JPH0566559B2 - - Google Patents
Info
- Publication number
- JPH0566559B2 JPH0566559B2 JP60073210A JP7321085A JPH0566559B2 JP H0566559 B2 JPH0566559 B2 JP H0566559B2 JP 60073210 A JP60073210 A JP 60073210A JP 7321085 A JP7321085 A JP 7321085A JP H0566559 B2 JPH0566559 B2 JP H0566559B2
- Authority
- JP
- Japan
- Prior art keywords
- polyvinyl butyral
- sheets
- radioactive materials
- contaminated
- sheet
- 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 - Lifetime
Links
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims description 21
- 239000012857 radioactive material Substances 0.000 claims description 17
- 238000011109 contamination Methods 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N Butyraldehyde Chemical compound CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- 239000002341 toxic gas Substances 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 239000000941 radioactive substance Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- HGBOYTHUEUWSSQ-UHFFFAOYSA-N valeric aldehyde Natural products CCCCC=O HGBOYTHUEUWSSQ-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- 239000002901 radioactive waste Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は原子力発電所等の放射性物質取扱施設
内の汚染防止法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for preventing contamination in facilities handling radioactive materials such as nuclear power plants.
（従来の技術）
原子力発電所のような放射性物質または放射性
物質により汚染された機器類を取扱う施設におい
ては、作業場の床面にポリエチレン、ポリプロピ
レン、エチレン−酢酸ビニル共重合体、ポリ塩化
ビニル等のシートを敷詰め、これらのシートが汚
染されたときには焼却処理する汚染防止法が採用
されている（例えば、特公昭53−36116号公報）。(Prior art) In facilities such as nuclear power plants that handle radioactive materials or equipment contaminated with radioactive materials, materials such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polyvinyl chloride, etc. are used on the workplace floor. A pollution prevention method has been adopted in which sheets are laid down and if these sheets become contaminated, they are incinerated (for example, Japanese Patent Publication No. 36116/1983).
ところが、ポリエチレン、ポリプロピレン、エ
チレン−酢酸ビニル共重合体はいずれも焼却時の
発熱量が約10000Kcal／Kg以上であつて石油と大
差ない程度に大きく、焼却炉に大きい負荷を与え
焼却炉の損耗が著しく処理重量が小さい欠点があ
つた。 However, polyethylene, polypropylene, and ethylene-vinyl acetate copolymers all have a calorific value of approximately 10,000 Kcal/Kg or more when incinerated, which is about the same as petroleum, placing a large load on the incinerator and causing wear and tear on the incinerator. The drawback was that the processing weight was extremely small.
また、ポリ塩化ビニルは発熱量が約
5000Kcal／Kgであるが、焼却の際に腐蝕性かつ
有毒性のガスを発生するため焼却処理を行うこと
ができない欠点があつた。 In addition, polyvinyl chloride has a calorific value of approximately
5000Kcal/Kg, but it had the disadvantage that it could not be incinerated because corrosive and toxic gases were generated during incineration.
更にまた、エチレン−酢酸ビニル共重合体のシ
ートは高価であるうえ、粘着性が強いので床面に
敷いた場合には作業者の歩行を妨げる欠点もあつ
た。 Furthermore, sheets of ethylene-vinyl acetate copolymer are expensive and have strong adhesiveness, so that when spread on the floor, they impede the walking of workers.
（発明が解決しようとする問題点）
本発明は上記のような従来の問題点を解決し
て、放射性物質を確実に捕集することができるう
え焼却処理上の問題がなく、しかも費用が安く作
業者の歩行を妨げることもない放射性物質取扱施
設内の汚染防止法を目的として完成されたもので
ある。(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, can reliably collect radioactive materials, has no problems with incineration, and is inexpensive. It was completed with the aim of preventing contamination in facilities handling radioactive materials without interfering with workers' walking.
（問題点を解決するための手段）
本発明は放射性物質取扱施設内にブチラール化
度62〜68モル％、厚さ0.03〜0.2mmのポリビニル
ブチラールシートを敷詰め、このポリビニルブチ
ラールシート上で放射性物質を取扱い、このポリ
ビニルブチラールシートが汚染されたときには敷
替えを行い、汚染されたポリビニルブチラールシ
ートを焼却処理することを特徴とするものであ
る。(Means for Solving the Problems) The present invention spreads polyvinyl butyral sheets with a degree of butyralization of 62 to 68 mol% and a thickness of 0.03 to 0.2 mm in a radioactive material handling facility, and radioactive materials are spread on the polyvinyl butyral sheets. When the polyvinyl butyral sheet becomes contaminated, the polyvinyl butyral sheet is replaced, and the contaminated polyvinyl butyral sheet is incinerated.
本発明において用いられるポリビニルブチラー
ルシートはポリビニルアルコールとブチルアルデ
ヒドを原料としてカレンダー法によつて安価に製
膜されるものであり、その性状はブチラール化度
によつて変化するが本発明においてはブチラール
化度62〜68モル％のものが用いられる。ブチラー
ル化度が62モル％未満では耐水性及び耐熱性に劣
り、厚さが0.03mm未満では破れ易く放射性廃棄物
を完全に捕集することができなくなり、逆にブチ
ラール化度が68％を越えると強度が劣化してやは
り破れ易くなり、更に厚さが0.2mmを越えると経
済的ではなくなる。 The polyvinyl butyral sheet used in the present invention is produced inexpensively by a calendar method using polyvinyl alcohol and butyraldehyde as raw materials, and its properties vary depending on the degree of butyralization. A content of 62 to 68 mol% is used. If the degree of butyralization is less than 62 mol%, water resistance and heat resistance will be poor; if the thickness is less than 0.03 mm, it will break easily and radioactive waste will not be completely collected; on the other hand, if the degree of butyralization exceeds 68% If the thickness exceeds 0.2 mm, it will become uneconomical.
ブチラール化度が例えば65モル％のポリビニル
ブチラールシートは、引張強度が600Kg／cm2以上
であつて低密度ポリエチレンシートの引張強度が
80〜160Kg／cm2であるのと比較してはるかに大き
く、伸び15〜60％（低密度ポリエチレンシートで
は90〜800％）、連続耐熱温度200℃以上（低密度
ポリエチレンシートでは100〜118℃）であつて床
面に敷かれるシート材料としてはポリエチレンシ
ートと同等以上の優れた特性を有している。 For example, a polyvinyl butyral sheet with a degree of butyralization of 65 mol% has a tensile strength of 600 Kg/cm 2 or more, and the tensile strength of a low-density polyethylene sheet is
80-160Kg/ cm2 , elongation 15-60% (90-800% for low-density polyethylene sheets), continuous heat resistance temperature of 200℃ or more (100-118℃ for low-density polyethylene sheets) ), and as a sheet material spread on the floor, it has excellent properties equivalent to or better than polyethylene sheets.
またその発熱量は約6500Kcal／Kgであつてポ
リエチレンシートの発熱量が11000Kcal／Kgであ
るのと比較して約１／1.7以下であるため処理重
量が約1.7倍以上となり燃焼性も良好で腐蝕性お
よび有毒性のガスの発生もない。 In addition, its calorific value is approximately 6,500 Kcal/Kg, which is approximately 1/1.7 or less compared to the calorific value of polyethylene sheet, which is 11,000 Kcal/Kg, so the processing weight is approximately 1.7 times or more, and its combustibility is good and corrosion-resistant. There is no generation of toxic or toxic gases.
更に、ポリビニルブチラールシートには作業者
の歩行を妨げるような粘着性がないうえ放射性物
質を透過させることもなく、厚さが0.03〜0.2mm
程度のポリビニルブチラールシートを作業場の床
に敷詰め、その上で放射性物質を取扱つた場合も
床面の汚染を完全に防止することができる。 Furthermore, polyvinyl butyral sheets do not have adhesive properties that would hinder workers' walking, are not transparent to radioactive substances, and have a thickness of 0.03 to 0.2 mm.
Even if radioactive materials are handled on the floor of a workplace by covering the floor with polyvinyl butyral sheets of about 100%, contamination of the floor surface can be completely prevented.
なお、ポリビニルブチラールシートの表面に滑
り止め加工を施しておけば作業性を更に向上させ
ることができる。 Note that workability can be further improved if the surface of the polyvinyl butyral sheet is treated with an anti-slip finish.
このようにブチラール化度が62〜68モル％のポ
リビニルブチラールシートは放射性物質による床
面の汚染を完全に防止することができるうえ、発
熱量が小さいので汚染されたときには敷替えを行
つたうえで容易に焼却することができ、このとき
に焼却炉に過大な負荷を与えて焼却炉の損耗を早
めることも少ない。 In this way, polyvinyl butyral sheets with a degree of butyralization of 62 to 68 mol% can completely prevent floor surface contamination by radioactive materials, and their calorific value is small, so if contaminated, they can be replaced and replaced. It can be easily incinerated, and at this time, it is less likely that an excessive load will be applied to the incinerator, causing accelerated wear and tear on the incinerator.
なお、焼却灰は安全な無機物であるから、ドラ
ム缶等に詰めて安全に保管することができる。 Incidentally, since incineration ash is a safe inorganic substance, it can be safely stored in drums or the like.
（実施例） 次に本発明の好ましい実施例を示す。(Example) Next, preferred embodiments of the present invention will be shown.
ポリビニルアルコールとブチルアルデヒドとの
縮合によつて得られたブチラール化度65モル％の
ポリビニルブチラールよりカレンダー法により製
膜された厚さ0.1mm、幅1800mmの市販のポリビニ
ルブチラールシートを入手した。 A commercially available polyvinyl butyral sheet with a thickness of 0.1 mm and a width of 1800 mm was obtained by a calendaring method from polyvinyl butyral having a degree of butyralization of 65 mol % obtained by condensation of polyvinyl alcohol and butyraldehyde.
このポリビニルブチラールシートを原子力発電
所の床面に敷詰め、その上で放射性物質を取扱
い、その結果汚染せれたシートを新しいシートに
敷替えるとともに汚染されたシートを焼却発熱量
35万Kcal／Hrの焼却炉により焼却処理した。 This polyvinyl butyral sheet is spread on the floor of a nuclear power plant, radioactive materials are handled on it, and as a result, the contaminated sheet is replaced with a new sheet, and the contaminated sheet is incinerated to generate heat.
It was incinerated in a 350,000 Kcal/Hr incinerator.
従来のポリエチレンシートの場合には最大処理
容量は30Kg／Hrであつたが、ポリビニルブチラ
ールシートは55Kg／Hrの焼却が可能であり、腐
蝕性および有毒性ガスを発生することもなく燃焼
状態は極めて良好であつた。 In the case of conventional polyethylene sheets, the maximum processing capacity was 30Kg/Hr, but polyvinyl butyral sheets can be incinerated at 55Kg/Hr, and the combustion conditions are extremely low without generating corrosive or toxic gases. It was good and warm.
また、ポリビニルブチラールシートは従来のエ
チレン−酢酸ビニル共重合体シートのように作業
者の歩行を妨げる粘着性をしめさないので作業性
が良く、作業場の床が放射性物質により汚染され
ることを完全に防止することができた。 In addition, unlike conventional ethylene-vinyl acetate copolymer sheets, polyvinyl butyral sheets do not exhibit stickiness that prevents workers from walking, making them easy to work with and completely preventing workplace floors from being contaminated with radioactive materials. could be prevented.
また、汚染されたシートは新しいシートと敷替
えるので、放射性物質が蓄積されることはなく、
作業環境は常に安全に保たれた。 In addition, contaminated sheets are replaced with new sheets, so radioactive materials do not accumulate.
The work environment was kept safe at all times.
（発明の効果）
本発明は以上の説明からも明らかなように、放
射性物質を確実に捕集することができしかも発熱
量の低いブチラール化度62〜68モル％のポリビニ
ルブチラールシートを使用したものであるから、
原子力発電所のような放射性物質取扱施設の床面
の汚染を防止できることは勿論、汚染されたシー
トの焼却処理に際しても焼却炉の損耗が少なく、
しかも大量に焼却処理でき、また焼却灰は安定し
た無機物として処理し易く、しかも作業性を損な
うことがないうえ費用が安価である等の多くの利
点を有するものである。(Effects of the Invention) As is clear from the above description, the present invention uses a polyvinyl butyral sheet with a degree of butyralization of 62 to 68 mol% that can reliably collect radioactive substances and has a low calorific value. Because it is,
Not only can it prevent contamination of the floors of facilities that handle radioactive materials such as nuclear power plants, but it also reduces wear and tear on incinerators when incinerating contaminated sheets.
Moreover, it has many advantages, such as being able to be incinerated in large quantities, the incinerated ash being easily treated as a stable inorganic substance, not impairing workability, and being inexpensive.
よつて本発明は従来のこの種の放射性物質取扱
施設内の汚染防止法の問題点を一掃したものとし
て産業の発展に寄与することは極めて大である。 Therefore, the present invention greatly contributes to the development of industry by eliminating the problems of conventional methods for preventing contamination in facilities handling radioactive materials of this type.
Claims (1)
68モル％、厚さ0.03〜0.2mmのポリビニルブチラ
ールシートを敷詰め、このポリビニルブチラール
シート上で放射性物質を取扱い、このポリビニル
ブチラールシートが汚染されたときには敷き替え
を行い、汚染されたポリビニルブチラールシート
を焼却処理することを特徴とする放射性物質取扱
施設内の汚染防止法。1 Butyralization level 62~ in the facility handling radioactive materials
A 68 mol% polyvinyl butyral sheet with a thickness of 0.03 to 0.2 mm is laid down, radioactive materials are handled on this polyvinyl butyral sheet, and when this polyvinyl butyral sheet becomes contaminated, it is replaced and the contaminated polyvinyl butyral sheet is removed. Contamination prevention law for facilities handling radioactive materials that are characterized by incineration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7321085A JPS61231494A (en) | 1985-04-05 | 1985-04-05 | Method of preventig contamination in radioactive substance treating facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7321085A JPS61231494A (en) | 1985-04-05 | 1985-04-05 | Method of preventig contamination in radioactive substance treating facility |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61231494A JPS61231494A (en) | 1986-10-15 |
| JPH0566559B2 true JPH0566559B2 (en) | 1993-09-22 |
Family
ID=13511565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7321085A Granted JPS61231494A (en) | 1985-04-05 | 1985-04-05 | Method of preventig contamination in radioactive substance treating facility |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61231494A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5336116A (en) * | 1976-09-16 | 1978-04-04 | Fujitsu Ltd | Loop transmission system |
-
1985
- 1985-04-05 JP JP7321085A patent/JPS61231494A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5336116A (en) * | 1976-09-16 | 1978-04-04 | Fujitsu Ltd | Loop transmission system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61231494A (en) | 1986-10-15 |
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