CN104951627A - Fire analysis method and system for horizontal multi-layer cable bridges of nuclear power plant - Google Patents
Fire analysis method and system for horizontal multi-layer cable bridges of nuclear power plant Download PDFInfo
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Abstract
The invention relates to a fire analysis method and system for horizontal multi-layer cable bridges of a nuclear power plant. The method comprises following steps: acquiring initial fire source feature information of fire of the horizontal multi-layer cable bridges of the nuclear power plant; acquiring real-time heat release rate of each layer of cable bridge in the fire process according to the initial fire source feature information, geometrical structure parameters of the horizontal multi-layer cable bridges, the longitudinal spreading speed of a cable flame and feature parameters of cable materials; acquiring fire risk feature parameters in confined space according to the initial fire source feature information and the real-time heat release rate of each layer of cable bridge; comparing the fire risk feature parameters with quantitative indexes and judging the fire risk of the horizontal multi-layer cable bridges of the nuclear power plant. According to the method and the system, the conservative principle of the nuclear power plant is met, the differences between single cable bridges in the horizontal multi-layer cable bridges are fully considered, the analysis accuracy is higher, the fire risk of the horizontal multi-layer cable bridges of the nuclear power plant can be analyzed more reasonably, and great support is provided for fire protection design of the cable bridges.
Description
Technical field
The present invention relates to design of nuclear power plant field, particularly relate to a kind of nuclear power plant horizontal multi-layer cable crane span structure fire disaster analyzing method and system.
Background technology
Along with Re-search on Urbanization, modern development, expectation the year two thousand thirty Analyzing Total Electricity Consumption will double than now.Therefore, the carbon emission index before the year two thousand thirty be realized, the low-carbon (LC) clean energy resource comprising nuclear power must be greatly developed.To the year two thousand twenty, Chinese Nuclear Power installed capacity reaches 5,800 ten thousand kilowatts, reaches more than 3,000 ten thousand kilowatts at the capacity of building.But security and economy are two principal elements of restriction nuclear power developing.
Add up according to American Electric Power research institute (Electric Power Research Institute), 1991 is 0.14 time/heap year to 2008 Nian Jian nuclear power plant fire occurrence frequencies, in France EDF event database, the event relevant to fire is 2204 (1975-1995), and fire failure is one of most important threat of nuclear safety.Cable is one of combustible the most general in nuclear power plant, and Browns Ferry nuclear power plants of the U.S. in 1975 cause No. 1 to pile Emergency Cooling System losing efficacy because cable is on fire, and economic loss is heavy, and directly threatens nuclear safety.
For nuclear power fire depth defense principle, traditional fire-fighting scheme does not have dirigibility and specific aim.To this, National Fire Protection Association (NFPA) has promulgated " NFPA-805 ", proposes performance-based fire standard to be applied in the design for fire protection of light water reactor first.In the report " NUREG-1824 " that United States Nuclear Regulatory Commission issues, check and verify regional model software, domain model software prediction result great majority in results display area are all within the range of indeterminacy of experimental result.Therefore, under the prerequisite of nuclear safety principle, carry out quantitative fire risk analysis and assessment based on performance-based principle, significantly can improve in security, economy and specific aim.
In regional model simulation for nuclear power plant's horizontal multi-layer cable crane span structure fire, the setting of burning things which may cause a fire disaster is a very large challenge.At present, general disposal route is that horizontal multi-layer cable crane span structure is regarded as an overall burning things which may cause a fire disaster, ignore the difference of burning between the inner individual cable crane span structure of horizontal multi-layer cable crane span structure, the too high amount of oxygen that have evaluated the consumption of Initial Stage of Fire cable fire, the result of calculation led to errors.Therefore, the horizontal multi-layer cable crane span structure fire risk analysis carried out based on these class methods is also irrational.
Summary of the invention
Based on this, for solving problems of the prior art, the invention provides a kind of nuclear power plant horizontal multi-layer cable crane span structure fire disaster analyzing method and system, under the prerequisite of nuclear power plant's conservatism, more rationally and exactly assess nuclear power plant's horizontal multi-layer cable crane span structure fire risk.
For realizing above-mentioned technical purpose, the embodiment of the present invention adopts following technical scheme:
A kind of nuclear power plant horizontal multi-layer cable crane span structure fire risk analysis method, comprises the steps:
Obtain the initial burning things which may cause a fire disaster characteristic information of the horizontal multi-layer cable crane span structure fire of nuclear power plant;
According to the characteristic parameter of the geometrical structure parameter of described initial burning things which may cause a fire disaster characteristic information, horizontal multi-layer cable crane span structure, the longitudinal rate of spread of cable flame and cable material, obtain the real-time HRR of each layer cable testing bridge in nuclear power plant's horizontal multi-layer cable crane span structure fire process;
According to the real-time HRR of described initial burning things which may cause a fire disaster characteristic information and each layer cable testing bridge, obtain the fire risk characteristic parameter in restricted clearance;
Described fire risk characteristic parameter and quantizating index are contrasted, judges the risk of nuclear power plant's horizontal multi-layer cable crane span structure fire.
And a kind of nuclear power plant horizontal multi-layer cable crane span structure fire risk analysis system, comprising:
Acquisition module, for obtaining the initial burning things which may cause a fire disaster characteristic information of the horizontal multi-layer cable crane span structure fire of nuclear power plant;
Layered method module, for the characteristic parameter of the geometrical structure parameter according to described initial burning things which may cause a fire disaster characteristic information, horizontal multi-layer cable crane span structure, the longitudinal rate of spread of cable flame and cable material, obtain the real-time HRR of each layer cable testing bridge in nuclear power plant's horizontal multi-layer cable crane span structure fire process;
Analog module, for the real-time HRR according to described initial burning things which may cause a fire disaster characteristic information and each layer cable testing bridge, obtains the fire risk characteristic parameter in restricted clearance;
Risk determination module, for described fire risk characteristic parameter and quantizating index being contrasted, judges the risk of nuclear power plant's horizontal multi-layer cable crane span structure fire.
The present invention follows the conservatism of nuclear power plant, analyzing the fire risk of the horizontal multi-layer cable crane span structure of nuclear power plant and when transforming it, consider the difference of burning between the inner individual cable crane span structure of horizontal multi-layer cable crane span structure, obtain the real-time HRR of each layer cable testing bridge in cable testing bridge fire process respectively, relative to the method in conventional art, horizontal multi-layer cable crane span structure being regarded as an overall burning things which may cause a fire disaster and carry out analyzing, its accuracy is higher, more reasonably can analyze nuclear power plant's horizontal multi-layer cable crane span structure fire risk, for the fire protection design of cable testing bridge fire provides beneficial support, ensure the security of nuclear power plant, improve the economy of Construction of Nuclear Electricity.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of a kind of nuclear power plant horizontal multi-layer cable crane span structure fire risk analysis method in the embodiment of the present invention;
The schematic flow sheet of the calculation procedure of a kind of real-time HRR of Fig. 2 for providing in the embodiment of the present invention;
Fig. 3 is the schematic diagram by CFAST simulate for lateral multi-layer cable crane span structure fire development process in the embodiment of the present invention;
Fig. 4 is the structural representation of a kind of nuclear power plant horizontal multi-layer cable crane span structure fire risk analysis system in the embodiment of the present invention.
Embodiment
Below in conjunction with preferred embodiment, content of the present invention is described in further detail.
As shown in Figure 1, a kind of nuclear power plant horizontal multi-layer cable crane span structure fire risk analysis method is provided in the present embodiment, comprises the steps:
S10 obtains the initial burning things which may cause a fire disaster characteristic information of the horizontal multi-layer cable crane span structure fire of nuclear power plant;
S20, according to the characteristic parameter of the geometrical structure parameter of described initial burning things which may cause a fire disaster characteristic information, horizontal multi-layer cable crane span structure, the longitudinal rate of spread of cable flame and cable material, obtains the real-time HRR of each layer cable testing bridge in nuclear power plant's horizontal multi-layer cable crane span structure fire process;
S30, according to the real-time HRR of described initial burning things which may cause a fire disaster characteristic information and each layer cable testing bridge, obtains the fire risk characteristic parameter in restricted clearance;
Described fire risk characteristic parameter and quantizating index contrast by S40, judge the risk of nuclear power plant's horizontal multi-layer cable crane span structure fire.
In an embodiment, the horizontal multi-layer cable crane span structure fire of nuclear power plant initial burning things which may cause a fire disaster characteristic information comprises the area of initial burning things which may cause a fire disaster, the position of initial burning things which may cause a fire disaster, initial burning things which may cause a fire disaster duration and initial fire source power.This initial burning things which may cause a fire disaster characteristic information obtains according to relevant criterion, such as, according to the NUREG/CR-6850 " Fire PRA Methodology for Nuclear Power Facilities " that American Electric Power research institute (Electric Power Institute) and NRC (Nuclear Regulatory Commission) promulgate, in nuclear power plant the area of the initial burning things which may cause a fire disaster of horizontal multi-layer cable crane span structure fire be cable testing bridge width square, be positioned at the ground floor center of horizontal multi-layer cable crane span structure.
After obtaining initial burning things which may cause a fire disaster characteristic information, can according to described initial burning things which may cause a fire disaster characteristic information, the geometrical structure parameter of horizontal multi-layer cable crane span structure (comprises cable testing bridge width, interval between each layer cable testing bridge, the parameters such as the quantity of cable testing bridge inner cable), the characteristic parameter of the longitudinal rate of spread of cable flame and cable material (comprises the horizontal rate of propagation of cable fire, the HRR of unit area cable, unit area combustible mass, cable fire heat, the massfraction of combustible material, the common attribute parameters such as coke rate), obtain the real-time HRR of each layer cable testing bridge in nuclear power plant's horizontal multi-layer cable crane span structure fire process.In a kind of embodiment, calculate by following formula:
L
1＝V
0·t (1)
L
i+1(t)＝L
i+2h
itan(35°) (2)
A
i(t)＝W·L
i(t) (3)
Wherein, t is the time; L
i(t) cable length for burning in i layer cable testing bridge; I is cable floor (i=1,2...); V
0for the horizontal rate of propagation of cable fire; h
ifor the interval between i layer and i+1 layer cable testing bridge; W is cable testing bridge width; A
it () is the area that catches fire in i layer cable testing bridge;
for the HRR of unit area cable;
for i layer cable testing bridge HRR; Δ t is the cable fire duration; M "
cfor unit area combustible mass; Δ H is cable fire heat; N is the quantity of cable testing bridge inner cable; Y
pfor the massfraction of combustible material; υ is coke rate; M ' is the quality of unit cable length.
And according to NUREG/CR-6850 " Fire PRA Methodology for Nuclear Power Facilities ", for the longitudinal rate of spread of cable flame, setting can be simplified as follows: the time of the cable in ground floor cable flame ignition second layer crane span structure is that ground floor cable fire is after 240 seconds; The time of the cable in second layer cable flame ignition third layer crane span structure is that second layer cable fire is after 180 seconds; The time of the cable in third layer cable flame ignition the 4th layer of crane span structure is that third layer cable fire is after 120 seconds; The time of the cable in the 4th layer of cable flame ignition layer 5 crane span structure is that the 4th layer of cable fire is after 60 seconds; When after flame propagation to layer 5, the travel-time of flame between cable testing bridge is spaced apart 60 seconds.
According to above-mentioned formula (1) to formula (6), in conjunction with in NUREG/CR-6850, the simplification of the longitudinal rate of spread of cable flame is set, the real-time HRR of each layer cable testing bridge in nuclear power plant's horizontal multi-layer cable crane span structure fire process is calculated by calculation procedure (calculation procedure such as shown in Fig. 2), then according to the real-time HRR of each layer cable testing bridge, to be emulated by simulation softward or other modes obtain fire risk characteristic parameter in restricted clearance.
In a kind of embodiment, dual-stage model software CFAST (Consolidate Fire And Smoke Transport) in the present embodiment, is adopted to carry out simulate for lateral multi-layer cable crane span structure fire development process.With reference to shown in Fig. 3, the real-time HRR of initial burning things which may cause a fire disaster characteristic information and each layer cable testing bridge is imported the input file of dual-stage model software CFAST, as the burning things which may cause a fire disaster feature that dual-stage model calculates.By dual-stage model software CFAST, the fire risk characteristic parameter in quantum chemical method restricted clearance.In a kind of embodiment, fire risk characteristic parameter comprises the parameters such as thermoflux suffered by heat release rate, the temperature of hot smoke layer, smoke layer height, object temperature change, object.By the quantizating index preset, every fire risk characteristic parameter is contrasted with corresponding quantizating index, thus judge the risk of nuclear power plant's horizontal multi-layer cable crane span structure fire.
When carrying out fire risk analysis to nuclear power plant, in the regional model simulation for nuclear power plant's horizontal multi-layer cable crane span structure fire, the setting of burning things which may cause a fire disaster is a very large challenge.The present invention follows the conservatism of nuclear power plant, for the method in conventional art, horizontal multi-layer cable crane span structure being regarded as an overall burning things which may cause a fire disaster and carry out analyzing, analyzing the fire risk of the horizontal multi-layer cable crane span structure of nuclear power plant and when carrying out fire protection design to it, consider the difference between the inner individual cable crane span structure of horizontal multi-layer cable crane span structure, obtain the real-time HRR of each layer cable testing bridge in cable testing bridge fire process respectively, its accuracy is higher, more reasonably can analyze nuclear power plant's horizontal multi-layer cable crane span structure fire risk, for the fire protection design of cable testing bridge fire provides beneficial support, ensure the security of nuclear power plant, improve the economy of nuclear power plant construction.
The present invention also provides a kind of nuclear power plant horizontal multi-layer cable crane span structure fire risk analysis system, provides a specific embodiment of this analytic system below.
As shown in Figure 4, the horizontal multi-layer cable crane span structure fire risk analysis system of the nuclear power plant in the present embodiment comprises:
Acquisition module 10, for obtaining the initial burning things which may cause a fire disaster characteristic information of the horizontal multi-layer cable crane span structure fire of nuclear power plant;
Layered method module 20, for the characteristic parameter of the geometrical structure parameter according to described initial burning things which may cause a fire disaster characteristic information, horizontal multi-layer cable crane span structure, the longitudinal rate of spread of cable flame and cable material, obtain the real-time HRR of each layer cable testing bridge in nuclear power plant's horizontal multi-layer cable crane span structure fire process;
Analog module 30, for the real-time HRR according to described initial burning things which may cause a fire disaster characteristic information and each layer cable testing bridge, obtains the fire risk characteristic parameter in restricted clearance;
Risk determination module 40, for described fire risk characteristic parameter and quantizating index being contrasted, judges the risk of nuclear power plant's horizontal multi-layer cable crane span structure fire.
In an embodiment, the horizontal multi-layer cable crane span structure fire of nuclear power plant initial burning things which may cause a fire disaster characteristic information comprises the area of initial burning things which may cause a fire disaster, the position of initial burning things which may cause a fire disaster, initial burning things which may cause a fire disaster duration and initial fire source power.This initial burning things which may cause a fire disaster characteristic information obtains according to relevant criterion, such as, according to the NUREG/CR-6850 " Fire PRA Methodology for Nuclear Power Facilities " that American Electric Power research institute (Electric Power Institute) and NRC (Nuclear Regulatory Commission) promulgate, in nuclear power plant the area of the initial burning things which may cause a fire disaster of horizontal multi-layer cable crane span structure fire be cable testing bridge width square, be positioned at the ground floor center of horizontal multi-layer cable crane span structure.
After obtaining initial burning things which may cause a fire disaster characteristic information by acquisition module 10, layered method module 20, according to the characteristic parameter of the geometrical structure parameter of initial burning things which may cause a fire disaster characteristic information, horizontal multi-layer cable crane span structure (comprising quantity etc. the information of the interval between cable testing bridge width, each layer cable testing bridge, cable testing bridge inner cable), the longitudinal rate of spread of cable flame and cable material, obtains the real-time HRR of each layer cable testing bridge in nuclear power plant's horizontal multi-layer cable crane span structure fire process.In a kind of embodiment, calculate by following formula:
L
1＝V
0·t (1)
L
i+1(t)＝L
i+2h
itan(35°) (2)
A
i(t)＝W·L
i(t) (3)
Wherein, t is the time; L
i(t) cable length for burning in i layer cable testing bridge; I is cable floor (i=1,2...); V
0for the horizontal rate of propagation of cable fire; h
ifor the interval between i layer and i+1 layer cable testing bridge; W is cable testing bridge width; A
it () is the area that catches fire in i layer cable testing bridge;
for the HRR of unit area cable;
for i layer cable testing bridge HRR; Δ t is the cable fire duration; M "
cfor unit area combustible mass; Δ H is cable fire heat; N is the quantity of cable testing bridge inner cable; Y
pfor the massfraction of combustible material; υ is coke rate; M ' is the quality of unit cable length.
And according to NUREG/CR-6850 " Fire PRA Methodology for Nuclear Power Facilities ", for the longitudinal rate of spread of cable flame, setting can be simplified as follows: the time of the cable in ground floor cable flame ignition second layer crane span structure is that ground floor cable fire is after 240 seconds; The time of the cable in second layer cable flame ignition third layer crane span structure is that second layer cable fire is after 180 seconds; The time of the cable in third layer cable flame ignition the 4th layer of crane span structure is that third layer cable fire is after 120 seconds; The time of the cable in the 4th layer of cable flame ignition layer 5 crane span structure is that the 4th layer of cable fire is after 60 seconds; When after flame propagation to layer 5, the travel-time of flame between cable testing bridge is spaced apart 60 seconds.
According to above-mentioned formula (1) to formula (6), in conjunction with the simplification setting in NUREG/CR-6850, the real-time HRR of each layer cable testing bridge in nuclear power plant's horizontal multi-layer cable crane span structure fire process is calculated by calculation procedure, then by analog module 30, according to the fire risk characteristic parameter in the real-time HRR computation-bound space of each layer cable testing bridge.
In a kind of embodiment, analog module 30 adopts dual-stage model software CFAST (Consolidate Fire And Smoke Transport) to carry out simulate for lateral multi-layer cable crane span structure fire development process.The real-time HRR of each layer cable testing bridge and initial burning things which may cause a fire disaster characteristic information are imported the input file of dual-stage model software CFAST, as the burning things which may cause a fire disaster feature that dual-stage model calculates by analog module 30.By dual-stage model software CFAST, the fire risk characteristic parameters such as thermoflux suffered by the change of the heat release rate in quantum chemical method restricted clearance, the temperature of hot smoke layer, smoke layer height, object temperature, object.
Finally, the quantizating index of risk determination module 40 by presetting, the every fire risk characteristic parameter exported by analog module 30 contrasts with corresponding quantizating index, thus judges the risk of nuclear power plant's horizontal multi-layer cable crane span structure fire.According to venture analysis result, the horizontal multi-layer cable crane span structure fire of technician to nuclear power plant carries out fire protection design, ensures the security of nuclear power plant, improves the economy of nuclear power plant construction.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this instructions is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. nuclear power plant's horizontal multi-layer cable crane span structure fire risk analysis method, is characterized in that, comprise the steps:
Obtain the initial burning things which may cause a fire disaster characteristic information of the horizontal multi-layer cable crane span structure fire of nuclear power plant;
According to the characteristic parameter of the geometrical structure parameter of described initial burning things which may cause a fire disaster characteristic information, horizontal multi-layer cable crane span structure, the longitudinal rate of spread of cable flame and cable material, obtain the real-time HRR of each layer cable testing bridge in nuclear power plant's horizontal multi-layer cable crane span structure fire process;
According to the real-time HRR of described initial burning things which may cause a fire disaster characteristic information and each layer cable testing bridge, obtain the fire risk characteristic parameter in restricted clearance;
Described fire risk characteristic parameter and quantizating index are contrasted, judges the risk of nuclear power plant's horizontal multi-layer cable crane span structure fire.
2. nuclear power plant according to claim 1 horizontal multi-layer cable crane span structure fire disaster analyzing method, is characterized in that, described initial burning things which may cause a fire disaster characteristic information comprises the area of initial burning things which may cause a fire disaster, the position of initial burning things which may cause a fire disaster, initial burning things which may cause a fire disaster duration and initial fire source power.
3. nuclear power plant according to claim 2 horizontal multi-layer cable crane span structure fire disaster analyzing method, it is characterized in that, when obtaining the real-time HRR of each layer cable testing bridge in nuclear power plant's horizontal multi-layer cable crane span structure fire process according to the characteristic parameter of the geometrical structure parameter of described initial burning things which may cause a fire disaster characteristic information, horizontal multi-layer cable crane span structure, the longitudinal rate of spread of cable flame and cable material, following formula is adopted to calculate:
L
1＝V
0·t
L
i+1(t)＝L
i+2h
itan(35°)
A
i(t)＝W·L
i(t)
Wherein, t is the time; L
i(t) cable length for burning in i layer cable testing bridge; I is cable floor (i=1,2...); V
0for the horizontal rate of propagation of cable fire; h
ifor the interval between i layer and i+1 layer cable testing bridge; W is cable testing bridge width; A
it () is the area that catches fire in i layer cable testing bridge;
for the HRR of unit area cable;
for i layer cable testing bridge HRR; Δ t is the cable fire duration; M "
cfor unit area combustible mass; Δ H is cable fire heat; N is the quantity of cable testing bridge inner cable; Y
pfor the massfraction of combustible material; V is coke rate; M ' is the quality of unit cable length.
4. nuclear power plant according to claim 1 horizontal multi-layer cable crane span structure fire disaster analyzing method, it is characterized in that, according to the real-time HRR of described initial burning things which may cause a fire disaster characteristic information and each layer cable testing bridge, the process obtaining the fire risk characteristic parameter in restricted clearance comprises the steps:
The real-time HRR of described initial burning things which may cause a fire disaster characteristic information and each layer cable testing bridge is imported the input file of dual-stage model software CFAST, the fire risk characteristic parameter in quantum chemical method restricted clearance.
5. nuclear power plant according to any one of claim 1 to 4 horizontal multi-layer cable crane span structure fire disaster analyzing method, it is characterized in that, described fire risk characteristic parameter comprises: the thermoflux that the change of the temperature of heat release rate, hot smoke layer, smoke layer height, object temperature and object are subject to.
6. nuclear power plant's horizontal multi-layer cable crane span structure fire risk analysis system, is characterized in that, comprising:
Acquisition module, for obtaining the initial burning things which may cause a fire disaster characteristic information of the horizontal multi-layer cable crane span structure fire of nuclear power plant;
Layered method module, for the characteristic parameter of the geometrical structure parameter according to described initial burning things which may cause a fire disaster characteristic information, horizontal multi-layer cable crane span structure, the longitudinal rate of spread of cable flame and cable material, obtain the real-time HRR of each layer cable testing bridge in nuclear power plant's horizontal multi-layer cable crane span structure fire process;
Analog module, for the real-time HRR according to described initial burning things which may cause a fire disaster characteristic information and each layer cable testing bridge, obtains the fire risk characteristic parameter in restricted clearance;
Risk determination module, for described fire risk characteristic parameter and quantizating index being contrasted, judges the risk of nuclear power plant's horizontal multi-layer cable crane span structure fire.
7. nuclear power plant according to claim 6 horizontal multi-layer cable crane span structure fire disaster analyzing system, is characterized in that, described initial burning things which may cause a fire disaster characteristic information comprises the area of initial burning things which may cause a fire disaster, the position of initial burning things which may cause a fire disaster, initial burning things which may cause a fire disaster duration and initial fire source power.
8. nuclear power plant according to claim 7 horizontal multi-layer cable crane span structure fire disaster analyzing system, it is characterized in that, described layered method module, when the characteristic parameter of the geometrical structure parameter according to described initial burning things which may cause a fire disaster characteristic information, horizontal multi-layer cable crane span structure, the longitudinal rate of spread of cable flame and cable material obtains the real-time HRR of each layer cable testing bridge in nuclear power plant's horizontal multi-layer cable crane span structure fire process, adopts following formula to calculate:
L
1＝V
0·t
L
i+1(t)＝L
i+2h
itan(35°)
A
i(t)＝W·L
i(t)
Wherein, t is the time; L
i(t) cable length for burning in i layer cable testing bridge; I is cable floor (i=1,2...); V
0for the horizontal rate of propagation of cable fire; h
ifor the interval between i layer and i+1 layer cable testing bridge; W is cable testing bridge width; A
it () is the area that catches fire in i layer cable testing bridge;
for the HRR of unit area cable;
for i layer cable testing bridge HRR; Δ t is the cable fire duration; M "
cfor unit area combustible mass; Δ H is cable fire heat; N is the quantity of cable testing bridge inner cable; Y
pfor the massfraction of combustible material; υ is coke rate; M ' is the quality of unit cable length.
9. nuclear power plant according to claim 6 horizontal multi-layer cable crane span structure fire disaster analyzing system, it is characterized in that, the real-time HRR of described initial burning things which may cause a fire disaster characteristic information and each layer cable testing bridge is imported the input file of dual-stage model software CFAST by described analog module, the fire risk characteristic parameter in quantum chemical method restricted clearance.
10. the horizontal multi-layer cable crane span structure fire disaster analyzing system of the nuclear power plant according to any one of claim 6 to 9, it is characterized in that, described fire risk characteristic parameter comprises: the thermoflux that the change of the temperature of heat release rate, hot smoke layer, smoke layer height, object temperature and object are subject to.
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| CN105354767A (en) * | 2015-11-19 | 2016-02-24 | 广州中国科学院工业技术研究院 | Panel fire risk quantitative analysis method and system for master control room of nuclear power plant |
| CN106710652A (en) * | 2016-11-01 | 2017-05-24 | 广州中国科学院工业技术研究院 | Fire source power monitoring system in confined space of nuclear power plant |
| CN110110443A (en) * | 2019-05-08 | 2019-08-09 | 哈尔滨理工大学 | It is a kind of for quickly examining the emulation mode of the flat combustion characteristics of single cable water |
| CN111159960A (en) * | 2019-12-31 | 2020-05-15 | 国网陕西省电力公司西安供电公司 | Numerical simulation method for fire caused by cable fault in tunnel |
| CN113434807A (en) * | 2021-05-20 | 2021-09-24 | 广州中国科学院工业技术研究院 | Method and system for predicting power of cable combustion fire source |
| CN116663910A (en) * | 2023-07-03 | 2023-08-29 | 济南达材信息科技有限公司 | Cable bridge fire risk analysis method and system |
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| CN106710652B (en) * | 2016-11-01 | 2018-06-29 | 广州中国科学院工业技术研究院 | Fire fire source power monitors system in nuclear power plant's restricted clearance |
| CN110110443A (en) * | 2019-05-08 | 2019-08-09 | 哈尔滨理工大学 | It is a kind of for quickly examining the emulation mode of the flat combustion characteristics of single cable water |
| CN111159960A (en) * | 2019-12-31 | 2020-05-15 | 国网陕西省电力公司西安供电公司 | Numerical simulation method for fire caused by cable fault in tunnel |
| CN111159960B (en) * | 2019-12-31 | 2023-05-12 | 国网陕西省电力公司西安供电公司 | Numerical simulation method for fire caused by cable fault in tunnel |
| CN113434807A (en) * | 2021-05-20 | 2021-09-24 | 广州中国科学院工业技术研究院 | Method and system for predicting power of cable combustion fire source |
| CN113434807B (en) * | 2021-05-20 | 2023-04-28 | 广州中国科学院工业技术研究院 | Method and system for predicting power of cable combustion fire source |
| CN116663910A (en) * | 2023-07-03 | 2023-08-29 | 济南达材信息科技有限公司 | Cable bridge fire risk analysis method and system |
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