JP2553457B2 - Radioactive contaminant treatment method - Google Patents
Radioactive contaminant treatment methodInfo
- Publication number
- JP2553457B2 JP2553457B2 JP5255828A JP25582893A JP2553457B2 JP 2553457 B2 JP2553457 B2 JP 2553457B2 JP 5255828 A JP5255828 A JP 5255828A JP 25582893 A JP25582893 A JP 25582893A JP 2553457 B2 JP2553457 B2 JP 2553457B2
- Authority
- JP
- Japan
- Prior art keywords
- chelating agent
- cement
- radioactive
- agent solution
- cement paste
- 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.)
- Expired - Fee Related
Links
- 239000004568 cement Substances 0.000 claims description 40
- 239000002738 chelating agent Substances 0.000 claims description 32
- 230000002285 radioactive effect Effects 0.000 claims description 27
- 239000003344 environmental pollutant Substances 0.000 claims description 17
- 231100000719 pollutant Toxicity 0.000 claims description 17
- 239000000356 contaminant Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000007935 neutral effect Effects 0.000 claims description 7
- 238000006703 hydration reaction Methods 0.000 claims description 5
- 230000002378 acidificating effect Effects 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 230000000887 hydrating effect Effects 0.000 claims 1
- 239000000243 solution Substances 0.000 description 22
- 239000007864 aqueous solution Substances 0.000 description 7
- 238000005868 electrolysis reaction Methods 0.000 description 6
- 239000000941 radioactive substance Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は原子力発電所等で用い
られる放射性汚染物の処理方法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 for treating radioactive pollutants used in nuclear power plants and the like.
【０００２】[0002]
【従来の技術】従来、放射性汚染物の処理方法として
は、その放射性汚染物をキレート剤液により処理して、
放射性汚染物質をキレート剤液に封鎖させ、のち、この
キレート剤液とセメントによりセメントペーストを形成
し、このセメントペーストをドラム缶等に収容して固化
させ、密閉して都会から遠隔の保管場所に保管すること
が行われている。2. Description of the Related Art Conventionally, as a method for treating radioactive contaminants, the radioactive contaminants are treated with a chelating agent solution,
The radioactive contaminants are blocked in the chelating agent solution, and then the cement paste is formed by the chelating agent solution and cement, and the cement paste is housed in a drum or the like to be solidified, sealed and stored in a storage location remote from the city. Is being done.
【０００３】[0003]
【発明が解決しようとする課題】しかし上記の処理方法
は次のような欠点を有しいる。それは放射性汚染物質を
有するキレート剤液とセメントによりセメントペースト
を形成し、これをドラム缶に収容する結果、固化したセ
メントは長年月の間に上記キレート剤液のキレート剤に
より劣化し、脆化し、崩壊を起こし易いのである。又前
記ドラム缶も上記キレート剤液のキレート剤により腐食
され、それにより破損し易くなる。However, the above processing method has the following drawbacks. It forms a cement paste with a chelating agent solution containing radioactive pollutants and cement, and as a result of storing this in a drum, the solidified cement is deteriorated by the chelating agent of the chelating agent solution over a long period of time, becomes brittle, and collapses. Is likely to occur. Further, the drum can is also corroded by the chelating agent of the chelating agent solution, and thus is easily damaged.
【０００４】この発明は上記の問題を解決するためにな
されたもので、その目的は、放射性汚染物をキレート剤
液により処理し、放射性物質を封鎖させ、のちこのキレ
ート剤液にセメントを用いてセメントペーストを形成
し、これを固化させて保存する場合に、その固化したセ
メントの劣化、脆化を従来のものより一層少なくするこ
とのできる、放射性汚染物の処理方法を提供することで
あり、又他の目的はドラム缶のような金属製容器に放射
性汚染物質を含むキレート剤液とセメントから成るセメ
ントペーストを収容して固化させた際に、そのドラム缶
等の金属製容器の腐食を従来より一層少なくすることの
できる、放射性汚染物の処理方法を提供することであ
る。The present invention has been made to solve the above problems, and its purpose is to treat radioactive pollutants with a chelating agent solution to block radioactive substances, and then to use cement as the chelating agent solution. A cement paste is formed, and when it is solidified and stored, deterioration and embrittlement of the solidified cement can be further reduced as compared with conventional ones, and it is to provide a method for treating radioactive contaminants, Another purpose is to further prevent corrosion of a metal container such as a drum can when a cement paste composed of a chelating agent liquid containing a radioactive contaminant and cement is stored and solidified in a metal container such as a drum can. It is an object of the present invention to provide a method for treating radioactive pollutants that can be reduced.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するこ
の発明の方法について述べるとそれは、放射性汚染物の
汚染物質を、キレート剤と水とにより形成されたキレー
ト剤液により封鎖し、この放射性汚染物質を有するキレ
ート剤液を直流電流により電解して、キレート性を消失
させ、かつ酸性から中性又はアルカリ性に変化させ、該
中性又はアルカリ性となりかつキレート性を消失した前
記キレート剤液を、セメントの水和反応水としてセメン
トに加えて水和させ、セメントペーストを形成し、該セ
メントペーストを固化させることを特徴とする放射性汚
染物の処理方法である。SUMMARY OF THE INVENTION A method of the present invention that achieves the above objectives is described in which radioactive pollutants are polluted by a chelating agent solution formed by a chelating agent and water. Blocked and electrolyzed the chelating agent solution containing this radioactive pollutant by direct current to eliminate the chelating property .
And change from acidic to neutral or alkaline,
Before becoming neutral or alkaline and losing its chelating property
The serial chelating agent solution, cement as the hydration reaction water of cement
In addition to hydration, cement paste is formed and the cement paste is solidified, which is a method for treating radioactive contaminants.
【０００６】又セメントペーストの固化は金属製の容器
内において行われる前記放射性汚染物の処理方法であ
る。 The solidification of the cement paste is made of a metal container.
This is a method for treating the radioactive pollutants carried out in the inside .
【０００７】[0007]
【作用】この発明の方法は前記のように構成され、放射
性汚染物から汚染物質を獲得し、封鎖した汚染物質を有
するキレート剤液は電気分解され、この電解により電極
においてＨ2 、ＣＯ2 、Ｏ2 、ＣＨ4 等のガスを放出
し、キレート性を有しない放射性物質を含有する水溶液
が形成される。この水溶液は酸性から中性又はアルカリ
性に変化させられており、この水溶液とセメントにより
セメントペーストを形成すると、このセメントペースト
が固化したものはキレート剤の影響を受けることがない
ので、その保存が長期間に及んでも、その固化したセメ
ントの劣化、脆化は前記従来のものより大巾に少なくす
ることができる。The method of the present invention is constructed as described above. The pollutant is obtained from radioactive pollutants, and the chelating agent solution containing the blocked contaminants is electrolyzed, and this electrolysis causes H 2 , CO 2 , and Gases such as O 2 and CH 4 are released to form an aqueous solution containing a radioactive substance having no chelating property. This aqueous solution has been changed from acidic to neutral or alkaline, and when cement paste is formed from this aqueous solution and cement, the solidified cement paste is not affected by the chelating agent, so its preservation is long. Even over a period of time, deterioration and embrittlement of the solidified cement can be greatly reduced as compared with the conventional one.
【０００８】又、容器がドラム缶等のように金属により
形成されたものは同様な理由によりその腐食を前記従来
のものより大巾に少なくすることができる。Further, the container made of metal such as a drum can has its corrosion greatly reduced as compared with the conventional one for the same reason.
【０００９】[0009]
【実施例】図１はこの発明の実施例を示すブロック図で
あり、１は放射性汚染物２の洗浄槽を示す。同洗浄槽１
はキレート剤液タンク３からキレート剤液の供給を受け
る。キレート剤液は一例としてキレスト化学株式会社製
の商品名キレストールＱが用いられた。放射性汚染物２
はキレート剤液により洗浄槽１において洗浄される。又
この際超音波振動装置４が作動させられ、効果的に洗浄
が行われる。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of the present invention, and 1 shows a cleaning tank for radioactive contaminants 2. Same cleaning tank 1
Receives the supply of the chelating agent solution from the chelating agent solution tank 3. As the chelating agent solution, for example, Cholestol Q (trade name, manufactured by Kirest Chemical Co., Ltd.) was used. Radioactive pollutant 2
Is washed in the washing tank 1 with a chelating agent solution. Further, at this time, the ultrasonic vibration device 4 is operated, and the cleaning is effectively performed.
【００１０】そしてその結果上記放射性汚染物の放射能
を有する各種金属イオンが上記キレート剤液により封鎖
され、放射性物質は上記キレート剤液中に移行し、上記
放射性汚染物２は除染される。As a result, various radioactive metal ions of the radioactive pollutant are blocked by the chelating agent solution, the radioactive substance is transferred into the chelating agent solution, and the radioactive contaminant 2 is decontaminated.
【００１１】次に、上記の各種金属イオンとして放射性
汚染物質を封鎖して含有するキレート剤液は電解槽５に
移される。そして同電解槽５において、白金電極、又は
チタン電極等を用いて、直流電流により電気分解が行わ
れる。Next, the chelating agent solution containing the radioactive pollutants blocked as various metal ions is transferred to the electrolytic cell 5. Then, in the electrolytic cell 5, a platinum electrode, a titanium electrode, or the like is used to perform electrolysis by direct current.
【００１２】この電解の際陰極にはＨ2 が、陽極にはＯ
2 、ＣＨ4 、Ｃ2 Ｈ6 、ＣＯ2 等が発生して上記キレー
ト剤液が電解される。なおこの場合白金電極を用いるこ
とにより、電極上に金属の折出を防止できる。During this electrolysis, H 2 is supplied to the cathode and O 2 is supplied to the anode.
2 , CH 4 , C 2 H 6 , CO 2, etc. are generated and the chelating agent solution is electrolyzed. In this case, a platinum electrode can be used to prevent metal from protruding on the electrode.
【００１３】そして上記電解により上記キレート剤液は
キレート性を消失してしまい、キレート性のない、放射
性の各種金属イオンを含有した水溶液となる。なおこの
水溶液は中性又はアルカリ性である。By the electrolysis, the chelating agent solution loses its chelating property and becomes an aqueous solution containing various radioactive metal ions having no chelating property. The aqueous solution is neutral or alkaline.
【００１４】次にこのように電解されて生じた、キレー
ト性のない、放射性物質を含有した水溶液は、混練槽６
に移され、同混練槽６に、セメント７が供給され、図示
しない攪拌装置により攪拌されてセメントペーストが形
成される。このセメントペーストは放射性物質を含有し
て流動性を有する。Next, the aqueous solution containing a radioactive substance having no chelating property, which is generated by the electrolysis as described above, is mixed in the kneading tank 6.
Then, the cement 7 is supplied to the kneading tank 6 and stirred by a stirring device (not shown) to form cement paste. This cement paste contains a radioactive substance and has fluidity.
【００１５】このように形成されたセメントペーストは
金属容器８の一例としてのドラム缶に収容され、密閉さ
れる。なおこの金属容器は一例であり、これに限らずに
他の適宜の容器を用いても差支えはない。The cement paste thus formed is contained in a drum, which is an example of the metal container 8, and is sealed. Note that this metal container is an example, and the present invention is not limited to this, and any other suitable container may be used.
【００１６】そして上記のようにドラム缶に収容され、
密閉されたセメントペーストは同缶中において固化する
ので、固化したセメントを有するドラム缶は保管場所に
送られ保管される。Then, as described above, it is housed in a drum,
Since the sealed cement paste is solidified in the can, the drum having the solidified cement is sent to the storage location and stored.
【００１７】次に上記の説明は放射性物質を含有し、キ
レート性を失った水溶液にセメントを加え、セメントペ
ーストを形成する場合について述べたが、この外、セメ
ントに替えて合成樹脂、特に水溶性合成樹脂、一例とし
てＰＶＡ系合成樹脂等に混合して容器に収容し、固化さ
せてもよい。The above description has been made on the case where cement is added to an aqueous solution containing a radioactive substance and having lost its chelating property to form a cement paste. In addition to this, instead of cement, synthetic resin, particularly water-soluble A synthetic resin, for example, a PVA-based synthetic resin or the like may be mixed and housed in a container and solidified.
【００１８】[0018]
【発明の効果】この発明は前記のように構成され、放射
性汚染物質を封鎖して有するキレート剤液は電解により
キレート性を消失させられ、かつ酸性から中性又はアル
カリ性に変化させられており、このためこのように酸性
を消失させられた前記キレート剤液をセメントの水和反
応水としてセメントに加え、セメントペーストを形成
し、固化させたことにより固化したセメントペーストは
長年月を経ても、前記従来のものに較べ、その劣化、脆
化を大巾に少なくすることができる。従って、上記劣
化、脆化に伴う放射性物質の露出の恐れを大巾に抑制す
ることができる。かつ又放射性を有する水を水和水とし
て安全に保管することができる。 The present invention is constructed as described above and emits radiation.
The chelating agent solution that has blocked the pollutant by electrolysis
It loses its chelating property and is acidic to neutral or alkane.
It has been changed to potency, and as a result,
The was abolished chelate agent liquid hydration of the cement reaction
Form cement paste in addition to cement as water response
The cement paste that has been solidified by solidifying
Even after many years, its deterioration and brittleness compared to the conventional ones.
It can be greatly reduced. Therefore, the above
Suppresses the risk of exposure of radioactive materials due to aging and embrittlement
Can be Also, water with radioactivity is used as hydration water.
Can be stored safely.
【００１９】又上記セメントペーストを金属容器に収容
したものは、同様な理由により該容器の腐食を、前記従
来のものよりも大巾に少くすることができる。In the case where the above-mentioned cement paste is housed in a metal container, the corrosion of the container can be greatly reduced as compared with the conventional one for the same reason.
【図面の簡単な説明】[Brief description of drawings]
【図１】この発明の実施例を示し、放射性汚染物の処理
方法の概略を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of the present invention and showing an outline of a method for treating radioactive contaminants.
１ 洗浄槽 ２ 放射性汚染物 ３ キレート剤液タンク ４ 超音波振動装置 ５ 電解槽 ６ 混練槽 ７ セメント ８ 金属容器 1 Cleaning Tank 2 Radioactive Pollutants 3 Chelating Agent Liquid Tank 4 Ultrasonic Vibration Device 5 Electrolytic Tank 6 Kneading Tank 7 Cement 8 Metal Container
Claims (2)
と水とにより形成されたキレート剤液により封鎖し、こ
の放射性汚染物質を有するキレート剤液を直流電流によ
り電解して、キレート性を消失させ、かつ酸性から中性
又はアルカリ性に変化させ、該中性又はアルカリ性とな
りかつキレート性を消失した前記キレート剤液を、セメ
ントの水和反応水としてセメントに加えて水和させ、セ
メントペーストを形成し、該セメントペーストを固化さ
せることを特徴とする放射性汚染物の処理方法。1. A chelating agent for pollutants of radioactive pollutants.
It is blocked with a chelating agent solution formed from water and water, and the chelating agent solution containing this radioactive pollutant is electrolyzed with a direct current to eliminate the chelating property and from acidic to neutral.
Or, it is changed to alkaline and becomes neutral or alkaline.
The chelating agent solution that has lost its chelating property
A method for treating radioactive contaminants, which comprises adding water as hydration reaction water to cement and hydrating the cement to form a cement paste, and solidifying the cement paste.
内において行なわれる請求項１記載の放射性汚染物の処
理方法。2. The solidification of the cement paste is made of a metal container.
The method for treating radioactive contaminants according to claim 1, which is carried out in-house .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5255828A JP2553457B2 (en) | 1993-10-13 | 1993-10-13 | Radioactive contaminant treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5255828A JP2553457B2 (en) | 1993-10-13 | 1993-10-13 | Radioactive contaminant treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07110396A JPH07110396A (en) | 1995-04-25 |
| JP2553457B2 true JP2553457B2 (en) | 1996-11-13 |
Family
ID=17284178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5255828A Expired - Fee Related JP2553457B2 (en) | 1993-10-13 | 1993-10-13 | Radioactive contaminant treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2553457B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09101397A (en) * | 1995-10-02 | 1997-04-15 | Morikawa Sangyo Kk | Method and device for decomposing organic treatment liquid containing radioactive metal ion and method and device for extracting radioactive metal using the decomposition method and device |
| KR101011205B1 (en) * | 2008-08-05 | 2011-01-26 | 한국전력공사 | Method of treating organic matter and nitrogen oxide contained in saturated steam of radioactive liquid waste by using oxidation / reduction catalyst |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093999A (en) * | 1983-10-28 | 1985-05-25 | 日立プラント建設株式会社 | Processing method for chemical decontamination waste liquid |
-
1993
- 1993-10-13 JP JP5255828A patent/JP2553457B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07110396A (en) | 1995-04-25 |
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