JPS6158798B2 - - Google Patents
Info
- Publication number
- JPS6158798B2 JPS6158798B2 JP17078679A JP17078679A JPS6158798B2 JP S6158798 B2 JPS6158798 B2 JP S6158798B2 JP 17078679 A JP17078679 A JP 17078679A JP 17078679 A JP17078679 A JP 17078679A JP S6158798 B2 JPS6158798 B2 JP S6158798B2
- Authority
- JP
- Japan
- Prior art keywords
- drum
- radioactive waste
- plastic
- powder
- 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 17
- 238000000034 method Methods 0.000 claims description 15
- 239000004033 plastic Substances 0.000 claims description 14
- 229920003023 plastic Polymers 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000005469 granulation Methods 0.000 claims description 9
- 230000003179 granulation Effects 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 239000008187 granular material Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 238000010298 pulverizing process Methods 0.000 claims 1
- 238000007711 solidification Methods 0.000 description 13
- 230000008023 solidification Effects 0.000 description 13
- 239000011230 binding agent Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 239000007809 chemical reaction catalyst Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 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
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002699 waste material 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
- 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 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 239000002925 low-level radioactive waste Substances 0.000 description 1
- 239000000203 mixture Substances 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
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000004062 sedimentation 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
- 229920006305 unsaturated polyester Polymers 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Description
【発明の詳細な説明】
本発明は低レベル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 low-level radioactive waste into indrum plastics.
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。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。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。インドラム固化法では、ドラ
ム中に熱硬化法樹脂を収容し、乾燥処理して粉体
化された放射性廃棄物をドラム缶中に投入する必
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。 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. 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. 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 the solidification treatment using a thermosetting resin, the in-drum solidification method can be applied. In the in-drum solidification method, it is necessary to store thermosetting resin in a drum, and then to put the radioactive waste that has been dried and powdered into a drum can. It is extremely dangerous.
さらに、インドラムで放射性廃棄物とプラスチ
ツク固化剤とを混合する撹拌機のロータが廃棄物
により汚染されるので、ロータの洗滌が必要とな
る。 In addition, the rotor of the stirrer that mixes the radioactive waste and the plastic solidifying agent in the in-drum becomes contaminated with waste, making it necessary to clean the rotor.
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がなく、また放射
性廃棄物によつて汚染される撹拌機を使用しない
放射性廃棄物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 circumstances, and provides a method for solidifying radioactive waste into in-drum plastic without the risk of scattering of radioactive waste powder and without using an agitator that is contaminated by radioactive waste. provide.
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
ドラム中に投入しドラムには振動を加え内容物を
混合する。これにより放射性粉体の飛散はなくな
り、撹拌機ロータの洗滌は不必要となる。 In the present invention, radioactive waste that has been pulverized by drying is granulated by granulation, which is then put into a drum, and the drum is vibrated to mix the contents. This eliminates the scattering of radioactive powder and eliminates the need for cleaning the agitator rotor.
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. In FIG. 1, radioactive waste liquid 1 supplied from a radioactive waste storage source (not shown) is dried and powdered in a vertical thin film dryer 2, and temporarily stored in a 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には加振機９の出力軸が連結
されている。また、ドラム７にはタンク１０から
重合反応触媒がタンク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 an output shaft of a vibrator 9 is connected to the drum 7. Further, the drum 7 is supplied with a polymerization reaction catalyst from a tank 10 and a promoter from a tank 11 at appropriate times.
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からプラスチツク固化剤が予
め一定量供給されており、ここでドラム７には加
振機９により振動が加えられ、重合反応触媒、促
進剤を添加し振動により均一に混合し、ここに前
記造粒した放射性廃棄物粒体を投入し、重合硬化
を進行させ、固化体を得る。 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 supplied in advance from a tank 8 into the drum 7, and the drum 7 is vibrated by a vibrator 9, and the polymerization reaction catalyst and accelerator are added to the drum 7, and the vibration makes it uniform. The granulated radioactive waste granules are added thereto to proceed with polymerization and hardening to obtain a solidified material.
上記のように本発明においては、放射性廃棄物
を粒体にしてドラム中に投入するので、危険な放
射性粉体の飛散を生じることはない。また、加振
機はドラム内容物と非接触に保持されているの
で、従来の撹拌ロータの如き汚染除去のための洗
滌を必要としない。 As described above, in the present invention, the radioactive waste is granulated and put into the drum, so there is no risk of scattering of dangerous radioactive powder. Furthermore, since the vibrator is held in a non-contact manner with the contents of the drum, there is no need for cleaning to remove contamination, as is the case with conventional stirring rotors.
使用ずみイオン交換樹脂を堅軸薄膜乾燥機２に
より乾燥粉体化し、この粉体にバインダとして
35wt％水ガラス水溶液を加えて撹拌造粒機５に
より造粒する。バインダの添加割合は、バインダ
粉体＝0.4〜0.8（500c.c.／２Kg〜600c.c.／２Kg）と
する。この時の造粒積算分布は第２図に示されて
いる。
The used ion exchange resin is dried and powdered using a hard shaft thin film dryer 2, and this powder is added as a binder.
A 35wt% water glass aqueous solution is added and granulated using a stirring granulator 5. The addition ratio of the binder is binder powder = 0.4 to 0.8 (500 c.c./2 Kg to 600 c.c./2 Kg). The granulation cumulative distribution at this time is shown in FIG.
プラスチツク固化剤としては、不飽和ポリエス
テルとスチレンを重量割合で、６：４に混合した
ものを使用し、重合反応触媒としてはナフテン酸
コバルト、MEKを１％加える。 As a plastic solidifying agent, a mixture of unsaturated polyester and styrene in a weight ratio of 6:4 is used, and as a polymerization reaction catalyst, 1% of cobalt naphthenate and MEK are added.
造粒前の粉体粒径は10μ程度であるが、造粒後
の粒体粒径は約１mmとなり、ドラム中のプラスチ
ツク固化剤内での沈降速度は7.8Kg／min程度で
ある。投下された粒体は固化剤液面に山状に堆積
するので、加振機９によりドラム７に振動を加え
前記の堆積をくずし、液面全体にひろげる。 The powder particle size before granulation is about 10μ, but after granulation the particle size is about 1 mm, and the sedimentation rate within the plastic solidifying agent in the drum is about 7.8 kg/min. Since the dropped particles are deposited in a mountain shape on the solidifying agent liquid surface, the drum 7 is vibrated by the vibrator 9 to break up the deposits and spread over the entire liquid surface.
ドラム内の200のプラスチツク固化剤中に
は、250Kg程度の放射性廃棄物粒体を充填するこ
とができ、その全量が固化剤中に沈降するには15
分から20分の時間を要する。 Approximately 250 kg of radioactive waste granules can be filled into 200 plastic solidifiers in the drum, and it takes 15 kg for the entire amount to settle into the solidifier.
It takes between 20 minutes and 20 minutes.
固化後のプラスチツク固化体の比重は、1.28造
粒粉の重量割合は0.52、もとの廃棄物粉体は0.47
ｇ／cm3の密度で固化体中に広がつている。また、
固化体の圧縮強度は200Kg／cm2程度である。 The specific gravity of the solidified plastic after solidification is 1.28, the weight ratio of the granulated powder is 0.52, and the original waste powder is 0.47.
It is spread throughout the solidified body at a density of g/cm 3 . Also,
The compressive strength of the solidified material is approximately 200Kg/cm 2 .
なお、本発明は上記実施例に限定されない。例
えば造粒処理時のバインダは、固化剤の一成分と
なり得る難燃性プラスチツクとしてもよい。 Note that the present invention is not limited to the above embodiments. For example, the binder during the granulation process may be a flame-retardant plastic that can be a component of the solidifying agent.
第１図は本発明処理法を実施する装置の一例を
示す模式図、第２図は造粒前の粉体、造粒後の粒
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……加振機。
FIG. 1 is a schematic diagram showing an example of an apparatus for carrying out the treatment method of the present invention, and FIG. 2 is a diagram showing the particle size distribution of the powder before granulation and the granule after granulation. 2... Rigid thin film dryer, 5... Stirring granulator, 7
...Drum, 9...Vibrator.
Claims (1)
の工程により得られた粉体を撹拌造粒する工程
と、ドラム缶中でプラスチツク固化剤と適宜添加
剤を振動により均一に混合する工程と、前記ドラ
ム缶に振動を加え乍ら前記の造粒工程で得られた
粒体をドラム缶中に投入す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 step of drying and pulverizing radioactive waste, a step of stirring and granulating the powder obtained in this step, a step of uniformly mixing a plastic solidifying agent and appropriate additives in a drum by vibration, A method for solidifying radioactive waste into an in-drum plastic, comprising the step of applying vibration to the drum and charging the granules obtained in the granulation step into the drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17078679A JPS5693092A (en) | 1979-12-27 | 1979-12-27 | Radioactive waste indrum plastic solidification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17078679A JPS5693092A (en) | 1979-12-27 | 1979-12-27 | Radioactive waste indrum plastic solidification method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5693092A JPS5693092A (en) | 1981-07-28 |
| JPS6158798B2 true JPS6158798B2 (en) | 1986-12-13 |
Family
ID=15911336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17078679A Granted JPS5693092A (en) | 1979-12-27 | 1979-12-27 | Radioactive waste indrum plastic solidification method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5693092A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01140098U (en) * | 1988-02-26 | 1989-09-25 |
-
1979
- 1979-12-27 JP JP17078679A patent/JPS5693092A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01140098U (en) * | 1988-02-26 | 1989-09-25 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5693092A (en) | 1981-07-28 |
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