JPH0894796A - Method and device for decontaminating radioactive metal wastes - Google Patents
Method and device for decontaminating radioactive metal wastesInfo
- Publication number
- JPH0894796A JPH0894796A JP22667094A JP22667094A JPH0894796A JP H0894796 A JPH0894796 A JP H0894796A JP 22667094 A JP22667094 A JP 22667094A JP 22667094 A JP22667094 A JP 22667094A JP H0894796 A JPH0894796 A JP H0894796A
- Authority
- JP
- Japan
- Prior art keywords
- abrasive
- barrel
- radioactive metal
- wastes
- metal waste
- 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
- 239000010814 metallic waste Substances 0.000 title claims abstract description 48
- 230000002285 radioactive effect Effects 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims description 13
- 238000011109 contamination Methods 0.000 claims abstract description 27
- 238000005202 decontamination Methods 0.000 claims abstract description 21
- 230000003588 decontaminative effect Effects 0.000 claims abstract description 17
- 239000003082 abrasive agent Substances 0.000 claims description 31
- 239000000428 dust Substances 0.000 claims description 9
- 239000002699 waste material Substances 0.000 abstract description 20
- 239000000941 radioactive substance Substances 0.000 abstract description 5
- 239000002344 surface layer Substances 0.000 abstract description 5
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- 239000012857 radioactive material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002901 radioactive waste Substances 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Measurement Of Radiation (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、表面が放射性物質によ
り汚染された放射性金属廃棄物の除染方法及び装置に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for decontaminating radioactive metal waste whose surface is contaminated with radioactive substances.
【０００２】[0002]
【従来の技術】表面が放射性物質により汚染された放射
性金属廃棄物に対して研削材を圧縮空気を用いて噴射
し、表面層を削り取ることによって放射性金属廃棄物を
除染する方法は従来から知られている。ところが従来
は、例えば図５に示すように放射性金属廃棄物Ｗをコン
ベヤ21上に載せ、その表面に対してノズル22、23から研
削材を噴射していたため、除染工程中に放射性金属廃棄
物Ｗをコンベヤ21上で反転させる必要があり、しかもノ
ズル22、23を動かしながら研削材を噴射しても、放射性
金属廃棄物Ｗの表面全体を均一に除染することは容易で
はなかった。2. Description of the Related Art A method for decontaminating radioactive metal waste by spraying an abrasive with compressed air onto the radioactive metal waste whose surface is contaminated with radioactive material and scraping off the surface layer is known in the prior art. Has been. However, conventionally, as shown in FIG. 5, for example, the radioactive metal waste W is placed on the conveyor 21, and the abrasives are jetted from the nozzles 22 and 23 to the surface thereof, so that the radioactive metal waste is discharged during the decontamination process. It was necessary to reverse W on the conveyor 21, and even if the abrasives were sprayed while moving the nozzles 22 and 23, it was not easy to uniformly decontaminate the entire surface of the radioactive metal waste W.
【０００３】また図５に示すような従来の除染方法で
は、コンベヤ21にも放射性物質が付着するため、高汚染
廃棄物を処理した後に低汚染廃棄物を除染室24に入れる
と、コンベヤ21に付着している放射性物質により低汚染
廃棄物が逆に汚染されるという問題もあった。Further, in the conventional decontamination method as shown in FIG. 5, since radioactive substances also adhere to the conveyor 21, if the low-contamination waste is put into the decontamination chamber 24 after the high-contamination waste is treated, the conveyor 21 There was also a problem that low-polluted waste was contaminated by radioactive substances adhering to 21.
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記した従来
の問題点を解決し、放射性金属廃棄物の表面全体を均一
に除染することができ、また高汚染廃棄物を処理した後
に低汚染廃棄物を処理する場合にも低汚染廃棄物が逆汚
染されることのない放射性金属廃棄物の除染方法を提供
するためになされたものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, is capable of uniformly decontaminating the entire surface of radioactive metal waste, and has low pollution after treating highly polluted waste. The purpose of the present invention is to provide a decontamination method for radioactive metal waste that does not cause back pollution of low-polluting waste even when the waste is treated.
【０００５】[0005]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明の放射性金属廃棄物の除染方法は、
放射性金属廃棄物をバレルの内部に収納し、バレルを回
転させることにより放射性金属廃棄物を攪拌しながらそ
の表面に研削材を投射し、かつ高汚染研削材と低汚染研
削材とを別の経路で循環させながらドライブラスト除染
することを特徴とするものである。この場合、高汚染研
削材を低汚染研削材となるまで循環使用する方法を採用
することができる。また、本発明の放射性金属廃棄物の
除染装置は、放射性金属廃棄物を収納して回転されるバ
レルに、研削材投射機と回収された研削材の分級器とを
設けるとともに、この分級器と研削材投射機のホッパー
との間に、高汚染研削材コンベヤと低汚染研削材コンベ
ヤとからなる研削材の循環経路を設けたことを特徴とす
るものである。The method for decontaminating radioactive metal waste of the present invention, which has been made to solve the above-mentioned problems, comprises:
The radioactive metal waste is stored inside the barrel, and while rotating the barrel, the radioactive metal waste is agitated while the abrasive is projected onto the surface of the radioactive metal waste. It is characterized by decontaminating the drive last while circulating it. In this case, it is possible to employ a method of circulating and using the highly polluted abrasive until it becomes the less polluted abrasive. Further, the decontamination apparatus for radioactive metal waste according to the present invention is provided with an abrasive material projector and a classifier for the recovered abrasive material in a barrel which stores and rotates the radioactive metal waste. And a hopper of the abrasive material blasting machine, a circulation path of the abrasive material including a high-contamination abrasive material conveyor and a low-contamination abrasive material conveyor is provided.
【０００６】[0006]
【作用】本発明によれば、バレルの内部で放射性金属廃
棄物を攪拌しながらその表面に研削材投射機から研削材
を投射してドライブラスト除染を行うため、放射性金属
廃棄物の表面全体に研削材が均等に投射されることとな
り、表面全体を均一に除染することができる。しかもバ
レルの内面もまた研削材によって常に除染されるため、
バレルの内面は常に清浄に維持され、放射性金属廃棄物
が逆に汚染されるおそれはない。According to the present invention, while the radioactive metal waste is agitated inside the barrel, the abrasive is projected from the abrasive material projector to the drive blast decontamination, so that the entire surface of the radioactive metal waste is Since the abrasive is evenly projected onto the surface, the entire surface can be uniformly decontaminated. Moreover, the inner surface of the barrel is always decontaminated by the abrasive,
The inner surface of the barrel is always kept clean and there is no risk of radioactive metal waste being contaminated.
【０００７】しかも本発明においては、高汚染研削材と
低汚染研削材とを別の経路で循環させながらドライブラ
スト除染するので、高汚染研削材によって低汚染廃棄物
が逆汚染されることがない。また本発明においては、従
来の常識に反して高汚染研削材を低汚染研削材となるま
で循環使用する方法を採用することもできる。この方法
によれば、研削材を入れ替えることなく高汚染廃棄物を
十分に除染することができる。なおこの場合には、研削
材の循環経路に設けた放射能濃度検出器により研削材の
放射能濃度を監視しつつ除染を行うことが好ましい。Moreover, in the present invention, since the drive-last decontamination is performed while circulating the high-contamination abrasive and the low-contamination abrasive through separate paths, the low-contamination waste may be reversely contaminated by the high-contamination abrasive. Absent. Further, in the present invention, contrary to the conventional wisdom, it is also possible to adopt a method of circulating and using a high-contamination abrasive until it becomes a low-contamination abrasive. According to this method, highly contaminated waste can be sufficiently decontaminated without replacing the abrasive. In this case, it is preferable to carry out decontamination while monitoring the radioactivity concentration of the abrasive with a radioactivity concentration detector provided in the circulation path of the abrasive.
【０００８】[0008]
【実施例】以下に本発明を図示の実施例によって更に詳
細に説明する。図１は本発明の第１の実施例を示すもの
で、１は矢印のように回転する金属製のバレルである。
放射性金属廃棄物Ｗは金属廃棄物供給容器２からバレル
１の内部に供給され、バレル１の回転により攪拌され
る。３はバレル１に接続された研削材投射機であり、イ
ンペラー４を高速回転させてその遠心力で研削材をバレ
ル１の底部に向かって投射し、放射性金属廃棄物Ｗの表
面層を剥離して除染する。なお、バレル１は回転軸を下
方に傾斜させることにより、内容物を下方に排出するこ
とができる構造としておくことが好ましい。The present invention will be described below in more detail with reference to the illustrated embodiments. FIG. 1 shows a first embodiment of the present invention, in which reference numeral 1 denotes a metal barrel which rotates in the direction of an arrow.
The radioactive metal waste W is supplied from the metal waste supply container 2 into the barrel 1 and agitated by the rotation of the barrel 1. Reference numeral 3 denotes an abrasive material projector connected to the barrel 1. The impeller 4 is rotated at a high speed to project the abrasive material toward the bottom of the barrel 1 by its centrifugal force to peel off the surface layer of the radioactive metal waste W. Decontaminate. In addition, it is preferable that the barrel 1 has a structure capable of discharging the contents downward by inclining the rotating shaft downward.
【０００９】バレル１の下側には分級器５が設けられて
おり、投射された研削材を粒径によって分級する。そし
て微粉となった研削材をダストボックス６に収納する。
また剥離された放射性金属廃棄物Ｗの表面層も、ダスト
ボックス６に収納される。一方、所定の粒径以上の研削
材は高汚染研削材コンベヤ７または低汚染研削材コンベ
ヤ８により研削材投射機３のホッパー９に戻され、循環
使用される。このように高汚染廃棄物に対して投射され
た高汚染研削材の循環経路を低汚染研削材の循環経路か
ら分離したので、両者が入り混じることが防止される。
なお、バレル１、研削材投射機３、研削材の循環経路等
の外周は気密シールされており、ブロワ10が内部のダス
トを含んだ空気を吸引し、バグフィルタ11、HEPAフィル
タ12によってダストを濾過している。またその一部は分
級器５の分級用空気として使用されている。A classifier 5 is provided below the barrel 1 to classify the projected abrasive material according to the particle size. Then, the finely ground abrasive is stored in the dust box 6.
The surface layer of the stripped radioactive metal waste W is also stored in the dust box 6. On the other hand, the abrasive having a predetermined particle size or more is returned to the hopper 9 of the abrasive projector 3 by the high-contamination abrasive conveyor 7 or the low-contamination abrasive conveyor 8 and is recycled. Since the circulation route of the highly contaminated abrasive material projected onto the highly contaminated waste is separated from the circulation route of the low contaminated abrasive material as described above, it is possible to prevent both from entering.
In addition, the outer periphery of the barrel 1, the abrasive material projector 3, the abrasive material circulation path, etc. is hermetically sealed, and the blower 10 sucks the air containing dust, and the bag filter 11 and the HEPA filter 12 remove the dust. Filtering. A part of the air is used as classification air for the classifier 5.
【００１０】次に、上記の装置を用いた本発明の放射性
金属廃棄物の除染方法を説明する。まず、金属廃棄物供
給容器２から放射性金属廃棄物Ｗをバレル１の内部に供
給する。その表面汚染密度は例えば80Bq/cm2であり、高
汚染廃棄物に分類されるものであるとする。バレル１を
ゆるやかに回転させることにより放射性金属廃棄物Ｗを
攪拌しながら、研削材投射機３から研削材を投射し、ド
ライブラスト除染を行う。研削材は高汚染廃棄物との接
触により汚染されるため、高汚染研削材コンベヤ７を経
由して研削材投射機３のホッパー９に戻され、循環使用
される。Next, a method for decontaminating radioactive metal waste of the present invention using the above apparatus will be described. First, the radioactive metal waste W is supplied from the metal waste supply container 2 into the barrel 1. Its surface contamination density is, for example, 80 Bq / cm 2 , and is classified as highly contaminated waste. While the radioactive waste metal W is being stirred by gently rotating the barrel 1, the abrasive material is projected from the abrasive material projector 3 to perform drive last decontamination. Since the abrasive is contaminated by contact with the highly polluted waste, it is returned to the hopper 9 of the abrasive projector 3 via the highly polluted abrasive conveyor 7 and is recycled.
【００１１】このようなドライブラスト除染を所定時間
継続すると、放射性金属廃棄物Ｗの表面層は付着してい
る放射性物質とともに次第に剥離され、その表面汚損密
度は例えば４Bq/cm2程度（DF＝20) まで低下する。な
お、バレル１の内面もまた研削材の投射により除染され
るため、バレル１の表面汚染密度も放射性金属廃棄物Ｗ
と同様、例えば４Bq/cm2程度となる。When such drive blast decontamination is continued for a predetermined time, the surface layer of the radioactive metal waste W is gradually peeled off together with the attached radioactive substance, and the surface stain density is, for example, about 4 Bq / cm 2 (DF = 20). Since the inner surface of the barrel 1 is also decontaminated by the projection of the abrasive, the surface contamination density of the barrel 1 is also the radioactive metal waste W.
Similar to the above, for example, it is about 4 Bq / cm 2 .
【００１２】次に新品の研削材をホッパー９に供給し、
同様にバレル１をゆるやかに回転させながらドライブラ
スト除染を行う。このときには研削材を低汚染研削材コ
ンベヤ８を介して循環させ、再使用する。その結果、放
射性金属廃棄物Ｗの表面汚染密度は例えば0.2 Bq/cm2程
度（DF＝20) まで低下するので、バレル１から処理済み
の放射性金属廃棄物Ｗを回収容器13に取り出す。Next, a new abrasive is supplied to the hopper 9,
Similarly, the drive last decontamination is performed while gently rotating the barrel 1. At this time, the abrasive is circulated through the low-pollution abrasive conveyor 8 and reused. As a result, the surface contamination density of the radioactive metal waste W is lowered to, for example, about 0.2 Bq / cm 2 (DF = 20), and thus the treated radioactive metal waste W is taken out from the barrel 1 into the recovery container 13.
【００１３】以上に説明した第１の実施例では、高汚染
研削材と低汚染研削材とを使い分けた。これは高汚染廃
棄物に対して投射された研削材は汚染されて高汚染研削
材となり、その放射能濃度はあるレベルで飽和に達して
それ以下には低下することがないから、新しい研削材と
交換しなければならないとの従来の常識に従った方法で
ある。In the first embodiment described above, the high-contamination abrasive and the low-contamination abrasive are used separately. This is because the abrasive that is projected against highly contaminated waste is contaminated and becomes highly contaminated abrasive, and its radioactivity concentration does not reach saturation at a certain level and falls below that level. This is a method that follows the conventional wisdom that it must be replaced with.
【００１４】しかし図２に示す第２の実施例では、高汚
染研削材を単一の研削材コンベヤ7aにより数10回にわた
り循環使用する。このように高汚染研削材をバレル１内
の放射性金属廃棄物Ｗに対して繰り返し投射すると、図
３に示すように研削材の放射能濃度が徐々に低下するこ
とが判明した。However, in the second embodiment shown in FIG. 2, the highly contaminated abrasive is circulated several tens times by a single abrasive conveyor 7a. It was found that when the highly contaminated abrasive material was repeatedly projected onto the radioactive metal waste W in the barrel 1 as described above, the radioactivity concentration of the abrasive material gradually decreased as shown in FIG.
【００１５】図２に示す装置によって高汚染研削材を例
えば45回程度循環使用すると、図３に示されるように研
削材の放射能濃度は１Bq/g以下まで低下して低汚染研削
材となる。その結果、図４のグラフに示すようにこの低
汚染研削材による放射性金属廃棄物Ｗの到達表面汚染密
度は１Bq/cm2程度まで低下することとなる。なお図２に
示したように、研削材の循環経路に研削材の放射能濃度
検出器14を設け、循環中の研削材の放射能濃度を監視し
ながら除染を行えば、より正確な管理を行うことができ
る。更に図２に示したように、バレル１とバグフィルタ
11とを結ぶ排気系にダスト中の放射能濃度検出器15を設
けておき、除染の完了を確認することができるようにし
ておけば、更に好ましい。いうまでもなく、これらの研
削材の放射能濃度検出器14やダスト中の放射能濃度検出
器15は、図１の装置にも同様に組み込んで使用すること
もできる。When the highly polluted abrasive is circulated about 45 times by the apparatus shown in FIG. 2, the activity concentration of the abrasive is reduced to 1 Bq / g or less as shown in FIG. . As a result, as shown in the graph of FIG. 4, the reached surface contamination density of the radioactive metal waste W due to this low-contamination abrasive is reduced to about 1 Bq / cm 2 . As shown in FIG. 2, if a radioactive material concentration detector 14 for the abrasive material is provided in the circulation path of the abrasive material and decontamination is performed while monitoring the radioactive material concentration of the circulating abrasive material, more accurate management is possible. It can be performed. Further, as shown in FIG. 2, the barrel 1 and the bag filter
It is more preferable to provide a detector 15 for the concentration of radioactivity in the dust in the exhaust system connecting with 11, so that the completion of decontamination can be confirmed. Needless to say, the radioactivity concentration detector 14 for these abrasives and the radioactivity concentration detector 15 for dust can be similarly incorporated and used in the apparatus of FIG.
【００１６】[0016]
【発明の効果】以上に説明したように、本発明の放射性
金属廃棄物の除染方法によれば、バレルの内部で放射性
金属廃棄物を攪拌しながらその表面に研削材を投射して
ドライブラスト除染するので、放射性金属廃棄物の表面
全体を均一に除染することができる。また、研削材によ
ってバレルの内面も常に除染された状態を維持するた
め、高汚染廃棄物を処理した後に低汚染廃棄物を処理す
る場合にも低汚染廃棄物がバレルにより逆汚染されるこ
とがなく、高汚染研削材を低汚染研削材となるまで循環
使用するような方法を取ることもできる。よって本発明
は例えば原子力発電所等から廃棄される配管の切断片の
ような比較的小型の放射性金属廃棄物の処理に適した除
染方法として、きわめて価値の高いものである。As described above, according to the method for decontaminating radioactive metal waste of the present invention, the radioactive dust is agitated inside the barrel and an abrasive is projected onto the surface of the radioactive waste to drive last. Since the decontamination is performed, the entire surface of the radioactive metal waste can be decontaminated uniformly. Further, since the inner surface of the barrel is always decontaminated by the abrasive, the low-polluted waste can be back-polluted by the barrel even when the low-polluted waste is treated after the highly-polluted waste is treated. It is also possible to employ a method in which the high-contamination abrasive is circulated and used until it becomes a low-contamination abrasive. Therefore, the present invention is extremely valuable as a decontamination method suitable for treating relatively small radioactive metal wastes such as pipe fragments discarded from nuclear power plants and the like.
【図１】本発明の第１の実施例を示すフローシートであ
る。FIG. 1 is a flow sheet showing a first embodiment of the present invention.
【図２】本発明の第２の実施例を示すフローシートであ
る。FIG. 2 is a flow sheet showing a second embodiment of the present invention.
【図３】研削材の循環使用回数とその放射能濃度との関
係を示すグラフである。FIG. 3 is a graph showing the relationship between the number of times the abrasive is circulated and used and its radioactivity concentration.
【図４】研削材の放射能濃度と放射性金属廃棄物の到達
表面汚染密度との関係を示すグラフである。FIG. 4 is a graph showing the relationship between the radioactivity concentration of abrasives and the surface contamination density of radioactive metal waste.
【図５】従来例を示すフローシートである。FIG. 5 is a flow sheet showing a conventional example.
１ バレル、２ 金属廃棄物供給容器、３ 研削材投射
機、４ インペラー、５ 分級器、６ ダストボック
ス、７ 高汚染研削材コンベヤ、7a 研削材コンベヤ、
８ 低汚染研削材コンベヤ、９ ホッパー、10 ブロ
ワ、11 バグフィルタ、12 HEPAフィルタ、13 回収容
器、14 放射能濃度検出器、15 放射能濃度検出器1 barrel, 2 metal waste supply container, 3 abrasive material projector, 4 impeller, 5 classifier, 6 dust box, 7 highly polluted abrasive material conveyor, 7a abrasive material conveyor,
8 Low-contamination abrasive conveyor, 9 hopper, 10 blower, 11 bag filter, 12 HEPA filter, 13 collection container, 14 radioactivity concentration detector, 15 radioactivity concentration detector
Claims (5)
し、バレルを回転させることにより放射性金属廃棄物を
攪拌しながらその表面に研削材を投射し、かつ高汚染研
削材と低汚染研削材とを別の経路で循環させながらドラ
イブラスト除染することを特徴とする放射性金属廃棄物
の除染方法。1. A radioactive metal waste is housed inside a barrel, and while rotating the barrel, the radioactive metal waste is agitated to project an abrasive onto the surface thereof, and a highly polluting abrasive and a low polluting abrasive are used. A method for decontaminating radioactive metal waste, which comprises decontaminating the drive blast while circulating and by another route.
循環使用する請求項１に記載の放射性金属廃棄物の除染
方法。2. The method for decontaminating radioactive metal waste according to claim 1, wherein the high-contamination abrasive is recycled until it becomes a low-contamination abrasive.
バレルに、研削材投射機と回収された研削材の分級器と
を設けるとともに、この分級器と研削材投射機のホッパ
ーとの間に、高レベル研削材コンベヤと低レベル研削材
コンベヤとからなる研削材の循環経路を設けたことを特
徴とする放射性金属廃棄物の除染装置。3. An abrasive material projecting machine and a classifier for the collected abrasive material are provided on a barrel which stores radioactive metal waste and is rotated, and between the classifier and the hopper of the abrasive material projecting machine. A decontamination device for radioactive metal waste, comprising a high-level abrasive conveyor and a low-level abrasive conveyor provided with a circulating path for the abrasive.
度検出器を設けた請求項３に記載の放射性金属廃棄物の
除染装置。4. The decontamination apparatus for radioactive metal waste according to claim 3, wherein a radioactive concentration detector of the abrasive is provided in the circulation path of the abrasive.
能濃度検出器を設けた請求項３に記載の放射性金属廃棄
物の除染装置。5. The decontamination apparatus for radioactive metal waste according to claim 3, wherein the exhaust system from the barrel is provided with a detector for radioactive concentration in dust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22667094A JP3187255B2 (en) | 1994-09-21 | 1994-09-21 | Method and apparatus for decontamination of radioactive metal waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22667094A JP3187255B2 (en) | 1994-09-21 | 1994-09-21 | Method and apparatus for decontamination of radioactive metal waste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0894796A true JPH0894796A (en) | 1996-04-12 |
| JP3187255B2 JP3187255B2 (en) | 2001-07-11 |
Family
ID=16848823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22667094A Expired - Fee Related JP3187255B2 (en) | 1994-09-21 | 1994-09-21 | Method and apparatus for decontamination of radioactive metal waste |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3187255B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007315995A (en) * | 2006-05-29 | 2007-12-06 | Japan Atomic Energy Agency | Method and apparatus for decontaminating the vicinity of the surface contaminated with radioisotopes without remelting, without re-diffusion, and without re-contamination using non-thermal laser ablation |
-
1994
- 1994-09-21 JP JP22667094A patent/JP3187255B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007315995A (en) * | 2006-05-29 | 2007-12-06 | Japan Atomic Energy Agency | Method and apparatus for decontaminating the vicinity of the surface contaminated with radioisotopes without remelting, without re-diffusion, and without re-contamination using non-thermal laser ablation |
| WO2007139092A1 (en) * | 2006-05-29 | 2007-12-06 | Japan Atomic Energy Agency | Method of decontaminating radioisotope-contaminated surface vicinity region by use of nonthermal laser peeling without re-melting, without re-diffusion and without re-contamination, and apparatus therefor |
| US8097765B2 (en) | 2006-05-29 | 2012-01-17 | Japan Atomic Energy Agency | Method of decontaminating radioisotope-contaminated surface vicinity region by use of nonthermal laser peeling without re-melting, without re-diffusion and without re-contamination, and apparatus therefor |
| US8518331B2 (en) | 2006-05-29 | 2013-08-27 | Japan Atomic Energy Agency | Apparatus for decontaminating radioisotope-contaminated surface vicinity region by use of nonthermal laser peeling |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3187255B2 (en) | 2001-07-11 |
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