JPH04206113A - Radioactive resistant cable - Google Patents
Radioactive resistant cableInfo
- Publication number
- JPH04206113A JPH04206113A JP2328150A JP32815090A JPH04206113A JP H04206113 A JPH04206113 A JP H04206113A JP 2328150 A JP2328150 A JP 2328150A JP 32815090 A JP32815090 A JP 32815090A JP H04206113 A JPH04206113 A JP H04206113A
- Authority
- JP
- Japan
- Prior art keywords
- insulating layer
- polyolefin
- radioactive
- ethylene
- resistance
- 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
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Insulated Conductors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、原子力発電所、核燃料再処理施設等の放射
線を受ける場所で使用される耐放射線性ケーブルに関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a radiation-resistant cable used in places exposed to radiation such as nuclear power plants and nuclear fuel reprocessing facilities.
従来、原子力発電所等の放射線を受ける場所で使用され
るケーブルの絶縁物としては、ＥＰＰｈ３架橋ポリエチ
レン、シリコーンゴム、ポリ塩化ビニル（ＰＶＣ）等を
用いたものか知られている。Conventionally, EPPh3 crosslinked polyethylene, silicone rubber, polyvinyl chloride (PVC), and the like are known as insulators for cables used in places exposed to radiation such as nuclear power plants.
従来の絶縁物の耐放射線性は、通常２ＭＧｙ以下であり
、さらに難燃性を向上させるために難燃剤を絶縁物に加
えると耐放射線性かさらに低下するという欠点かあった
。そこて、この発明は、耐放射線性及び難燃性に優れた
耐放射線性ケーブルを提供することを目的とする。The radiation resistance of conventional insulators is usually 2 MGy or less, and when a flame retardant is added to the insulator to further improve the flame retardance, the radiation resistance further decreases. Therefore, an object of the present invention is to provide a radiation-resistant cable with excellent radiation resistance and flame retardancy.
上述の目的を達成するため、第１の発明は、導体１外周
に直接あるいは他の絶縁物を介してポリオレフィン若し
くはこれを主成分とするものから成る内部絶縁層２を設
け、内部絶縁層２に接してポリエーテルエーテルケトン
又はポリエーテルイミド又はポリイミドから成る外部絶
縁層３を設けたものである。第２の発明は、内部絶縁層
２のポリオレフィンかポリエチレン、架橋ポリエチレン
、エチレン・プロピレン共重合体、エチレン・αオレフ
ィン共重合体、エチレン・αオレフィン・ジエン共重合
体、エチレン・スチレン共重合体、エチレン・酢酸ビニ
ル共重合体、エチレン・エチルアクリレート共重合体か
ら選択されたものである。In order to achieve the above object, the first invention provides an internal insulating layer 2 made of polyolefin or a material mainly composed of polyolefin on the outer periphery of the conductor 1 either directly or through another insulator, and An external insulating layer 3 made of polyetheretherketone, polyetherimide, or polyimide is provided in contact with it. The second invention is a polyolefin or polyethylene, crosslinked polyethylene, ethylene/propylene copolymer, ethylene/α-olefin copolymer, ethylene/α-olefin/diene copolymer, ethylene/styrene copolymer, It is selected from ethylene/vinyl acetate copolymer and ethylene/ethyl acrylate copolymer.
第３の発明は、ポリオレフィンに芳香族化合物を添加し
た組成物から成る内部絶縁層２を有するものである。The third invention has an internal insulating layer 2 made of a composition in which an aromatic compound is added to polyolefin.
外部絶縁層３として用いられるポリエーテルエーテルケ
トン又はポリエーテルイミド又はポリイミドは、空気中
では耐放射線性に優れ、しかも難燃性に優れ、内部絶縁
層２として用いられるポリオレフィンは、空気中で放射
線に照射される場合に比へてはるかに劣化しにくい。外
部絶縁層３自体は難燃性に優れているため、内部絶縁層
２に難燃剤を配合する必要もない。また、ポリオレフィ
ンに芳香族化合物を添加した場合、耐放射線性の向上が
図れる。The polyetheretherketone, polyetherimide, or polyimide used as the outer insulating layer 3 has excellent radiation resistance and flame retardancy in the air, and the polyolefin used as the inner insulating layer 2 has excellent radiation resistance in the air. It is much less susceptible to deterioration than when exposed to irradiation. Since the outer insulating layer 3 itself has excellent flame retardancy, there is no need to add a flame retardant to the inner insulating layer 2. Furthermore, when an aromatic compound is added to polyolefin, radiation resistance can be improved.
以下にこの発明の実施例を図面を参照にして説明する。 Embodiments of the invention will be described below with reference to the drawings.
第１図に示す第１ないし第３の発明に共通の実施例は、
導体１の外周にポリオレフィン若しくはこれを主成分と
するものから成る内部絶縁層２を設け、この内部絶縁層
２に接して設けられた外部絶縁層３は、ポリエーテルエ
ーテルケトン又はポリエーテルイミド又はポリイミドか
ら成る。導体１は撚り線のみならず単線であっても良い
。導体１と内部絶縁層２との間に他の絶縁物を介在させ
ても良い。第２の発明においては、内部絶縁層２のポリ
オレフィンとして、ポリエチレン、架橋ポリエチレン、
エチレン・プロピレン共重合体、エチレン・αオレフィ
ン共重合体、エチレン・スチレン共重合体、エチレン・
酢酸ビニル共重合体（ＥＶＡ） 、エチレン・エチルア
クリレート共重合体（ＥＥＡ）から選択されたものを用
いる。第３の発明においては、ポリオレフィンに芳香族
化合物を添加した混合物から内部絶縁層２を形成する。An embodiment common to the first to third inventions shown in FIG.
An internal insulating layer 2 made of polyolefin or a material mainly composed of polyolefin is provided around the outer periphery of the conductor 1, and an external insulating layer 3 provided in contact with this internal insulating layer 2 is made of polyetheretherketone, polyetherimide, or polyimide. Consists of. The conductor 1 may be not only a twisted wire but also a single wire. Another insulator may be interposed between the conductor 1 and the internal insulating layer 2. In the second invention, as the polyolefin of the internal insulating layer 2, polyethylene, crosslinked polyethylene,
Ethylene/propylene copolymer, ethylene/α-olefin copolymer, ethylene/styrene copolymer, ethylene/
A material selected from vinyl acetate copolymer (EVA) and ethylene-ethyl acrylate copolymer (EEA) is used. In the third invention, the internal insulating layer 2 is formed from a mixture of polyolefin and an aromatic compound.
芳香族化合物としては、アミン−ケトン系、芳香族第二
級アミン系、モノフェノール系、ヒスフェノール系、ポ
リフェノール系、ベンゾイミダゾール系、ベンゾトリア
ゾール系、フェノールホスファイト系等の化合物か好適
に用いられる。またその添加割合としては、ポリオレフ
ィン１００重量部に対して芳香族化合物１〜５０重量部
か好適に用いられる。As the aromatic compound, compounds such as amine-ketone type, aromatic secondary amine type, monophenol type, hisphenol type, polyphenol type, benzimidazole type, benzotriazole type, and phenol phosphite type are preferably used. . The addition ratio of the aromatic compound to 100 parts by weight of the polyolefin is preferably 1 to 50 parts by weight.
第２図は、第２の発明の実施例として、断面積か５．５
ｍｍ”のケーブルを３本シース４で被覆したものを示し
、内部絶縁層（２）として架橋ポリエチレン、外部絶縁
層（３）としてポリエーテルエーテルケトンを用いた。Figure 2 shows a cross-sectional area of 5.5 mm as an embodiment of the second invention.
The figure shows three cables having a diameter of 1.5 mm'' and covered with a sheath 4, in which crosslinked polyethylene was used as the inner insulating layer (2) and polyether ether ketone was used as the outer insulating layer (3).
これを以下の表１において製造例として種々の特性を示
す。また、第３図は、断面積を５．５ｍｍ２とした３本
のケーブルをシース４て被覆し、ケーブルは導体１に架
橋ポリエチレンから成る絶縁物１００のみを設けたちの
を示す。これを以下の表１において比較例として種々の
特性を示す。シース４としては、製造例及び比較例とも
に、クロロスルフォン化ポリエチレン、クロロプレンゴ
ム、ＰＶＣ等が用いら−れ、ここではクロロスルフォン
化ポリエチレンを用いた。Various properties of this product are shown in Table 1 below as a production example. Further, FIG. 3 shows three cables each having a cross-sectional area of 5.5 mm 2 covered with a sheath 4, in which the conductor 1 is provided with only an insulator 100 made of cross-linked polyethylene. Various characteristics of this are shown as a comparative example in Table 1 below. As the sheath 4, chlorosulfonated polyethylene, chloroprene rubber, PVC, etc. were used in both the production example and the comparative example, and chlorosulfonated polyethylene was used here.
表１
■
′１
Ｅ８ 二引張試験における破断伸度
〔発明の効果〕
以上説明したように、第１の発明によれば、耐放射線性
に優れかつ難燃性にも優れた外部絶縁層か存在すること
で、内部絶縁層は直接空気中に酸素に触れず、放射線に
照射されるため、空気中で放射線に照射される場合に比
へてはるかに劣化しにくくなる。このような２層構造に
することにより、内部絶縁層に難燃剤を配合しなくとも
難燃性か向上し、空気に触れないポリオレフィンから成
る内部絶縁層の存在と空気中における耐放射線性に優れ
るポリエーテルエーテルケトン等から成る外部絶縁層の
存在とによって耐放射線性の向上か図れる。Table 1 ■ '1 E8 Elongation at break in two tensile tests [Effects of the invention] As explained above, according to the first invention, there is an outer insulating layer that has excellent radiation resistance and flame retardancy. By doing so, the internal insulating layer is not directly exposed to oxygen in the air and is irradiated with radiation, so it is much less susceptible to deterioration than when it is exposed to radiation in the air. This two-layer structure improves flame retardancy without adding a flame retardant to the internal insulating layer, and the presence of an internal insulating layer made of polyolefin that does not come into contact with air provides excellent radiation resistance in the air. The radiation resistance can be improved by the presence of an external insulating layer made of polyetheretherketone or the like.
第２の発明によれば、ポリオレフィンとしてポリエチレ
ン等を選択することで、第１の発明の効果の他にケーブ
ルの曲げ性も良好となり、外部絶縁層との相性、例えば
絶縁層同士の密着性か良い等の利点かある。According to the second invention, by selecting polyethylene or the like as the polyolefin, in addition to the effect of the first invention, the bendability of the cable is also improved, and the compatibility with the external insulating layer, such as the adhesion between the insulating layers, is improved. There are some good benefits.
第３の発明によれば、第１の発明の効果の他に、さらに
耐放射線性を一層向上させることかできる。According to the third invention, in addition to the effects of the first invention, radiation resistance can be further improved.
第１図は第１ないし第３の発明の共通の実施例を示す断
面図、第２図は第２の発明の実施例を示す断面図、第３
図は比較例を示す断面図である。
１・・・導体、
２・・・内部絶縁層、
３・・・外部絶縁層、FIG. 1 is a sectional view showing a common embodiment of the first to third inventions, FIG. 2 is a sectional view showing an embodiment of the second invention, and FIG.
The figure is a sectional view showing a comparative example. 1... Conductor, 2... Internal insulating layer, 3... External insulating layer,
Claims (1)
ポリオレフィン若しくはこれを主成分とするものから成
る内部絶縁層（２）を設け、内部絶縁層（２）に接して
ポリエーテルエーテルケトン又はポリエーテルイミド又
はポリイミドから成る外部絶縁層（３）を設けたことを
特徴とする耐放射線性ケーブル。 ２、内部絶縁層（２）のポリオレフィンがポリエチレン
、架橋ポリエチレン、エチレン・プロピレン共重合体、
エチレン・αオレフィン共重合体、エチレン・αオレフ
ィン・ジエン共重合体、エチレン・スチレン共重合体、
エチレン・酢酸ビニル共重合体、エチレン・エチルアク
リレート共重合体から選択されたものであることを特徴
とする請求項１に記載の耐放射線性ケーブル。 ３、ポリオレフィンに芳香族化合物を添加した組成物か
ら成る内部絶縁層（２）を有する請求項１又は請求項２
に記載の耐放射線性ケーブル。[Claims] 1. An internal insulating layer (2) made of polyolefin or a material mainly composed of polyolefin is provided on the outer periphery of the conductor (1) directly or through another insulator, and the internal insulating layer (2) A radiation-resistant cable characterized in that it is provided with an outer insulating layer (3) of polyetheretherketone, polyetherimide or polyimide in contact with it. 2. The polyolefin of the internal insulating layer (2) is polyethylene, crosslinked polyethylene, ethylene/propylene copolymer,
Ethylene/α-olefin copolymer, ethylene/α-olefin/diene copolymer, ethylene/styrene copolymer,
The radiation-resistant cable according to claim 1, characterized in that the cable is selected from ethylene/vinyl acetate copolymer and ethylene/ethyl acrylate copolymer. 3. Claim 1 or Claim 2 comprising an internal insulating layer (2) made of a composition in which an aromatic compound is added to polyolefin.
Radiation resistant cables as described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2328150A JP3023166B2 (en) | 1990-11-28 | 1990-11-28 | Radiation resistant cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2328150A JP3023166B2 (en) | 1990-11-28 | 1990-11-28 | Radiation resistant cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04206113A true JPH04206113A (en) | 1992-07-28 |
| JP3023166B2 JP3023166B2 (en) | 2000-03-21 |
Family
ID=18207047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2328150A Expired - Lifetime JP3023166B2 (en) | 1990-11-28 | 1990-11-28 | Radiation resistant cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3023166B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010170714A (en) * | 2009-01-20 | 2010-08-05 | Hitachi Cable Ltd | Radiation-resistant cable |
| CN110862604A (en) * | 2019-12-03 | 2020-03-06 | 宝胜科技创新股份有限公司 | Halogen-free flame retardant sheath material for nuclear power plant and preparation method thereof |
-
1990
- 1990-11-28 JP JP2328150A patent/JP3023166B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010170714A (en) * | 2009-01-20 | 2010-08-05 | Hitachi Cable Ltd | Radiation-resistant cable |
| CN110862604A (en) * | 2019-12-03 | 2020-03-06 | 宝胜科技创新股份有限公司 | Halogen-free flame retardant sheath material for nuclear power plant and preparation method thereof |
| CN110862604B (en) * | 2019-12-03 | 2023-04-21 | 宝胜科技创新股份有限公司 | A kind of halogen-free flame-retardant sheath material for nuclear power plant and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3023166B2 (en) | 2000-03-21 |
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