JP2876230B2 - Decontamination equipment for radioactive contamination equipment - Google Patents
Decontamination equipment for radioactive contamination equipmentInfo
- Publication number
- JP2876230B2 JP2876230B2 JP31839489A JP31839489A JP2876230B2 JP 2876230 B2 JP2876230 B2 JP 2876230B2 JP 31839489 A JP31839489 A JP 31839489A JP 31839489 A JP31839489 A JP 31839489A JP 2876230 B2 JP2876230 B2 JP 2876230B2
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- Prior art keywords
- decontamination
- container
- equipment
- liquid
- inert gas
- Prior art date
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は原子炉冷却機器等放射性物質によって汚染さ
れた機器の除染装置に関する。Description: TECHNICAL FIELD The present invention relates to a decontamination apparatus for equipment contaminated with radioactive materials such as reactor cooling equipment.
原子炉冷却系循環ポンプの洗浄、除染法を例にとり説
明する。第5図はNaポンプを洗浄する例で、Naポンプ4
は洗浄槽1内に入れられ、上部にあるフランジ13で洗浄
槽1上部のフランジ11に固定される。フランジ11はまた
は、洗浄槽1を架台3に固定するためのものである。Na
ポンプ上方は、カバー2でおおわれている。カバー2下
端にもフランジ12があり、洗浄槽1のフランジ11に取付
けられている。この様にフランジ11と12が接続されるこ
とにより、Naポンプ4は洗浄槽1とカバー2ですっぽり
おおわれた形になる。洗浄槽1下方には、洗浄槽1内に
湿潤窒素5を供給する止め弁7aを有する配管6がある。
洗浄槽1に供給された湿潤窒素5中の水分は、Naポンプ
4に付着したNaと反応し水酸化ナトリウム(NaOH)とな
り、液体になって洗浄槽1下部にたまる。たまったNaOH
は、止め弁7cを有するドレン配管10からNaOH液9となり
収納容器に収納される。一方、洗浄槽1内で水分をとら
れた窒素8は、止め弁7bを有する配管9からガス処理装
置へと導かれる。洗浄槽1内の湿潤窒素5中の水分とNa
ポンプ4に付着したNaとの反応は、洗浄槽1に取付けら
れた水素計等(図示せず)で監視される。両者の反応が
ほとんど認められなくなった時点で、蒸留水を配管6か
ら洗浄槽1に供給し、Naポンプ4のすき間等に残ってい
るNaと反応させ、廃液としてドレン配管10から回収す
る。The cleaning and decontamination method of the circulating pump of the reactor cooling system will be described as an example. Fig. 5 shows an example of cleaning the Na pump.
Is placed in the cleaning tank 1 and fixed to the flange 11 on the upper part of the cleaning tank 1 by the flange 13 on the upper part. The flange 11 is for fixing the washing tank 1 to the gantry 3. Na
The upper part of the pump is covered with a cover 2. A flange 12 is also provided at the lower end of the cover 2, and is attached to the flange 11 of the cleaning tank 1. By connecting the flanges 11 and 12 in this manner, the Na pump 4 is completely covered with the washing tank 1 and the cover 2. A pipe 6 having a stop valve 7a for supplying wet nitrogen 5 into the cleaning tank 1 is provided below the cleaning tank 1.
The water in the wet nitrogen 5 supplied to the cleaning tank 1 reacts with Na adhering to the Na pump 4 to become sodium hydroxide (NaOH), becomes a liquid, and accumulates at the lower part of the cleaning tank 1. Accumulated NaOH
Becomes NaOH solution 9 from a drain pipe 10 having a stop valve 7c and is stored in a storage container. On the other hand, the nitrogen 8 from which moisture has been removed in the cleaning tank 1 is guided to a gas processing device from a pipe 9 having a stop valve 7b. Moisture and Na in wet nitrogen 5 in cleaning tank 1
The reaction with Na attached to the pump 4 is monitored by a hydrogen meter or the like (not shown) attached to the washing tank 1. When almost no reaction is observed between the two, distilled water is supplied from the pipe 6 to the washing tank 1 to react with Na remaining in the gap of the Na pump 4 and collected from the drain pipe 10 as waste liquid.
次に除染法について一般的にとられている化学除染の
概要を示す。弱酸性の除染液を用い、除染容器の放射性
汚染機器を除染液に浸し、この機器の表面を溶かして削
り取る除染をさせ、ある時間経過したら除染液をドレン
するものである。線量率測定によりモニタリングし、必
要なら前述の操作をくり返す。除染後は前記機器をアル
カリ液に浸し中和させてから水洗浄及び乾燥を行う。Next, the outline of chemical decontamination generally used for the decontamination method will be described. A weakly acidic decontamination solution is used to immerse the radioactively contaminated equipment in the decontamination container in the decontamination liquid, dissolve the surface of this equipment and remove it, and drain the decontamination liquid after a certain period of time. Monitor by dose rate measurement and repeat the above operation if necessary. After decontamination, the device is immersed in an alkaline solution to neutralize, and then washed with water and dried.
上記従来技術の洗浄法は、機器の表面に付着している
放射性物質に対しての除去には効果があるが、機器の内
部に拡散・沈着している放射性物質に対しては除去効果
がほとんど見込めないこと、また、上記従来技術の除染
法は除染後の廃液(放射性物質を含んだ除染液)の量が
多くなる問題があった。The above-described conventional cleaning method is effective for removing radioactive substances adhering to the surface of the device, but has almost no effect on radioactive materials diffused and deposited inside the device. In addition, there is a problem that the amount of waste liquid (decontamination liquid containing a radioactive substance) after the decontamination increases in the decontamination method of the related art.
本発明の目的は、放射性物質の除去効果を向上させか
つ廃液量を低減することのできる放射性汚染機器の除染
装置を提供することにある。An object of the present invention is to provide a decontamination apparatus for a radioactively polluted device, which can improve the effect of removing radioactive substances and reduce the amount of waste liquid.
上記の目的は、放射性汚染機器を収納した容器の内外
において表面に除染液を付着させた不活性ガスの気泡を
発生させ、この気泡で前記機器を覆い除染することによ
って達成される。The above object is achieved by generating air bubbles of an inert gas having a decontamination liquid adhered to the surface inside and outside of a container accommodating radioactive contaminated equipment, and covering the equipment with the air bubbles for decontamination.
すなわち、本発明は、放射性汚染機器を収納する容器
と、この容器内で表面に除染液を付着させた不活性ガス
の気泡を発生させる内部気泡発生手段と、を備えた放射
性汚染機器の除染装置である。That is, the present invention provides a method for removing a radioactively contaminated device comprising: a container for accommodating the radioactively contaminated device; and an internal bubble generating means for generating a bubble of an inert gas having a decontamination liquid adhered to the surface in the container. It is a dyeing device.
また、本発明は、放射性汚染機器を収納する容器と、
この容器内の上下方向中央付近に設けられ前記放射性汚
染機器の除染装置を支持する多孔架台と、容器の前記多
孔架台の下部内に除染液を供給し且つ回収する除染液供
給回収手段と、前記容器内に供給されている除染液内に
不活性ガスを供給する不活性ガス供給手段と、容器下部
に連通された廃液回収タンクと、を備えた放射性汚染機
器の除染装置である。Also, the present invention provides a container for storing radioactive contamination equipment,
A perforated pedestal provided near the center in the vertical direction in the container to support the decontamination device of the radioactively contaminated device, and a decontaminated liquid supply / recovery means for supplying and recovering the decontaminated liquid into the lower part of the perforated pedestal of the container And an inert gas supply means for supplying an inert gas into the decontamination liquid supplied to the container, and a waste liquid recovery tank communicated with the lower part of the container. is there.
また、本発明は、放射性汚染機器を収納する容器と、
この容器外で表面に除染液を付着させた不活性ガスの気
泡を発生させる外部気泡発生手段と、前記気泡を前記容
器内に導入するラインと、を備えた放射性汚染機器の除
染装置である。Also, the present invention provides a container for storing radioactive contamination equipment,
A decontamination apparatus for radioactive contamination equipment comprising: an external bubble generating means for generating bubbles of an inert gas having a decontamination liquid adhered to the surface outside the container; and a line for introducing the bubbles into the container. is there.
また、本発明は、放射性汚染機器を収納する容器と、
この容器内で表面に除染液を付着させた不活性ガスの気
泡を発生させる内部気泡発生手段と、前記容器外で表面
に除染液を付着させた不活性ガスの気泡を発生させる外
部気泡発生手段と、この外部気泡発生手段で発生させた
気泡を前記容器内に導入するラインと、を備えた放射性
汚染機器の除染装置である。ここで、内部気泡発生手段
で発生した気泡は容器内を上昇しつつ放射性汚染機器と
接触し、外部気泡発生手段から供給される気泡は前記放
射性汚染機器に上方より吹き付けられて接触するもので
あるのがよい。Also, the present invention provides a container for storing radioactive contamination equipment,
Internal air bubble generating means for generating air bubbles of an inert gas having a decontamination liquid adhered to the surface thereof inside the container, and external air bubbles for generating air bubbles of an inert gas having a decontamination liquid adhered to the surface outside the container A decontamination apparatus for a radioactively polluted device, comprising: a generation unit; and a line for introducing bubbles generated by the external bubble generation unit into the container. Here, the air bubbles generated by the internal air bubble generating means come into contact with the radioactively contaminated device while ascending in the container, and the air bubbles supplied from the external air bubble generating means are blown into contact with the radioactively contaminated device from above. Is good.
また、本発明は、放射性汚染機器を収納する容器と、
この容器内の上下方向中央付近に設けられ前記放射性汚
染機器を支持する多孔架台と、この多孔架台の下部容器
内に除染液を供給する除染液供給手段と、多孔架台の下
部容器内と連通する閉ループの除染液配管と、を備えた
放射性汚染機器の除染装置である。Also, the present invention provides a container for storing radioactive contamination equipment,
A perforated pedestal provided near the center in the vertical direction in the container and supporting the radioactively contaminated device, a decontamination liquid supply means for supplying a decontamination liquid into a lower container of the perforated gantry, and a lower container of the perforated pedestal A decontamination apparatus for radioactive contamination equipment, comprising:
表面に除染液を付着させた不活性ガスの気泡により除
染することは、除染液が少量でかつ表面積を大きくとれ
るため廃液量を低減できる。Performing decontamination with bubbles of an inert gas having a decontamination liquid adhered to the surface can reduce the amount of waste liquid because the decontamination liquid is small and the surface area is large.
また、不活性ガスとして例えば、N2ガスを用いること
により除染容器内の酸素濃度を低下させ以って、除染時
の酸化皮膜の形成を低減できることによって、除染効果
を向上させることができる。Further, for example, by using an N 2 gas as an inert gas to reduce the oxygen concentration in the decontamination container, it is possible to reduce the formation of an oxide film during decontamination, thereby improving the decontamination effect. it can.
以下、本発明の実施例を図面を用いて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(実施例1) 第1図は放射性汚染機器を収納した容器内において表
面に除染液を付着させた不活性ガスの気泡を発生させ、
この気泡で前記機器を覆い除染する実施例である。(Example 1) Fig. 1 shows the generation of an inert gas bubble having a decontamination liquid attached to the surface thereof in a container containing radioactive contamination equipment.
This is an example of covering and decontaminating the device with these bubbles.
第1図において、容器1内の架台2上に放射性汚染機
器3が設置される。架台2には隙間があり、その下部に
多孔質の板4が設けられている。容器1には除染液タン
ク5より除染液を導くための弁6、ポンプ7を備えた配
管8、除染液をドレンするための弁9を備えた配管10、
不活性ガスを注入するための弁11を備えた配管12、不活
性ガスを排出するための弁13を備えた配管14、及び除染
後の廃液を廃液回収タンク15に導くための弁16を備えて
配管17が接続される。また、容器1には計測器として液
位計18、溶存酸素濃度計19及び温度計20が設けられる。In FIG. 1, a radioactive contamination device 3 is installed on a gantry 2 in a container 1. The gantry 2 has a gap, and a porous plate 4 is provided below the gap. The container 1 has a valve 6 for guiding the decontamination liquid from the decontamination liquid tank 5, a pipe 8 having a pump 7, a pipe 10 having a valve 9 for draining the decontamination liquid,
A pipe 12 provided with a valve 11 for injecting an inert gas, a pipe 14 provided with a valve 13 for discharging an inert gas, and a valve 16 for guiding waste liquid after decontamination to a waste liquid recovery tank 15 are provided. The pipe 17 is connected. The container 1 is provided with a liquid level meter 18, a dissolved oxygen concentration meter 19, and a thermometer 20 as measuring devices.
以上の構成において容器1の多孔質板4の下部まで除
染液タンク5より除染液を注入する。除染液の注水完了
後は不活性ガスを配管12を通して容器1の下部に貯留し
ている除染液の中に注入、バブリングさせる。多孔質板
4により気泡の大きさが調整され、放射性汚染機器3は
直ちに気泡により覆われる。ある程度の時間が経過した
ら不活性ガスによるバブリングを止める。この後、容器
1の除染液を除染液タンク5にドレンする。このドレン
操作は容器1に除染液を注水後短時間内に行われるため
ドレンした除染液には放射性物質はほとんど含まれてい
ない。放射性汚染機器3を覆っている気泡は、表面に除
染液が付着しており、これにより放射性汚染機器3は除
染される。この除染には、機器表面の隙間に残っていた
汚れを除去することと、更に機器表面の内部に拡散・沈
着しているCoやMn等の放射性物質も、その表面を除染液
で溶かして削りとることにより除去されることの両方が
含まれる。すなわち気泡がつぶれ放射性物質を含んだ廃
液が容器1の下部にたまる。この廃液は放射性廃棄物と
して廃液回収タンク15に回収する。In the above configuration, the decontamination liquid is injected from the decontamination liquid tank 5 to the lower part of the porous plate 4 of the container 1. After the injection of the decontamination liquid is completed, an inert gas is injected into the decontamination liquid stored in the lower part of the container 1 through the pipe 12 and bubbled. The size of the bubbles is adjusted by the porous plate 4, and the radioactive contamination device 3 is immediately covered with the bubbles. After a certain period of time, stop bubbling with an inert gas. Thereafter, the decontamination liquid in the container 1 is drained into the decontamination liquid tank 5. This draining operation is performed within a short time after the decontamination liquid is poured into the container 1, so that the drained decontamination liquid hardly contains a radioactive substance. The air bubbles covering the radioactively contaminated device 3 have a decontamination liquid attached to the surface, whereby the radioactively contaminated device 3 is decontaminated. This decontamination involves removing dirt remaining in gaps on the equipment surface, and also dissolving radioactive substances such as Co and Mn that have diffused and deposited inside the equipment surface with the decontamination liquid. And removal by scraping. That is, the bubbles collapse and the waste liquid containing the radioactive substance accumulates in the lower part of the container 1. This waste liquid is collected in the waste liquid recovery tank 15 as radioactive waste.
以上、必要に応じ前述した操作をくり返し行う。尚、
除染時間は対象機器の形状や大きさにより変動するが50
〜100時間程度を見込めば通常は充分である。The above operation is repeated as necessary. still,
The decontamination time varies depending on the shape and size of the target equipment, but 50
Expecting ~ 100 hours is usually sufficient.
(実施例2) 第2図は放射性汚染機器を収納した容器外において表
面に除染液を付着させた不活性ガスの気泡を発生させ、
この気泡で前記機器を覆い除染する実施例である。(Example 2) Fig. 2 shows the generation of an inert gas bubble having a decontamination liquid attached to the surface outside a container containing radioactive contamination equipment.
This is an example of covering and decontaminating the device with these bubbles.
第2図に示すように不活性ガスによるバブリングは、
除染液タンク5の中で行う。除染液タンク5内に設けら
れている多孔質板4により気泡の大きさが調整され、気
泡は配管8を通して容器1に導かれる。配管8の先端に
は複数個の吹きつけノズル21があり、このノズルより表
面に除染液を付着させた不活性ガスが吹き出し放射性汚
染機器3を覆い除染する。この場合は、実施例1で示し
た除染液のドレン操作は不要であり除染後の廃液回収タ
ンク15への廃液の回収のみが必要となる。As shown in FIG. 2, bubbling with an inert gas
This is performed in the decontamination liquid tank 5. The size of the bubbles is adjusted by the porous plate 4 provided in the decontamination liquid tank 5, and the bubbles are guided to the container 1 through the pipe 8. A plurality of spray nozzles 21 are provided at the tip of the pipe 8, and an inert gas having a decontamination liquid adhered to the surface from the nozzles blows out to cover the radioactive contaminated device 3 for decontamination. In this case, the draining operation of the decontamination liquid shown in the first embodiment is unnecessary, and only the recovery of the waste liquid in the waste liquid recovery tank 15 after decontamination is required.
(実施例3) 第3図は前記の実施例1と実施例2を併用した実施例
である。すなわち放射性汚染機器を収納した容器の内及
び外において表面に除染液を付着させた不活性ガスの気
泡を発生させ、この気泡で前記機器を覆い除染する実施
例である。(Embodiment 3) FIG. 3 shows an embodiment in which Embodiments 1 and 2 are used in combination. That is, in this embodiment, air bubbles of an inert gas having a decontamination liquid adhered to the surface thereof are generated inside and outside a container storing radioactive contamination equipment, and the equipment is covered with the air bubbles and decontamination is performed.
第3図に示すように除染液タンク5の内部は仕切板22
によって二分割されており、一方は、容器1に除染液を
送り出すための除染液、配管8等が、他方は、容器1に
不活性ガスの気泡を送り出すための除染液、多孔質板
4、不活性ガス配管12′、配管8′より構成される。こ
の実施例は、放射性汚染機器3が複雑形状の場合に適し
ている。As shown in FIG. 3, the interior of the decontamination liquid tank 5 is
One is a decontamination solution for sending out the decontamination solution to the container 1, the piping 8, and the other is a decontamination solution for sending out bubbles of the inert gas to the container 1, and a porous material. It comprises a plate 4, an inert gas pipe 12 'and a pipe 8'. This embodiment is suitable when the radioactive contamination device 3 has a complicated shape.
(実施例4) 前記の実施例1〜実施例3の場合、容器への除染液の
注入、排出はワンスルー方式であったが、これを再循環
方式にしたのが第4図に示す実施例である。(Example 4) In the case of Examples 1 to 3 described above, the decontamination solution was injected and discharged into the container by a one-through method, but this was changed to a recirculation method as shown in FIG. It is an example.
第4図に示すように容器1に除染液を注入し、排出す
るための配管25は閉ループを構成している。再循環系配
管25には除染液を補充するための配管8及び廃液を回収
するための配管17が接続される。通常は、弁6及び弁16
は閉鎖した状態で運転される。As shown in FIG. 4, a pipe 25 for injecting and discharging the decontamination liquid into the container 1 forms a closed loop. A pipe 8 for replenishing the decontamination liquid and a pipe 17 for collecting waste liquid are connected to the recirculation system pipe 25. Normally, valve 6 and valve 16
Is operated in a closed state.
なお、本実施例は、前記の実施例1を変形したもので
あるが前記の実施例2及び実施例3についても同様に変
形することができる。Note that the present embodiment is a modification of the first embodiment, but the same can be applied to the second and third embodiments.
本発明によれば、表面に除染液を付着させた不活性ガ
スの気泡により除染するので、除染液が少量でかつ表面
積を大きくとれるため廃液量の低減の効果がある。ま
た、不活性ガスとして例えば、N2ガスを用いることによ
り除染容器内の酸素濃度を低下させることができるので
除染効果の向上ができる。ADVANTAGE OF THE INVENTION According to this invention, since it decontaminates by the bubble of the inert gas which made the decontamination liquid adhere to the surface, the decontamination liquid has a small amount and a large surface area, and has the effect of reducing the amount of waste liquid. Further, for example, by using N 2 gas as the inert gas, the oxygen concentration in the decontamination container can be reduced, so that the decontamination effect can be improved.
例えば、除染液1%シュウ酸+クエン酸、除染液温度
70℃、除染時間100hとして、N2ガスによるバブリングを
行った場合は、バブリングを行なわない場合に比べ約2
倍の除染効果がある。For example, decontamination solution 1% oxalic acid + citric acid, decontamination solution temperature
When bubbling with N 2 gas was performed at 70 ° C. and decontamination time was 100 h, it was about 2
Double the decontamination effect.
第1図は本発明の一実施例の除染容器内で不活性ガスの
気泡を発生させる放射性汚染機器の除染装置の縦断面図
であり、第2図は本発明の他の実施例である除染容器外
で不活性ガスの気泡を発生させる放射性汚染機器の除染
装置の縦断面図であり、第3図は前記2つの実施例を併
用した放射性汚染機器の除染装置の縦断面図であり、第
4図は前記実施例の一部を変形した放射性汚染機器の除
染装置の縦断面図であり、第5図は従来技術の実施例を
示したものである。 1…容器、2…架台、3…放射性汚染機器、4…多孔質
板、5…除染液タンク、12,12′,14…不活性ガス配管、
15…廃液回収タンク。FIG. 1 is a longitudinal sectional view of a decontamination apparatus of a radioactive contamination device for generating an inert gas bubble in a decontamination container of one embodiment of the present invention, and FIG. 2 is another embodiment of the present invention. FIG. 3 is a vertical cross-sectional view of a decontamination apparatus of a radioactive contaminated device that generates an inert gas bubble outside a certain decontamination container, and FIG. 3 is a vertical cross section of a decontamination device of the radioactive contaminated device using the two embodiments in combination. FIG. 4 is a longitudinal sectional view of a decontamination apparatus for a radioactive contamination device in which a part of the above embodiment is modified, and FIG. 5 shows an embodiment of the prior art. DESCRIPTION OF SYMBOLS 1 ... Container, 2 ... Stand, 3 ... Radioactive contamination equipment, 4 ... Porous plate, 5 ... Decontamination liquid tank, 12, 12 ', 14 ... Inert gas piping,
15… Waste liquid recovery tank.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 下屋敷 重広 茨城県日立市森山町1168番地 株式会社 日立製作所エネルギー研究所内 (72)発明者 引地 貴義 茨城県日立市森山町1168番地 株式会社 日立製作所エネルギー研究所内 (56)参考文献 特開 昭60−256100(JP,A) 特開 昭62−91900(JP,A) (58)調査した分野(Int.Cl.6,DB名) G21F 9/28 ──────────────────────────────────────────────────続 き Continued on the front page (72) Shigehiro Shimoyashiki, 1168 Moriyamacho, Hitachi City, Ibaraki Prefecture Inside Energy Laboratory, Hitachi, Ltd. (72) Inventor Takayoshi Hikichi 1168 Moriyamamachi, Hitachi City, Ibaraki Prefecture Energy, Hitachi (56) References JP-A-60-256100 (JP, A) JP-A-62-91900 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) G21F 9/28
Claims (2)
器内の上下方向中央付近に設けられ前記放射性汚染機器
の除染装置を支持する多孔架台と、容器の前記多孔架台
の下部内に除染液を供給し且つ回収する除染液供給回収
手段と、前記容器内に供給されている除染液内に不活性
ガスを供給する不活性ガス供給手段と、容器下部に連通
された廃液回収タンクと、を備えた放射性汚染機器の除
染装置。1. A container for accommodating a radioactively polluted device, a perforated pedestal provided near the center in the up-down direction of the container to support a decontamination device for the radioactively contaminated device, and A decontamination liquid supply / recovery means for supplying and recovering the liquor, an inert gas supply means for supplying an inert gas into the decontamination liquid supplied into the container, and a waste liquid recovery communicated with a lower part of the container A decontamination device for radioactive contamination equipment, comprising: a tank;
器内の上下方向中央付近に設けられ前記放射性汚染機器
を支持する多孔架台と、この多孔架台の下部容器内に除
染液を供給する除染液供給手段と、多孔架台の下部容器
内と連通する閉ループの除染液配管と、を備えた放射性
汚染機器の除染装置。2. A container for accommodating a radioactively contaminated device, a perforated pedestal provided near the center of the container in the up-down direction to support the radioactively contaminated device, and a decontamination liquid supplied to a lower container of the perforated pedestal. A decontamination apparatus for radioactive contamination equipment, comprising: a decontamination liquid supply means; and a closed-loop decontamination liquid pipe communicating with the inside of the lower container of the porous frame.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31839489A JP2876230B2 (en) | 1989-12-07 | 1989-12-07 | Decontamination equipment for radioactive contamination equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31839489A JP2876230B2 (en) | 1989-12-07 | 1989-12-07 | Decontamination equipment for radioactive contamination equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03179298A JPH03179298A (en) | 1991-08-05 |
JP2876230B2 true JP2876230B2 (en) | 1999-03-31 |
Family
ID=18098666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP31839489A Expired - Fee Related JP2876230B2 (en) | 1989-12-07 | 1989-12-07 | Decontamination equipment for radioactive contamination equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2876230B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014062735A (en) * | 2011-10-25 | 2014-04-10 | Suyama Kiyoshi | Decontamination method for buildings, soil, or plants contaminated with radioactive materials |
-
1989
- 1989-12-07 JP JP31839489A patent/JP2876230B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH03179298A (en) | 1991-08-05 |
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