JPS622200A - Vessel for storing radioactive waste and method of coating said vessel - Google Patents

Vessel for storing radioactive waste and method of coating said vessel

Info

Publication number
JPS622200A
JPS622200A JP14134085A JP14134085A JPS622200A JP S622200 A JPS622200 A JP S622200A JP 14134085 A JP14134085 A JP 14134085A JP 14134085 A JP14134085 A JP 14134085A JP S622200 A JPS622200 A JP S622200A
Authority
JP
Japan
Prior art keywords
container
component
paint
radioactive waste
coating
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.)
Granted
Application number
JP14134085A
Other languages
Japanese (ja)
Other versions
JPH0518078B2 (en
Inventor
憲一 中川
右田 利實
大城 雄一
大東 章司
曜 山崎
忠彦 西島
三原 紘
湯浅 高弘
充 河野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dai Nippon Toryo KK
Original Assignee
Dai Nippon Toryo KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dai Nippon Toryo KK filed Critical Dai Nippon Toryo KK
Priority to JP14134085A priority Critical patent/JPS622200A/en
Publication of JPS622200A publication Critical patent/JPS622200A/en
Publication of JPH0518078B2 publication Critical patent/JPH0518078B2/ja
Granted legal-status Critical Current

Links

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】 〈産業上の利用分野〉 本発明は放射性廃棄物を収納した鉄製容器を長期間にわ
たって保存する際に、あるいは廃棄処分した際に容器の
安全性を確保するために長期防食被覆層を施した放射性
廃棄物貯蔵用容器及び該容器の塗装方法に関するもので
ある。
[Detailed Description of the Invention] <Industrial Application Field> The present invention provides long-term use to ensure the safety of iron containers containing radioactive waste when they are stored for long periods of time or when they are disposed of. The present invention relates to a container for storing radioactive waste provided with an anti-corrosion coating layer and a method for coating the container.

〈従来の技術〉 原子力発電所等より発生した放射性廃棄物は、人間の生
活環境から安全に隔離するため、これら廃棄物はコンク
リート、アスファルト、プラスチック等で固化し、ドラ
ム缶等の鉄製容器に収納され、原子力発電所内の貯蔵庫
等に保管されている。
<Conventional technology> In order to safely isolate radioactive waste generated from nuclear power plants, etc. from the human living environment, these wastes are solidified with concrete, asphalt, plastic, etc., and stored in iron containers such as drums. , stored in storage warehouses within nuclear power plants.

ところで放射性廃棄物貯蔵用容器(以下単に容器と略称
する)は、前述の通り人体への影響や環境汚染を防止す
る必要上、長期間にわたって外部環境と遮断されている
ことが重要であり、それ故゛容器は保管される環境下で
長期間腐食から保護されなくてはならない。
By the way, as mentioned above, it is important for radioactive waste storage containers (hereinafter simply referred to as containers) to be isolated from the outside environment for a long period of time in order to prevent effects on the human body and environmental pollution. Old containers must be protected from corrosion over long periods of time in the environment in which they are stored.

そこで従来容器はアクリルメラミン樹脂系塗料、アルキ
ドメラミン樹脂系塗料、クールエポキシ樹脂系塗料等の
塗装により保護されていた。
Conventionally, containers have been protected by coatings such as acrylic melamine resin paints, alkyd melamine resin paints, and cool epoxy resin paints.

〈発明が解決しようとする問題点〉 ところが従来の前記塗料は、焼付タイプの場合、放射性
廃棄物を収納する前の容器にのみ適用出来、放射性廃棄
物を収納した後の容器には塗膜の焼付工程が必要なため
適用出来ず、補修塗りも困難であった。また自然乾燥タ
イプの場合、完全なケレン処理が必要であり、また乾燥
時間も長いため、効率よく塗装することは出来なかった
。さらに致命的なことには、放射性廃棄物を収納した容
器は重量が通常200〜500 kgと重いため運搬等
の取扱い時に鉄素地に達する傷が付きゃすく、長期保管
の必要上防食面で問題があった。事実、塗装後数年間保
管されている容器には錆の発生が認められている。
<Problems to be solved by the invention> However, when the conventional paint is a baking type, it can only be applied to containers before storing radioactive waste, and the paint film cannot be applied to containers after storing radioactive waste. It cannot be applied because it requires a baking process, and repair painting is also difficult. Furthermore, in the case of the natural drying type, a complete scouring process is required and the drying time is also long, making it impossible to paint efficiently. Even more fatally, containers containing radioactive waste are usually heavy, weighing between 200 and 500 kg, so they are susceptible to scratches that reach the iron base during transportation and other handling, and the need for long-term storage poses problems in terms of corrosion protection. there were. In fact, rust has been observed in containers that have been stored for several years after being painted.

そこで、放射性廃棄物収納前の新しい容器への塗装だけ
でなく、既に放射性廃棄物が収納され保管されている容
器を、より長期に保管、管理するため、発生した錆を封
じ込み、錆の発生を゛防止するだめの再塗装にも使用可
能な塗料の開発が望まれていた。
Therefore, in addition to painting new containers before storing radioactive waste, in order to store and manage containers that have already contained radioactive waste for a longer period of time, we need to seal in any rust that has occurred, and prevent rust from occurring. There was a desire to develop a paint that could be used for repainting to prevent this.

さらに、このような再塗装をする場合、放射性廃棄物を
収納した容器は相当な重量があり、かつ貯蔵庫内の狭い
スペースで塗装する等の塗装作業条件に成約されるため
、塗料として防食性は勿論のこと、速乾性であること、
1回塗りで厚塗りが可能であること、旧塗膜との付着性
がよいこと、多少の発錆部にも塗装可能であること、取
扱い時に傷から守るためエラスチックで強靭であること
等の塗料、塗膜性能が要求される。また塗装方法につい
ても、相当の重量があり、かつ危険物でもある容器への
塗装であるので、容器の横転、天地逆転等は出来るだけ
避けなければならず、また作業者の被曝防止も考慮に入
れ、かつ狭いスペースでの塗装方法の開発が望まれてい
た。
Furthermore, when performing such repainting, the containers containing radioactive waste are quite heavy, and the painting work conditions must be met, such as painting in a narrow space within the storage facility, so the paint does not have anti-corrosion properties. Of course, it should dry quickly,
It is possible to apply a thick coat with one coat, has good adhesion to the old paint film, can be applied to areas with some rust, and is elastic and strong to protect it from scratches during handling. Paint and coating performance are required. Regarding the painting method, since the painting is done on containers that are quite heavy and dangerous, it is necessary to avoid overturning the container or turning it upside down as much as possible, and also take into consideration the prevention of worker exposure to radiation. There was a desire to develop a coating method that could be used in small spaces.

本発明者らはこのような現状に鑑み鋭意検討した結果、
前記問題点を解決した塗料及び塗装方法を開発し、本発
明に到達した。
As a result of intensive study in view of the current situation, the inventors of the present invention found that
We have developed a paint and a coating method that solve the above problems, and have arrived at the present invention.

く問題点を解決するための手段〉 すなわち本発明は (1)  ひまし油系ポリオールとその他ポリオールか
らなるポリオール成分、硬化促進剤、平滑性助    
□剤及び顔料からなる主剤成分(A)とポリインシアネ
ート硬化剤成分子Blとからなる速乾性無溶剤型ウレタ
ン樹脂塗料を塗装し、硬度(ショアD)40〜85、塗
膜伸び率40%以上の防食被覆層を施した放射性廃棄物
貯蔵用容器、及び(2)  オーバースプレー塗料ミス
トを捕集する排気手段を有する塗装ブース内に放射性廃
棄物貯蔵用容器をコンベアにて搬送し、前記容器を吊り
上げ自転させながら、容器の底部及び側壁下端部に、ひ
まし油系ポリオールとその他ポリオールからなるポリオ
ール成分、硬化促進剤、平滑性助剤及び顔料からなる主
剤成分(A)とポリイソシアネート硬化剤成分旧)とか
らなる速乾性無溶剤型ウレタン樹脂塗料を2液混合エア
レススプレーにて塗装する工程、次いで前記容器をター
ンテーブル上に乗せ、回転させながら容器の側壁部及び
天蓋邪に前記塗料を2液混合エアレススプレーにて塗装
する工程とからなる放射性廃棄物貯蔵用容器の塗装方法
に関するものである。
Means for Solving the Problems〉 That is, the present invention provides (1) a polyol component consisting of a castor oil polyol and other polyols, a curing accelerator, and a smoothness aid.
□A fast-drying solvent-free urethane resin paint consisting of a main component (A) consisting of an agent and a pigment and a polyincyanate curing agent component Bl is applied, and the hardness (Shore D) is 40 to 85 and the coating film elongation rate is 40% or more. (2) A radioactive waste storage container is conveyed by a conveyor into a painting booth having an exhaust means for collecting overspray paint mist, and the container is While lifting and rotating the container, a polyol component consisting of a castor oil-based polyol and other polyols, a main component (A) consisting of a curing accelerator, a smoothing aid, and a pigment, and a polyisocyanate curing agent component (formerly) are added to the bottom of the container and the lower end of the side wall. A step of applying a quick-drying solvent-free urethane resin paint consisting of a two-component mixed airless sprayer, then placing the container on a turntable and mixing the two-component paint on the side walls and canopy of the container while rotating. The present invention relates to a method of painting a radioactive waste storage container, which comprises a step of painting with an airless spray.

く具体的説明〉 本発明において使用される塗料は、ひまし油系ポリオー
ルとその他ポリオールからなるポリオール成分、硬化促
進剤、平滑性助剤及び顔料からなる主剤成分(A)とポ
リイソシアネート硬化剤成分(Blとからなる速乾性無
溶剤型ウレタン樹脂塗料であり、得られた塗膜が、硬度
(ショアD)40〜85、塗膜伸び率40%以上のもの
である。
Specific Description> The paint used in the present invention comprises a polyol component consisting of a castor oil-based polyol and other polyols, a main component (A) consisting of a curing accelerator, a smoothing aid, and a pigment, and a polyisocyanate curing agent component (Bl). It is a quick-drying solvent-free urethane resin paint consisting of the following, and the resulting paint film has a hardness (Shore D) of 40 to 85 and a paint film elongation rate of 40% or more.

本発明において、ひまし油系ポリオールはトウゴマの種
子から圧搾法によって得られる不乾性油であってリシノ
ール酸のグリセライドを主成分とするものであり、通常
1分子中に、約2.5個の水酸基を有し、粘度約6〜9
ストークスポイズ(20℃において)である。なお、ヒ
マシ油系ポリオールとして多価アルコールで変性した変
性ひまし油も使用出来る。
In the present invention, the castor oil-based polyol is a non-drying oil obtained from castor seeds by pressing, and is mainly composed of glyceride of ricinoleic acid, and usually contains about 2.5 hydroxyl groups in one molecule. and has a viscosity of about 6 to 9
Stokes poison (at 20°C). Note that modified castor oil modified with a polyhydric alcohol can also be used as the castor oil-based polyol.

ひまし油系ポリオールは、塗料に流動性を付与し、塗装
作業性をよくし、また顔料との混和性を向上させる効果
を有する。ひまし油系ポリオールの配合割合は顔料を除
く主剤成分囚中約20〜80重量%が適当である。
Castor oil-based polyols have the effect of imparting fluidity to paints, improving coating workability, and improving miscibility with pigments. The appropriate blending ratio of the castor oil polyol is about 20 to 80% by weight based on the base ingredients excluding pigments.

本発明において、ひまし油系ポリオール以外のポリオー
ル成分は、ひまし油系ポリオール単独の場合得られる塗
膜に粘着性が残るのでこのような塗膜の粘着性をなくす
ために使用するものである。
In the present invention, the polyol components other than the castor oil polyol are used to eliminate the tackiness of the coating film obtained when the castor oil polyol is used alone.

上記ポリオール成分としては、モノエタノールアミン、
ジェタノールアミン、エチレンジアミン、トルイレンジ
アミン等のアミン類とエチレンオキサイド、プロピレン
オキサイド等のアルキレンオキサイドとを付加反応させ
た、水酸基価300〜1000、数平均分子量600以
下のアミン系ポリオール;エチレングリコール、プロピ
レングリコール、グリセリン等の多価アルコールとアル
キレンオキサイドとを付加反応させたポリエーテルポリ
オール;ポリブタジェンポリオール;アクリルポリオー
ル等が挙げられる。
The above polyol components include monoethanolamine,
Amine-based polyol with a hydroxyl value of 300 to 1,000 and a number average molecular weight of 600 or less, which is an addition reaction between amines such as jetanolamine, ethylenediamine, and toluylene diamine and alkylene oxides such as ethylene oxide and propylene oxide; ethylene glycol, propylene Examples include polyether polyols obtained by addition-reacting polyhydric alcohols such as glycol and glycerin with alkylene oxide; polybutadiene polyols; acrylic polyols.

該ポリオール成分の使用量はひまし油系ポリオール10
0重量部に対し15〜150重量部程度が適当で過剰に
なると塗料の流動性等が低下し塗装作業性が悪くなる。
The amount of the polyol component used is 10% of the castor oil-based polyol.
Approximately 15 to 150 parts by weight relative to 0 parts by weight is appropriate; if it is in excess, the fluidity of the coating material will decrease and the coating workability will deteriorate.

本発明において硬化促進剤は、トリエチレンジアミン、
ジエチレントリアミン、トリエチレンテトラミン、テト
ラエチレンペンタミン、ジアミノジフェニルメタン、ジ
アミノジクロロジフェニルメタン、キシレンジアミン等
のポリアミン系化合物が挙げられる。これら硬化促進剤
は、乾煙時間を短縮するだけでなく、厚塗り塗装に適し
た塗料粘性を付与し、架橋密度の増加による塗膜の物理
的強度の向上に寄与する。硬化促進剤の配合割合は顔料
を除く主剤成分図中、約0.1〜lO重量%が適当であ
る。
In the present invention, the curing accelerator is triethylenediamine,
Examples include polyamine compounds such as diethylenetriamine, triethylenetetramine, tetraethylenepentamine, diaminodiphenylmethane, diaminodichlorodiphenylmethane, and xylene diamine. These curing accelerators not only shorten the dry smoke time, but also provide paint viscosity suitable for thick coating, and contribute to improving the physical strength of the paint film by increasing the crosslink density. The blending ratio of the curing accelerator is suitably about 0.1 to 10% by weight in the main ingredient component diagram excluding pigments.

本発明において平滑性助剤は、水分を吸着したり、水と
反応する機能を有し、ピンホールのない、平滑で均一な
塗膜を得るために配合されるものであり、具体的にはゼ
オライト、焼セッコウ、シリカゲル、生石灰等が挙げら
れ、これらの粒径は100μ以下のものが好ましい。平
滑性助剤の配合割合は顔料を除く主剤成分図中、約1〜
30重蛍%が適当である。
In the present invention, the smoothing agent has the function of adsorbing water or reacting with water, and is blended to obtain a smooth and uniform coating film without pinholes. Examples include zeolite, calcined gypsum, silica gel, quicklime, etc., and the particle size of these is preferably 100 μm or less. The blending ratio of the smoothing aid is approximately 1 to 1 in the main ingredient component diagram excluding pigments.
30% double fluorescence is appropriate.

本発明において顔料は、通常塗料に使用されている各睡
着色顔料、防食顔料体質顔料が使用される。顔料の使用
量は、顔料を除く主剤成分囚100重量部に対し50〜
200重量部が適当である。
In the present invention, the pigments used are various coloring pigments, anticorrosive pigments, and extender pigments that are commonly used in paints. The amount of pigment used is 50 to 100 parts by weight of the main ingredient excluding pigment.
200 parts by weight is suitable.

本発明において主剤成分は以上の成分からなるが、必要
に応じキシレン樹脂、液状歴青物質、可塑剤、繊維性物
質等の改質剤あるいは有機金属化合物、紫外線吸収剤、
酸化防止剤等の添加剤を配合することも可能である。特
にキシレン樹脂は本発明で使用するウレタン樹脂塗料の
各成分間の相溶性を向上させ、その結果得られる塗膜を
鮮映性あるものにすると同時に適度の伸びを付与すると
いう効果を有するので好適に使用される。なお、キシレ
ン樹脂は数平均分子量が300〜1500、メチロール
基含有量が0.3〜5重量%のものが適当で、その配合
割合は顔料を除く主剤成分図中、約30重量%以下が適
当である。
In the present invention, the main component consists of the above components, but if necessary, modifiers such as xylene resin, liquid bituminous substances, plasticizers, fibrous substances, organometallic compounds, ultraviolet absorbers, etc.
It is also possible to incorporate additives such as antioxidants. In particular, xylene resin is preferred because it has the effect of improving the compatibility between each component of the urethane resin paint used in the present invention, making the resulting paint film sharp, and at the same time imparting appropriate elongation. used for. In addition, it is appropriate for the xylene resin to have a number average molecular weight of 300 to 1,500 and a methylol group content of 0.3 to 5% by weight, and the appropriate blending ratio is about 30% by weight or less in the main ingredient component diagram excluding pigments. It is.

本発明において硬化剤成分(B)としてポリイソシアネ
ートを使用する。ポリイソシアネートとしてはトルイレ
ンジイソシアネー)(TDI)、ジフェニルメタンジイ
ソシアネート(MDI)、ポリフェニルメタンポリイソ
シアネート(クルードMDI)、変性ジフェニルメタン
ポリイソシアネート(変性MDI)、キシレンジイソシ
アネート(XDI)、ヘキサメチレンジイソシアネート
(HMDI)あるいはこれらポリイソシアネートの三量
体化合物、これらポリイソシアネートとポリオールの反
応生成物等が代表的なものとして挙げられる。ポリイソ
シアネートは前記主剤成分(A)と使用(塗装)直前に
混合して塗料化する。その配合割合は硬化剤成分のイン
シアネート基対主剤成分ノ水酸基の当量比(NGOlo
H) が(0,9〜1、6 / 1. O)となる範囲
が好ましい。
In the present invention, polyisocyanate is used as the curing agent component (B). Examples of polyisocyanates include toluylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), polyphenylmethane polyisocyanate (crude MDI), modified diphenylmethane polyisocyanate (modified MDI), xylene diisocyanate (XDI), and hexamethylene diisocyanate (HMDI). Typical examples include trimer compounds of these polyisocyanates and reaction products of these polyisocyanates and polyols. The polyisocyanate is mixed with the base component (A) immediately before use (painting) to form a paint. The compounding ratio is the equivalent ratio of the incyanate group of the curing agent component to the hydroxyl group of the main component (NGOlo
H) is preferably in the range of (0.9 to 1.6/1.O).

本発明で使用するウレタン樹脂塗料は、無溶剤型であり
、2液混合エアレススプレーにて塗装可能であり、1回
塗りで0.1〜3 s程度の厚塗りが出来る。また乾燥
時間(塗膜表面を指で強く押しても跡が残らなくなるま
での時間)も数十分てあり、速乾性である。
The urethane resin paint used in the present invention is solvent-free and can be applied using a two-component airless sprayer, allowing for a thick coating of about 0.1 to 3 seconds in one coat. It also has a drying time of several tens of minutes (the time it takes for no marks to remain even if you press the surface of the coating strongly with your finger), and it dries quickly.

本発明の放射性廃棄物貯蔵用容器は、その表面に、前記
速乾性無溶剤型ウレタン樹脂塗料を塗装し、硬度(ショ
アD)40〜85、塗膜伸び率(次式で定義される)4
0%以上の防食被覆層を施したものである。
The radioactive waste storage container of the present invention has its surface coated with the quick-drying solvent-free urethane resin paint, has a hardness (Shore D) of 40 to 85, and a coating film elongation rate (defined by the following formula) of 4.
A corrosion-resistant coating layer of 0% or more is applied.

注「切断時の塗膜の長さ」とは引張試験機にて塗膜を1
0 +nm/min  (20℃)の速度で引張り、塗
膜が切れな時の塗膜の長さをいう。
Note: “Length of the coating film when cut” refers to the length of the coating film measured with a tensile tester.
It refers to the length of the coating film when it is pulled at a speed of 0 + nm/min (20°C) and does not break.

防食被覆層は前−記の通り硬度(ショアD)40〜85
が適当で、硬度が低iぎると運搬等の取扱い時、傷が付
きやすくなり、逆に高過ぎるとクラックが発生しやすく
なり、その結果、その個所より錆が発生しやすくなる。
As mentioned above, the anticorrosion coating layer has a hardness (Shore D) of 40 to 85.
If the hardness is too low, it will be easily scratched during handling such as transportation, whereas if it is too high, cracks will easily occur, and as a result, rust will occur more easily in those areas.

また塗膜伸び率は40%以上が適当であり、伸び率が低
いと容器が機械的ダメージを受けた時、その衝撃に追従
出来ず、また温度変化等による容器と塗膜の伸縮差に塗
膜が追従出来ない等の原因により密着力を低下させ、そ
の結果請が発生しやすくなる。また防食被覆層は、長期
防食の観点から膜厚は約0.3〜4關程度が望ましい。
In addition, a coating film elongation rate of 40% or more is appropriate; if the elongation rate is low, when the container receives mechanical damage, it will not be able to follow the impact, and the coating will not be able to respond to the difference in expansion and contraction between the container and the coating film due to temperature changes, etc. The adhesion force is reduced due to factors such as the film's inability to follow the pattern, and as a result, wrinkles are more likely to occur. Further, the thickness of the anticorrosion coating layer is preferably about 0.3 to 4 mm from the viewpoint of long-term corrosion protection.

次に本発明の放射性廃棄物貯蔵用容器の塗装方法の一実
施例につき図面を参照しながら説明する。
Next, an embodiment of the method for coating a radioactive waste storage container according to the present invention will be described with reference to the drawings.

第1図は本発明の容器の塗装施工フローチャートである
FIG. 1 is a flowchart for painting a container according to the present invention.

容器は、放射線管理区域内の貯蔵庫から、パレットに積
載した状態で、コンテナ車にて搬出し、塗装ゾーンに搬
入し、塵等の付着物を除去した後、パレットごと容器、
パレット搬送装置により、ローラーコンベア上に一本づ
つ積み上げる。
Containers are loaded onto pallets from storage in the radiation controlled area and transported by container truck, transported to the painting zone, and after removing dust and other deposits, the containers and pallets are removed.
The pallets are stacked one by one onto a roller conveyor using a pallet transport device.

次いで容器はローラーコンベアで塗装ブース内に搬送す
る。なお、塗装ブースの壁面には第2図に示す如き、オ
ーバースプレー塗料ミストを捕集するノーポンプ排気手
段を設置している。塗装ブース内に浸入された容器1は
所定の場所で停止し、第3図に示す如く容器吊り攪送装
置2にて垂直に吊り上げられ、自転させながら、自動も
しくは手動の2液混合エアレススプレー塗装機3で容器
1の底部及び側壁下端部を塗装する。
The container is then transported into the coating booth by a roller conveyor. Additionally, a no-pump exhaust means is installed on the wall of the painting booth to collect overspray paint mist, as shown in Figure 2. The container 1 that has entered the coating booth is stopped at a predetermined location, and as shown in Figure 3, it is lifted vertically by the container suspension and agitation device 2, and while it rotates, it is automatically or manually mixed with two liquids and subjected to airless spray painting. Machine 3 paints the bottom and lower end of the side wall of container 1.

次いで容器1を容器吊り搬送装置に吊り上げたまま隣接
する、第4図に示す如き受は台4を載せたターンテーブ
ル5上に搬送し、受は台4上に降す。なお、容器1の底
部は、塗膜が完全に硬化してないので、受は台4には図
面に示す如き、突起部4′を取り付け、受は台4と容器
1との接触面を極力小さくしている。なお前記接触部の
塗膜破損部は当然ながら後で補修塗りする。
Next, while the container 1 is suspended on the container lifting and conveying device, an adjacent receiver as shown in FIG. Since the coating film on the bottom of the container 1 is not completely cured, a protrusion 4' is attached to the base 4 of the receiver as shown in the drawing, and the contact surface between the base 4 and the container 1 is fixed as much as possible. I'm keeping it small. Incidentally, the damaged coating film on the contact area will of course be repaired later.

受は台4に容器1を載せた後、ターンテーブル5を回転
させながら、自動もしくは手動の2液混合エアレススプ
レー塗装機で容器1の側壁部及び天蓋部を塗装する。こ
のようにして容器全面の塗装完了後、プッシャーによっ
て容器はターンテーブル5からローラーコンベア上に押
し出され、数十分間自然乾燥させる。次いで容器にマー
キング用テンプレート装置によりラベルを貼りマーキン
グ処理を施し、塗装工程は完了する。
After placing the container 1 on the stand 4, the receiver coats the side wall and the roof of the container 1 with an automatic or manual two-liquid mixing airless spray coating machine while rotating the turntable 5. After the entire surface of the container is coated in this way, the container is pushed out from the turntable 5 onto a roller conveyor by a pusher and allowed to dry naturally for several minutes. Next, a label is attached to the container using a marking template device and a marking process is applied to the container, completing the painting process.

〈発明の効果〉 本発明により、放射性廃棄物を収納した、相当な重量の
容器を、狭いスペースで塗装可能となり、使用される塗
料は無溶剤であり、かつ速乾性であるので塗装作業性が
よく、塗装スピードが早く、塗装効率がよくまた得られ
た塗膜は、厚膜で、防食性に優れているだけでなく、エ
ラスチックで強靭であるので放射性廃棄物貯蔵用容器を
長期間にわたって安全に保管することが可能である。
<Effects of the Invention> According to the present invention, it is possible to paint a considerable weight container containing radioactive waste in a narrow space, and since the paint used is solvent-free and quick-drying, painting workability is improved. The coating speed is fast, the coating efficiency is high, and the resulting coating film is not only thick and has excellent corrosion resistance, but also is elastic and strong, making it possible to keep radioactive waste storage containers safe for a long time. It is possible to store it in

以下、本発明で使用する塗料、塗膜性能を実施例により
説明する。なお実施例中「部」、「%」は重量基準であ
る。
Hereinafter, the coating material used in the present invention and its coating film performance will be explained with reference to Examples. In the examples, "parts" and "%" are based on weight.

実施例1〜4及び比較例1〜5 化成処理した1、 6 mm厚の鉄板(試験板A)及び
該鉄板に市販のアルキドメラミン樹脂系塗料〔「プリコ
ン#300J  (大日本塗料社製商品名)〕を乾産膜
厚30μになるように塗布、焼付し、半年間室内にて放
置した塗装板(試験板B)に第1表に示す配合の塗料を
乾燥膜要約0.5 mtnになるよう2液浸合エアレス
スプレーにて塗装し、室温(20℃)で乾燥させた。な
お、表中の塗料は主剤成分を十分攪拌混合し、次いでサ
ンドミルで練合した後、1日間密閉下に放置したもので
ある。
Examples 1 to 4 and Comparative Examples 1 to 5 A chemical conversion treated iron plate of 1.6 mm thickness (test plate A) and a commercially available alkyd melamine resin paint [“Pricon #300J (trade name, manufactured by Dainippon Toyo Co., Ltd.)” were applied to the iron plate. )] was applied and baked to a dry film thickness of 30μ, and then left indoors for half a year (test board B).A paint with the composition shown in Table 1 was applied to a dry film thickness of 0.5 mtn. It was painted using a two-component airless sprayer and dried at room temperature (20°C).For the paints listed in the table, the main ingredients were sufficiently stirred and mixed, then kneaded in a sand mill, and then kept in a sealed container for one day. It was left alone.

得られた塗膜につき硬化時間、硬度、伸び率、耐衝撃性
、冷・温サイクル性、耐水性、耐塩水性、耐放射線性の
各種試験を行ない、その結果を第1表下段に記載した。
Various tests on curing time, hardness, elongation, impact resistance, cold/warm cycle resistance, water resistance, salt water resistance, and radiation resistance were performed on the resulting coating films, and the results are listed in the lower row of Table 1.

なお比較例4は従来使用されている市販のアルキドメラ
ミン樹脂系塗料を乾燥膜厚30μになるようスプレー塗
装し、150℃、20分間焼付けたものである。また、
比較例5は従来使用されている市販のタールエポキシ樹
脂系塗料を乾燥膜要約0.5 mmになるようスプレー
塗装し、室温で乾燥させたものである。
In Comparative Example 4, a conventionally used commercially available alkyd melamine resin paint was spray-painted to a dry film thickness of 30 μm, and baked at 150° C. for 20 minutes. Also,
In Comparative Example 5, a conventionally used commercially available tar epoxy resin paint was spray-coated to a dry film thickness of 0.5 mm and dried at room temperature.

第1表から明らかの通り本発明の塗膜は、優れた性能を
有していた。一方、°塗膜の伸び率の低に)比較例1及
び硬度の高過ぎる比較例3は耐衝撃性、冷・温サイクル
性が不良であった。また塗膜の硬度の低い比較例2は耐
衝撃性、耐塩水性、耐水性が不良であった。
As is clear from Table 1, the coating film of the present invention had excellent performance. On the other hand, Comparative Example 1 (due to the low elongation rate of the coating film) and Comparative Example 3 (excessively high hardness) had poor impact resistance and cold/hot cycle performance. Comparative Example 2, which had a low coating film hardness, had poor impact resistance, salt water resistance, and water resistance.

注1)実施例1.3及び比較例1〜3 エチレンジアミンのプロピレンオキサイド付加物(数平
均分子量440、水酸基価505) 実施例2.4 グリセリンのプロピレンオキサイド付加物(数平均分子
1400、水酸基価395)注2)実施例1.3及び比
較例1〜3 ジエチレントリアミン 実施例2.4 4.4′−ジアミノジフェニルメタンとトリエチL/ン
ジアミンの(7:3)からなる混合物 注3)実施例2.4 [二カノールLLLj  (三菱瓦斯化学社製商品名;
数平均分子量約400) 注4)ルチル型酸化チタンとシリカ粉末の(1:9)か
らなる混合物 注5)ジブチルフタレート 注6)実施例1.3及び比較例1〜3 「コロネー)2061J  (日本ポリウレタン社製商
品名) 実施例2.4 rPAP1135J  (三菱化成工業社製商品名) 注7)塗膜表面を指で強く押しても跡が残らなくなるま
での時間を測定した。
Note 1) Example 1.3 and Comparative Examples 1 to 3 Propylene oxide adduct of ethylenediamine (number average molecular weight 440, hydroxyl value 505) Example 2.4 Propylene oxide adduct of glycerin (number average molecular weight 1400, hydroxyl value 395) ) Note 2) Example 1.3 and Comparative Examples 1 to 3 Diethylenetriamine Example 2.4 4.Mixture of 4'-diaminodiphenylmethane and triethylene diamine (7:3) Note 3) Example 2.4 [Nicanol LLLj (product name manufactured by Mitsubishi Gas Chemical Co., Ltd.;
Number average molecular weight approximately 400) Note 4) Mixture of rutile titanium oxide and silica powder (1:9) Note 5) Dibutyl phthalate Note 6) Examples 1.3 and Comparative Examples 1 to 3 "Coronet" 2061J (Japan) (Product name manufactured by Polyurethane Co., Ltd.) Example 2.4 rPAP1135J (Product name manufactured by Mitsubishi Chemical Industries, Ltd.) Note 7) The time until no trace remains even when the surface of the coating film is pressed strongly with a finger was measured.

注8)引張試験機(高滓製作所社製商品名「オートグラ
フtM−100」)にて塗膜を l Qn+m/min  (20℃)の速度で引張り、
塗膜が切れた時の塗膜の長さを測定。
Note 8) The coating film was pulled at a speed of 1 Qn + m/min (20°C) using a tensile tester (trade name: “Autograph tM-100” manufactured by Takasugi Seisakusho Co., Ltd.).
Measure the length of the paint film when it breaks.

(なお、実施例3.4及び比較例1〜3はウレタン塗膜
のみ測定) ×100 注9)%インチx1kgX5Qcmの耐衝撃性試験を1
0回繰返す。
(In Example 3.4 and Comparative Examples 1 to 3, only the urethane coating was measured)
Repeat 0 times.

注10)−20℃XIO時間−50℃XIO時間の35
サイクル試験後の塗膜状態 注目)5%食塩水(35℃)にて1000時間塩水噴霧
後の塗膜状態 注12)水道水に3ケ月間浸漬後の塗膜状態性13)C
o−60r線、lX109R照射後の塗膜状態
Note 10) -20℃XIO time -50℃XIO time 35
Note: Coating condition after cycle test) Coating condition after 1,000 hours of salt water spraying in 5% saline (35°C) Note 12) Coating condition after immersion in tap water for 3 months 13) C
Coating film condition after irradiation with o-60r rays and lX109R

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の放射性廃棄物貯蔵用容器の塗装施工フ
ローチャートであり、第2図はオーバースプレー塗料ミ
ストを捕集するノーポンプ排気装置を示し。第3図は前
記容器の底部及び側壁下端部を塗装する外観図であり、
第4図は容器をターンテーブルに載せた時の部分切断図
である。 第3図 第4図
FIG. 1 is a flowchart for painting a radioactive waste storage container according to the present invention, and FIG. 2 shows a no-pump exhaust system for collecting overspray paint mist. FIG. 3 is an external view of painting the bottom and lower end of the side wall of the container;
FIG. 4 is a partially cutaway view of the container placed on the turntable. Figure 3 Figure 4

Claims (2)

【特許請求の範囲】[Claims] (1)ひまし油系ポリオールとその他ポリオールからな
るポリオール成分、硬化促進剤、平滑性助剤及び顔料か
らなる主剤成分(A)とポリイソシアネート硬化剤成分
(B)とからなる速乾性無溶剤型ウレタン樹脂塗料を塗
装し、硬度(ショアD)40〜85、塗膜伸び率40%
以上の防食被覆層を施した放射性廃棄物貯蔵用容器。
(1) Quick-drying solvent-free urethane resin consisting of a polyol component consisting of castor oil polyol and other polyols, a main component (A) consisting of a curing accelerator, a smoothing aid, and a pigment, and a polyisocyanate curing agent component (B) Paint with hardness (Shore D) 40-85, coating film elongation rate 40%
A radioactive waste storage container coated with the above anti-corrosion coating layer.
(2)オーバースプレー塗料ミストを捕集する排気手段
を有する塗装ブース内に放射性廃棄物貯蔵用容器をコン
ベアにて搬送し、前記容器を吊り上げ自転させながら、
容器の底部及び側壁下端部に、ひまし油系ポリオールと
その他ポリオールからなるポリオール成分、硬化促進剤
、平滑性助剤及び顔料からなる主剤成分(A)とポリイ
ソシアネート硬化剤成分(B)とからなる速乾性無溶剤
型ウレタン樹脂塗料を2液混合エアレススプレーにて塗
装する工程、次いで前記容器をターンテーブル上に乗せ
、回転させながら容器の側壁部及び天蓋部に前記塗料を
2液混合エアレススプレーにて塗装する工程とからなる
放射性廃棄物貯蔵用容器の塗装方法。
(2) A container for storing radioactive waste is conveyed by a conveyor into a painting booth having an exhaust means for collecting overspray paint mist, and while the container is lifted and rotated,
At the bottom of the container and at the lower end of the side wall, a fastener consisting of a polyol component consisting of a castor oil-based polyol and other polyols, a main component (A) consisting of a curing accelerator, a smoothing aid, and a pigment, and a polyisocyanate curing agent component (B) is placed. A process of applying a dry solvent-free urethane resin paint using a two-component airless sprayer, then placing the container on a turntable and applying the paint onto the side walls and canopy of the container using a two-component airless sprayer while rotating the container. A method of painting a container for storing radioactive waste, which comprises the steps of painting.
JP14134085A 1985-06-27 1985-06-27 Vessel for storing radioactive waste and method of coating said vessel Granted JPS622200A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14134085A JPS622200A (en) 1985-06-27 1985-06-27 Vessel for storing radioactive waste and method of coating said vessel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14134085A JPS622200A (en) 1985-06-27 1985-06-27 Vessel for storing radioactive waste and method of coating said vessel

Publications (2)

Publication Number Publication Date
JPS622200A true JPS622200A (en) 1987-01-08
JPH0518078B2 JPH0518078B2 (en) 1993-03-10

Family

ID=15289679

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14134085A Granted JPS622200A (en) 1985-06-27 1985-06-27 Vessel for storing radioactive waste and method of coating said vessel

Country Status (1)

Country Link
JP (1) JPS622200A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003036035A (en) * 2001-07-25 2003-02-07 Kyocera Corp Display device
JP2018017647A (en) * 2016-07-29 2018-02-01 国立研究開発法人 海上・港湾・航空技術研究所 Neutron absorber and method for manufacturing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003036035A (en) * 2001-07-25 2003-02-07 Kyocera Corp Display device
JP2018017647A (en) * 2016-07-29 2018-02-01 国立研究開発法人 海上・港湾・航空技術研究所 Neutron absorber and method for manufacturing the same

Also Published As

Publication number Publication date
JPH0518078B2 (en) 1993-03-10

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