purpose of the present invention is to provide a highly radioactive solid waste cutting device capable of high-quality cutting.
上記目的は、発生するドロスを強制的に除去し、又は、
溶融した母材の排除能力を促進することにより達成され
る。The above purpose is to forcibly remove the generated dross, or
This is achieved by promoting the ability to displace the molten matrix.
本発明では、後者の排除能力を促進する方法を採用し、
プラズマアークにより母材の溶断部に水を噴射可能なノ
゛ズルを配設した。The present invention adopts a method that promotes the latter elimination ability,
A nozzle that can spray water onto the welded part of the base metal using a plasma arc was installed.
尚、プラズマ切断機にノズルを配設する技術としては、
実開昭６２−１０９８６２に記載のプラズマ切断装置で
提案されている。In addition, the technology for arranging the nozzle in a plasma cutting machine is as follows:
A plasma cutting device is proposed in Utility Model Application Publication No. 62-109862.
しかし、上記技術は気中におけるプラズマ切断において
、付着ドロスを減少せしめること、及び発生するヒユー
ム内の微粒子の捕集を容易とすることを目的として、配
設したノズルから気体、または、容易に気化する液体を
噴出するものであるのに比し１本発明は液体の水を噴出
するものであって、その技術的思想を全く異にする。However, in plasma cutting in air, the above technology aims to reduce the amount of attached dross and to facilitate the collection of fine particles in the generated fume. However, the present invention jets out liquid water, and its technical concept is completely different.
また、上記の公知技術（実開昭６２−１０９８６２）を
水中切断に適用した場合は、ノズルから噴射された気体
が水圧の影響を受けながら気泡となって浮上するため、
溶融母材の排除性向上は期待できないという問題も考え
られる。In addition, when the above-mentioned known technology (Utility Model Application Publication No. 62-109862) is applied to underwater cutting, the gas injected from the nozzle becomes bubbles and floats under the influence of water pressure.
Another problem is that it cannot be expected to improve the removal of the molten base material.
前述した本発明に係る解決手段の如く、水中で水を噴注
するノズルを水中プラズマ切断機に設けると、水中での
プラズマアーク切断においても、噴射エネルギを著しく
損失することはない。また、切断水深の増加に伴う外圧
増大に対しても、噴射水圧を高めることにより容易に対
応が可能であり、効率的なドロス及び溶融母材の排除性
効果を得ることができる。When an underwater plasma cutting machine is provided with a nozzle that injects water underwater, as in the above-mentioned solution according to the present invention, there is no significant loss of injection energy even in underwater plasma arc cutting. In addition, an increase in external pressure due to an increase in cutting water depth can be easily coped with by increasing the jetting water pressure, and an efficient effect on removing dross and molten base material can be obtained.
〔実施例〕 第１図は第１の実施例を示す説明図である。〔Example〕 FIG. 1 is an explanatory diagram showing a first embodiment.
高放射性固体廃棄物等の被切断材２（以下、母材２と云
う）を水槽（または、貯蔵プール）４の水面下で切断す
る水中プラズマトーチ１（以下トーチ１と云う）で切断
する状態を示している。トーチ１と母材２との間で生じ
たアークは動作ガスとして供給されるアルゴンガス等の
不活性ガスの噴出によりプラズマアーク３となって噴出
する。A state in which a material to be cut 2 (hereinafter referred to as base material 2) such as highly radioactive solid waste is cut with an underwater plasma torch 1 (hereinafter referred to as torch 1) that cuts under the water surface of a water tank (or storage pool) 4. It shows. The arc generated between the torch 1 and the base material 2 is ejected as a plasma arc 3 by ejection of an inert gas such as argon gas supplied as a working gas.
これにより、母材２はプラズマアーク３の熱エネルギに
よって溶融し、溶融した母材はドロス５となって母材２
よりからする。ここで、水を噴射可能なノズル６（以下
、ジェット水ノズル６という）をトーチ１の近傍に配設
し、ジェット水７をノズル６から母材２の溶断部に噴射
することによりドロス５の脱離（または、排除）を促進
することになり、良質な切断形状が得られる。As a result, the base metal 2 is melted by the thermal energy of the plasma arc 3, and the molten base metal becomes dross 5 and the base metal 2
Tighten. Here, a nozzle 6 capable of injecting water (hereinafter referred to as jet water nozzle 6) is disposed near the torch 1, and jet water 7 is injected from the nozzle 6 to the melted part of the base material 2, thereby removing the dross 5. This promotes detachment (or elimination) and provides a high-quality cut shape.
第２図は第２の実施例を示す断面図である。この第２の
実施例は、第１の実施例の応用例として、ジェット水ノ
ズル６をトーチ１に一体形に組込んだ構成である。ジェ
ット水ノズル６ａはトーチ１′の外周部に組込まれ、ジ
ェット水供給装置２０から供給されたジェット水７を母
材２へ噴射するものである。FIG. 2 is a sectional view showing the second embodiment. This second embodiment is an application of the first embodiment, and has a structure in which a jet water nozzle 6 is integrated into the torch 1. The jet water nozzle 6a is incorporated into the outer circumferential portion of the torch 1', and is used to spray jet water 7 supplied from the jet water supply device 20 onto the base material 2.
尚１本発明者らの実験によれば、ジェット水７の噴射方
向については、切断作業の進行方向Ａに関して、トーチ
１の後方から噴射すると、プラズマアーク３の乱れ等を
生じさせず、また、ドロス５の効率的な除去が行えるこ
とを確認している。According to the experiments conducted by the present inventors, when the jet water 7 is jetted from behind the torch 1 in the cutting operation direction A, the plasma arc 3 is not disturbed. It has been confirmed that dross 5 can be efficiently removed.
さらに、ジェット水７の母材２への噴射位置、距離及び
ジェット水圧力、流量についても、切断する母材２の厚
さ１発生するプラズマアーク３の能力及び切断速度等に
より、適正に設定する必要があることも確認している０
本発明方法を実施する際、これら諸元は実験的に容易に
適正値を求め得る。Furthermore, the injection position, distance, jet water pressure, and flow rate of the jet water 7 to the base material 2 are set appropriately depending on the thickness of the base material 2 to be cut, the ability of the generated plasma arc 3, the cutting speed, etc. I have also confirmed that it is necessary0
When carrying out the method of the present invention, appropriate values for these specifications can be easily determined experimentally.
第３図は第３の実施例を示す説明図である０本実施例は
、ジェット水７の噴射位置をジェット水ノズルの首振り
及び伸縮によって調節可能ならしめると共に、ジェット
水７の圧力、流量を調整前能ならしめたものである。FIG. 3 is an explanatory diagram showing the third embodiment. In this embodiment, the injection position of the jet water 7 can be adjusted by swinging and expanding and contracting the jet water nozzle, and the pressure and flow rate of the jet water 7 can be adjusted. This is the pre-adjusted ability.
トーチ１＃に保持具８を介して配設されたジェット水ノ
ズル６′の先端は、往復矢印Ｃの方向に伸縮可能な伸縮
ノズル６ｂを備えており、該伸縮ノズル６ｂは、ロータ
リージヨイント９により往復円弧矢印Ｂの方向に首振り
可能となっている。The tip of the jet water nozzle 6' disposed on the torch 1# via the holder 8 is equipped with a telescopic nozzle 6b that can be extended and contracted in the direction of the reciprocating arrow C. This allows it to swing in the direction of the reciprocating circular arc arrow B.
また、ジェット水７はジェット水供給装置！２０から供
給され、圧力調整弁２１及び流量調整弁２２によって適
正な値に調整される。Also, jet water 7 is a jet water supply device! 20 and is adjusted to an appropriate value by a pressure regulating valve 21 and a flow regulating valve 22.
本実施例（第３図）によれば、切断する母材の厚さや、
切断速度等の条件が変っても、一つの装置システムで自
在に調整対応することが可能となり、種々様々な形状の
高放射性固体廃棄物を良品に切断することが可能となる
。According to this embodiment (Fig. 3), the thickness of the base material to be cut,
Even if conditions such as cutting speed change, it will be possible to adjust the cutting speed and other conditions freely with one device system, making it possible to cut highly radioactive solid waste of various shapes into good quality products.
〔発明の効果〕
本発明によれば、水中で取扱を必要とする高放射性固体
廃棄物の切断にプラズマ切断機を適用することが容易と
なり、水中プラズマ切断時のプラズマガス流によるドロ
ス排除能力の低下に対し、ジェット水により該ドロスを
強制排除できるので、良質な切断結果が得られ、切断性
能の向上が図れるという効果がある。[Effects of the Invention] According to the present invention, it is easy to apply a plasma cutting machine to cutting highly radioactive solid waste that requires handling underwater, and the dross removal ability of the plasma gas flow during underwater plasma cutting can be improved. Since the dross can be forcibly removed by jet water, good quality cutting results can be obtained and cutting performance can be improved.
尚、本発明者らの実験においては、ある同一切断条件に
おける本発明の使用と非使用時の性能比較として１例え
ば、切断速度の比較で見れば、非使用時に比し使用時に
は２〜３倍の切断速度でも、同等以上の切断品質を得ら
れることが確認されている。In addition, in the experiments conducted by the present inventors, the performance of the present invention was compared when the present invention was used and when it was not used under the same cutting conditions.For example, when looking at the comparison of cutting speed, when the present invention was used it was 2 to 3 times faster than when it was not used. It has been confirmed that the same or higher cutting quality can be obtained even at a cutting speed of .
第１図は、本発明の第１の実施例を示すもので。
トーチ近傍にジェット水ノズルを配設した基本構成を示
す説明図である。
第２図は１本発明の第２の実施例を示すもので。
ジェット水ノズルをトーチ１に対して一体形に組込んだ
構成を示す断面図である。
第３図は、本発明の第３の実施例を示すもので。
ジェット水の噴射位置及び圧力、流量の調整を可能とす
る構成を示す断面図である。
１・・・トーチ、２・・・母材、５・・・ドロス、６・
・・ジェット水ノズル、７・・・ジェット水、２ｏ・・
・ジェット水供給装置。FIG. 1 shows a first embodiment of the present invention. FIG. 2 is an explanatory diagram showing a basic configuration in which a jet water nozzle is arranged near a torch. FIG. 2 shows a second embodiment of the present invention. FIG. 2 is a cross-sectional view showing a structure in which a jet water nozzle is integrated into a torch 1. FIG. 3 shows a third embodiment of the present invention. FIG. 2 is a cross-sectional view showing a configuration that allows adjustment of the jet water injection position, pressure, and flow rate. 1... Torch, 2... Base material, 5... Dross, 6...
...Jet water nozzle, 7...Jet water, 2o...
・Jet water supply device.
Claims (1)
ラズマアーク切断機と、 （ｂ）上記被切断物の溶断部に向けて水を噴射するノズ
ルと、 （ｃ）上記の水噴射ノズルに高圧水を供給する手段と、 を設けたことを特徴とする、高放射性固体廃棄物切断装
置。 ２、前記水噴射ノズルの外筐体とは、前記プラズマアー
ク切断機のトーチの外筐体と一体に連設されたものであ
ることを特徴とする、特許請求の範囲第１項に記載の高
放射性固体廃棄物切断装置。 ３、前記の水射射ノズルは、その噴射方向を自在に調節
し得る構造であり、かつ、該水噴射ノズルを溶断部に対
して接近・離間せしめ得る構造であることを特徴とする
、特許請求の範囲第１項に記載の高放射性固体廃棄物切
断装置。 ４、前記の高圧水供給手段は、高圧供給水の圧力を調整
する弁手段、及び、流量を調整する弁手段を備えたもの
であることを特徴とする、特許請求の範囲第３項に記載
の高放射性固体廃棄物切断装置。[Scope of Claims] 1. (a) a plasma arc cutting machine installed in a water tank capable of storing an object to be cut; (b) a nozzle that injects water toward the fusing portion of the object to be cut; (c) A means for supplying high-pressure water to the water injection nozzle, and a highly radioactive solid waste cutting device. 2. The outer casing of the water injection nozzle is integrally connected to the outer casing of the torch of the plasma arc cutting machine, as set forth in claim 1. Highly radioactive solid waste cutting equipment. 3. The above-mentioned water injection nozzle has a structure that allows the injection direction to be freely adjusted, and a structure that allows the water injection nozzle to approach and move away from the fusing part. A highly radioactive solid waste cutting device according to claim 1. 4. According to claim 3, the high-pressure water supply means includes a valve means for adjusting the pressure of the high-pressure water supply and a valve means for adjusting the flow rate. Highly radioactive solid waste cutting equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63006952A JP2583263B2 (en) | 1988-01-18 | 1988-01-18 | Highly radioactive solid waste cutting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63006952A JP2583263B2 (en) | 1988-01-18 | 1988-01-18 | Highly radioactive solid waste cutting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01184500A true JPH01184500A (en) | 1989-07-24 |
| JP2583263B2 JP2583263B2 (en) | 1997-02-19 |
Family
ID=11652563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63006952A Expired - Lifetime JP2583263B2 (en) | 1988-01-18 | 1988-01-18 | Highly radioactive solid waste cutting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2583263B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10260298A (en) * | 1997-03-17 | 1998-09-29 | Mitsubishi Heavy Ind Ltd | Underwater cutting method and device |
| JP2016191600A (en) * | 2015-03-31 | 2016-11-10 | 株式会社Ihi | Ventilation system in fuel debris recovery, and ventilation method in fuel debris recovery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58168998A (en) * | 1982-03-31 | 1983-10-05 | 株式会社日立製作所 | Method of decontaminating radioactive metal waste |
| JPS5964165A (en) * | 1982-10-04 | 1984-04-12 | Kawasaki Heavy Ind Ltd | Underwater plasma cutting method |
-
1988
- 1988-01-18 JP JP63006952A patent/JP2583263B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58168998A (en) * | 1982-03-31 | 1983-10-05 | 株式会社日立製作所 | Method of decontaminating radioactive metal waste |
| JPS5964165A (en) * | 1982-10-04 | 1984-04-12 | Kawasaki Heavy Ind Ltd | Underwater plasma cutting method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10260298A (en) * | 1997-03-17 | 1998-09-29 | Mitsubishi Heavy Ind Ltd | Underwater cutting method and device |
| JP2016191600A (en) * | 2015-03-31 | 2016-11-10 | 株式会社Ihi | Ventilation system in fuel debris recovery, and ventilation method in fuel debris recovery |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2583263B2 (en) | 1997-02-19 |
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