JPS6158797B2 - - Google Patents
Info
- Publication number
- JPS6158797B2 JPS6158797B2 JP17078579A JP17078579A JPS6158797B2 JP S6158797 B2 JPS6158797 B2 JP S6158797B2 JP 17078579 A JP17078579 A JP 17078579A JP 17078579 A JP17078579 A JP 17078579A JP S6158797 B2 JPS6158797 B2 JP S6158797B2
- Authority
- JP
- Japan
- Prior art keywords
- radioactive waste
- drum
- powder
- plastic
- solidification
- 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
Links
- 239000002901 radioactive waste Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 18
- 239000004033 plastic Substances 0.000 claims description 13
- 229920003023 plastic Polymers 0.000 claims description 13
- 239000008187 granular material Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims 1
- 238000007711 solidification Methods 0.000 description 16
- 230000008023 solidification Effects 0.000 description 16
- 239000003795 chemical substances by application Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 238000005469 granulation Methods 0.000 description 6
- 230000003179 granulation Effects 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000003505 polymerization initiator Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- GEMHFKXPOCTAIP-UHFFFAOYSA-N n,n-dimethyl-n'-phenylcarbamimidoyl chloride Chemical compound CN(C)C(Cl)=NC1=CC=CC=C1 GEMHFKXPOCTAIP-UHFFFAOYSA-N 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Description
【発明の詳細な説明】
本発明は放射性廃棄物のインドラムプラスチツ
ク固化処理法に係る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for solidifying radioactive waste into indrum plastic.
放射性廃棄物の固化処理は、従来セメントによ
る固化法が広く行われていた。セメントにより固
化する場合には、水を必要とするために放射性廃
棄物固化体の発生量が多くなる欠点があつた。こ
のため、水を必要としないアスフアルト固化法が
導入された。しかし乍ら、アスフアルト固化法に
よる固化体は、可燃性であり、機械的強度が低い
と言う欠点があつた。 Conventionally, the solidification method using cement has been widely used to solidify radioactive waste. When solidifying with cement, water is required, which has the disadvantage of generating a large amount of solidified radioactive waste. For this reason, an asphalt solidification method that does not require water was introduced. However, the solidified material produced by the asphalt solidification method has the drawbacks of being flammable and having low mechanical strength.
最近、固化に際して水を必要とせず、しかも得
られる固化体が不燃性で機械的強度が大きな固化
処理法として、プラスチツク固化処理法が開発さ
れ注目されている。 Recently, a plastic solidification treatment method has been developed and is attracting attention as a solidification treatment method that does not require water during solidification, and the resulting solidified product is nonflammable and has high mechanical strength.
このプラスチツク固化法の中、熱硬化性樹脂を
使用するものは、セメント固化法と同様に放射性
廃棄物を常温で処理することができる。従つて、
熱硬化性樹脂による固化処理においてはインドラ
ム固化法の適用が可能である。 Among these plastic solidification methods, those that use thermosetting resins can treat radioactive waste at room temperature, similar to the cement solidification method. Therefore,
In solidification treatment using a thermosetting resin, an in-drum solidification method can be applied.
インドラム固化法では、ドラム中に熱硬化性樹
脂を収容し、乾燥処理して粉体化された放射性廃
棄物をドラム中に投入する必要があるが、投入に
際し放射性廃棄物の粉体の飛散があり非常に危険
である。 In the in-drum solidification method, it is necessary to store a thermosetting resin in a drum and to charge the dry and powdered radioactive waste into the drum. It is extremely dangerous.
本発明は上記の事情に鑑みなされたもので、放
射性廃棄物粉体の飛散のおそれなく固化処理が可
能なインドラムプラスチツク固化処理法を提供す
る。 The present invention has been made in view of the above-mentioned circumstances, and provides an in-drum plastic solidification treatment method that enables solidification treatment without fear of scattering of radioactive waste powder.
本発明においては、乾燥処理により粉体化した
放射性廃棄物を造粒処理によつて粒体化し、これ
をドラム中に投入する。これにより危険な放射性
粉体の飛散を生じることなく、インドラム固化処
理を行うことができる。 In the present invention, radioactive waste that has been pulverized by drying is granulated by granulation, and the granules are placed in a drum. As a result, in-drum solidification processing can be performed without causing dangerous scattering of radioactive powder.
以下図面につき本発明の詳細を説明する。第１
図において、放射性廃棄物貯蔵源（図示しない）
から供給された放射性廃液１は、堅型薄膜乾燥機
２において乾燥粉体化され、ホツパ３に一時的に
貯溜される。前記粉体はホツパ３からスクリユー
フイーダ４によつて撹拌造粒機５に定量供給され
る。撹拌造粒機５にはタンク６から造粒用のバイ
ンダが供給されている。 The invention will be explained in detail below with reference to the drawings. 1st
In the figure, a radioactive waste storage source (not shown)
The radioactive waste liquid 1 supplied from the hopper 3 is dried and powdered in the vertical thin film dryer 2 and temporarily stored in the hopper 3. The powder is quantitatively fed from the hopper 3 to the stirring granulator 5 by the screw feeder 4. The stirring granulator 5 is supplied with a binder for granulation from a tank 6.
撹拌造粒機５で粒体化された放射性廃棄物はド
ラム７に送られる。ドラム７には、プラスチツク
固化剤貯蔵タンク８から固化剤が定量供給されて
いる。なお、ドラム７内には撹拌機９のロータが
配置されている。また、ドラム７にはタンク１０
から重合開始剤が、タンク１１から促進剤がそれ
ぞれ適時に供給されるようになつている。 The radioactive waste granulated by the stirring granulator 5 is sent to the drum 7. The drum 7 is supplied with a fixed amount of solidifying agent from a plastic solidifying agent storage tank 8. Note that a rotor of an agitator 9 is arranged inside the drum 7. Also, the drum 7 has a tank 10.
The polymerization initiator is supplied from the tank 11, and the accelerator is supplied from the tank 11 in a timely manner.
上記構成の装置において、本発明固化処理法は
次のようにして実施される。すなわち、撹拌造粒
機５において、粉体はバインダの添加により粉体
飛散のない一定粒径の粒体とされる。一方、ドラ
ム７中にはタンク８から予め一定量のプラスチツ
ク固化剤が供給されており、前記の粒体化された
放射性廃棄物はドラム７中に投入される。上下運
動はドラムの混合位置への移動取り去りに使う。 In the apparatus having the above configuration, the solidification treatment method of the present invention is carried out as follows. That is, in the stirring granulator 5, the powder is made into granules of a constant particle size without powder scattering by adding a binder. On the other hand, a certain amount of plastic solidifying agent is previously supplied into the drum 7 from a tank 8, and the granulated radioactive waste is introduced into the drum 7. The up and down motion is used to move the drum into and out of the mixing position.
撹拌機９は軸方向の運動をもなし得るものであ
り、ドラム７内のロータは固化剤と放射性廃棄物
とを充分均一に混合する。混合が終了した所で、
タンク１０，１１から重合開始剤および促進剤が
供給され、固化剤を重合固化させプラスチツク固
化体とする。 The stirrer 9 is also capable of axial movement, and the rotor in the drum 7 mixes the solidification agent and the radioactive waste sufficiently uniformly. Once the mixing is complete,
A polymerization initiator and an accelerator are supplied from tanks 10 and 11, and the solidifying agent is polymerized and solidified to form a solidified plastic.
上記のように本発明においては、放射性廃棄物
を粒体化してドラム中に投入しているので、危険
な放射性粉体の飛散を生じることはない。 As described above, in the present invention, the radioactive waste is granulated and put into the drum, so there is no risk of dangerous radioactive powder scattering.
原子力発電所における主放射性廃棄物の一つに
パウデツクススラリーがある。
Powdex slurry is one of the main radioactive wastes produced at nuclear power plants.
この廃棄物は堅型薄膜乾燥機２により容易に乾
燥され粉体化される。ところがその粉体粒径は数
十ミクロンであり、非常に飛散し易い。 This waste is easily dried and powdered by the rigid thin film dryer 2. However, the particle size of the powder is several tens of microns, and it is extremely easy to scatter.
この粉体約２Kgを撹拌造粒機５に送込み、流動
化する。ここに、バインダとして約35％の水ガラ
ス溶液を一定量供給すると、造粒が開始される。
バインダの添加量は20％〜25％の範囲が適当であ
り、造粒の結果一定粒径範囲のパウデツクス粒体
が得られる。第２図は乾燥パウデツクス粉体と、
造粒後のパウデツクス粒体の粒径分布を示してい
る。この図から粒体の粒径は粉体のそれより大巾
に大きくなつていることがわかる。 Approximately 2 kg of this powder is sent to the stirring granulator 5 and fluidized. When a certain amount of approximately 35% water glass solution is supplied as a binder, granulation is started.
The amount of binder added is suitably in the range of 20% to 25%, and as a result of granulation, powder dex granules having a fixed particle size range can be obtained. Figure 2 shows dry powdered powder and
It shows the particle size distribution of the powderex granules after granulation. It can be seen from this figure that the particle size of the granules is much larger than that of the powder.
パウデツクス粒体はドラム７中に投下される
が、前記のように粒径が粉体のそれに比し著しく
大となつているため、投下に際し飛散することは
ない。 The powder dex granules are dropped into the drum 7, but as mentioned above, the particle size is significantly larger than that of the powder, so they do not scatter when dropped.
ドラム７において、パウデツクス粒体は同じ重
量のプラスチツク固化剤、例えば不飽和ポリエス
テル樹脂と混合され、均一に混合された後、メチ
ル、エチル、ケトン、パーオキサイド等の重合開
始剤、ナフテン酸コバルト等の促進剤が添加され
る。それらの添加量はそれぞれ０・５％〜数％で
よい。 In drum 7, the powder granules are mixed with the same weight of a plastic solidifying agent, such as an unsaturated polyester resin, and after uniform mixing, a polymerization initiator such as methyl, ethyl, ketone, peroxide, cobalt naphthenate, etc. An accelerator is added. The amount of each addition may be from 0.5% to several %.
添加剤の添加により重合硬化反応が開始、進行
されプラスチツク固化体が得られる。得られる固
化体は500Kg／cm2以上の圧縮強度を示し、難燃性
であり、放射性廃棄物固化体として優れた性質を
有する。 By adding the additive, a polymerization curing reaction is initiated and progresses, and a solidified plastic product is obtained. The obtained solidified material has a compressive strength of 500 kg/cm 2 or more, is flame retardant, and has excellent properties as a radioactive waste solidified material.
なお、本発明は上記実施例のみに限定されな
い。すなわち、放射性廃棄物は例示のパウデツク
ス以外であつてもよいし、また造粒工程において
添加する水ガラスをプラスチツク固化剤の一成分
となり得る難燃性プラスチツクで置換してもよ
い。 Note that the present invention is not limited to the above embodiments. That is, the radioactive waste may be other than the exemplified powder, and the water glass added in the granulation process may be replaced with a flame-retardant plastic that can be a component of the plastic solidifying agent.
第１図は本発明を実施する装置の一例を示す模
式図、第２図はパウデツクス粉体およびパウデツ
クス粒体の粒径分布を示す線図である。
２……堅型薄膜乾燥機、５……撹拌造粒機、７
……ドラム、９……撹拌機。
FIG. 1 is a schematic diagram showing an example of an apparatus for carrying out the present invention, and FIG. 2 is a diagram showing the particle size distribution of powdered powder and powdered powder. 2... Rigid thin film dryer, 5... Stirring granulator, 7
...Drum, 9...Agitator.
Claims (1)
の工程により得られた放射性廃棄物粉体を撹拌造
粒する工程と、この工程により得られた放射性廃
棄物粒体をドラム中においてプラスチツク固化剤
と撹拌混合する工程と、混合終了後適宜添加剤を
加え固化させる工程とを有する放射性廃棄物のイ
ンドラムプラスチツク固化処理法。1 A process of drying and pulverizing radioactive waste, a process of stirring and granulating the radioactive waste powder obtained in this process, and solidifying the radioactive waste granules obtained in this process into plastic in a drum. A method for solidifying radioactive waste into indrum plastics, which comprises a step of stirring and mixing with a radioactive waste and a step of adding and solidifying an appropriate additive after mixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17078579A JPS5693096A (en) | 1979-12-27 | 1979-12-27 | Radioactive waste indrum plastic solidification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17078579A JPS5693096A (en) | 1979-12-27 | 1979-12-27 | Radioactive waste indrum plastic solidification method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5693096A JPS5693096A (en) | 1981-07-28 |
| JPS6158797B2 true JPS6158797B2 (en) | 1986-12-13 |
Family
ID=15911317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17078579A Granted JPS5693096A (en) | 1979-12-27 | 1979-12-27 | Radioactive waste indrum plastic solidification method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5693096A (en) |
-
1979
- 1979-12-27 JP JP17078579A patent/JPS5693096A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5693096A (en) | 1981-07-28 |
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