JPS59126298A - Container for finally disposing radioactive waste - Google Patents
Container for finally disposing radioactive wasteInfo
- Publication number
- JPS59126298A JPS59126298A JP64283A JP64283A JPS59126298A JP S59126298 A JPS59126298 A JP S59126298A JP 64283 A JP64283 A JP 64283A JP 64283 A JP64283 A JP 64283A JP S59126298 A JPS59126298 A JP S59126298A
- Authority
- JP
- Japan
- Prior art keywords
- container
- radioactive waste
- concrete
- impregnated
- final disposal
- 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.)
- Pending
Links
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は放射性廃棄物の最終固化処理技術に係p、%に
放射性廃棄物を充填固化して長期間安定に保管するだめ
の最終処分用容器に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a final solidification treatment technology for radioactive waste. Regarding.
従来、放射性廃棄物の最終同化処理はドラム缶に廃棄物
を充填した上でセメント固化、アスファルト固化または
プラスチク固化することが研究・実施されて来た。しか
し、ドラム缶では腐食等の問題が生じ、長期安定保管は
困難である。そこで、長期安定性に優れた無機素材とし
て汎用性、強度等の面で良好なコンクリート系容器に放
射性廃棄物を充填固化することが有力視されている。無
機物は長期安定性の面で(1)物性の変化がない、0)
外界微生物の影響を受け々い、(3)物理化学的変化が
ない、等の特徴を有し、最終処分固化容器として有利で
ある。Conventionally, the final assimilation treatment of radioactive waste has been researched and implemented by filling drums with the waste and solidifying it with cement, asphalt, or plastic. However, drum cans suffer from problems such as corrosion, making long-term stable storage difficult. Therefore, filling and solidifying radioactive waste in concrete-based containers, which are good in terms of versatility and strength as an inorganic material with excellent long-term stability, is considered to be a promising option. In terms of long-term stability, inorganic substances have (1) no change in physical properties, 0)
It has characteristics such as not being affected by external microorganisms and (3) no physicochemical changes, and is advantageous as a final disposal solidification container.
しかしコンクリートは、そのままでは微視的に多孔質で
あるため放射性廃棄物処分用容器としては密封保持性に
難があり、且つ強度、耐水性、耐薬品性、耐放射性元素
浸出性が不充分であるという欠点がある。その対策とし
てコンクリート容器の厚肉化が考えられるが、これは放
射性廃棄物固化処理においては廃棄物の減容比の点で致
命的に不利になるので推奨される対策ではない。However, since concrete is microscopically porous as it is, it is difficult to keep it sealed as a container for radioactive waste disposal, and it also has insufficient strength, water resistance, chemical resistance, and resistance to radioactive elements leaching. There is a drawback. One possible countermeasure is to make the concrete container thicker, but this is not a recommended measure as it would be fatally disadvantageous in terms of waste volume reduction ratio in radioactive waste solidification treatment.
本発明は、前記コンクリートの欠点を除去し、放射性廃
棄物を長期安定に充填固化保管するに適し−た放射性廃
棄物最終処分用の比較的薄肉のコンクリート系容器を提
供することを目的とする。An object of the present invention is to eliminate the drawbacks of concrete and provide a relatively thin concrete container for final disposal of radioactive waste, which is suitable for filling and solidifying radioactive waste in a stable manner over a long period of time.
コンクリ−かは、そのままでは放射性廃棄物最終処分容
器として前述の欠点を有するが、同容器として最も重要
な性質で〜ある長期安定性の面では好適な材料である。Although concrete has the aforementioned drawbacks as a final disposal container for radioactive waste, it is a suitable material in terms of long-term stability, which is the most important property for containers.
そこでコンクリートの上記利点を維持しながらその前述
の欠点を改善することを考えるに、該欠点はコンクリー
トの多孔性に起因するものでラシ、内部の微細空隙を埋
めることによシ解決し得る。Therefore, considering improving the above-mentioned disadvantages of concrete while maintaining the above-mentioned advantages of concrete, the disadvantages are caused by the porosity of concrete and can be solved by filling the microscopic voids inside the concrete.
そこで本発明による放射性廃棄物最終処分用容器は、粘
性が比較的低く、空隙への含浸性が優れ、且つ含没後空
隙内で重合して強固な組織を形成する有機ポリマーを含
浸させたコンタリートをドラム缶に比較的薄肉に内巻き
し、該ポリマーでコンクリート内部の空隙を埋めたこと
を特徴とするものである。含浸させる有機ポリマーとし
ては、メチルメタクリレート、スチレン、アクリルニト
リ上゛記の如く構成した容器は有機物を含有しているこ
とになるが、その含有率は数チ程度に抑えることが可能
であシ、容器の骨格構造はコンクリートであって容器全
体としては無機物の前記利点を維持していると共に、含
浸された有機ポリマーもコンクリート内部の微細空隙内
で重合固化する結果、単独成型品よシも強固且つ安定し
た特性が得られ、これらが相まって、放射性廃棄物最終
処分用容器として長期安定性の維持、及び強度、耐水性
、耐薬品性、耐放射性元素浸出性の改善が可能となシ、
容器の薄肉化も可能となって廃棄物の減容比を高くする
ことができる。Therefore, the container for final disposal of radioactive waste according to the present invention is made of contourite impregnated with an organic polymer that has relatively low viscosity, has excellent impregnation properties into the voids, and polymerizes within the voids to form a strong structure after impregnation. It is characterized in that it is wrapped relatively thinly inside a drum and the voids inside the concrete are filled with the polymer. Examples of organic polymers to be impregnated include methyl methacrylate, styrene, and acrylonitrile.Although the container constructed as described above contains an organic substance, the content can be kept to a few polymers. The skeletal structure of the container is concrete, and the container as a whole maintains the above-mentioned advantages of inorganic materials, and as a result of the impregnated organic polymer polymerizing and solidifying within the microscopic voids inside the concrete, it is strong and solid even when it is a single molded product. Stable properties can be obtained, and these together make it possible to maintain long-term stability as a container for final disposal of radioactive waste, and improve strength, water resistance, chemical resistance, and radioactive element leaching resistance.
It is also possible to make the container thinner, and the volume reduction ratio of waste can be increased.
本発明に係る放射性廃棄物最終処分容器の実施例を第1
図に断、面図として示す。図において、1はドラム缶、
21記列挙したメチルメタクリレート等の有機ポリマー
を微少量含浸させたコンク固化して最終処分の用に共す
るものである。該放射性廃棄物の同化はペレット固化、
均質固化のいずれでもよく、また同化材の種類について
も制限はない。The first embodiment of the final disposal container for radioactive waste according to the present invention is described below.
It is shown in the figure as a cross section and a side view. In the figure, 1 is a drum;
The concrete is impregnated with a small amount of organic polymer such as methyl methacrylate listed in item 21, solidified, and used for final disposal. Assimilation of the radioactive waste involves pellet solidification,
Any homogeneous solidification may be used, and there are no restrictions on the type of assimilated material.
例として、有機ポリマーであるメチルメタクリレートを
微少量(数チのオーダー)だけコンクリートに含浸させ
た供試体について得られた特性改善は下記の如くである
。As an example, the improvement in properties obtained for a specimen in which concrete was impregnated with a very small amount (on the order of a few inches) of methyl methacrylate, an organic polymer, is as follows.
0)強度の向上
直径10crn1高さ20mの供試体について、有機ポ
リマー含浸度合による圧縮強度の変化を第2図に示す。0) Improvement in strength Figure 2 shows the change in compressive strength depending on the degree of organic polymer impregnation for a specimen with a diameter of 10 crn and a height of 20 m.
本図に示される如く、規定量のポリマーを含浸させるこ
とによシ、非含浸の場合に比べて約4倍だけ圧縮強度が
向上する。なお、供試体の中心まで含浸した場合をもっ
て含浸率100%としている。As shown in this figure, by impregnating a specified amount of polymer, the compressive strength is improved by about 4 times compared to the case without impregnation. Note that the impregnation rate is defined as 100% when the sample is impregnated to the center.
(2)耐薬品性の向上
辺4crn、高さ16crnの角形の供試体を2wt%
H2SO4溶液に浸漬したときの重量変化を第3図に示
す。有機ポリマーを含浸させることにより、非含浸のコ
ンクリートに比べて約1/3の重量変、化となシ、耐薬
品性が向上することが本図から明らかで1ある。(2) Improving chemical resistance A rectangular specimen with a side of 4 crn and a height of 16 crn of 2 wt%
Figure 3 shows the weight change when immersed in H2SO4 solution. It is clear from this figure that by impregnating the concrete with an organic polymer, the weight change is reduced to about 1/3 compared to non-impregnated concrete, and the chemical resistance is improved1.
(3)耐海水性(耐水性)の向上
直径I Q cm 、高さ20iニアF!の供試体の海
水浸漬時の重l変化を第4図に示す。有機ポリマー含浸
によシ、非含浸のものに比べて重量変化は約1/6に抑
えられ、耐海水性(耐水性)が向上することが本図から
明らかである。(3) Improved seawater resistance (water resistance) Diameter I Q cm, height 20i Near F! Figure 4 shows the change in weight of the specimen when immersed in seawater. It is clear from this figure that by impregnating an organic polymer, the weight change is suppressed to about 1/6 compared to that without impregnation, and the seawater resistance (water resistance) is improved.
゛(4)耐久性の向上
辺4 on 、尚さ16crnの角形の供試体の凍結・
融解230サイクル実行後の全細孔量は、コンクリート
容積1 ccに対する細孔量容積ccで表わすと有機ポ
リマー含浸供試体では2’O〜40X:1.Oct /
cc 、非含浸のものでは203 X 1.Occ/
ccであった。゛(4) Improving durability Freezing of a rectangular specimen with sides 4 on and 16 crn
The total pore volume after 230 cycles of melting is expressed as pore volume volume cc relative to concrete volume 1 cc, and is 2'O to 40X:1. Oct /
cc, 203 X 1. for non-impregnated ones. Occ/
It was cc.
これよシ、有機ポリマー含浸によシ非含浸の場合に比し
て約1/lO・の細孔量とすることができ、耐久性向上
が図れることが明らかである。It is clear that by impregnating the organic polymer, the pore volume can be reduced to about 1/lO· compared to the case without impregnation, and the durability can be improved.
有1機ポリマー含浸コンクリートは上述のようにコンク
リートそのままの素材の欠点をカッ々−する長所を有す
るものであシ、これを第1図の如くドラム缶に内巻きす
ることによって、性質・性能の優れた放射性廃棄物最終
充填固化処分用の容器が形成される。As mentioned above, organic polymer-impregnated concrete has the advantage of overcoming the disadvantages of raw concrete, and by wrapping it inside a drum as shown in Figure 1, it has excellent properties and performance. A container for final filling and solidification of radioactive waste will be formed.
本発明による放射性廃棄物最終処分用容器は下記の効果
を奏するものである。The container for final disposal of radioactive waste according to the present invention has the following effects.
(1)耐水性、耐薬品性、耐久性、耐放射性元素浸出性
等を向上させつつ無機材料の特性たる物性の長期安定性
を保有させることができる。(1) It is possible to maintain the long-term stability of physical properties, which is a characteristic of inorganic materials, while improving water resistance, chemical resistance, durability, radiation resistance, element leaching resistance, etc.
(2)容器内に放射性廃棄物を充填し固化材で固化させ
た固化体とした場合、容器自体の向上した強度及び容器
と固化体との一体構造化の相乗によシ、コンクリート内
巻の薄肉化を図ることが可能であり、従って廃棄物の減
容比を高く保つことができる。(2) When a container is filled with radioactive waste and solidified with a solidifying material, the strength of the container itself and the synergy of the integrated structure of the container and solidified material are improved, and the inner volume of the concrete increases. It is possible to make the wall thinner, and therefore the waste volume reduction ratio can be kept high.
(3) ドラム缶内側に有機ポリマー含浸コンクリー
ト内巻きを形成する過程において、コンクリートとドラ
ム缶との接触面での毛細管現象のため該接触面に有機ポ
リマーの薄膜が形成され、このた性が更に優れたものに
なる。(3) In the process of forming the inner wrapping of organic polymer-impregnated concrete inside the drum, a thin film of organic polymer is formed on the contact surface due to capillary action at the contact surface between the concrete and the drum, which further improves this property. Become something.
(4) この最終処分用容器は、それに充填した放射
性廃棄物を固化させる固化材の選定に広い自由度を与え
ることができる。特に耐水性にやや乏しい無機固化材の
使用を可能ならしめるので、容器壁が主として無機質で
あることと相俟って、結果として得られる容器及び同化
材を含む全体としての固化体は、固化体としては理想的
な無機質固−化体となシ得る。(4) This final disposal container allows a wide degree of freedom in selecting the solidification material for solidifying the radioactive waste filled in it. In particular, this makes it possible to use inorganic solidifying materials which have rather poor water resistance, so that, in combination with the fact that the container walls are primarily inorganic, the resulting solidified body as a whole, including the container and assimilated material, has a relatively low water resistance. It can be used as an ideal solidified inorganic material.
上記0)について数行すると、現在検討ないし実用され
ている固化材には、無機物としてはセメント、水ガラス
があシ、有機物としてはアスファルト、プラスチフスが
ある。前者は無機物ゆえ物性の長期安定及び低コストと
いう利点がある反面耐水性ひいては耐放射性元素浸出性
に劣るという欠点がある。後者のうち、アスファルトは
低コストであるが強度、形状変化、耐熱性、膨潤特性の
面で難点があ夛、プラスチフスは諸物件に優れているが
高コストであシ、且つ有機物ゆえ長期耐久性に不安が残
るという欠点がある。A few words about 0) above: Solidifying materials currently being studied or put into practice include cement and water glass ashes as inorganic materials, and asphalt and plastyphus as organic materials. The former has the advantage of long-term stability of physical properties and low cost because it is an inorganic material, but has the disadvantage of being inferior in water resistance and radiation resistance. Of the latter, asphalt is low cost, but has many drawbacks in terms of strength, shape change, heat resistance, and swelling properties, while plastyphus is excellent for various materials, but is expensive, and because it is an organic material, it has long-term durability. The downside is that there is still anxiety about sexuality.
本発明においては、固化体に要求される耐水性、耐熱−
性、耐久性及びこれらの長期安定性を容器の物性に委ね
、強度は固化体全体に委ねることにより、コスト以外の
上記各固化材の欠点が緩和されるので固化材の選定の自
由度が増すのである。とシわけ、無機固化材の使用を可
能にすることは、廃棄物の無機化と併用すれば廃棄物、
容器及び固化材からなる固化体の完全無機質化の実現を
もたらし、放射性固体廃棄物の最終処分において最も重
畳な固化体物性の長期安定性を確保する上で極めて有意
義である。In the present invention, the water resistance and heat resistance required for the solidified body are
By leaving durability, durability, and long-term stability to the physical properties of the container, and leaving the strength to the solidified product as a whole, the disadvantages of each solidifying material other than cost are alleviated, increasing the degree of freedom in selecting a solidifying material. It is. In other words, making it possible to use inorganic solidification materials means that if used in conjunction with the mineralization of waste,
This is extremely meaningful in achieving complete mineralization of the solidified material consisting of the container and the solidifying material, and ensuring the long-term stability of the physical properties of the solidified material, which is the most important factor in the final disposal of radioactive solid waste.
第1図は本発明を実施した放射性廃棄物最終処分用容器
の断面図、第2図〜第4図はメチルメタクリレートを含
浸させた及び含浸させてない各コンクリート供試体に基
づくテスト結果であって、第2図は含障率と圧縮強度と
の関係、第3図は供試体の硫酸溶液浸漬期間と重量変化
との関係、第4図は供試体の海水浸漬期間と重量変化と
の関係を示す。
1・・・ドラム缶
2・・・メチルメタクリレート含浸コンクリートの薄肉
内巻き
3・・・放射性廃棄物及び固化材よシなる充填物第2図
ポリマー含浸率 (%)
第3図
浸漬開開(週)
浸)置時間(週)Figure 1 is a cross-sectional view of a final disposal container for radioactive waste in which the present invention is implemented, and Figures 2 to 4 are test results based on concrete specimens impregnated with and not impregnated with methyl methacrylate. , Figure 2 shows the relationship between failure rate and compressive strength, Figure 3 shows the relationship between the period of immersion of the specimen in sulfuric acid solution and weight change, and Figure 4 shows the relationship between the period of immersion of the specimen in seawater and weight change. show. 1... Drum 2... Thin inner wrapping of methyl methacrylate impregnated concrete 3... Filling made of radioactive waste and solidifying material Figure 2 Polymer impregnation rate (%) Figure 3 Immersion opening (weeks) Soaking time (weeks)
Claims (1)
放射性廃棄物最終処分用容器であって、粘性が比較的低
くてコンクリート内部中、隙への浸透性が良く且つ含浸
後に該空隙内で重合して強固な組織を形成する有機ポリ
マーを含浸させたコンクリートの薄肉層でドラみ缶の内
面を内巻きしてなることを特徴とする放射性廃棄物最終
処分用容器0This is a container for final disposal of radioactive waste in which radioactive waste is filled and solidified together with a solidifying material.It has a relatively low viscosity and has good permeability into the voids inside the concrete, and it polymerizes within the voids after impregnation. A container for final disposal of radioactive waste, characterized in that the inner surface of a drum can is wrapped in a thin layer of concrete impregnated with an organic polymer that forms a strong structure.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP64283A JPS59126298A (en) | 1983-01-06 | 1983-01-06 | Container for finally disposing radioactive waste |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP64283A JPS59126298A (en) | 1983-01-06 | 1983-01-06 | Container for finally disposing radioactive waste |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59126298A true JPS59126298A (en) | 1984-07-20 |
Family
ID=11479354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP64283A Pending JPS59126298A (en) | 1983-01-06 | 1983-01-06 | Container for finally disposing radioactive waste |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59126298A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6210700U (en) * | 1985-07-04 | 1987-01-22 | ||
JPS62126800U (en) * | 1986-01-31 | 1987-08-11 | ||
US4828761A (en) * | 1988-05-04 | 1989-05-09 | The United States Of America As Represented By The United States Department Of Energy | Process for impregnating a concrete or cement body with a polymeric material |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5073097A (en) * | 1973-11-05 | 1975-06-17 | ||
JPS53148698A (en) * | 1977-05-30 | 1978-12-25 | Japan Atom Energy Res Inst | Treatment and disposal container of radioactive waste and industrial waste |
JPS563500A (en) * | 1979-06-22 | 1981-01-14 | Mitsubishi Electric Corp | Battery backup circuit for memory |
JPS57196198A (en) * | 1981-05-29 | 1982-12-02 | Tokyo Shibaura Electric Co | Method of processing radioactive waste plastic solidified body |
JPS5985999A (en) * | 1982-11-08 | 1984-05-18 | 秩父セメント株式会社 | Multiple container and its manufacture |
-
1983
- 1983-01-06 JP JP64283A patent/JPS59126298A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5073097A (en) * | 1973-11-05 | 1975-06-17 | ||
JPS53148698A (en) * | 1977-05-30 | 1978-12-25 | Japan Atom Energy Res Inst | Treatment and disposal container of radioactive waste and industrial waste |
JPS563500A (en) * | 1979-06-22 | 1981-01-14 | Mitsubishi Electric Corp | Battery backup circuit for memory |
JPS57196198A (en) * | 1981-05-29 | 1982-12-02 | Tokyo Shibaura Electric Co | Method of processing radioactive waste plastic solidified body |
JPS5985999A (en) * | 1982-11-08 | 1984-05-18 | 秩父セメント株式会社 | Multiple container and its manufacture |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6210700U (en) * | 1985-07-04 | 1987-01-22 | ||
JPS62126800U (en) * | 1986-01-31 | 1987-08-11 | ||
US4828761A (en) * | 1988-05-04 | 1989-05-09 | The United States Of America As Represented By The United States Department Of Energy | Process for impregnating a concrete or cement body with a polymeric material |
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