阅读说明：本技术 一种核电机组完全卸料后的核安全控制方法 (A kind of nuclear safety control method after nuclear power unit complete unloading ) 是由 罗霄 易绍峰 柳文斌 苏燕超 李德昌 于 2019-08-26 设计创作，主要内容包括：本发明涉及一种核电机组完全卸料后的核安全控制方法,通过反应性控制、余热导出、放射性屏蔽及辅助支持系统四个方面对电厂设备进行管理,保证完全卸料后乏燃料池的冷却及补水水源；其中,所述反应性控制包括控制乏燃料池硼浓度及燃料装载方式；所述余热导出包括控制乏燃料水池水水装量；确保乏燃料池非能动补给水源可运行；所述放射性屏蔽包括确保放射性气液态排出物辐射监测仪表可运行；所述辅助支持系统包括确保交直流配电系统、乏燃料池气闸门系统及地震监测系统可运行。本发明通过对核电机组完全卸料后的反应性控制、余热导出、放射性屏蔽以及辅助支持系统的监测与控制,极大的提升了AP1000核电机组完全卸料后的核安全性。(The present invention relates to the nuclear safety control methods after a kind of nuclear power unit complete unloading, electric power factory equipment is managed by four reactivity control, waste heat export, radioactive shield and auxiliary support system aspects, guarantees the cooling and water supply source in spentnuclear fuel pond after complete unloading；Wherein, the reactivity control includes control spentnuclear fuel pond boron concentration and fuel loading mode；The waste heat export includes control Spent Fuel Pool water water loading amount；Ensure that the passive nourishment source in spentnuclear fuel pond can be run；The radioactive shield includes ensuring that radioactivity liquid state effluent Radiation monitoring instrument can be run；The auxiliary support system includes ensuring that alternating current-direct current distribution system, spentnuclear fuel pond air-lock door system and earthquake monitoring system can be run.The present invention passes through the nuclear safety to reactivity control, waste heat export, the monitoring and control of radioactive shield and auxiliary support system after nuclear power unit complete unloading, after being greatly improved AP1000 nuclear power unit complete unloading.)

1. the nuclear safety control method after a kind of nuclear power unit complete unloading, which is characterized in that led by reactivity control, waste heat Out, four aspects of radioactive shield and auxiliary support system are managed electric power factory equipment, guarantee spentnuclear fuel pond after complete unloading Nuclear safety；Wherein,

The reactivity control includes that control spentnuclear fuel pond boron concentration meets nuclear power unit Technical specification requirement, loads weary pond Mode meets nuclear power unit Technical specification requirement；

The waste heat export includes that control Spent Fuel Pool water level is higher by the storage screen work top at least distance of 7.01m；Ensure weary The passive nourishment source of fuel tank can be run；Guarantee that active weary pond water supply source can be run；Guarantee that cold source can be run；

The radioactive shield includes ensuring that radioactivity liquid discharge stream Radiation monitoring instrument can be run, and makes the radioactivity of discharge stream Level is in the limit value of permission；Ensure that radioactivity gaseous effluent stream Radiation monitoring instrument can be run；Ensure VAS system, VBS system System, VFS system, VES system, WLS system, WGS system need to run；

The auxiliary support system includes ensuring that ECS system, 1E grades of DC power supply subsystems, safety level UPS, distribution system, non- 1E grades of direct currents and uninterruptible power system, VTS system, FPS system part relevant to weary pond, FHS air-lock accelerator control system, Seismic instrument can be run, it is ensured that the column of cas system two, the column of VWS system two can be run.

2. the nuclear safety control method after nuclear power unit complete unloading as described in claim 1, which is characterized in that the guarantee Active weary pond water supply source is available to include ensuring that the demineralized water of DWS can be used for supplementing the weary water due to evaporation；Ensure that CVS can be to Weary pond moisturizing；Ensure that PCCAWST can be pumped by PCS to weary pond moisturizing.

3. the nuclear safety control method after nuclear power unit complete unloading as described in claim 1, which is characterized in that the guarantee Cold source is available to include ensuring that SFS system, RNS system, CCS system, the pump in SWS system and respective heat exchanger can be run.

4. the nuclear safety control method after nuclear power unit complete unloading as described in claim 1, which is characterized in that described to ensure Radioactivity liquid discharge stream Radiation monitoring instrument, which can be run, includes ensuring that nuclear island radioactive liquid waste discharge radiation monitor, factory Waste water system slot type discharge manifold radiation monitor, factory site waste disposal facilities are produced with water discharge radiation monitor, conventional island Discharging of waste liquid radiation monitor, decontamination and hot overhaul shop discharging of waste liquid radiation monitor, effluent/putting laboratory waste liquid row Radiation protection monitor can be run.

5. the nuclear safety control method after nuclear power unit complete unloading as described in claim 1, which is characterized in that described to ensure Radioactivity gaseous effluent stream Radiation monitoring instrument, which can be run, includes ensuring that the normal range radiation of chimney of electric plant in VFS-JS-01 system Monitor at least one channel can be run, it is ensured that chimney of electric plant accident range radiation monitor at least one in VFS-JS-02 system Channel can be run.

6. the nuclear safety control method after nuclear power unit complete unloading as described in claim 1, which is characterized in that will be reactive The key parameter of operation can be controlled in control, waste heat export, radioactive shield and auxiliary support system by master control room and is set Standby integrative display is on same human-computer interaction interface.

7. the nuclear safety control method after nuclear power unit complete unloading as claimed in claim 6, which is characterized in that described man-machine Interactive interface includes the auxiliary support mould of the operating status and operating parameter for detecting display nuclear power unit auxiliary support system Block, for detect display the passive water charging system in spentnuclear fuel pond operating status and operating parameter the passive moisturizing in spentnuclear fuel pond Module, for detecting the active cooling in weary pond and benefit that show the operating status and operating parameter of the active cooling in weary pond and water charging system Water module, for detect display radioactivity monitoring system operating status and operating parameter radioactivity monitoring module and be used for The operating status of detection display ventilating system and the ventilation module of operating parameter.

8. the nuclear safety control method after nuclear power unit complete unloading as claimed in claim 7, which is characterized in that the auxiliary Support module include AC power supply system, DC power system, full factory's compressed air and instrument air system and electric equipment compartment sky Adjusting system.

9. the nuclear safety control method after nuclear power unit complete unloading as claimed in claim 7, which is characterized in that the weary combustion The operating status and operating parameter of the passive moisturizing module of material pond include spentnuclear fuel pond boron concentration and sample time, spentnuclear fuel pond temperature Degree, liquid level.

10. the nuclear safety control method after nuclear power unit complete unloading as claimed in claim 7, which is characterized in that described weary The active cooling in pond and moisturizing module include 3 containment isolating valves of SFS system, the cooling required active pump in weary pond, moisturizing road Diameter valve.

Technical field

The present invention relates to technical field of nuclear power, in particular to the nuclear safety control after a kind of nuclear power unit complete unloading Method processed.

Background technique

PWR nuclear power plant will do it refueling outage after it runs a fuel recycle.Period can by nuclear fuel assembly from Reactor core is transferred to spentnuclear fuel pond to carry out the replacement of fuel assembly, keep in.When all nuclear fuels are stored in spentnuclear fuel The center of gravity of nuclear safety is transferred to spentnuclear fuel pond by primary Ioops when pond, at this time due to guaranteeing the power supply of nuclear safety, water source, gas source, cold There is the demand of maintenance in source equipment component, if meeting with earthquake, tsunami, losing the disasters such as dispatch from foreign news agency network source or artificial unit control Make it is improper may cause weary pond and lose cold, dehydration, and then lead to weary pool boiling, with boron water evaporation, irradiated fuel assembly is exposed, waste heat It can not take out of, irradiated fuel assembly thawing be eventually led to, to a large amount of radioactive products of Environment release after involucrum destruction.Current practice is Cooling medium and radioactive shield layer of the boron water as irradiated fuel assembly are injected in spentnuclear fuel pond, so the nuclear safety in spentnuclear fuel pond Control stress point guarantees enough boron water and guarantees lasting cooling.

The classification of mode is not covered with all fuel assemblies and is transferred to spentnuclear fuel in AP1000 nuclear power unit Technical specification The case where pond, that is, reactor core complete unloading, state are converted in checklist regulation also without the checklist of complete unloading.It is unloaded completely in unit The nuclear safety in spentnuclear fuel pond guarantees to have in the case where material and four only in Technical specification provide.This will generate one and ask Topic exists in the case that set state after complete unloading meets Technical specification requirement, due to non-disaster or equipment deficiency Other reasons (such as overhaul of the equipments window is unreasonable) still have weary pond to lose the cooling possibility for leading to weary pool boiling, this is also power plant Operations staff and state supervision authorities are unacceptable.Since third generation AP1000 nuclear power unit is passive design and final cold Source is atmosphere, and equipment component is detached from nuclear safety correlation and degrades while reducing large number of equipment, therefore electric in design concept Source, cold source, gas source etc. support function no longer related to nuclear safety.But under complete unloading operating condition, when these support functions by It can challenge to the nuclear safety in spentnuclear fuel pond when threat.Such as ECS is not required in complete unloading operating condition, Technical specification (main power source system) can be run, and when practical operation, if very that ECS system is out of service, spentnuclear fuel pond cooling pump will lose dynamic Power power supply, that is, weary pond loses cooling, and the heat of spentnuclear fuel is taken away in the explosive evaporation by weary pond.

Summary of the invention

In order to solve the above technical problems, the present invention provides the nuclear safety control method after a kind of nuclear power unit complete unloading, The working efficiency of reactor operator can be greatly improved on the basis of ensuring nuclear safety.

The technical solution adopted by the present invention is that: the nuclear safety control method after providing a kind of nuclear power unit complete unloading is led to It crosses reactivity control, waste heat export, radioactive shield and four aspects of support system is assisted to be managed electric power factory equipment, guarantee The nuclear safety in spentnuclear fuel pond after complete unloading；Wherein,

The reactivity control includes that control spentnuclear fuel pond boron concentration meets nuclear power unit Technical specification requirement, makes weary pond Load mode meets nuclear power unit Technical specification requirement；

The waste heat export includes that control Spent Fuel Pool water level is higher by the storage screen work top at least distance of 7.01m；Really Protecting the passive nourishment source in spentnuclear fuel pond can run；Guarantee that active weary pond water supply source can be run；Guarantee that cold source can be run；

The radioactive shield includes ensuring that radioactivity liquid discharge stream Radiation monitoring instrument can be run, and makes putting for discharge stream Penetrating property level is in the limit value of permission；Ensure that radioactivity gaseous effluent stream Radiation monitoring instrument can be run；Ensure VAS system, VBS System, VFS system, VES system, WLS system, WGS system need to run；

The auxiliary support system includes ensuring that ECS system, 1E grades of DC power supply subsystems, safety level UPS, power distribution system The air lock door control of system, non-1E grades of direct current and uninterruptible power system, VTS system, FPS system part relevant to weary pond, FHS System, seismic instrument can be run, it is ensured that the column of cas system two, the column of VWS system two can be run.

It is described to guarantee that active weary pond is mended in the nuclear safety control method after nuclear power unit complete unloading of the present invention Water water source is available to include ensuring that the demineralized water of DWS can be used for supplementing the weary water due to evaporation；Ensure that CVS can be to weary pond moisturizing； Ensure that PCCAWST can be pumped by PCS to weary pond moisturizing.

In the nuclear safety control method after nuclear power unit complete unloading of the present invention, the guarantee cold source can use packet Including ensures that SFS system, RNS system, CCS system, the pump in SWS system and respective heat exchanger can be run.

It is described to ensure radioactivity liquid in the nuclear safety control method after nuclear power unit complete unloading of the present invention Discharge stream Radiation monitoring instrument, which can be run, includes ensuring that nuclear island radioactive liquid waste discharge radiation monitor, station-service water discharge spoke Penetrate monitor, conventional island production waste water system slot type discharge manifold radiation monitor, factory site waste disposal facilities discharging of waste liquid spoke Penetrate monitor, decontamination and hot overhaul shop discharging of waste liquid radiation monitor, effluent/putting laboratory waste liquid discharge Radiation monitoring Instrument can be run.

It is described to ensure radioactivity gaseous state in the nuclear safety control method after nuclear power unit complete unloading of the present invention Discharge stream Radiation monitoring instrument, which can be run, includes ensuring that the normal range radiation monitor of chimney of electric plant is at least in VFS-JS-01 system 1 channel can be run, it is ensured that chimney of electric plant accident range radiation monitor at least one channel can be run in VFS-JS-02 system.

In the nuclear safety control method after nuclear power unit complete unloading of the present invention, by reactivity control, waste heat The key parameter of operation can be controlled by master control room in export, radioactive shield and auxiliary support system and integration of equipments is shown On same human-computer interaction interface.

In the nuclear safety control method after nuclear power unit complete unloading of the present invention, the human-computer interaction interface packet Include the auxiliary support module of the operating status and operating parameter for detecting display nuclear power unit auxiliary support system, for detecting Show the passive moisturizing module in spentnuclear fuel pond of the operating status and operating parameter of the passive water charging system in spentnuclear fuel pond, for examining The active cooling in weary pond of the operating status and operating parameter of the active cooling in the weary pond of survey display and water charging system and moisturizing module are used for Detection shows the operating status of radioactivity monitoring system and the radioactivity monitoring module of operating parameter and shows for detection logical The operating status of wind system and the ventilation module of operating parameter.

In the nuclear safety control method after nuclear power unit complete unloading of the present invention, the auxiliary support module packet Include AC power supply system, DC power system, full factory's compressed air and instrument air system and electric equipment compartment air-conditioning system；

In the nuclear safety control method after nuclear power unit complete unloading of the present invention, the spentnuclear fuel pond is passive The operating status and operating parameter of moisturizing module include spentnuclear fuel pond boron concentration and sample time, spentnuclear fuel pond temperature, liquid level.

In the nuclear safety control method after nuclear power unit complete unloading of the present invention, the active cooling in the weary pond and Moisturizing module includes 3 containment isolating valves of SFS system, the cooling required active pump in weary pond, moisturizing path valve.

The present invention passes through to reactivity control, the waste heat export, radioactive shield and auxiliary after nuclear power unit complete unloading The monitoring and control for helping support system, the nuclear safety after being greatly improved nuclear power unit complete unloading, meanwhile, by man-machine Interactive interface is integrated with the nuclear power unit relevant key parameter of nuclear safety and equipment under complete unloading operating condition.Reactor operator It can quickly be positioned by the interface about reactivity control, waste heat export, radioactive shield and the correlation of support system is assisted to set Standby and parameter, and intervened in time, the working efficiency of reactor operator is greatly improved on the basis of ensuring nuclear safety.

Detailed description of the invention

Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:

Fig. 1 is the condition that weary pond load mode needs to meet in the embodiment of the present invention；

Fig. 2 is the radioactivity liquid discharge stream Radiation monitoring instrument for needing to monitor in the embodiment of the present invention；

Fig. 3 and Fig. 4 is the instrument facility for needing to monitor in the embodiment of the present invention；

Fig. 5 is the view of human-computer interaction interface in the embodiment of the present invention.

Specific embodiment

In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.

The embodiment of the present invention is illustrated by taking AP1000 nuclear power unit as an example, and the present embodiment provides a kind of AP1000 nuclear power machines Nuclear safety control method after group complete unloading passes through reactivity control, waste heat export, radioactive shield and auxiliary support system Four aspects are managed electric power factory equipment, ensure that the cooling and water supply source in spentnuclear fuel pond after complete unloading.

Specifically, the reactivity control includes:

A) weary pond boron concentration is controlled, when fuel assembly is stored in spentnuclear fuel pond, and is fired for the last time from spentnuclear fuel pond Boron concentration confirmation in spentnuclear fuel pond is not yet carried out after material component is mobile, spentnuclear fuel pond boron concentration should should meet AP1000 Technical specification Requirement, such as >=2300ppm.

B) weary pond load mode, any time, any one need to be stored in 2nd area of Spent Fuel Pool storage screen work fuel Component need to guarantee that the combination of each irradiated fuel assembly initial enrichment and burnup of the storage of 2nd area should meet AP1000 technical specification The requirement of book, i.e. restrictive condition as defined in Fig. 1.

The waste heat exports

A) weary pool water level is controlled, it is ensured that Spent Fuel Pool water level should be higher by the storage screen work top at least distance of 7.01m.It is real Existing method: confirmation tri- pieces of instrument liquid levels of SFS-LT019A/B/C >=(fuel assembly length+7.01) m.

B) weary pond nourishment source, it is ensured that spentnuclear fuel pond nourishment source should can be run.

(1) when spentnuclear fuel pond calculate decay heat > 4.6MWt simultaneously≤7.2MWt when, service sink needs can run.Realization side Method: 1) confirm SFS-LT020 >=4.19m；2) confirm SFS-V042, SFS-V045, SFS-V049, SFS-V066, SFS-V068 It can run；3) SFS-V042, SFS-V045, SFS-V049 are closed；4) open SFS-V066, SFS-V068 complete service sink with it is weary The connection in pond.

(2) when spentnuclear fuel pond calculate decay heat > 5.5MWt simultaneously≤7.2MWt when, service sink and charging pond need can transport Row.Implementation method: 1) confirm SFS-LT020 >=4.19m and SFS-LT022 >=13.38m；2) confirm SFS-V042, SFS- V045, SFS-V049, SFS-V066, SFS-V068 can be run；3) SFS-V042, SFS-V045, SFS-V049 are closed；4) it opens The connection of SFS-V066, SFS-V068 completion service sink and weary pond.5) charging pond and weary pond air lock door (FHS-MY-Y02) are opened Complete the connection in charging pond and weary pond.

(3) as the spentnuclear fuel pond decay heat>7.2MWt calculated and reactor decay heat<6MW of calculating, passive peace Full shell cooling water source needs can be run.The scope of application: when the fuel stored in spentnuclear fuel pond calculates decay heat > 4.6MWt.It realizes Method: 1) confirm PCCWST water loading amount >=2967m³2) confirmation PCS-V009, PCS-V045, PCS-V051 can run and open root Refill flow is adjusted according to PCS-FIT039 flowmeter.

C) guarantee that active weary pond water supply source is available.

(1) demineralized water of DWS is used to supplement the weary water due to evaporation.Implementation method: 1) confirm DWS system at least one arrange It can run；2) confirmation SFS-V050 can be run；3) demineralized water can be supplemented to weary pond by opening SFS-V050.

(2) CVS is to weary pond moisturizing.Implementation method: 1) confirm that the column of CVS at least one can be run；2) it is arranged on the soft behaviour of CVS and mends To boron concentration and increment；3) draining first is rinsed to RCDT (preventing from accidentally diluting weary pond) to pipeline；4) open CVS to The water compensating valve CVS-V132 of SFS system；5) starting CVS pump is to weary pond moisturizing.

(3) PCCAWST is pumped by PCS to weary pond moisturizing.Implementation method: 1) confirm PCCAWST water loading amount > 3350m³；2) PCS recirculation pump provides PCCWST circular flow > 22.7m³/h；3) confirm that every PCS recirculation pump is cold from passive containment But auxiliary water tank is to PCCWST feed flow > 22.7m³/h；

(4) FPS is to weary pond moisturizing.Implementation method: the confirmation column of FPS two can be run.

D) guarantee cold source.

(1) two series of SFS (including pump and respective heat exchanger) need to run.Implementation method: confirmation SFS-MP-01A And SFS-MP-01B can be run, corresponding heat exchanger is without maintenance.

(2) at least one series (including pump and respective heat exchanger) of RNS needs to run.Implementation method: confirmation RNS-MP- 01A or RNS-MP-01B can be run, and corresponding heat exchanger is without maintenance.

(3) two series of CCS (including pump and respective heat exchanger) need to run.Implementation method: confirmation CCS-MP-01A And CCS-MP-01B needs to run, corresponding heat exchanger is without maintenance.

(4) two series of SWS (including pump and respective heat exchanger) need to run.Implementation method: confirmation SWS-MP-01A And SWS-MP-01B needs to run, corresponding heat exchanger is without maintenance.

The radioactive shield includes:

A) radioactivity liquid discharge stream Radiation monitoring, it is ensured that the radioactivity liquid discharge stream Radiation monitoring instrument in Fig. 2 is It can run, the radioactive level of discharge stream is in the limit value of permission.Specifically including ensures nuclear island radioactive liquid waste discharge Radiation monitor, station-service water discharge radiation monitor, conventional island produce waste water system slot type discharge manifold radiation monitor, factory site Waste disposal facilities discharging of waste liquid radiation monitor, decontamination and hot overhaul shop discharging of waste liquid radiation monitor, effluent/putting Laboratory waste liquid discharge radiation monitor can be run.

B) radioactivity gaseous effluent stream Radiation monitoring, it is ensured that VFS-JS-01 (the normal range radiation monitor of chimney of electric plant) At least one channel can be run, VFS-JS-02 (chimney of electric plant accident range radiation monitor) at least one channel can be run.It is existing Technology non-mode after complete unloading defines, if but weary pond there is loss of-coolant accident (LOCA), the radgas that fuel plant generates will lead to It crosses VAS ventilating system to send to chimney of electric plant, the radioactivity to environment can not be found out if the radiation monitor of chimney is unavailable Discharge amount.

C) VAS system needs to run, in order to keep the ventilation in weary pond hall to keep weary pond hall micro- negative relative to external environment Pressure.In addition cooling also is aerated for nuclear island and auxiliary plant electric equipment compartment.Implementation method: full cut-off is without maintenance in confirmation VAS system.

D) VBS system needs to run, if the operating condition that damaged radioactivity is overflowed occurs in weary pond fuel component, radioactivity can not Controlled release is put early period, and the fresh air and circulated air that VBS may filter that as master control room air-supply guarantee the safety that power plant is controlled to operator one Environment.Implementation method: it is overhauled in confirmation VBS system without full cut-off.

E) VFS system needs to run, if the operating condition that damaged radioactivity is overflowed occurs in weary pond fuel component, VAS system can The high efficiency particulate air filter to VFS system, through VFS is sent to purify heel row to atmosphere the radgas in weary pond hall.Implementation method: really Recognize in VFS system and is overhauled without full cut-off.

F) VES system needs to run, if the operating condition that damaged radioactivity is overflowed occurs in weary pond fuel component, radioactivity can not When controlled release is put, VES system can guarantee the security context that power plant is controlled to operator one.

G) WLS system needs to run, can be by draining to WLS when little damage occurs in weary pond fuel, while CVS To weary pond moisturizing mode to weary Chi Huanshui, guarantee that the radioactive indicator in weary pond is met the requirements.Implementation method: confirmation WLS system On without service work.

H) WGS system needs to run, and receives the exhaust gas from RCDT and WLS system, controllably discharges after radioactivity is handled. Implementation method: without service work in confirmation WGS system

The auxiliary support system includes:

A) ensure that ECS system is run.

(1) interior power needs to run with external power all the way all the way, and interior power refers to two diesel-driven generators；External power refers to By house transformer fall power transmission or auxiliary transformer power supply.

(2) the ECS alternating-current distribution panel of equipment required by needs that (implementable to power again) can be run.

(3) the active equipment needed should be by same row power supply power supply, as the operation column of CCS, SFS, SWS, RNS system should be by Same row power supply power supply.

B) 1E grades of DC power supply subsystems need to run, and are that nuclear safety correlate meter or distribution board are powered

C) safety level UPS needs to run, to support power plant 1E grades of distribution subsystem.

D) necessary part of distribution system, DC distribution subsystem, exchange instrument and control bus distribution subsystem should be protected Holding can run, with support need keep can operating status equipment.

E) non-1E grades of direct current and uninterruptible power system (EDS) need to run, and are that PLS system and non-security grade instrument supply Electricity.

F) column of cas system two need to run, gas source needed for providing gas source needed for power plant controls and overhauling.Implementation method: really Cas system is recognized without maintenance.

G) column of VWS system two need to run, and provide chilled water for each air-conditioning system such as VAS and VTS.Implementation method: really Recognize in VWS system without service work.

H) VTS system needs to run, and is aerated cooling for conventional island electric equipment compartment.Implementation method: nothing on confirmation VTS system Service work.

I) FPS system part relevant to weary pond needs to run, and FPS need to guarantee disappearing for weary pond hall as fire-fighting system Anti- detection can be run, and spray pipe can put out a fire in the case of fire for weary pond hall.Implementation method: confirm weary pond hall phase The fire-fighting of pass and its detection system are without maintenance.

J) the air-lock accelerator control system of FHS needs to run, and the air lock door between weary pond and transmission pond, weary pond and tinning pond rises To the effect for guaranteeing weary water loading amount, need to run.Implementation method: equipment relevant to air-lock door operation is without service work.

K) other instrument facilities, seismic instrument can be run, as shown in Figure 3 and Figure 4.

As shown in figure 5, the present embodiment is also by reactivity control, waste heat export, radioactive shield and auxiliary support system In can by master control room control operation key parameter and integration of equipments be shown on same human-computer interaction interface.The man-machine friendship Mutual interface include for detect display nuclear power unit assist the operating status of support system and the auxiliary support module of operating parameter, For detecting the passive moisturizing mould in spentnuclear fuel pond of the operating status and operating parameter of the display passive water charging system in spentnuclear fuel pond Block, for detecting the active cooling in weary pond and moisturizing that show the operating status and operating parameter of the active cooling in weary pond and water charging system Module, for detect display radioactivity monitoring system operating status and operating parameter radioactivity monitoring module and for examining Survey the operating status of display ventilating system and the ventilation module of operating parameter.

The auxiliary support module includes AC power supply system, DC power system, full factory's compressed air and instrument air System and air-conditioning system for electric equipment compartment.

The passive moisturizing module in spentnuclear fuel pond include spentnuclear fuel pond boron concentration and sample time, spentnuclear fuel pond temperature, The nuclear safety key parameter such as liquid level.

The active cooling in the weary pond and moisturizing module include 3 containment isolating valves of SFS system, and weary pond cooling is required Active pump, moisturizing path valve and flow indication.

The radioactivity monitoring module includes the radioactivity monitoring at several places such as exhaust gas, waste liquid, chimney and master control room.

The ventilation module contains the control of weary pond hall draft fan, air door；The control of electric equipment compartment draft fan, air door System；Master control room radioactivity filtration circuit control etc..

The embodiment of the invention provides the nuclear safety control methods after a kind of nuclear power unit complete unloading, are controlled by reactivity Four system, waste heat export, radioactive shield and auxiliary support system aspects are managed electric power factory equipment, ensure that complete unloading The cooling and water supply source in spentnuclear fuel pond afterwards；Meanwhile third generation AP1000 nuclear power unit is integrated with by human-computer interaction interface and is existed The relevant key parameter of nuclear safety and equipment under complete unloading operating condition.Reactor operator can quickly be positioned by the interface about Reactivity control, waste heat export, radioactive shield and the relevant device and parameter that assist support system, and intervened in time, The working efficiency of reactor operator is greatly improved on the basis of ensuring nuclear safety.

The embodiment of the present invention is described in conjunction with attached drawing above, but the invention is not limited to above-mentioned specific Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much Form, all of these belong to the protection of the present invention.