CN101465176A - Power cable for 1E grade K3 genus nuclear power plant - Google Patents
Power cable for 1E grade K3 genus nuclear power plant Download PDFInfo
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- CN101465176A CN101465176A CNA200810096605XA CN200810096605A CN101465176A CN 101465176 A CN101465176 A CN 101465176A CN A200810096605X A CNA200810096605X A CN A200810096605XA CN 200810096605 A CN200810096605 A CN 200810096605A CN 101465176 A CN101465176 A CN 101465176A
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Abstract
The invention relates to the technical field of cables, in particular to a Grade 1E and Class K3 power cable used at a nuclear power station. The power cable comprises a cable core, a filling, a belting and a sheath, and is characterized in that the cable core consists of at least two insulated conductors intertwisted with each other; each insulated conductor consists of a conductor, and irradiation crosslinking polyolefin internal insulation and flame retardant crosslinking irradiation external insulation extruding outside the conductor; a void between the insulated conductors is filled by a halogen-free flame retardant oxygen barrier; a halogen-free flame retardant belting coats the insulated conductors and the halogen-free flame retardant oxygen barrier; and a halogen-free flame retardant sheath extrudes outside the halogen-free flame retardant belting. The power cable completely satisfies the design requirements of the nuclear power station, and can execute functions under strict conditions outside containment, and under normal conditions with a seismic load.
Description
Technical field
The present invention relates to the cable technology field, be specifically related to 1E grade K 3 genus nuclear power plant power cable.
Background technology
Cables of nuclear power is mainly used in nuclear reactor factory building, nuclear auxiliary building, steam turbine factory building, and the cable laying mode generally adopts pipeline or wire casing, requires cable to have reliable useful life, thermal stability, moisture resistance, chemical stability and radiation resistance.For guaranteeing the high reliability of system design, the serious economic consequences of avoiding device damage to cause adopts multichannel separate lines system and the device that repeats usually, adopts two cover separate lines systems as power cable, and control cable adopts three cover separate lines systems.
Used in nuclear power station 1E level cable is divided three classes by the security class of nuclear power station electrical system equipment: K1, K2, K3.
Definition about the 1E level---finish that reactor scram, containment are isolated, the emergent cooling of reactor core, reactor waste are derived, the containment vessel thermal conductance goes out, prevent the radioactive substance safe level of the electrical system equipment of function such as environmental emission towards periphery.About the definition of K3 level, be installed in outside the containment, should under nominal situation and earthquake load, can carry out the equipment of its function.
The technological difficulties of cables of nuclear power mainly are 2 points: the one, and the thermal life of insulation must reach more than 40 years; The one, insulation resistance constant K i, minimum 3000M Ω .km in the time of 20 ℃, minimum 30M Ω .km 60 ℃ time the, minimum 3M Ω .km 90 ℃ the time.
Chinese patent application 200520144602.0 discloses a kind of K3 class nuclear power station electricity consumption cable, it comprises cable core, fill, band, shielding, sheath, it is characterized in that: cable core forms by the insulated electric conductor core is stranded, the insulated electric conductor core is made up of the conductor low-smoke halogen-free polyolefin insulation outer with being extruded in conductor, space between the insulated electric conductor core is filled by asbestos cord, at insulated electric conductor core and asbestos cord external application low-smoke non-halogen flame-retardant band parcel, the low-smoke non-halogen flame-retardant band is outer wrapped by polyester belt, polyester belt weaves the copper wire shielding outward, copper wire shielding external application low-smoke non-halogen flame-retardant band parcel, the low-smoke non-halogen flame-retardant band extrudes low-smoke halogen-free flame-retardant sheath outward.The K3 class nuclear power station electricity consumption cable of this utility model meets the nuclear power station designing requirement fully, can reach outside containment under normal condition and the earthquake load and can carry out its function in the condition harshness.
Summary of the invention
The object of the invention provides a kind of 1E grade K 3 genus nuclear power plant power cable.
A kind of 1E grade K 3 genus nuclear power plant power cable, comprise cable core, filling, band, sheath, it is characterized in that: cable core is by two stranded forming of above insulated wire cores, insulated wire cores is by conductor and be extruded in the outer cross-linking radiation polyolefin of conductor insulation and external insulation and form, space between insulated wire cores is filled by the halogen-free flameproof oxygen barrier layer, coat in insulated wire cores and halogen-free flameproof oxygen barrier layer external application halogen-free flameproof band, the halogen-free flameproof band extrudes the halogen-free flameproof sheath outward.
Conductor of the present invention adopts copper wire or tinned copper wire, and conductor meets the regulation of GB/T3956 standard.
In embodiment of the present invention, insulation is 150 ℃ of IXPE in the described cross-linked polyolefin, and external insulation is 125 ℃ of fire-retardant cross-linking radiation polyolefin.
In embodiment of the present invention, described halogen-free flameproof sheath is 90 ℃ of halogen-free anti-flaming polyolefins or 125 ℃ of halogen-free flameproof cross-linking radiation polyolefin, preferred 125 ℃ of halogen-free flameproof cross-linking radiation polyolefin.
In the thermal life test, IXPE material reserved elongation at break is greater than 25%, and wherein the cross-linked polyolefin insulation is that 150 ℃ of IXPE effects are best, meets the requirement of cables of nuclear power to insulating material.
The cables of nuclear power sheath material need satisfy 2 performance requirements: 1. combustion characteristics: the category-A bunched burning test is qualified, the burning smoke density greater than 70%, the Halogen low toxicity; 2. anti-cracking performance.90 ℃ of halogen-free anti-flaming polyolefins or 125 ℃ of halogen-free flameproof cross-linking radiation polyolefin all can meet the requirements, and wherein heat cured 125 ℃ of halogen-free flameproof cross-linking radiation polyolefin are more outstanding in the splitting resistance performance.
1E grade K 3 genus nuclear power plant power cable of the present invention is the 0.6/1KV rank.
The 1E grade K 3 genus nuclear power plant provided by the present invention preparation method of power cable:
The conductor of cable adopts the double-layer coextrusion mode to be extruded on the conductor insulation and outer insulating material in the cross-linked polyolefin by many stranded the making of copper monofilament then, need pass through the cross-linking radiation operation again, makes insulated wire cores.Core is through stranding, filling oxygen barrier layer, band and extrude cross-linking radiation polyolefin oversheath.The cable of making need become finished cable through after the cross-linking radiation operation.
Leading indicator of the present invention:
1, when conductor allows working temperature to be not less than 90 ℃ for a long time, cable identify that using the longevity is more than 40 years.
2, the radiation resistance of cable is: 25 * 10
4Gy.
3, insulation resistance constant K i is not less than 3.67M Ω .km 90 ℃ the time.
4, finished cable has than high electrical property, under 3.5kV power-frequency voltage condition, continues 5 minutes cores and does not puncture.
5, insulated wire cores will be passed through the single testing vertical flammability requirement of IEC60332-1.
6, finished cable meets the category-A bunched burning test requirement of stipulating in the IEC60332-3 standard.
7, the smoke density of finished cable: light transmittance is no less than 70%.
8, cable can satisfy the index of Halogen, low toxicity: during burning test, the acidity of emergent gas (with the pH value representation) should be greater than 4.3; Conductivity is not more than 10 μ s/mm; The poison exponent of insulation and sheath: less than 5.
9,40 years heat ageing analogue tests of finished cable equivalence: aging analogue test (150 ℃ of x1368h), (radiation cumulative dose 251kGy) is qualified for the radiative aging analogue test.
10, aging back finished cable voltage test (after the 20D bending, AC3150V, 5min), cable does not puncture.
11, aging back finished cable vertical tray burning test: length 0.6m (5 samples) partly burns or lost efficacy.
1E grade K 3 genus nuclear power plant provided by the invention meets the nuclear power station designing requirement fully with power cable, can reach outside containment under nominal situation and the earthquake load and can carry out its function in the condition harshness.
Description of drawings
A kind of 0.6/1KV1E grade K 3 genus nuclear power plant of Fig. 1 electric power cross-section of cable schematic diagram.
Embodiment
Below in conjunction with specific embodiment, further illustrate the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.The experimental technique of unreceipted actual conditions in the following example, usually according to normal condition, or the condition of advising according to manufacturer.Ratio and percentage are based on weight, unless stated otherwise.
A kind of 1E grade K 3 genus nuclear power plant power cable, it comprises cable core, fill, band, sheath, it is characterized in that: cable core is by two stranded forming of above insulated electric conductor core, the insulated electric conductor core insulate 2 by conductor 1 with being extruded in conductor 150 ℃ of IXPE outward, fire-retardant 125 ℃ of cross-linking radiation polyolefin external insulations 3 are formed, space between insulated wire cores is filled by halogen-free flameproof oxygen barrier layer 4, coat in insulated wire cores and halogen-free flameproof oxygen barrier layer 4 external application halogen-free flameproof bands 5, extrude 125 ℃ of halogen-free flameproof cross-linking radiation polyolefin jackets 6 outside the halogen-free flameproof band 5.
Scope of the present invention is not subjected to the restriction of described specific embodiments, and described embodiment is only desired also to comprise the method and the component of functional equivalent in the scope of the invention as the single example of illustrating various aspects of the present invention.In fact, except content as herein described, those skilled in the art can easily grasp multiple improvement of the present invention with reference to above description and accompanying drawing.Described improvement also falls within the scope of appended claims.
Claims (6)
1, a kind of 1E grade K 3 genus nuclear power plant power cable, comprise cable core, filling, band, sheath, it is characterized in that: cable core is by two stranded forming of above insulated electric conductor core, insulated wire cores is by conductor and be extruded in the outer cross-linking radiation polyolefin of conductor insulation and cross-linking radiation polyolefin external insulation and form, space between insulated wire cores is filled by the halogen-free flameproof oxygen barrier layer, coat at insulated electric conductor core and halogen-free flameproof oxygen barrier layer external application halogen-free flameproof band, the halogen-free flameproof band extrudes the halogen-free flameproof sheath outward.
2,, it is characterized in that insulation is 150 ℃ of IXPE insulation in the described cross-linked polyolefin according to the described 1E grade K 3 genus nuclear power plant of claim 1 power cable.
3,, it is characterized in that described cross-linked polyolefin external insulation is 125 ℃ of fire-retardant cross-linking radiation polyolefin insulations according to the described 1E grade K 3 genus nuclear power plant of claim 1 power cable.
4,, it is characterized in that described halogen-free flameproof sheath material is 90 ℃ of halogen-free anti-flaming polyolefins or 125 ℃ of halogen-free flameproof cross-linking radiation polyolefin according to the described 1E grade K 3 genus nuclear power plant of claim 1 power cable.
5,, it is characterized in that described halogen-free flameproof sheath material is 125 ℃ of halogen-free flameproof cross-linking radiation polyolefin according to the described 1E grade K 3 genus nuclear power plant of claim 1 power cable.
6,, it is characterized in that described 1E grade K 3 genus nuclear power plant power cable is the 0.6/1KV rank according to the described 1E grade K 3 genus nuclear power plant of claim 1 power cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810096605XA CN101465176A (en) | 2007-12-19 | 2008-04-28 | Power cable for 1E grade K3 genus nuclear power plant |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710172560 | 2007-12-19 | ||
| CN200710172560.5 | 2007-12-19 | ||
| CNA200810096605XA CN101465176A (en) | 2007-12-19 | 2008-04-28 | Power cable for 1E grade K3 genus nuclear power plant |
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| Publication Number | Publication Date |
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| CN101465176A true CN101465176A (en) | 2009-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA200810096605XA Pending CN101465176A (en) | 2007-12-19 | 2008-04-28 | Power cable for 1E grade K3 genus nuclear power plant |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964222A (en) * | 2010-05-24 | 2011-02-02 | 上海赛克力特种电缆有限公司 | IE-grade K1-type control cable for nuclear reactor |
| CN102270527A (en) * | 2011-08-01 | 2011-12-07 | 江苏超能电缆有限公司 | Earthquake-proof cable |
| CN103310893A (en) * | 2013-06-27 | 2013-09-18 | 山东华凌电缆有限公司 | High-performance cable for construction |
| CN103426541A (en) * | 2013-07-31 | 2013-12-04 | 江苏河阳线缆有限公司 | Low-smoke low-halogen flame-retardant power cable |
| CN104183305A (en) * | 2014-08-26 | 2014-12-03 | 山东华凌电缆有限公司 | Electric wire and cable for high-speed train and production method |
| CN105551684A (en) * | 2015-12-08 | 2016-05-04 | 广东华声电器股份有限公司 | Method for wire and cable production through irradiation cross-linking and irradiation cross-linking device thereof |
| CN109559852A (en) * | 2018-11-16 | 2019-04-02 | 尚纬股份有限公司 | A kind of manufacturing method of 1E grades of K3 class cables of used in nuclear power station high fire-retardance low release |
-
2008
- 2008-04-28 CN CNA200810096605XA patent/CN101465176A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964222A (en) * | 2010-05-24 | 2011-02-02 | 上海赛克力特种电缆有限公司 | IE-grade K1-type control cable for nuclear reactor |
| CN102270527A (en) * | 2011-08-01 | 2011-12-07 | 江苏超能电缆有限公司 | Earthquake-proof cable |
| CN103310893A (en) * | 2013-06-27 | 2013-09-18 | 山东华凌电缆有限公司 | High-performance cable for construction |
| CN103310893B (en) * | 2013-06-27 | 2016-02-10 | 山东华凌电缆有限公司 | High-performance cable for construction |
| CN103426541A (en) * | 2013-07-31 | 2013-12-04 | 江苏河阳线缆有限公司 | Low-smoke low-halogen flame-retardant power cable |
| CN103426541B (en) * | 2013-07-31 | 2016-07-06 | 江苏河阳线缆有限公司 | low-smoke low-halogen flame-retardant power cable |
| CN104183305A (en) * | 2014-08-26 | 2014-12-03 | 山东华凌电缆有限公司 | Electric wire and cable for high-speed train and production method |
| CN105551684A (en) * | 2015-12-08 | 2016-05-04 | 广东华声电器股份有限公司 | Method for wire and cable production through irradiation cross-linking and irradiation cross-linking device thereof |
| CN105551684B (en) * | 2015-12-08 | 2017-07-28 | 广东华声电器实业有限公司 | The method and its irradiation cross-linking apparatus of cross-linking radiation production electric wire |
| CN109559852A (en) * | 2018-11-16 | 2019-04-02 | 尚纬股份有限公司 | A kind of manufacturing method of 1E grades of K3 class cables of used in nuclear power station high fire-retardance low release |
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Open date: 20090624 |