JPH0484800A - Method of solidifying radioactive waste - Google Patents
Method of solidifying radioactive wasteInfo
- Publication number
- JPH0484800A JPH0484800A JP19793390A JP19793390A JPH0484800A JP H0484800 A JPH0484800 A JP H0484800A JP 19793390 A JP19793390 A JP 19793390A JP 19793390 A JP19793390 A JP 19793390A JP H0484800 A JPH0484800 A JP H0484800A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- solidification
- kneading
- water
- radioactive 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.)
- Pending
Links
- 239000002901 radioactive waste Substances 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 10
- 238000007711 solidification Methods 0.000 claims abstract description 18
- 230000008023 solidification Effects 0.000 claims abstract description 18
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 12
- 150000001875 compounds Chemical class 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 7
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 4
- 229920002545 silicone oil Polymers 0.000 claims description 3
- 229920000620 organic polymer Polymers 0.000 claims description 2
- 241000272814 Anser sp. Species 0.000 claims 1
- 229920000592 inorganic polymer Polymers 0.000 claims 1
- 239000003973 paint Substances 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 238000004898 kneading Methods 0.000 abstract description 12
- 239000011347 resin Substances 0.000 abstract description 11
- 229920005989 resin Polymers 0.000 abstract description 11
- 239000002699 waste material Substances 0.000 abstract description 11
- 239000004568 cement Substances 0.000 abstract description 8
- 239000007921 spray Substances 0.000 abstract description 6
- 239000004519 grease Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000003638 chemical reducing agent Substances 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 238000010422 painting Methods 0.000 abstract 3
- 239000000463 material Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000002925 low-level radioactive waste Substances 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は放射性廃棄物の固化方法に係り、特に耐水性の
優れた固化体を作製する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for solidifying radioactive waste, and particularly to a method for producing a solidified material with excellent water resistance.
原子力発電所、核燃料再処理施設から発生する濃縮廃液
、使用済イオン交換樹脂、雑固体などの、いわゆる、低
レベル放射性廃棄物の処理方法として、セメントや水ガ
ラス(ケイ酸アルカリ)等の無機固化材を用いて固化処
理することが知られている。Inorganic solidification of cement, water glass (alkali silicate), etc. is a treatment method for so-called low-level radioactive waste, such as concentrated waste liquid, used ion exchange resin, and miscellaneous solids generated from nuclear power plants and nuclear fuel reprocessing facilities. It is known that solidification treatment is performed using materials.
この様な目的で用いられる固化材は長期耐久性に優れて
おり、廃棄物固化体が水没するような悪条件下でもほと
んど劣化することが無い。しかし、更に耐久性を高める
ため特開昭60−202398号公報に記載されている
ように固化材に繊維を5%程度添加することも試みられ
ている。The solidifying material used for this purpose has excellent long-term durability and hardly deteriorates even under adverse conditions where the solidified waste material is submerged in water. However, in order to further improve the durability, attempts have been made to add about 5% of fiber to the solidifying material, as described in Japanese Patent Application Laid-Open No. 60-202398.
従来技術で述べた低レベル廃棄物のみでなく、廃棄物の
比放射能が一桁以上高い、いわゆる、中レベル廃棄物に
対しても、セメント等で固化した後に、陸地処分するこ
とが考案されている。この場合は、比放射能が高いこと
から固化体の耐久性を更に向上させ数百部から数千年間
、健全性を確保できるものであることが望ましい。In addition to the low-level waste mentioned in the conventional technology, it has been devised that so-called medium-level waste, which has a specific radioactivity of more than an order of magnitude, can be disposed of on land after being solidified with cement. ing. In this case, since the specific radioactivity is high, it is desirable to further improve the durability of the solidified material and ensure its integrity for several hundred to several thousand years.
従来の低レベル廃棄物固化体では固化体の水没後の耐久
性を考慮し、充分な性能を示していた。Conventional low-level solidified waste materials have shown sufficient performance considering the durability of the solidified materials after being submerged in water.
本発明の目的は、更に、長々期にわたり健全性を確保す
るために水没しても固化体そのものが水にさらされない
ような方法を考案し、もって長期安定固化体を作製でき
る放射性廃棄物の固化方法を提供することにある。A further object of the present invention is to devise a method in which the solidified material itself is not exposed to water even if it is submerged in water in order to ensure its health over a long period of time, and thereby to produce a long-term stable solidified material of radioactive waste. The object of the present invention is to provide a solidification method.
上記目的を達成するために、本発明は固化容器内に疎水
性物質を塗布する操作を行った後、固化処理することに
した。In order to achieve the above object, the present invention performs a solidification treatment after applying an operation of a hydrophobic substance in a solidification container.
疎水性物質はドラム缶あるいは内張リドラム缶の更に内
側に防水層を形成し、止水の多層構造を形成する。それ
によって外側から何らかの要因で水が浸入することがあ
っても、この薄い層が撥水効果を永久的に持つため、固
化体内部へ浸透するのを最大限防ぐことができる。よっ
て同化体の健全性は更に向上する。The hydrophobic substance forms a waterproof layer on the inner side of the drum or lined re-drum, forming a water-stopping multilayer structure. Even if water were to infiltrate from the outside for some reason, this thin layer has a permanent water-repellent effect, so it can be prevented to the maximum extent from penetrating into the solidified body. Therefore, the health of the assimilated body is further improved.
以下、本発明の一実施例を第1図により説明する。本実
施例は放射性廃樹脂を簡易固化するプロセスを例に上げ
ておく。原子力発電所あるいはその他原子力施設から排
出される廃樹脂は、廃樹脂タンク1に集められて保管さ
れている。廃樹脂は廃樹脂タンク1より脱水機2を介し
て水分調整した後、撹拌機7を持つ混線機6へ導入され
る。An embodiment of the present invention will be described below with reference to FIG. In this example, a process for simply solidifying radioactive waste resin will be exemplified. Waste resin discharged from a nuclear power plant or other nuclear facilities is collected and stored in a waste resin tank 1. The waste resin is fed from a waste resin tank 1 through a dehydrator 2 to adjust its moisture content, and then introduced into a mixer 6 having an agitator 7.
方、固化相系は、セメントサイロ3より所定量のセメン
トが、混練水タンク4より所定量の水が、添加剤ホッパ
5より減水剤、流動化剤等が所定量混練槽6へ導入され
る。混練槽6では撹拌機7により充分、かつ、均一に混
練される。On the other hand, in the solidification phase system, a predetermined amount of cement is introduced from the cement silo 3, a predetermined amount of water is introduced from the kneading water tank 4, and a predetermined amount of water reducing agent, fluidizing agent, etc. is introduced from the additive hopper 5 into the kneading tank 6. . In the kneading tank 6, the mixture is sufficiently and uniformly kneaded by the stirrer 7.
一方、固化容器側はあらかじめドラム缶の内側にセメン
ト、あるいは、PIC(ポリマ含浸コンクリート)が作
られている。本固化容器を可動装置を用いて前処理段階
へ導入する。ここでは疎水性化合物タンク8中にシリコ
ングリースの低粘度のものあるいはシリコンオイル又は
シリコンオイルとグリースの混合物が入っている。その
他の有効物質として、MMA (メタクリル酸樹脂)、
パラフィン類、等有機高分子化合物がある。しかし、作
業性及び同化材とのなじみ易さよりシリコン系疎水性化
合物が良い。疎水性化合物タンク8より疎水性化合物は
スプレー用動力9及びスプレーノズル10を介して固化
容器内壁面に塗布される。On the other hand, on the solidification container side, cement or PIC (polymer impregnated concrete) is already made inside the drum. The solidification container is introduced into the pretreatment stage using a mobile device. Here, the hydrophobic compound tank 8 contains a low viscosity silicone grease, silicone oil, or a mixture of silicone oil and grease. Other effective substances include MMA (methacrylic acid resin),
There are organic polymer compounds such as paraffins. However, silicone-based hydrophobic compounds are preferable in terms of workability and ease of compatibility with assimilable materials. The hydrophobic compound is applied from the hydrophobic compound tank 8 to the inner wall surface of the solidification container via a spray power 9 and a spray nozzle 10.
通常、ノズル及び動力の要因があるが、約30秒の塗布
で十分であることがわかった。約30秒の塗布の後、同
化容器11は可動装置により混練槽6の下部へ運ばれる
。ここで混練槽6より均質に固化材と混練された放射性
廃樹脂が注入され、同化体12を形成する。注入後、約
二週間で硬化はほぼ終了し、固化体内部塗布層同化容器
は完全に密着固化していることが確かめられた。Approximately 30 seconds of application has been found to be sufficient, although there are usually nozzle and power factors. After about 30 seconds of application, the assimilation vessel 11 is transported to the lower part of the kneading tank 6 by means of a mobile device. Here, the radioactive waste resin homogeneously kneaded with the solidifying material is injected from the kneading tank 6 to form the assimilated body 12. It was confirmed that curing was almost completed in about two weeks after the injection, and that the internal coating layer of the solidified material assimilated container was completely solidified.
本発明によれば、固化容器と放射性廃棄物固化部の間に
疎水性物質を導入して固化体を作成できるので、従来の
同化体に比べて、更に、耐水性が高い健全な固化体を容
易に作ることが可能となる。According to the present invention, since a hydrophobic substance can be introduced between the solidification container and the radioactive waste solidification section to create a solidified body, a healthy solidified body with higher water resistance can be created compared to conventional assimilated bodies. It can be easily made.
第1図は本発明の一実施例のブロック図である。
1・・・廃樹脂タンク、2・・・脱水機、3・・・セメ
ントサイロ、4・・混練水タンク、5・添加剤ホッパ、
6・・混練槽、7・・・撹拌機、8・・疎水性化合物タ
ンク、9・・・スプレー動力、1o スプレーノズル、
11固化容器、12・・・固化体。FIG. 1 is a block diagram of one embodiment of the present invention. 1... Waste resin tank, 2... Dehydrator, 3... Cement silo, 4... Kneading water tank, 5... Additive hopper,
6... Kneading tank, 7... Stirrer, 8... Hydrophobic compound tank, 9... Spray power, 1o spray nozzle,
11 solidification container, 12... solidification body.
Claims (1)
あらかじめ疎水性物質を塗布することを特徴とする放射
性廃棄物の固化方法。 2、請求項1において、前記疎水性物質は、ペイント、
油等有機高分子化合物あるいはシリコングース、シリコ
ン油等の無機高分子化合物である放射性廃棄物の固化方
法。 3、請求項1において、塗布する方法として、スプレー
、流し込みまたは直接刷毛等で塗る放射性廃棄物の固化
方法。[Claims] 1. A method for solidifying radioactive waste, which comprises applying a hydrophobic substance to the inside of a solidification container in advance when solidifying the radioactive waste. 2. In claim 1, the hydrophobic substance is paint,
A method for solidifying radioactive waste, which is an organic polymer compound such as oil or an inorganic polymer compound such as silicone goose or silicone oil. 3. A method for solidifying radioactive waste according to claim 1, in which the application method includes spraying, pouring, or directly applying with a brush.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19793390A JPH0484800A (en) | 1990-07-27 | 1990-07-27 | Method of solidifying radioactive waste |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19793390A JPH0484800A (en) | 1990-07-27 | 1990-07-27 | Method of solidifying radioactive waste |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0484800A true JPH0484800A (en) | 1992-03-18 |
Family
ID=16382705
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19793390A Pending JPH0484800A (en) | 1990-07-27 | 1990-07-27 | Method of solidifying radioactive waste |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0484800A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002332997A (en) * | 2001-05-10 | 2002-11-22 | Mitsubishi Electric Corp | Blower |
JP2006257933A (en) * | 2005-03-16 | 2006-09-28 | Mitsubishi Electric Corp | Air blowing device |
-
1990
- 1990-07-27 JP JP19793390A patent/JPH0484800A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002332997A (en) * | 2001-05-10 | 2002-11-22 | Mitsubishi Electric Corp | Blower |
JP2006257933A (en) * | 2005-03-16 | 2006-09-28 | Mitsubishi Electric Corp | Air blowing device |
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