CN106782718B - A kind of the water logging subregion dividing system and method for nuclear power plant - Google Patents

A kind of the water logging subregion dividing system and method for nuclear power plant Download PDF

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Publication number
CN106782718B
CN106782718B CN201611144681.4A CN201611144681A CN106782718B CN 106782718 B CN106782718 B CN 106782718B CN 201611144681 A CN201611144681 A CN 201611144681A CN 106782718 B CN106782718 B CN 106782718B
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water logging
water
subregion
equipment
logging
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CN106782718A (en
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梁博
陈莉萍
刘爽阳
吕兴兵
黄云
王成章
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China General Nuclear Power Corp
China Nuclear Power Engineering Co Ltd
Shenzhen China Guangdong Nuclear Engineering Design Co Ltd
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China General Nuclear Power Corp
China Nuclear Power Engineering Co Ltd
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D3/00—Control of nuclear power plant
    • G21D3/04—Safety arrangements
    • G21D3/06—Safety arrangements responsive to faults within the plant
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D1/00—Details of nuclear power plant
    • G21D1/02—Arrangements of auxiliary equipment
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Pipeline Systems (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

The invention discloses a kind of water logging subregion dividing systems of nuclear power plant, which is characterized in that including：Water logging subregion Preliminary division module, for according to water logging source in nuclear power plant region and important equipment distribution situation, the division of water logging subregion tentatively to be carried out to the region；Water logging water level computing module is connect with the water logging subregion Preliminary division module, for calculating the water logging water level in each water logging subregion；The determination of water logging subregion and optimization module, it is connect with the water logging water level computing module, for the influence according to water logging water level to the important equipment in corresponding subregion, it determines existing subregion or optimizes and revises water logging subregion, it is effectively isolated the equipment and component of the different safety series for executing same security function, avoids causing the different series equipment for executing some security function to generate common mode failure with a water logging.In addition, the invention also discloses a kind of water logging subregion division methods of nuclear power plant.

Description

A kind of the water logging subregion dividing system and method for nuclear power plant
Technical field
The present invention relates to nuclear energy security fields, more specifically, more particularly to a kind of nuclear power plant water logging subregion divide system System and method.
Background technology
Internal water logging is common one of the inside disaster of nuclear power plant, and the submergence effect of internal water logging can be such that nuclear safety correlation sets Standby failure, and then its security function can not be executed, therefore, prevention and alleviation appropriate must be taken to arrange nuclear power plant's inside water logging It applies, to ensure that nuclear safety is not damaged.
Existing nuclear power plant takes the measures such as floor drain, drainage ditch and threshold to limit harm caused by internal water logging, Internal water logging occurs for these measures and accumulates to arrive certain altitude in nuclear power plant's workshop, and may influence npp safety correlation and set Standby normal operation can alleviate internal water logging and cause to a certain extent in the case of interfering it to execute safe shutdown function Consequence.But these measures do not account for occurring in region the specific situation of water logging, without systematic combination redundant system yet Arrangement and mill construction on consideration carry out the protection of water logging, it is insufficient to be likely to result in safeguard procedures adequacy, to So that internal water logging is spread between zones, the risk of common mode failure is caused.
Therefore, how existing internal water logging guard technology scheme is optimized, is identified and is evaluated using systemic water logging Method, comprehensive water logging subregion is carried out to nuclear power workshop, is effectively isolated the different safety series for executing same security function Equipment and component avoid causing the different series equipment for executing some security function to generate common mode failure with a water logging, become Urgent problem to be solved.
Invention content
The present invention is directed to the specific situation for not accounting for that internal water logging occurs in nuclear power plant region in the prior art, does not also have The arrangement of systematic combination redundant system and the consideration on mill construction carry out the protection of internal water logging, provide a seed nucleus The water logging subregion dividing system and method for power plant optimize water logging guard technology scheme inside existing nuclear power plant, utilize system The method of system property water logging identification and evaluation, carries out comprehensive water logging subregion to nuclear power workshop, is effectively isolated and executes same safe work( The equipment and component of the different safety series of energy avoid causing to execute the different series equipment of some security function with a water logging Generate common mode failure.
The present invention provides a kind of water logging subregion dividing systems of nuclear power plant, including：Water logging subregion Preliminary division module is used Water logging source and important equipment distribution situation according to nuclear power plant region, tentatively carry out the region division of water logging subregion；Water Waterflooding position computing module is connect with the water logging subregion Preliminary division module, for calculating the water logging water in each water logging subregion Position；The determination of water logging subregion and optimization module, connect with the water logging water level computing module, are used for according to water logging water level to corresponding The influence of important equipment in subregion determines existing subregion or optimizes and revises water logging subregion.
Preferably, the water logging subregion Preliminary division module includes：Function zoning sub-module, for the soil by nuclear island factory building Structure, room layout, system deployment scenarios are built, it is independent mutually that workshop is pressed the function different demarcation that system executes by floor height Function division；Water logging identifing source module is connected with the function zoning sub-module, and existing in room or area for identification may Cause the water logging source of water logging effect；Important system and equipment identification module are connected with the water logging identifing source module, for determining Important system and equipment in region；Water logging subregion division module, is connected with the important system and equipment identification module, is used for Water logging subregion inside Preliminary division.
Preferably, the water logging water level computing module calculates water logging water level by the following method：
H=Q/A
Wherein：H is water logging water level；
Q is water logging total flow；
A is net floor area.
Preferably, when water logging source is tank body, water logging total flow Q is tank body total measurement (volume)；When water logging source is other types, The computational methods of water logging total flow Q are：
Q=qST
Wherein：Q is pipe flow speed at cut；
S is Break size；
T is the pipeline leakage time.
Preferably, the water logging subregion is determining and optimization module further includes：Evaluation module is influenced, the water logging water level is connected Computing module, for evaluating influence of the water logging water level to the important equipment in respective partition；Evaluation module again connects the shadow Evaluation module connection is rung, for when the influence evaluation module judges that highest water logging water level influences important equipment, considering have Ideal water logging water level is calculated in the case of sump pump, pumping equipment again, evaluates ideal water logging water level to the weight in respective partition Want the influence of equipment；It determines division module, knows with the influence evaluation module, the evaluation module again and the water logging source Other module be connected, for work as the influence evaluation module judge highest water logging water level do not influence important equipment or it is described again When evaluation module judges that ideal water logging water level does not influence important equipment, determine that the water logging subregion of the subregion divides；Optimize subregion mould Block is connected with the evaluation module again and the water logging water level computing module, for sentencing when the evaluation module again When disconnected ideal water logging water level influences important equipment, water logging subregion or the corresponding safeguard procedures of supplement are optimized and revised.
Preferably, the water logging source includes aqueduct rupture, pump mechanical sealing failure, water tank rupture, fire-fighting system Triggering and the fluid from floor above and adjacent domain.
Preferably, the important system and equipment include internal water logging cause its failure can influence power plant safe shutdown or The system and equipment that water logging event is alleviated, the system that the safe shutdown requires be whether had according to system it is following for maintaining The function of safe shutdown and determination：It introduces enough negative reactivities and reactor is maintained into subcritical state；Stacking pressure will be reacted Water level in force container maintains acceptable level, and clad temperature can be taken out of by, which ensureing, increases the heat generated to prevent fuel packet Shell fails；Prevent reactor pressure vessel pressure from exceeding security restriction；Discharge waste heat prevents combustion to reach and maintain shutdown state Material damages and by containment pressure limit under design value；It provides enough executing and controlling the safe shutdown function Process monitoring；Support function is provided for the operation of the equipment for the safe shutdown.
Preferably, the computational methods of the ideal water logging water level are：
h1=(Q-B)/A
Wherein：h1For ideal water logging water level；
Q is water logging total flow；
B is the drain discharge of sump pump, pumping equipment；
A is net floor area.
The present invention also provides a kind of water logging subregion division methods of nuclear power plant, include the following steps:
S1, according to water logging source in nuclear power plant region and important equipment distribution situation, water logging subregion is tentatively carried out to the region Division；
Water logging water level in S2, each water logging subregion of calculating；
S3, the influence according to water logging water level to the important equipment in corresponding subregion determine existing subregion or optimize and revise Water logging subregion.
Preferably, the step S1 further includes：
S11, by the civil engineering structure of nuclear island factory building, room layout, system deployment scenarios, by workshop by floor height by system execution Function different demarcation be mutual independent function division；
There is the water logging source for being likely to result in water logging effect in S12, identification room or area；
S13, system and equipment important in region are determined；
Water logging subregion inside S14, Preliminary division.
Preferably, water logging water level is calculated by the following method in the step S2：
H=Q/A
Wherein：H is water logging water level；
Q is water logging total flow；
A is net floor area.
Preferably, when water logging source is tank body, water logging total flow Q is tank body total measurement (volume)；When water logging source is other types, The computational methods of water logging total flow Q are：
Q=qST
Wherein：Q is pipe flow speed at cut；
S is Break size；
T is the pipeline leakage time.
Preferably, the step S3 further includes：
S31, influence of the evaluation water logging water level to the important equipment in respective partition, if highest water logging position do not influence it is important Equipment carries out step S33, if highest water logging position influence important equipment, carries out step S32；
S32, it calculates ideal water logging water level again in the case where considering with sump pump, pumping equipment, evaluates ideal water Influence of the waterflooding position to the important equipment in respective partition carries out step if ideal water logging water level does not influence important equipment S33 carries out step S34 if ideal water logging water level influences important equipment；
S33, determine that the water logging subregion of the subregion divides, repeating said steps S11 proceeds by the water logging in next region Subregion divides；
S34, water logging subregion or the corresponding safeguard procedures of supplement are optimized and revised, then repeats to proceed by subsequently from step S2 Step, until evaluation highest water logging position does not influence to evaluate ideal water in important equipment or the step S32 in the step S31 When waterflooding position does not influence important equipment, then carry out step S33.
Preferably, water logging source described in the step S11 includes aqueduct rupture, pump mechanical sealing failure, water tank Rupture, fire-fighting system triggering and the fluid from floor above and adjacent domain.
Preferably, system and equipment important in the step S12 include that internal water logging causes its failure that can influence power plant The system and equipment that safe shutdown or water logging event are alleviated, the system that the safe shutdown requires be whether had according to system under It arranges for maintaining the function of safe shutdown and determination：It introduces enough negative reactivities and reactor is maintained into subcritical state； Water level in reactor pressure vessel is maintained into acceptable level, ensure can to take out of clad temperature increase the heat that generates with Prevent fuel can from failing；Prevent reactor pressure vessel pressure from exceeding security restriction；Waste heat is discharged to reach and maintain shutdown State prevents fuel from damaging and by containment pressure limit under design value；To executing and controlling the safe shutdown work( Enough process monitorings can be provided；Support function is provided for the operation of the equipment for the safe shutdown.
Preferably, the computational methods of ideal water logging water level are in the step S32：
h1=(Q-B)/A
Wherein：h1For ideal water logging water level；
Q is water logging total flow；
B is the drain discharge of sump pump, pumping equipment；
A is net floor area.
One or more technical solutions that the present invention program provides, have at least the following technical effects or advantages：In conjunction with water It floods source, existing structure and connection situation and has carried out comprehensive water logging subregion；By the important equipment of identification, according to knot after evaluation Whether fruit receives that supplement safeguard procedures can be taken, the equipment to be effectively isolated the different safety series for executing same security function And component；By the water logging subregion of division and its optimization, avoid causing to execute the not homology of some security function with a water logging Row equipment generates common mode failure.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings Attached drawing.
Fig. 1 is nuclear power plant's water logging subregion dividing system structure chart that first embodiment of the invention provides；
Fig. 2 is nuclear power plant's water logging subregion division methods flow chart that second embodiment of the invention provides；
Fig. 3 is nuclear power plant's water logging subregion division methods flow chart that third embodiment of the invention provides；
Fig. 4 is the division schematic diagram of the water logging subregion for nuclear power plant's fire compartment that fourth embodiment of the invention provides.
Specific implementation mode
The embodiment of the present invention solves the prior art by providing a kind of the water logging subregion dividing system and method for nuclear power plant Present in do not account for occurring in nuclear power plant region the specific situation of internal water logging, also without systematic combination redundant system Arrangement and mill construction on consider the problems of to carry out the protection of internal water logging, to flood preventing inside existing nuclear power plant Technical solution optimizes, and the method for being identified and being evaluated using systemic water logging carries out comprehensive water logging subregion to nuclear power workshop, It is effectively isolated the equipment and component of the different safety series for executing same security function, avoids causing to execute some with a water logging The different series equipment of security function generates common mode failure.
Technical solution in order to better understand the present invention, below in conjunction with Figure of description and specific implementation mode to upper It states technical solution to be described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to the application The detailed description of technical solution, rather than to the restriction of technical scheme, in the absence of conflict, the present invention is implemented Technical characteristic in example and embodiment can be combined with each other.
Embodiment one
Shown in Figure 1, first embodiment of the invention provides a kind of water logging subregion dividing system of nuclear power plant, packet It includes：Water logging subregion Preliminary division module 1 is used for according to water logging source in nuclear power plant region and important equipment distribution situation, to the area Domain tentatively carries out the division of water logging subregion；Water logging water level computing module 2 is connect with the water logging subregion Preliminary division module 1, is used Water logging water level in each water logging subregion of calculating；The determination of water logging subregion and optimization module 3, with the water logging water level computing module 2 connections determine existing subregion or optimize and revise water for the influence according to water logging water level to the important equipment in corresponding subregion Flood subregion.
Specifically, the water logging subregion Preliminary division module 1 further includes：Function zoning sub-module 11, for pressing nuclear island factory The civil engineering structure in room, room layout, system deployment scenarios, the function different demarcation that workshop is executed by floor height by system is mutual Independent function division；There is the water for being likely to result in water logging effect in room or area for identification in water logging identifing source module 12 Flood source；Important system and equipment identification module 13 are connected with the water logging identifing source module 12, important in region for determining System and equipment；Water logging subregion division module 14, is connected with the important system and equipment identification module 13, is used for Preliminary division Internal water logging subregion.
In the present embodiment, the water logging source that the water logging identifing source module 12 identifies includes aqueduct rupture, pump machine tool Seal failure, water tank rupture, fire-fighting system triggering and the fluid from floor above and adjacent domain.For the above water logging It is analyzed according to following criterion in source：
12a) for high energy pipeline, it is assumed that circumferential rupture occurs；For middle energy pipeline, it is assumed that there are through-wall crack.Cut Assume to be equal to the pipe thickness of 1/2 internal diameter of the pipeline × 1/2 in region.
12b) for main water supply and main steam pipe, it is assumed that there are the cut of a 0.1m2.Containment building annular space Interior main steam or water-supply line is not required to assume can there is cut because there is the presence of casing.
12c) pipeline cut is assumed only to occur during normal operation, for only during non-100% Power operation of power plant The part high energy piping of pressure-bearing should assume cut by most serious situation.
12d) assume that pipeline of the nominal diameter less than or equal to 25mm will not rupture.
When 12e) some water tank ruptures, it is assumed that the water loading amount of entire babinet is all discharged.
12f) compartment water logging source should not necessarily be limited by the system in compartment, also should include the water logging source outside compartment.External water logging Source includes that ground is hydrophobic and the hydrophobic reflux of equipment, hydrophobic, or the water through being damaged structures in other regions (such as under door) It flows (collapsing for such as floor).
12g) bellows and expansion joint of circulation must assume that single bellows or expansion joint are entirely ineffective.
Water logging must assume that all fire-fighting systems are all run in considered region caused by 12h) being acted by fire-fighting system. The result that action may be caused by natural fire event, maloperation or heat source (such as steam pipe line cut) generates.However, using The malfunction of the dry type fire extinguishing system of closed nozzle can be ignored.
12i) for seismic events, any single (I class of non-antidetonation and without pressure side without aseismic analysis must be assumed Boundary's integrality aseismic analysis) thrashing.Pipeline circumferential direction, which is broken, to be assumed for high energy systems, middle energy system must be assumed to pass through Through cracks line.Each compartment must select the break location of consequence most serious.
12j) there are redundancy vacuum demolition set and overpressure protection, or has the I class tank (case) of antidetonation of the opening communicated with air It is assumed that will not fail.I class tank (case) of antidetonation and I class tank (case) of non-antidetonation without these devices must assume the water of entire babinet Loading amount is all discharged.
The possibility for causing water logging by system mismatch must 12k) be considered in water logging evaluation.System mismatch may by program or The mistake of operator causes, or drains by inappropriate isolation of system or before repair and cause, or is caused by the mistake operation of equipment.
12l) water logging volume is considered as secondary water logging source in compartment.Such as：The cut of power station heat supply pipeline causes fire-fighting to be sprayed The malfunction of leaching system；Pipeline whipping or the failure that other fluid systems may be caused from the injection of imaginary cut.
12m) since the total Water of demineralized water and hot-water heating system is limited, it is assumed that the two systems are not weights in steam turbine workshop Want water logging source.
Specifically, the important system and equipment that the important system and equipment identification module 13 identify includes internal water logging Cause the system and equipment that its failure can influence the safe shutdown of power plant or water logging event is alleviated, the system that the safe shutdown requires Be whether had the function of according to system it is following for maintaining safe shutdown and determination：
It 13a) introduces enough negative reactivities and reactor is maintained into subcritical state；
The water level in reactor pressure vessel 13b) is maintained into acceptable level, guarantee can take clad temperature raising out of The heat of generation is to prevent fuel can from failing；
13c) prevent reactor pressure vessel pressure from exceeding security restriction；
13d) discharge waste heat is to reach and maintain shutdown state, fuel is prevented to damage and set containment pressure limit Under evaluation；
13e) enough process monitorings are provided to executing and controlling safe shutdown function；
13f) operation for the equipment for safe shutdown provides support function.
Specifically, mainly the water that internal water logging generates is led to by the way of white-out in terms of flood preventing due to nuclear power plant The approach such as lower gap or floor drain of moving into one's husband's household upon marriage give off safety critical area, and (LOCA accident occurred after major accident in containment removes Outside), therefore the water logging subregion inside Preliminary division of water logging subregion division module 14 mainly follows following principle：
It 14a) is based on existing mill construction and divides partition boundaries, the identification of function that nuclear island factory building is executed by system in region For mutual independent function division, the function division includes electric meter region, mechanical equipment region, ventilation equipment area, three Useless system area, master control region and personnel channel area.
14b) in same function division, Safety Redundancy row are divided into the area being mutually isolated, it will be in same redundant columns There is the region of connection measure (such as hole) that the sprawling path in water logging source is combined to be merged into a subregion on boundary, if nothing, for list Only subregion；
The non-safety-related region interconnected 14c) is included in safety-related region as possible；
14d) exterior wall of workshop, ground and roof be water logging partition boundaries, wherein between safety-related workshop or with non-peace The wall of total correlation workshop intersection is set as watertight wall；
14e) setting watertight measure ensures that underground water will not have an impact safety-related workshop, while active area produces Raw inside water logging does not penetrate into underground water；
14f) set the wall between active area and cold area to watertight wall；
14g) safety critical area such as master control chamber region, spentnuclear fuel loading and unloading region needs and other regional water use Mi Qiang (or floor) separates；
Region (such as water chiller of HVAC system, main feed water pipe line, master that a large amount of water generate 14h) are had when internal water logging Steam pipe line) need security-related regional water use Mi Qiang to separate；
14i) water that internal water logging generates flow to lowermost layer inside workshop eventually by escalator and staircase.
Specifically, the water logging water level computing module 2 calculates water logging water level by the following method：
H=Q/A
Wherein：H is water logging water level；
Q is water logging total flow；
A is net floor area.
In the present embodiment, when calculating the water level in each region, it should not consider draining and other protection facilities In the case of conservatively calculate highest be expected water level, wherein net floor area refer in the region in removing equipment base, structure wall Occupied floor area, for the room in big tank body room or the intensive arrangement of equipment, net floor area is total floor area 50%；For corridor and staircase, net floor area is the 90% of total floor area；For other rooms, net floor area is The 70% of total floor area.
Specifically, when water logging source is tank body, water logging total flow Q is tank body total measurement (volume)；When water logging source is other types, The computational methods of water logging total flow Q are：
Q=qST
Wherein：Q is pipe flow speed at cut；
S is Break size；
T is the pipeline leakage time.
Specifically following principle is deferred to when calculating water logging water level：
2a) for high energy pipeline, it is assumed that high energy pipeline cut is critical two phase flow under normal system pressure；It is being normally Under pressure of uniting, middle energy pipeline cut is non-critical fluid.
2b) assume that there are maximum flow of water rate and volume in water logging source.For example, it is assumed that the pipeline breaking mode of water logging may be caused For double-ended guillotine break；Assuming that expansion joint and bend connector are of serious failure, it is assumed that have 4 in the circulation in steam turbine workshop A expansion joint；Catastrophic break has occurred in water tank, valve and pump.
After 2c) identifying water logging, need to examine peripheral region to determine possibility that water logging is stretched to other regions Property.When considering to stretch, need to identify and check skylight, staircase, crack between a door and its frame etc..If it find that stretching to other regions Water may cause water logging event, then to examine the region by calculating greatest expected water level.
It 2d) is flowed to outside staircase with respect to crack between a door and its frame, in staircase or flows into the preferential continuation of water of staircase along stair Between toward flow down.
Door 2e) is assumed still completely and in normal position, for example, the door often closed is still pass, unless by power plant people Member opens.But fire resistant doorsets are not water-stops.
2f) assume that wall can resist highest and be expected water level, therefore, in entire water logging event, it is assumed that wall is complete.
Do not consider that the operation of sump pump can alleviate water logging consequence 2g).
It is 2h) hydrophobic for ground, it is assumed that have a check-valves, the measures such as reverse current protection and Siphon gate prevent to flow backwards and appoint What possible water logging.
2i) assume that less than two fire hydrants of flow rate caused by the rupture between fire-fighting system pipeline and fire hydrant rupture Caused flow rate.
As shown in Figure 1, the water logging subregion is determining and optimization module 3 further includes：Evaluation module 31 is influenced, the water is connected Waterflooding position computing module 2, the water logging water level for being calculated according to water logging water level computing module 2 evaluate water logging water level to respective partition The influence of interior important equipment；Evaluation module 32 again connect the influence evaluation module 31 and connect, and are commented for working as the influence When valence module 31 judges that highest water logging water level influences important equipment, consider to count again in the case of with sump pump, pumping equipment Ideal water logging water level is calculated, influence of the ideal water logging water level to the important equipment in respective partition is evaluated；Determine division module 33, with The influence evaluation module 31, the evaluation module again 32 and the water logging identifing source module 12 are connected, for working as institute Stating, which influences evaluation module 31, judges that highest water logging water level does not influence important equipment or the evaluation module again 32 judges ideal When water logging water level does not influence important equipment, determine that the water logging subregion of the subregion divides；Optimize division module 34, is commented again with described Valence module 32 and the water logging water level computing module 2 are connected, for judging ideal water logging when the evaluation module 32 again When water level influences important equipment, water logging subregion or the corresponding safeguard procedures of supplement are optimized and revised.Specifically, evaluation module 31 is influenced Influence of the evaluation water logging water level to the important equipment in respective partition or again evaluation module 32 in the ideal water logging water of evaluation Position in respective partition to when the influence of important equipment, mainly considering following principle：
If 3a) safety-related structures, system and component do not have safe shutdown function or when their fail safes stop Heap function has been completed, then their failure is acceptable.
If the position that equipment 3b) in region is placed is higher than possible water level, and the component in the region will not be by Water injection or water clock damage or it is identified be amenable to maximum waterflooding water level, then water logging does not interfere with this region.
If 3c) highest, which is expected water level, important equipment, water logging not to interfere with the region in threatening area.
3d) failure of equipment may be not merely due to being submerged, it is also possible to due to making moist (for example, square tube in equipment Injection, splashing or the water clock of the water in road).It determines whether to be located on peak level according to the peak level in each region and but may be used The equipment that can be failed due to the water for spraying or splashing.For this analysis, conservatively it is assumed to be：In addition to capped and/or close Envelope and outside the insulated cable of waterproof, pump or valve driving machine, it is assumed that spray or the water that is splashed in equipment enter equipment can cause to set Standby failure.Equipment qualification file can provide the information in terms of equipment water resistance.If equipment is according to water logging source 3m (any sides Position), and centre assumes that the fluid from cut or crack can soak neighbouring equipment without any barrier then guarding.High energy pipe The steam that road releases can soak neighbouring equipment.
3e) for being sprayed or the electrical equipment of water logging, such as Motor Control Center, electrical cabinet and termination rack, it is contemplated that influence Be short circuit and cannot work.Consider that the failure mode of this kind of electrical equipment is ground short circuit in analysis.But do not consider water logging pair The influence of power or instrument cable itself.
3f) pneumatic defective valve caused by water logging causes valve to be in power failure state.
3g) motor-driven valve needs electric current to change valve state.There is no power supply, valve that will keep current state.Therefore electricity Dynamic valve will cause failsafe valve by water logging and/or injection and be maintained at original state.Independent point has been carried out to each valve Analysis is how to influence power plant to run to determine them.
3h) for passive component, such as check-valves, pipeline and water tank, influence of the water logging to them is not considered.
3i) water logging is influenced on testing and repairing degree of unavailability not.Additional experiment and repair may be needed after water logging. Before water logging and in watering-out process, the equipment degree of unavailability caused by testing and repairing will not be influenced by water logging.
Circuit failure protection 3j) has been devised, has been power plant by protective relay, circuit-breaker and fuse Circuit provides protection.Electrical distribution system is devised, is safety protective circuit (the safety-related sum in AC and DC system Non-safety-related) offer protective device appropriate.The electrical distribution equipment that is designed as of protective device provides sufficient protection To prevent electric fault and circuit overload condition.Therefore, the component failure caused by water logging will not cause to impacted The busbar failure of component power supply.
Specifically, when the influence evaluation module 31 judges that highest water logging water level influences important equipment, consider there is ground Ideal water logging water level is calculated in the case of hole pump, pumping equipment again, the computational methods of the ideal water logging water level are：
h1=(Q-B)/A
Wherein：h1For ideal water logging water level；
Q is water logging total flow；
B is the drain discharge of sump pump, pumping equipment；
A is net floor area.
It is identical when wherein water logging total flow Q, net floor area A are with the water logging water level computing module 2 calculating water logging water level.
Determine that water logging and spray behavior can counterweights according to the interpretational criteria of functional analysis by the water logging position of institute's analyzed area When wanting equipment and system to execute and safe shutdown function being maintained to have an impact, it must just consider that adjustment water logging subregion or supplement are corresponding Safeguard procedures should preferentially use passive method under equivalent protection level.The safeguard procedures of supplement should be with other design criterias Mutually coordinate with limitation, such as fire prevention, security personnel, repair, cannot such as coordinate, then needs to consider the design of change system.Optimize division module 34 in highest water logging position influence important equipment, optimizes and revises water logging subregion or the corresponding safeguard procedures of supplement generally comprise：
34a) reasonable Arrangement pipeline should not install other pipelines needed for equipment operation in room in room.
It 34b) should preferentially realize fluid system, store water tank and need being physically isolated between safeguard.
34c) position where electrical equipment should be higher than and contain fluid system region as possible.
34d) water resistant is selected to flood equipment as far as possible.
34e) watertightness lining is arranged in tank body surrounding.
34f) need the equipment room protected that should provide leak detection and isolating device, leak detection (such as temperature certain Indicated with humidity, radioactivity and water level) instruction of " pipeline or equipment have broken down " can be provided to operating personnel.
Level detection instrument must 34g) be set in the melt pit of workshop to be detected to high water level.These level sensors Alarm should be generated in master control room, to remind operator that there are potential water loggings.
Threshold/overfall 34h) is set, and on the one hand purpose is to prevent the water of outside from entering room, on the other hand can then rise To the effect for improving liquid level sensor leak detection validity.
If 34i) device location that need to be protected be less than maximum water logging water level and it is identified cannot be run in water logging, The flood preventing measure for improving equipment mounting height can then be taken.It should make to be located on water logging water level fence below or barrier wall Penetration piece number minimize.
Embodiment two
Fig. 2 is referred to, second embodiment of the present invention provides a kind of water logging subregion division methods of nuclear power plant, feature exists In including the following steps:
S1, according to water logging source in nuclear power plant region and important equipment distribution situation, water logging subregion is tentatively carried out to the region Division；
Water logging water level in S2, each water logging subregion of calculating；
S3, the influence according to water logging water level to the important equipment in corresponding subregion determine existing subregion or optimize and revise Water logging subregion.
Embodiment three
In 3rd embodiment provided by the invention, as shown in figure 3, the step S1 further includes：
S11, by the civil engineering structure of nuclear island factory building, room layout, system deployment scenarios, by workshop by floor height by system execution Function different demarcation be mutual independent function division；
There is the water logging source for being likely to result in water logging effect in S12, identification room or area；
S13, system and equipment important in region are determined；
Water logging subregion inside S14, Preliminary division.
In the present embodiment, the water logging source in the step S12 includes aqueduct rupture, pump mechanical sealing failure, storage Water tank rupture, fire-fighting system triggering and the fluid from floor above and adjacent domain.For the above water logging source according to following Criterion is analyzed：
S12a) for high energy pipeline, it is assumed that circumferential rupture occurs；For middle energy pipeline, it is assumed that there are through-wall crack.Cut Assume to be equal to the pipe thickness of 1/2 internal diameter of the pipeline × 1/2 in region.
S12b) for main water supply and main steam pipe, it is assumed that there are the cut of a 0.1m2.Containment building annular is empty Interior main steam or water-supply line is not required to assume can there is cut because there is the presence of casing.
S12c) pipeline cut is assumed only to occur during normal operation, for only during non-100% Power operation of power plant The part high energy piping of pressure-bearing should assume cut by most serious situation.
S12d) assume that pipeline of the nominal diameter less than or equal to 25mm will not rupture.
S12e when) some water tank ruptures, it is assumed that the water loading amount of entire babinet is all discharged.
S12f) compartment water logging source should not necessarily be limited by the system in compartment, also should include the water logging source outside compartment.External water logging Source includes that ground is hydrophobic and the hydrophobic reflux of equipment, hydrophobic, or the water through being damaged structures in other regions (such as under door) It flows (collapsing for such as floor).
S12g) bellows and expansion joint of circulation must assume that single bellows or expansion joint are entirely ineffective.
S12h water logging must assume that all fire-fighting systems are all transported in considered region caused by) being acted by fire-fighting system Row.The result that action may be caused by natural fire event, maloperation or heat source (such as steam pipe line cut) generates.However, making It can be ignored with the malfunction of the dry type fire extinguishing system of closed nozzle.
S12i) for seismic events, it must assume any single (I class of non-antidetonation and without pressure without aseismic analysis Boundary integrity aseismic analysis) thrashing.Pipeline circumferential direction, which is broken, to be assumed for high energy systems, middle energy system must be assumed Through-wall crack.Each compartment must select the break location of consequence most serious.
S12j) there are redundancy vacuum demolition set and overpressure protection, or have the I class tank (case) of antidetonation of the opening communicated with air It is assumed that will not fail.I class tank (case) of antidetonation and I class tank (case) of non-antidetonation without these devices must assume the water of entire babinet Loading amount is all discharged..
S12k the possibility for causing water logging by system mismatch) must be considered in water logging evaluation.System mismatch may be by program Or the mistake of operator causes, or drain by inappropriate isolation of system or before repair and cause, or drawn by the mistake operation of equipment It rises.
S12l) water logging volume is considered as secondary water logging source in compartment.Such as：The cut of power station heat supply pipeline causes fire-fighting to be sprayed The malfunction of leaching system；Pipeline whipping or the failure that other fluid systems may be caused from the injection of imaginary cut.
S12m) since the total Water of demineralized water and hot-water heating system is limited, it is assumed that the two systems are not in steam turbine workshop Important water logging source.
Specifically, system and equipment important in the step S13 include that internal water logging causes its failure that can influence power plant The system and equipment that safe shutdown or water logging event are alleviated, the system that the safe shutdown requires be whether had according to system under It arranges for maintaining the function of safe shutdown and determination：
S13a enough negative reactivities) are introduced, reactor is maintained into subcritical state；
S13b the water level in reactor pressure vessel) is maintained into acceptable level, guarantee can take clad temperature liter out of The heat that height generates is to prevent fuel can from failing；
S13c) prevent reactor pressure vessel pressure from exceeding security restriction；
S13d) discharge waste heat is to reach and maintain shutdown state, fuel is prevented to damage and containment pressure limit exists Under design value；
S13e enough process monitorings) are provided to executing and controlling safe shutdown function；
S13f) operation for the equipment for safe shutdown provides support function.
Specifically, mainly the water that internal water logging generates is led to by the way of white-out in terms of flood preventing due to nuclear power plant The approach such as lower gap or floor drain of moving into one's husband's household upon marriage give off safety critical area (the nuclear power plant's large break occurred after major accident in containment Except loss of-coolant accident (LOCA)), therefore step S14 mainly follows following principle：
S14a it) is based on existing mill construction and divides partition boundaries, nuclear island factory building is known by the function that system in region executes Not Wei mutually independent function division, the function division include electric meter region, mechanical equipment region, ventilation equipment area, Three wastes system area, master control region and personnel channel area.
S14b) in same function division, Safety Redundancy row are divided into the area being mutually isolated, it will be in same redundant columns There is the region of connection measure (such as hole) that the sprawling path in water logging source is combined to be merged into a subregion on boundary, if nothing, for list Only subregion；
S14c the non-safety-related region interconnected) is included in safety-related region as possible；
S14d) exterior wall of workshop, ground and roof be water logging partition boundaries, wherein between safety-related workshop or with non-peace The wall of total correlation workshop intersection is set as watertight wall；
S14e) setting watertight measure ensures that underground water will not have an impact safety-related workshop, while active area The inside water logging of generation does not penetrate into underground water；
S14f) wall between active area and cold area is set to watertight wall；
S14g) safety critical area such as master control chamber region, spentnuclear fuel loading and unloading region needs and other regional water use Mi Qiang (or floor) separates；
S14h) had when internal water logging region that a large amount of water generate (such as the water chiller of HVAC system, main feed water pipe line, Main steam pipe) need security-related regional water use Mi Qiang to separate；
S14i) water that internal water logging generates flow to lowermost layer inside workshop eventually by escalator and staircase.
Specifically, the water logging water level computing module 2 calculates water logging water level by the following method：
H=Q/A
Wherein：H is water logging water level；
Q is water logging total flow；
A is net floor area.
In the present embodiment, when calculating the water level in each region, it should not consider draining and other protection facilities In the case of conservatively calculate highest be expected water level, wherein net floor area refer in the region in removing equipment base, structure wall Occupied floor area, for the room in big tank body room or the intensive arrangement of equipment, net floor area is total floor area 50%；For corridor and staircase, net floor area is the 90% of total floor area；For other rooms, net floor area is The 70% of total floor area.
Specifically, when water logging source is tank body, water logging total flow Q is tank body total measurement (volume)；When water logging source is other types, The computational methods of water logging total flow Q are：
Q=qST
Wherein：Q is pipe flow speed at cut；
S is Break size；
T is the pipeline leakage time.
Specifically following principle is deferred to when calculating water logging water level：In the present embodiment, calculate the water level in each region when It waits, it should conservatively calculate highest in the case where not considering draining and other protection facilities and be expected water level, and consider stream The factors such as the net floor area (i.e. the gross area subtracts the area shared by pump seat and anti-flood wall) of the total flow and the region that enter, compartment Net free space by compartment volume 70% calculate, if having in it large scale equipment such as storage tank etc. be contemplated that by 50% calculate, Expected maximum waterflooding water level should be determined by calculating the net free space of considered compartment.If considering discharge, it may be determined that the region Water logging water level under net flow.
Specifically following principle is deferred to when calculating：
S2a) for high energy pipeline, it is assumed that high energy pipeline cut is critical two phase flow under normal system pressure；Normal Under system pressure, middle energy pipeline cut is non-critical fluid.
S2b) assume that there are maximum flow of water rate and volume in water logging source.For example, it is assumed that the pipeline breaking side of water logging may be caused Formula is double-ended guillotine break；Assuming that expansion joint and bend connector are of serious failure, it is assumed that in the circulation in steam turbine workshop There are 4 expansion joints；Catastrophic break has occurred in water tank, valve and pump.
S2c it after) identifying water logging, needs to examine peripheral region to determine possibility that water logging is stretched to other regions Property.When considering to stretch, need to identify and check skylight, staircase, crack between a door and its frame etc..If it find that stretching to other regions Water may cause water logging event, then to examine the region by calculating greatest expected water level.
S2d it) is flowed to outside staircase with respect to crack between a door and its frame, in staircase or flows into the preferential continuation of water of staircase along stair Between toward flow down.
S2e door) is assumed still completely and in normal position, for example, the door often closed is still pass, unless by power plant people Member opens.But fire resistant doorsets are not water-stops.
S2f) assume that wall can resist highest and be expected water level, therefore, in entire water logging event, it is assumed that wall is complete.
S2g) do not consider that the operation of sump pump can alleviate water logging consequence.
S2h) hydrophobic for ground, it is assumed that have a check-valves, the measures such as reverse current protection and Siphon gate preventing to flow backwards and Any possible water logging.
S2i) assume that less than two fire hydrants of flow rate caused by the rupture between fire-fighting system pipeline and fire hydrant are broken Split caused flow rate.
As shown in figure 3, the step S3 further includes：
S31, influence of the evaluation water logging water level to the important equipment in respective partition, if highest water logging position do not influence it is important Equipment carries out step S33, if highest water logging position influence important equipment, carries out step S32；
S32, it calculates ideal water logging water level again in the case where considering with sump pump, pumping equipment, evaluates ideal water Influence of the waterflooding position to the important equipment in respective partition carries out step if ideal water logging water level does not influence important equipment S33 carries out step S34 if ideal water logging water level influences important equipment；
S33, determine that the water logging subregion of the subregion divides, repeating said steps S12 proceeds by the water logging in next region Subregion divides；
S34, water logging subregion or the corresponding safeguard procedures of supplement are optimized and revised, then repeats to proceed by subsequently from step S2 Step, until evaluation highest water logging position does not influence to evaluate ideal water in important equipment or the step S32 in the step S31 When waterflooding position does not influence important equipment, then carry out step S33.
Specifically, step S31 exists in influence or step S32 of the evaluation water logging water level to the important equipment in respective partition The ideal water logging water level of evaluation in respective partition to when the influence of important equipment, mainly considering following principle：
S3a) if safety-related structures, system and component do not have safe shutdown function or when their fail safes stop Heap function has been completed, then their failure is acceptable.
S3b) if the position that equipment in region is placed is higher than possible water level, and the component in the region will not be by Water injection or water clock damage or it is identified be amenable to maximum waterflooding water level, then water logging does not interfere with this region.
S3c) if highest, which is expected water level, important equipment, water logging not to interfere with the region in threatening area.
S3d) failure of equipment may be not merely due to being submerged, it is also possible to due to making moist (for example, square tube in equipment Injection, splashing or the water clock of the water in road).It determines whether to be located on peak level according to the peak level in each region and but may be used The equipment that can be failed due to the water for spraying or splashing.For this analysis, conservatively it is assumed to be：In addition to capped and/or close Envelope and outside the insulated cable of waterproof, pump or valve driving machine, it is assumed that spray or the water that is splashed in equipment enter equipment can cause to set Standby failure.Equipment qualification file can provide the information in terms of equipment water resistance.If equipment is according to water logging source 3m (any sides Position), and centre assumes that the fluid from cut or crack can soak neighbouring equipment without any barrier then guarding.High energy pipe The steam that road releases can soak neighbouring equipment.
S3e) for being sprayed or the electrical equipment of water logging, such as Motor Control Center, electrical cabinet and termination rack, it is contemplated that influence Be short circuit and cannot work.Consider that the failure mode of this kind of electrical equipment is ground short circuit in analysis.But do not consider water logging pair The influence of power or instrument cable itself.
S3f) pneumatic defective valve caused by water logging causes valve to be in power failure state.
S3g) motor-driven valve needs electric current to change valve state.There is no power supply, valve that will keep current state.Therefore electricity Dynamic valve will cause failsafe valve by water logging and/or injection and be maintained at original state.Independent point has been carried out to each valve Analysis is how to influence power plant to run to determine them.
S3h) for passive component, such as check-valves, pipeline and water tank, influence of the water logging to them is not considered.
S3i) water logging is influenced on testing and repairing degree of unavailability not.Additional experiment and dimension may be needed after water logging It repaiies.Before water logging and in watering-out process, the equipment degree of unavailability caused by testing and repairing will not be influenced by water logging.
S3j circuit failure protection) has been devised, has been electricity by protective relay, circuit-breaker and fuse Factory's circuit provides protection.Electrical distribution system is devised, is that the safety protective circuit in AC and DC system is (safety-related With non-safety-related) offer protective device appropriate.The electrical distribution equipment that is designed as of protective device provides sufficient guarantor Shield is to prevent electric fault and circuit overload condition.Therefore, the component failure caused by water logging will not cause to impacted Component power supply busbar failure.
Specifically, when the step S31 judges that highest water logging water level influences important equipment, consider with sump pump, row Calculate ideal water logging water level in the case of drainage facility again, the computational methods of ideal water logging water level are in the step S32：
h1=(Q-B)/A
Wherein：h1For ideal water logging water level；
Q is water logging total flow；
B is the drain discharge of sump pump, pumping equipment；
A is net floor area.
It is identical when wherein water logging total flow Q, net floor area A are with the water logging water level computing module 2 calculating water logging water level.
Determine that water logging and spray behavior can counterweights according to the interpretational criteria of functional analysis by the water logging position of institute's analyzed area When wanting equipment and system to execute and safe shutdown function being maintained to have an impact, it must just consider that adjustment water logging subregion or supplement are corresponding Safeguard procedures should preferentially use passive method under equivalent protection level.The safeguard procedures of supplement should be with other design criterias Mutually coordinate with limitation, such as fire prevention, security personnel, repair, cannot such as coordinate, then needs to consider the design of change system.When highest water logging position When influencing important equipment, water logging subregion is optimized and revised in step S34 or the corresponding safeguard procedures of supplement generally comprise：
S34a) reasonable Arrangement pipeline should not install other pipelines needed for equipment operation in room in room.
S34b it) should preferentially realize fluid system, store water tank and need being physically isolated between safeguard.
S34c) position where electrical equipment should be higher than and contain fluid system region as possible.
S34d) water resistant is selected to flood equipment as far as possible.
S34e) watertightness lining is arranged in tank body surrounding.
S34f) need the equipment room protected that should provide leak detection and isolating device, leak detection (such as temperature certain Indicated with humidity, radioactivity and water level) instruction of " pipeline or equipment have broken down " can be provided to operating personnel.
S34g) level detection instrument must be set in the melt pit of workshop to be detected to high water level.These level detections Device should generate alarm in master control room, to remind operator that there are potential water loggings.
S34h) threshold/overfall is set, on the one hand purpose is to prevent the water of outside from entering room, on the other hand then may be used Play the role of improving liquid level sensor leak detection validity.
S34i) if the device location that need to be protected is less than maximum water logging water level and identified cannot be transported in water logging Row can then take the flood preventing measure for improving equipment mounting height.It should make to be located at water logging water level fence below or barrier Penetration piece number on wall minimize.
Example IV
The water logging subregion division methods that the present embodiment provides embodiment three apply the fire compartment in Mr. Yu nuclear power plant room.
Fig. 4 show the signal using certain region in Mr. Yu nuclear power plant room by the division methods of the water logging subregion of the present invention Figure.Include important areas between master control room, main steam isolation valve and between electrical penetration etc. in the region.In conjunction with Fig. 2, Fig. 3 and Shown in Fig. 4, a kind of water logging subregion division methods of nuclear power workshop fire compartment are present embodiments provided, including：
S1, according to water logging source in fire compartment and important equipment distribution situation, water logging subregion is tentatively carried out to the region It divides；
Water logging water level in S2, calculating water logging subregion；
S3, the influence according to water logging water level to the important equipment in fire compartment determine existing subregion or optimize and revise water Flood subregion.
Specifically, the step S1 further includes：
S11, by the civil engineering structure of nuclear island factory building, room layout, system deployment scenarios, by workshop by floor height by system execution Function different demarcation be mutual independent function division；
There is the water logging source for being likely to result in water logging effect in S12, identification room or area；
Water logging identifing source principle in three in conjunction with the embodiments, in the present embodiment, the nuclear power workshop fire compartment it is potential Water logging source is a hose station in staircase, and the fire hydrant is executable to master control room and electrical in action The fire-fighting action in penetration piece region.There is domestic water in master control room, these pipelines are smaller than equal to DN25, therefore are not examined Consider these pipeline failures and forms water logging source.The pipeline breaking for considering to will appear 0.1m2 sizes is guarded between main steam isolation valve or is let out Leakage forms water logging source.The pipeline of relevant water system system in heating and ventilating equipment considers to become water logging source.
S13, system and equipment important in region are determined；
The important system in three and equipment identify principle in conjunction with the embodiments, and important system and equipment are respectively distributed in the area Area between area and heating and ventilating equipment between 1E grades of electrical penetration areas, master control room and main steam isolation valves.
Water logging subregion inside S14, Preliminary division.
The region is functionally divided first, is master control chamber region, 1E grades and non-1E through analyzing the region division Grade electrical penetration area, mechanical equipment area include between main steam isolation valve area and heating and ventilating equipment, to be respectively contained in each functional areas Different safe shutdown equipment is set to water logging partition boundaries between functional areas.Master control chamber region is safety critical area, is divided into Individual water logging subregion, boundary (wall for including floor, ceiling, surrounding) is set as watertight wall.
Together with the non-1E grades of non-security regions interconnected and 1E grades of regions are drawn, the water logging source in the region is the fire that disappears Bolt, it is contemplated that fire hydrant carries out coverage area when fire-fighting, therefore two reactor shutdown breaker chambers are also included in 1E grades of areas Domain, wall that whole region and radiation control zone have a common boundary, the workshop exterior wall having a common boundary with other non-safety-related workshops and it is remaining with Safety-related or non-safety-related region intersection wall or floor are set to watertight wall.
It is isolated between intermediate heating and ventilating equipment from arrangement between two main steam isolation valves, is also arranged without connection from structure It applies, therefore these three region divisions are individual water logging subregion, boundary requires to calculate by water logging position and determine.
The water logging water level computational methods of step S2 described in three in conjunction with the embodiments, in the present embodiment, the water logging of master control room Fire hose from fire hydrant.When a rotary hose brings master control room into from east corridor entrance, due to open door to Outer draining, will not apparent ponding in room.East corridor entrance door is equipped with threshold, with the same absolute altitude of floor.The water in this region It will be across the porous entrance door increased floor and flow back into east.There are one the floor drain often closed in master control room, can open manually Water to drain into the on-radiation control zone melt pit of the 1st layer of auxiliary plant, therefore in the region or water is occurring for close region It will not cause to generate ponding in one's respective area when flooding event.
When non-1E grades and 1E grade are electrically through area due to fire hydrant progress fire-fighting action, the water of generation passes through floor drain, stair Between and elevator to the 1st laminar flow, the accumulation of water can be prevented.
After cut occurs for energy water-system pipeline in correlation in heating and ventilating equipment, the flow flowed out from floor drain and door is considered, In conjunction with the net free space in the region, the maximum water logging water level being computed in the region is 101.6mm.
When occurring pipeline breaking or leakage in main steam isolation valve, in conjunction with the net free space in the region, main steam Maximum water logging water level between isolating valve is about 914.4mm.
Specifically, the step S3 further includes：
S31, influence of the evaluation water logging water level to the important equipment in respective partition, if highest water logging position do not influence it is important Equipment carries out step S33, if highest water logging position influence important equipment, carries out step S32；
S32, it calculates ideal water logging water level again in the case where considering with sump pump, pumping equipment, evaluates ideal water Influence of the waterflooding position to the important equipment in respective partition carries out step if ideal water logging water level does not influence important equipment S33 carries out step S34 if ideal water logging water level influences important equipment；
S33, determine that the water logging subregion of the subregion divides, repeating said steps S12 proceeds by the water logging in next region Subregion divides；
S34, water logging subregion or the corresponding safeguard procedures of supplement are optimized and revised, then repeats to proceed by subsequently from step S2 Step, until evaluation highest water logging position does not influence to evaluate ideal water in important equipment or the step S32 in the step S31 When waterflooding position does not influence important equipment, then carry out step S33.
In the present embodiment, since master control chamber region and non-1E grades and 1E grades not will produce through area electrically in step S31 Apparent ponding, therefore the water logging event that the two regions occur will not have an impact safe shutdown function.It is held in heating and ventilating equipment The containment isolating valve of row safe shutdown function is through verifying on the maximum water logging water logging in this area.Between main steam isolation valve The interior isolating valve for executing safe shutdown function is prevented through verifying on the maximum water logging water logging in this area in the present embodiment The water logging subregion of fiery subregion is divided meets safety requirements through analysis, therefore need not optimize, and carries out step S33 in next step, really The water logging subregion for determining the subregion divides.
In conclusion application scheme at least has following advantageous effects compared with the existing technology：
1) comprehensive water logging subregion has been carried out in conjunction with water logging source, existing structure and connection situation；
2) whether received according to result that supplement safeguard procedures can be taken by the important equipment of identification, after evaluation, to It is effectively isolated the equipment and component of the different safety series for executing same security function；
3) it by the water logging subregion of division and its optimization, avoids causing to execute the difference of some security function with a water logging Serial equipment generates common mode failure.
As described above, above-mentioned nuclear power plant's water logging subregion dividing system is drawn for implementing above-mentioned nuclear power plant's water logging subregion Divide method, so, the embodiment of the system is identical as one or more embodiments of the above method, herein just no longer one by one It repeats.
It is above disclosed to be only a preferred embodiment of the present invention, the power of the present invention cannot be limited with this certainly Sharp range, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and is weighed according to the present invention Equivalent variations made by profit requirement, still belong to the scope covered by the invention.

Claims (16)

1. a kind of water logging subregion dividing system of nuclear power plant, which is characterized in that including：
Water logging subregion Preliminary division module (1) is used for according to water logging source in nuclear power plant region and important equipment distribution situation, by factory Room is mutual independent function division by the function different demarcation that system executes by floor height, is likely to result in identification function subregion The water logging source of water logging effect simultaneously determines important system and equipment, tentatively to carry out the division of water logging subregion to the region；
Water logging water level computing module (2) is connect with the water logging subregion Preliminary division module (1), for calculating each water logging point Water logging water level in area；
The determination of water logging subregion and optimization module (3), connect with the water logging water level computing module (2), for according to water logging water level Influence to the important equipment in corresponding subregion determines existing subregion or optimizes and revises water logging subregion.
2. the water logging subregion dividing system of nuclear power plant according to claim 1, which is characterized in that the water logging subregion is preliminary Division module (1) includes：
Function zoning sub-module (11), for the civil engineering structure, room layout, system deployment scenarios by nuclear island factory building, by workshop It is mutual independent function division to press the function different demarcation that system executes by floor height；
Water logging identifing source module (12) is connected with the function zoning sub-module (11), and existing in room or area for identification can It can cause the water logging source of water logging effect；
Important system and equipment identification module (13) are connected with the water logging identifing source module (12), for determining weight in region The system and equipment wanted；
Water logging subregion division module (14) is connected with the important system and equipment identification module (13), in Preliminary division Portion's water logging subregion.
3. the water logging subregion dividing system of nuclear power plant according to claim 1, which is characterized in that the water logging water level calculates Module (2) calculates water logging water level by the following method：
H=Q/A
Wherein：H is water logging water level；
Q is water logging total flow；
A is net floor area.
4. the water logging subregion dividing system of nuclear power plant according to claim 3, which is characterized in that when water logging source is tank body When, water logging total flow Q is tank body total measurement (volume)；When water logging source is other types, the computational methods of water logging total flow Q are：
Q=qST
Wherein：Q is pipe flow speed at cut；
S is Break size；
T is the pipeline leakage time.
5. the water logging subregion dividing system of nuclear power plant according to claim 1, which is characterized in that the water logging subregion determines And optimization module (3) further includes：
Evaluation module (31) is influenced, the water logging water level computing module (2) is connected, for evaluating water logging water level in respective partition Important equipment influence；
Evaluation module (32) again connect influence evaluation module (31) connection, for working as the influence evaluation module (31) When judging that highest water logging water level influences important equipment, ideal water is calculated in the case of considering with sump pump, pumping equipment again Influence of the ideal water logging water level to the important equipment in respective partition is evaluated in waterflooding position；
Division module (33) is determined, with the influence evaluation module (31), the evaluation module again (32) and the water logging Identifing source module (12) is connected, for judging that highest water logging water level does not influence important equipment when the influence evaluation module (31) Or the evaluation module again (32) determines the water logging subregion of the subregion when judging that ideal water logging water level does not influence important equipment It divides；
Optimize division module (34), be connected with the evaluation module again (32) and the water logging water level computing module (2), For when the evaluation module (32) again judges that ideal water logging water level influences important equipment, optimizing and revising water logging subregion or benefit Fill corresponding safeguard procedures.
6. the water logging subregion dividing system of nuclear power plant according to claim 2, which is characterized in that the water logging source includes defeated Waterpipe rupture, pump mechanical sealing failure, water tank rupture, fire-fighting system triggering and from floor above and adjacent domain Fluid.
7. the water logging subregion dividing system of nuclear power plant according to claim 2, which is characterized in that the important system and Equipment includes the system and equipment that internal water logging causes that its failure can influence the safe shutdown of power plant or water logging event is alleviated, the peace Whether the system that full cut-off heap requires is that have the function of following being used to maintain safe shutdown and determination according to system：It introduces enough Reactor is maintained subcritical state by negative reactivity；Water level in reactor pressure vessel is maintained into acceptable water Flat, clad temperature can be taken out of by, which ensureing, increases the heat generated to prevent fuel can from failing；Prevent reactor pressure vessel pressure Beyond security restriction；Discharge waste heat is to reach and maintain shutdown state, fuel is prevented to damage and containment pressure limit exists Under design value；Enough process monitorings are provided to executing and controlling the safe shutdown function；To be used for the safe shutdown Equipment operation provide support function.
8. the water logging subregion dividing system of nuclear power plant according to claim 5, which is characterized in that the ideal water logging water level Computational methods be：
h1=(Q-B)/A
Wherein：h1For ideal water logging water level；
Q is water logging total flow；
B is the drain discharge of sump pump, pumping equipment；
A is net floor area.
9. a kind of water logging subregion division methods of nuclear power plant, which is characterized in that include the following steps:
S1, according to water logging source in nuclear power plant region and important equipment distribution situation, workshop is pressed into the function that system executes by floor height Different demarcation is mutual independent function division, and the water logging source of water logging effect is likely to result in identification function subregion and determines weight System and equipment are wanted, tentatively to carry out the division of water logging subregion to the region；
Water logging water level in S2, each water logging subregion of calculating；
S3, the influence according to water logging water level to the important equipment in corresponding subregion determine existing subregion or optimize and revise water logging Subregion.
10. the water logging subregion division methods of nuclear power plant according to claim 9, which is characterized in that the step S1 is also wrapped It includes：
S11, by the civil engineering structure of nuclear island factory building, room layout, system deployment scenarios, workshop is pressed into the work(that system executes by floor height Energy different demarcation is mutual independent function division；
There is the water logging source for being likely to result in water logging effect in S12, identification room or area；
S13, system and equipment important in region are determined；
Water logging subregion inside S14, Preliminary division.
11. the water logging subregion division methods of nuclear power plant according to claim 9, which is characterized in that lead in the step S2 It crosses following method and calculates water logging water level：
H=Q/A
Wherein：H is water logging water level；
Q is water logging total flow；
A is net floor area.
12. the water logging subregion division methods of nuclear power plant according to claim 11, which is characterized in that when water logging source is tank body When, water logging total flow Q is tank body total measurement (volume)；When water logging source is other types, the computational methods of water logging total flow Q are：
Q=qST
Wherein：Q is pipe flow speed at cut；
S is Break size；
T is the pipeline leakage time.
13. the water logging subregion division methods of nuclear power plant according to claim 9, which is characterized in that the step S3 is also wrapped It includes：
The influence of S31, evaluation water logging water level to the important equipment in respective partition, if highest water logging position does not influence important set It is standby, step S33 is carried out, if highest water logging position influence important equipment, carries out step S32；
S32, it calculates ideal water logging water level again in the case where considering with sump pump, pumping equipment, evaluates ideal water logging water Influence of the position to the important equipment in respective partition carries out step S33, such as if ideal water logging water level does not influence important equipment Fruit ideal water logging water level influences important equipment, carries out step S34；
S33, determine that the water logging subregion of the subregion divides, repeating said steps S12 proceeds by the water logging subregion in next region It divides；
S34, water logging subregion or the corresponding safeguard procedures of supplement are optimized and revised, then repeats to proceed by follow-up step from step S2 Suddenly, until evaluation highest water logging position does not influence to evaluate ideal water logging in important equipment or the step S32 in the step S31 When water level does not influence important equipment, then carry out step S33.
14. the water logging subregion division methods of nuclear power plant according to claim 10, which is characterized in that in the step S11 The water logging source includes aqueduct rupture, pump mechanical sealing failure, water tank rupture, fire-fighting system triggering and comes from above The fluid of floor and adjacent domain.
15. the water logging subregion division methods of nuclear power plant according to claim 10, which is characterized in that in the step S12 Important system and equipment includes the system that internal water logging causes that its failure can influence the safe shutdown of power plant or water logging event is alleviated And whether equipment, the system that the safe shutdown requires are that had the function of following being used to maintain safe shutdown and true according to system Fixed：It introduces enough negative reactivities and reactor is maintained into subcritical state；Water level in reactor pressure vessel is maintained In acceptable level, clad temperature can be taken out of by, which ensureing, increases the heat generated to prevent fuel can from failing；Prevent reactor Reservoir pressure exceeds security restriction；Discharge waste heat is to reach and maintain shutdown state, prevention fuel to damage and will be safe Shell pressure limit is under design value；Enough process monitorings are provided to executing and controlling the safe shutdown function；To be used for The operation of the equipment of the safe shutdown, which provides, supports function.
16. the water logging subregion division methods of nuclear power plant according to claim 13, which is characterized in that in the step S32 The computational methods of ideal water logging water level are：
h1=(Q-B)/A
Wherein：h1For ideal water logging water level；
Q is water logging total flow；
B is the drain discharge of sump pump, pumping equipment；
A is net floor area.
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