CN102054537B - Nuclear class-1 equipment performance test system and method - Google Patents
Nuclear class-1 equipment performance test system and method Download PDFInfo
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- CN102054537B CN102054537B CN200910109639.2A CN200910109639A CN102054537B CN 102054537 B CN102054537 B CN 102054537B CN 200910109639 A CN200910109639 A CN 200910109639A CN 102054537 B CN102054537 B CN 102054537B
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- 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
- Y02E30/30—Nuclear fission reactors
Abstract
The invention provides a nuclear class-1 equipment performance test method and a nuclear class-1 equipment performance test system, which can test the performance of third-generation and second-generation pressurized water reactor power plant nuclear class-1 equipment under the conditions of the in-accident and after-accident environments in a safety shell, ensure the realization of the temperature and pressure control precision in a preset time period in a thermal shock period and obtain the parameters meeting the requirements of international standards on the test of the performance of third-generation and second-generation pressurized water reactor power plant nuclear class-1 equipment under the conditions of the in-accident and after-accident environments in the safety shell.
Description
Technical field
The present invention relates to nuclear power technology field, relate in particular to a kind of core one-level equipment performance test macro and method.
Background technology
Nuclear safety codes requirement; for guaranteeing that nuclear power station is at accidental conditions, energy safe operation under operating mode after accident conditions and accident, protection public health and safety; must carry out a series of design tests to nuclear safety system and equipment, can checking carry out its expectation function.For the core one-level nuclear power generating equipment in containment, they must maintain normal trouble free service function during coolant loss accident He after accident, therefore carry out in simulating Safety shell during accident the performance test under heat power and electrochemical conditions very necessary.The core of this experiment is: the simulation of operating mode harsh and unforgiving environments operating mode during accident and after accident in containment, and tested equipment specific function is investigated device.In containment, the simulation of operating mode harsh and unforgiving environments operating mode after accident and accident, realizes specific temperature and pressure exactly, and chemical environment.
Prior art provides the performance test stand of core one-level equipment under the interior accident environmental baseline of a kind of containment, and its thermal technology and chemical environment are to realize in test cabin (hereinafter to be referred as LOCA stove), and its volume is 2.48m to the maximum
3.Obviously, LOCA furnace volume limits the scope of tested equipment, and because LOCA furnace volume is too little, a lot of core one-level equipment can not carry out accident environmental performance test in containment.And cannot reach at the appointed time two generation unit the temperature that requires of thermal shock, can not ensure that in the thermal shock stage temperature is uniformly distributed, causing the actual bearing temperature pressure of tested equipment is not the temperature, pressure of regulation.Because the testing requirements of three generations's unit is not considered in the performance test system design of existing core one-level equipment, this system can not meet three generations's unit environmental test.
Summary of the invention
The technical matters that the present invention solves is: solve three generations and two generation presurized water reactor unit core one-level equipment performance tests under accident environmental baseline in containment, and ensure that the thermal shock stage realizes and the control accuracy of temperature, pressure at the appointed time, with reach meet international norm requirement three generations and two generation presurized water reactor unit core one-level equipment in the parameter of accident environmental baseline test request.
For solving the problems of the technologies described above, the embodiment of the present invention provides a kind of core one-level equipment performance test macro, comprising:
LOCA stove, tests for the performance of the core one-level equipment to being placed therein;
Drum, for storing steam, and to described LOCA stove supply steam;
Wherein, described LOCA stove comprises main element, appurtenances and the attached technique mouth of pipe;
Described main element comprises: the cylindrical shell with certain enclosure space;
Described appurtenances comprise: for the electric heater that LOCA stove space is heated;
The attached technique mouth of pipe of described LOCA stove comprises: steam inlet, chemical solution import, chemical solution outlet, upper evacuation port, lower evacuation port, compressed air inlet; LOCA stove space temperature measurement instrument interface, pressure measuring instruments interface and level gauging instrument interface;
The chemical solution import of described LOCA stove is for inputting chemical solution to described LOCA stove, and described LOCA stove middle and lower part is also provided with the liquid level gauge being connected with described level gauging instrument interface, for measuring the liquid level of the chemical solution that enters described LOCA stove;
On the steam inlet of described LOCA stove, be provided with quick-opening valve parallel with one another and variable valve;
Wherein, in the thermal shock stage of performance test, described quick-opening valve and variable valve are for supplying with steam to control the space temperature of LOCA stove by supplying with/stop to described LOCA stove; Described quick-opening valve, variable valve and described upper evacuation port, lower evacuation port are for controlling in real time the pressure in described LOCA stove;
In non-thermal assault phase, described variable valve is supplied with steam to control the space temperature in LOCA stove for supplying with/stop to described LOCA stove; Described compressed air inlet is for adding pressurized air to control the pressure in described LOCA stove to described LOCA stove; Described upper evacuation port and lower evacuation port are for controlling the pressure in described LOCA stove.
The embodiment of the present invention also provides a kind of method of carrying out the core one-level equipment performance test of two generations in core one-level equipment performance test macro, comprising:
In first and second stage, heat and maintain the temperature in described LOCA stove;
Phase III, the pipeline of LOCA stove input steam carries out, after heating coil, closing the outlet valve of described drum described in subtend, in drum, pours steam; Open quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, regulate the pressure in described LOCA stove, before caloric impact temperature peak value arrives, close described quick-opening valve and upper evacuation port and lower evacuation port, by variable valve to continuing to fill steam in LOCA stove, with the pressure in LOCA stove described in compressed air inlet and upper evacuation port and lower evacuation port control;
Fourth stage, closes the steam inlet total valve of LOCA stove, closes admission valve and the outlet valve of described drum, makes described LOCA stove naturally cooling;
Five-stage, when in LOCA stove, temperature drops to predetermined temperature value, the electric heater starting on described LOCA stove heats the space temperature of its LOCA stove;
In the 6th stage, the pipeline of LOCA stove input steam carries out, after heating coil, closing the outlet valve of described drum described in subtend, in drum, is filled with steam; Open quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, regulate the pressure in described LOCA stove, before caloric impact temperature peak value arrives, close described quick-opening valve and upper evacuation port and lower evacuation port, by variable valve to continuing to fill steam in LOCA stove, with the pressure in LOCA stove described in compressed air inlet and upper evacuation port and lower evacuation port control; Open the valve of described chemical solution import, start spray pump, produce shower water and enter described LOCA stove from described chemical solution inflow point, the steam in described LOCA stove is cooled to liquid by shower water, discharges through chemical solution outlet.
The 7th stage, close the valve of spray pump and chemical solution import, regulate by the variable valve at steam inlet place the steam that enters LOCA stove, control the temperature and pressure in described LOCA stove;
The 8th stage, close described steam inlet total valve, open described upper evacuation port and lower evacuation port, so that described LOCA furnace inner space temperature drops to normal temperature, make its pressure drop to normal pressure.
Accordingly, the embodiment of the present invention also provides a kind of method of carrying out the test of three generations's core one-level equipment performance in core one-level equipment performance test macro, it is characterized in that, comprising:
In first and second stage, heat and maintain the temperature in described LOCA stove;
Phase III, open described steam inlet total valve saturated vapour is inputted to reheater, after reheater heating pressurization, input drum, after being cooled to liquid by shower water, described LOCA stove discharges; Stablize vapor (steam) temperature and the pressure of reheater outlet; Close the outlet of drum, drum is poured to steam; Open quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, regulate the pressure in described LOCA stove, before caloric impact temperature peak value arrives, close described quick-opening valve and upper evacuation port and lower evacuation port, by variable valve to continuing to fill steam in LOCA stove, with the pressure in LOCA stove described in compressed air inlet and upper evacuation port and lower evacuation port control;
Fourth stage, closes the steam inlet total valve of LOCA stove, closes admission valve and the outlet valve of described drum, makes described LOCA stove naturally cooling;
Five-stage, when in LOCA stove, temperature drops to predetermined temperature value, the electric heater starting on described LOCA stove heats the space temperature of its LOCA stove;
In the 6th stage, the outlet temperature of reheater, pours steam to described drum described in preheating, makes the temperature and pressure in described drum reach predetermined value;
The 7th stage, close the valve of spray pump and chemical solution import, regulate by the variable valve at steam inlet place the steam that enters LOCA stove, control the temperature and pressure in described LOCA stove;
The 8th stage, close described steam inlet total valve, open described upper evacuation port and lower evacuation port, so that described LOCA furnace inner space temperature drops to normal temperature, make its pressure drop to normal pressure.
Implement the technical scheme that the embodiment of the present invention provides, can realize temperature and pressure control in LOCA stove simultaneously, and the steam flow and the regulating power that strengthen, make this core one-level equipment performance test macro reach the thermal shock requirement of two generations and the test of three generations's unit, other stages and thermally-stabilised phase temperature pressure controling precision are high.And temperature and pressure is realized and being uniformly distributed in LOCA stove, ensures that tested core one-level equipment bears the temperature, pressure of regulation, ensure that experiment is accurately reliable.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of a kind of core one-level equipment performance test macro embodiment mono-in the present invention;
Fig. 2 is the structural representation of a kind of core one-level equipment performance test macro embodiment bis-in the present invention;
Fig. 3 is the structural representation of a kind of core one-level equipment performance test macro embodiment tri-in the present invention;
Fig. 4 is the schematic flow sheet that carries out the embodiment of the method one of two generations core one-level equipment performance test in the present invention in core one-level equipment performance test macro;
Fig. 5 is the schematic flow sheet that carries out the embodiment of the method two of two generations core one-level equipment performance test in the present invention in core one-level equipment performance test macro;
Fig. 6 is the schematic flow sheet that carries out the embodiment of the method one of three generations's core one-level equipment performance test in the present invention in core one-level equipment performance test macro;
Fig. 7 is the schematic flow sheet that carries out the embodiment of the method two of three generations's core one-level equipment performance test in the present invention in core one-level equipment performance test macro.
Embodiment
The present invention is directed to above-mentioned the deficiencies in the prior art, a kind of core one-level equipment performance test macro and method are provided, the technical scheme that the embodiment of the present invention provides, realize temperature and pressure control in LOCA stove simultaneously, and the steam flow and the regulating power that strengthen, make this core one-level equipment performance test macro reach the thermal shock requirement of two generations and the test of three generations's unit, other stages and thermally-stabilised phase temperature pressure controling precision are high.And temperature and pressure is realized and being uniformly distributed in LOCA stove, ensures that tested core one-level equipment bears the temperature, pressure of regulation, ensure that experiment is accurately reliable.
Referring to Fig. 1, it is the structural representation of a kind of core one-level equipment performance test macro embodiment mono-in the present invention;
The core one-level equipment performance test macro that the present embodiment provides, comprising:
LOCA stove 2, tests for the performance of the core one-level equipment to being placed therein;
Drum 1, for storing steam, and supplies steam to described LOCA stove 2;
LOCA stove 2 comprises main element and appurtenances and the attached technique mouth of pipe; Described main element comprises: the cylindrical shell with certain enclosure space; Described appurtenances comprise: for to the space temperature of LOCA stove 2 with enter the electric heater 20 that steam wherein heats; It should be noted that, described steam is supplied with by special equipment, and by the control of steam inlet total valve;
The attached technique mouth of pipe of LOCA stove 2 comprises: steam inlet 21, chemical solution import 22, chemical solution outlet 23, upper evacuation port 24, lower evacuation port 25, compressed air inlet 26 and for measuring LOCA stove space temperature measurement instrument interface, pressure measuring instruments interface and level gauging instrument interface (not shown);
The chemical solution import 22 of described LOCA stove 2 is for inputting chemical solution to described LOCA2 stove, described LOCA stove 2 middle and lower parts are also provided with the liquid level gauge being connected with described level gauging instrument interface, for measuring the liquid level of the chemical solution that enters described LOCA stove 2; In the time that the liquid level of the chemical solution in described LOCA stove 2 exceedes the value of described liquid level gauge setting, described chemical solution is discharged from described chemical solution outlet 23.
The steam inlet 21 of LOCA stove 2 is provided with quick-opening valve parallel with one another 210 and variable valve 211; In the thermal shock stage of performance test, quick-opening valve 210 and variable valve 211 are supplied with steam to control the space temperature that enters LOCA stove 2 to LOCA stove 2, and quick-opening valve 210 and variable valve 211 and upper evacuation port 24 and lower evacuation port 25 are for controlling in real time the pressure in LOCA stove 2; In non-thermal assault phase, variable valve 211 is supplied with steam to control the space temperature in LOCA stove 2 to LOCA stove 2, and the pressurized air that air compressor machine produces is added pressurized air or controls the pressure in LOCA stove 2 by upper evacuation port 24 and lower evacuation port 25 in LOCA stove 2 by compressed air inlet 26;
It should be noted that, the volume of LOCA stove provided by the invention is greater than 2.48m
3, can meet the test needs to large-scale core one-level functions of the equipments.
A kind of core one-level equipment performance test macro that the embodiment of the present invention provides, owing to adopting large-scale LOCA stove, and can accurately simulate LOCA furnace temperature, pressure, and corrosion environment, can solve three generations and two generation presurized water reactor unit core one-level equipment performance tests during accident and under post accident environment condition in containment, and ensure that the thermal shock stage realizes the control accuracy of temperature and pressure at the appointed time, with reach meet international norm requirement three generations and two generation presurized water reactor unit core one-level equipment during accident and the parameter that requires of post accident environment condition test.
Referring to Fig. 2, it is the structural representation of a kind of core one-level equipment performance test macro embodiment bis-in the present invention;
The core one-level equipment performance test macro that the present embodiment provides comprises each ingredient of the system that embodiment mono-provides, and difference is that the core one-level equipment performance test macro that the present embodiment provides also comprises:
Chemical solution storage tank 5, for storage of chemical liquid;
Spray pump 3, is connected with described chemical solution storage tank 5, and while opening spray pump 3, the chemical solution in described chemical solution storage tank 5 is input to described LOCA stove 2 via described spray pump 3 from described chemical solution import 22;
Heat interchanger 4, cooling for the liquid of discharging through described chemical solution outlet 23 are carried out, then be input to described chemical solution storage tank 5 and store, when core one-level equipment is carried out to performance test, can recycle.The chilled water of described heat interchanger 4 is supplied with by cooling water pipeline, on this cooling water pipeline, be provided with cooling water inlet valve, in the time that cooling water inlet valve is opened, by pipeline, the cooling water inlet from heat interchanger enters heat interchanger 4 to chilled water, and discharge by coolant outlet, in addition, chilled water can also be input to chemical solution storage tank 5, for the concentration of chemical solution wherein described in regulating.
Optionally, the LOCA stove 2 in the present embodiment also comprises sewage draining exit, under special circumstances, empty processing to LOCA stove time, by this sewage draining exit, the residual liquid of testing use in LOCA stove is discharged to sewage treatment plant and processes.
Implement system provided by the invention, three generations and two generation presurized water reactor unit core one-level equipment performance tests under accident environmental baseline in containment are solved, and ensure that the thermal shock stage realizes and the control accuracy of temperature, pressure at the appointed time, with reach meet international norm requirement three generations and two generation presurized water reactor unit core one-level equipment in the parameter of accident environmental baseline test request.
In the present embodiment, for core one-level equipment is carried out to performance test, mainly utilize 180 DEG C, certain power station, the auxiliary steam of 1MPaa, realize environment temperature and pressure condition during accident and after accident in containment, for guaranteeing the core one-level equipment of all physical dimensions of envelope, nucleus equipment LOCA stove physical dimension and volume are as shown in table 1 below, and different forms is the needs for meeting different IPs level equipment:
Table 1
It should be noted that, in each embodiment of core one-level equipment performance test macro provided by the invention, system at least comprises the LOCA stove of a test use, but does not get rid of the situation that comprises multiple LOCA stoves.
Referring to Fig. 2, illustrate in the present invention that a kind of core one-level equipment performance test macro is at the embodiment of test two generations presurized water reactor unit core one-level equipment equally.
The technique mouth of pipe of the LOCA stove that the present embodiment provides also comprises the interface (not shown) of the various measuring instruments for measuring LOCA stove space temperature, pressure and liquid level, steam enters in LOCA stove 2 after by drum 1, in the different tests stage, steam flow difference, LOCA stove 2 steam inlet 21 places are provided with quick-opening valve in parallel 210 and variable valve 211, at thermal shock stage quick-opening valve 210 and variable valve 211 standard-sized sheet simultaneously, meet the needs that are rapidly heated, little in other stage steam requirements, supply with steam with variable valve 211.
The interior space temperature of LOCA stove 2 is controlled by variable valve 211 and the quick-opening valve 210 at steam regulation import 21 places.
On LOCA stove, be also provided with the measuring instrument of gaging pressure, according to the pressure number of degrees that show on pressure-measuring device, the valve opening of evacuation port, lower evacuation port, compressed air inlet in control.
In the thermal shock stage, LOCA stove 2 space pressure are by quick-opening valve 210 and the variable valve 211 at steam inlet 21 places, and realization is combined in the control of the valve of the upper evacuation port 24 of LOCA stove 2 and the valve of lower evacuation port 25.
For non-thermal assault phase, the 2 internal pressure controls of LOCA stove, add pressurized air or implement emptying realization at upper evacuation port 24 and lower evacuation port 25 to LOCA stove 2 by compressed air inlet 26, when pressure higher, open the valve row pressure of upper evacuation port 24 and lower evacuation port 25, on the low side when pressure, add pressurized air to supplement the pressure in LOCA stove 2 by compressed air inlet 26.It should be noted that, described upper evacuation port 24 and lower evacuation port 25 can communicate with each other, and also can carry out respectively emptying.
It should be noted that, for ensureing in good time temperature control, overcome the departure that the intrinsic hysteresis quality of general industry temperature element causes, the embodiment of the present invention adopts Millisecond reaction heat galvanic couple to measure in real time feedback space temperature.When LOCA stove is while being vertical, temperature element (and measuring instrument of measurement temperature) is arranged in the space, middle and upper part of LOCA stove outside along the even circumferential of LOCA stove, the medial temperature recording by the interface acquisition temperature element of temperature measuring set is as the control parameter of steam regulating valve aperture.And even for ensureing temperature field and pressure field, 4 points of imports that steam is uniformly distributed along the circumference from LOCA furnace tube top enter LOCA stove.
When LOCA stove is while being horizontal, steam enters LOCA stove from 4 point imports that are symmetrical in center line and axis on cylindrical shell top, and temperature element is evenly arranged in LOCA stove outside along the axis of LOCA stove, the medial temperature recording by the interface acquisition temperature element of temperature measuring set is as the control parameter of steam regulating valve aperture.
The thermal shock stage belongs to temperature and pressure field in LOCA and presents unstable state characteristic, inhomogeneous for overcoming thermal shock stage LOCA furnace interior temperature field and pressure field transient state, when opening steam quick-opening valve and variable valve, open upper and lower exhaust-valve simultaneously and force current downflow on steam, ensure that radial and axial temperature, pressure is evenly distributed so simultaneously.
The system that the embodiment of the present invention provides, adopts Automatic Control, and differential regulates, and valve is opened rapidly and timely adjustment, and the guarantee thermal shock stage is realized the control accuracy of temperature and pressure at the appointed time.
Referring to Fig. 3, it is the structural representation of a kind of core one-level equipment performance test macro embodiment tri-in the present invention.
In the present embodiment, describe mainly for the Performance Test System of three generations's presurized water reactor unit core one-level equipment.
As shown in Figure 3, three generations's presurized water reactor unit core one-level equipment is carried out to performance test, native system except comprise with above-mentioned two generation presurized water reactor unit core one-level equipment performance test macro 26S Proteasome Structure and Function, also comprise and need reheater 6, it is for pressurizeing input saturated vapour heating wherein, and be input to drum and store, its parameter is
| Design temperature pressure | 320℃ | 1.2MPa |
| Design discharge | 7-10t/h | |
| Out temperature | 170-180℃ | 280-310℃ |
For the performance test of three generations's presurized water reactor unit core one-level equipment, saturated vapour is introduced into reheater 6, and these reheater 6 heating steams are heated to 280-300 DEG C, pressure 0.9-1MPaa, and the steam after heating pressurization is input to drum 1 and stores, then inputted in LOCA stove 2 by drum 1.
The function and efficacy of the miscellaneous part in the present embodiment and embodiment mono-are similar, repeat no more, difference is, in the system that the present embodiment provides, comprise two LOCA stoves, wherein, 3#LOCA stove is the stand-by equipment of 1#LOCA stove, 1#LOCA stove is the LOCA stove that carries out core one-level equipment performance test use, and its function and efficacy will be described in detail in the performance test methods embodiment bis-that carries out three generations's presurized water reactor unit core one-level equipment in core one-level equipment performance test macro.
The system that the embodiment of the present invention provides, adopts PLC Automatic Control, and differential regulates, and valve is opened rapidly and timely adjustment, and the guarantee thermal shock stage is realized the control accuracy with temperature, pressure at the appointed time.
Referring to Fig. 4, for carry out the schematic flow sheet of embodiment of the method one of two generations core one-level equipment performance test in the present invention in core one-level equipment performance test macro.
The method of two generations core one-level equipment performance test that what the present embodiment provided carry out, mainly comprises the step that generates test environment:
Step 100, i.e. first and second stage, warm-up phase;
Be specially: heat and maintain the temperature in LOCA stove;
Step 101, i.e. the phase III, thermal shock is implemented and the thermally-stabilised stage;
Be specially: the pipeline of subtend LOCA stove input steam carries out, after heating coil, closing the outlet valve of drum, in drum, pours steam; Open quick-opening valve and the variable valve at the steam inlet place of LOCA stove, regulate the pressure in LOCA stove, before caloric impact temperature peak value arrives, close quick-opening valve and upper evacuation port and lower evacuation port, to continuing to fill steam in LOCA stove, use the pressure in compressed air inlet and upper evacuation port and lower evacuation port control LOCA stove by variable valve; It should be noted that, the technique mouth of pipe of the LOCA stove that the present embodiment provides comprises the interface of the various measuring instruments for measuring LOCA stove space temperature, pressure and liquid level, pass through temperature measuring set, the parameter recording, control the aperture of quick-opening valve and variable valve, the valve opening of evacuation port and lower evacuation port and compressed air inlet in the parameter control obtaining by pressure-measuring device.
Step 102, i.e. fourth stage, natural cooling stage;
Be specially: close the steam inlet total valve of LOCA stove, close admission valve and the outlet valve of drum, make LOCA stove naturally cooling;
Step 103, i.e. five-stage, thermally-stabilised stage;
Be specially: when in LOCA stove, temperature drops to predetermined temperature value, the electric heater starting on LOCA stove heats the space temperature of its LOCA stove;
Step 104, i.e. the 6th stage, thermal shock for the second time and spraying cooling stage;
Be specially: the pipeline of subtend LOCA stove input steam carries out, after heating coil, closing the outlet valve of drum, in drum, pours steam; Open quick-opening valve and the variable valve at the steam inlet place of LOCA stove, regulate the pressure in LOCA stove, before caloric impact temperature peak value arrives, close quick-opening valve and upper evacuation port and lower evacuation port, to continuing to fill steam in LOCA stove, use the pressure in compressed air inlet and upper evacuation port and lower evacuation port control LOCA stove by variable valve; Open the valve of chemical solution import, start spray pump, produce shower water and enter LOCA stove from chemical solution inflow point, steam in LOCA stove is cooled to liquid by shower water, discharges through chemical solution outlet, it should be noted that, in order to ensure to have in LOCA stove the chemical solution of certain volume, need to control by liquid level gauge the liquid level of chemical solution, the liquid level parameter obtaining by liquid level gauge, controls the valve opening that chemical solution exports.
Step 105, i.e. the 7th stage, thermally-stabilised stage;
Be specially: close the valve of spray pump and chemical solution import, regulate by the variable valve at steam inlet place the steam that enters LOCA stove, control the temperature and pressure in LOCA stove;
Step 106, i.e. the 8th stage, experiment ending phase;
Be specially: steam off import total valve, open evacuation port and lower evacuation port, so that LOCA furnace inner space temperature drops to normal temperature, make its pressure drop to normal pressure.
Through the step of above-mentioned generation test environment, in LOCA stove, manufacture temperature, pressure, the corrosion environment of test core one-level equipment, can to being placed on, core one-level equipment in LOCA stove carries out temperature resistance resistance to compression and erosion-resisting performance is tested.
Implement method provided by the invention, three generations and two generation presurized water reactor unit core one-level equipment performance tests under accident environmental baseline in containment are solved, and ensure that the thermal shock stage realizes the control accuracy of temperature and pressure at the appointed time, with reach meet international norm requirement three generations and two generation presurized water reactor unit core one-level equipment in the parameter of accident environmental baseline test request.
Referring to Fig. 5, for carry out the schematic flow sheet of embodiment of the method two of two generations core one-level equipment performance test in the present invention in core one-level equipment performance test macro;
Wherein, the stage 1-2 shown in Fig. 5 is warm-up phase, is specially:
Adopt the electric heater of LOCA stove to heat the space temperature to 50 DEG C in LOCA stove; In 24 hours, the space temperature of LOCA stove is maintained between 48 DEG C-52 DEG C.
Stage 3 shown in Fig. 5 implements and the thermally-stabilised stage for thermal shock, is specially:
Open the steam inlet total valve of LOCA stove to aperture 20%-50%, the pipeline of subtend LOCA stove input steam carries out heating coil;
Heating coil is complete, closes drum outlet, and to pouring steam in drum, making its temperature is 180 DEG C, and pressure is 1.0MPaa;
All open quick-opening valve and the variable valve at the steam inlet place of LOCA stove, to LOCA stove input steam, be rapidly heated so that LOCA furnace inner space temperature realizes;
Utilize upper evacuation port and the lower evacuation port of LOCA stove to regulate the pressure in LOCA stove;
At caloric impact temperature, to before peaking, the quick-opening valve in steam off exit, closes and closes evacuation port and lower evacuation port, enters the thermally-stabilised stage;
Utilize the variable valve of steam outlet to continue to be filled with steam to LOCA stove, measure the temperature of LOCA stove, control the aperture of steam regulating valve;
Measure the pressure of LOCA stove, for controlling the aperture of valve of the valve of compressed air inlet and the valve of upper evacuation port and lower evacuation port; It should be noted that, the technique mouth of pipe of the LOCA stove that the present embodiment provides comprises the interface of the various measuring instruments for measuring LOCA stove space temperature, pressure and liquid level, pass through temperature measuring set, the parameter recording, control the aperture of quick-opening valve and variable valve, the valve opening of evacuation port and lower evacuation port and compressed air inlet in the parameter control obtaining by pressure-measuring device.
The thermally-stabilised stage continues 12 minutes.
Stage 4 shown in Fig. 5 is nature cooling stage, is specially:
Close the steam inlet total valve of LOCA stove, close admission valve and the outlet valve of drum, make LOCA stove naturally cooling;
Stage 5 shown in Fig. 5 is the thermally-stabilised stage, is specially:
Space temperature in LOCA stove drops to predetermined temperature value, for example, 50 DEG C time, start the electric heater on LOCA stove, maintains space temperature in LOCA stove at 48 DEG C-52 DEG C, maintains 24 hours.
Stage 6 shown in Fig. 5 is thermal shock for the second time and spraying cooling stage, is specially:
Open the steam inlet total valve of LOCA stove to aperture 20%-50%, the pipeline of subtend LOCA stove input steam carries out heating coil;
Heating coil is complete, closes drum outlet, and to pouring steam in drum, making its temperature is 180 DEG C, and pressure is 1.0MPaa;
All open quick-opening valve and the variable valve at the steam inlet place of LOCA stove, to LOCA stove input steam, be rapidly heated so that LOCA furnace inner space temperature realizes;
Utilize upper evacuation port and the lower evacuation port of LOCA stove to regulate the pressure in LOCA stove;
At caloric impact temperature, to before peaking, the quick-opening valve in steam off exit, closes and closes evacuation port and lower evacuation port, enters the thermally-stabilised stage;
Utilize the variable valve of steam outlet to continue to pour steam to LOCA stove, measure the temperature of LOCA stove, control the aperture of steam regulating valve;
Measure the pressure of LOCA stove, for controlling the aperture of valve of the valve of compressed air inlet and the valve of upper evacuation port and lower evacuation port;
The thermally-stabilised stage continued for 200 seconds;
After 200 seconds, open the valve of chemical solution import, start spray pump, the valve of chemical solution outlet by the liquid level control in LOCA stove to keep LOCA furnace pressure and liquid level; , it should be noted that, in order to ensure to have in LOCA stove the chemical solution of certain volume, need to control by liquid level gauge the liquid level of chemical solution, the liquid level parameter obtaining by liquid level gauge, controls the valve opening that chemical solution exports.
The chemical solution of discharging in LOCA stove is got back to chemical solution storage tank after heat interchanger is cooling;
At the 200th second to 96 hours, the space temperature pressure in LOCA stove in accordance with regulations curve declined, and the space temperature in LOCA stove is by the variable valve control of steam outlet, and pressure is by compressed air inlet valve and upper exhaust-valve control.
Stage 7 shown in Fig. 5 is the thermally-stabilised stage, is specially:
Close spray pump, close chemical solution imported valve, continue with the space temperature to 100 DEG C in the variable valve control LOCA stove of steam outlet, pressure is adjusted to 0.2MPaa, keeps the 10 day time of this temperature and pressure.
Stage 8 shown in Fig. 5, for finishing experimental stage, is specially:
Steam off import total valve, opens evacuation port and lower evacuation port, so that LOCA furnace inner space temperature drops to normal temperature, makes its pressure drop to normal pressure, finishes test.
The method that the embodiment of the present invention provides, adopts PLC Automatic Control, and differential regulates, and valve is opened rapidly and timely adjustment, ensures that the thermal shock stage realizes in 30s at the appointed time, and temperature reaches 156 DEG C, and pressure reaches 0.56MPaa.
Referring to Fig. 6, for carry out the schematic flow sheet of embodiment of the method one of three generations's core one-level equipment performance test in the present invention in core one-level equipment performance test macro;
In conjunction with Fig. 3, illustrate the method for carrying out the test of three generations's core one-level equipment performance that the present embodiment provides, comprise the step of following generation test environment:
Step 200, i.e. first and second stage, warm-up phase;
Be specially: heat and maintain the temperature in LOCA stove;
Step 201, i.e. the phase III, thermal shock is implemented and the thermally-stabilised stage;
Be specially: open steam inlet total valve, saturated vapour is inputted to reheater, after reheater heating pressurization, input drum, after 3#LOCA stove is cooled to liquid by shower water, discharge; Stablize vapor (steam) temperature and the pressure of reheater outlet; The outlet of closing drum, is filled with steam to drum; Open quick-opening valve and the variable valve at the steam inlet place of the 1#LOCA stove of test use, regulate the pressure in 1#LOCA stove, before caloric impact temperature peak value arrives, close quick-opening valve and upper evacuation port and lower evacuation port, to continuing to fill steam in 1#LOCA stove, use the pressure in compressed air inlet and upper evacuation port and lower evacuation port control 1#LOCA stove by variable valve;
Step 202, i.e. fourth stage, natural cooling stage;
Be specially: close the steam inlet variable valve of 1#LOCA stove, the upper evacuation port of standard-sized sheet 1#LOCA stove and lower evacuation port, get rid of steam and steam condensate in 1#LOCA stove; It should be noted that upper evacuation port and lower emptying communicating also can be realized respectively emptying effect separately.
Step 203, i.e. five-stage, thermally-stabilised stage;
Be specially: when in 1#LOCA stove, temperature drops to predetermined temperature value, the electric heater starting on 1#LOCA stove heats the space temperature of 1#LOCA stove;
Step 204, i.e. the 6th stage, thermal shock for the second time and spraying cooling stage;
Be specially: the outlet temperature of preheating reheater, be filled with steam to drum, make the temperature and pressure in drum reach predetermined value.
Step 205, i.e. the 7th stage, thermally-stabilised stage;
Be specially: close the valve of spray pump and chemical solution import, regulate by the variable valve at steam inlet place the steam that enters 1#LOCA stove, control the temperature and pressure in 1#LOCA stove;
Step 206, i.e. the 8th stage, experiment ending phase;
Be specially: steam off import total valve, open evacuation port and lower evacuation port, so that 1#LOCA furnace inner space temperature drops to normal temperature, make its pressure drop to normal pressure.
Through the step of above-mentioned generation test environment, in LOCA stove, manufacture temperature, pressure, the corrosion environment of test core one-level equipment, can to being placed on, core one-level equipment in LOCA stove carries out temperature resistance resistance to compression and erosion-resisting performance is tested.
Implement method provided by the invention, solve the performance test under accident environmental baseline in containment of three generations's presurized water reactor unit core one-level equipment, and ensure that the thermal shock stage realizes the control accuracy of temperature and pressure at the appointed time, to reach the three generations's presurized water reactor unit core one-level equipment that meets international norm requirement in the parameter of accident environmental baseline test request.
Referring to Fig. 7, for carry out the schematic flow sheet of embodiment of the method two of three generations's core one-level equipment performance test in the present invention in core one-level equipment performance test macro;
In conjunction with Fig. 3, the method flow of the present embodiment is described;
Wherein, the stage 1-2 shown in Fig. 7 is warm-up phase, is specially:
Adopt the electric heater of LOCA stove to heat the space temperature to 50 DEG C in LOCA stove; In 24 hours, the space temperature of LOCA stove is maintained between 48 DEG C-52 DEG C.
Stage 3 shown in Fig. 7 implements and the thermally-stabilised stage for thermal shock, is specially:
Open steam inlet total valve to regulation aperture 20%-30%;
Saturated vapour enters reheater, after reheater heating, enters drum;
Steam in drum input 3#LOCA stove, through chemical solution escape hole discharges after being cooled to liquid by shower water;
When reheater steam exit temperature is stabilized to 280-300 DEG C, after pressure stability 1.0MPaa, close drum outlet, drum is filled with to steam, make the temperature in it arrive 280-300 DEG C, pressure is to 1.0MPaa;
All open quick-opening valve and the variable valve of the steam outlet of the 1#LOCA stove of test;
The valve control 1#LOCA furnace pressure of the valve of evacuation port and lower evacuation port in adjusting;
Before arriving the peak value of caloric impact temperature, the quick-opening valve in steam off exit, closes and closes the valve of evacuation port and the valve of lower evacuation port, enters the thermally-stabilised stage;
Variable valve by steam outlet continues to fill steam in 1#LOCA stove, 1#LOCA stove is carried out to temperature survey, with the control valve opening of temperature control steam outlet of measuring, the aperture of the valve of the valve of compressed air inlet and the valve of upper evacuation port and lower evacuation port is by the control of 1#LOCA furnace pressure;
The thermally-stabilised stage continues 12 minutes.
Stage 4 shown in Fig. 7 is nature cooling stage, is specially:
Close the variable valve at the steam inlet place of 1#LOCA stove, the valve of the upper evacuation port of standard-sized sheet 1#LOCA stove and the valve of lower evacuation port, discharge steam and steam condensate in 1#LOCA stove;
Close the power supply of reheater, close the variable valve of the steam outlet of 1#LOCA stove, open the quick-opening valve of steam outlet and the valve of chemical solution import of 3#LOCA stove, start the spray of 3#LOCA stove, the steam being heated by reheater is after 3#LOCA stove is cooling, emptying by evacuation port under 3#LOCA stove, until reheater outlet temperature drops to 200 DEG C;
Steam off import main valve, cuts out the steam inlet valve of reheater.
Stage 5 shown in Fig. 7 is the thermally-stabilised stage, is specially:
Space temperature in 1#LOCA stove drops to predetermined temperature value, for example, 50 DEG C time, start the electric heater on 1#LOCA stove, maintains space temperature in 1#LOCA stove at 48 DEG C-52 DEG C, maintains 24 hours.
Stage 6 shown in Fig. 7 is thermal shock for the second time and spraying cooling stage, is specially:
Preheating reheater outlet temperature is to 280-300 DEG C;
Drum is filled with to steam, implements the thermal shock to 1#LOCA stove;
In the time that the space temperature of 1#LOCA stove drops to 200 DEG C, close reheater power supply;
When reheater outlet temperature reaches 200 DEG C, open drum steam inlet, to close reheater steam and import and export, steam is directly filled with 1#LOCA stove by drum;
Open valve to regulation aperture, saturated vapour enters reheater, after reheater heating, enters drum;
Steam is emptying after 3#LOCA stove is cooled to liquid by shower water, when reheater outlet temperature is stabilized to 280-300 DEG C, after 1.0MPaa, closes drum outlet, and drum is filled to steam, makes temperature in it arrive 280-300 DEG C, and pressure is to 1.0MPaa.
Stage 7 shown in Fig. 7 is the thermally-stabilised stage, is specially:
Close spray pump, close chemical solution imported valve, continue with the space temperature to 100 DEG C in the variable valve control 1#LOCA stove of steam outlet, pressure is adjusted to 0.2MPaa, keeps the 10 day time of this temperature and pressure.
Stage 8 shown in Fig. 7, for finishing experimental stage, is specially:
Steam off import total valve, opens evacuation port and lower evacuation port, so that 1#LOCA furnace inner space temperature drops to normal temperature, makes its pressure drop to normal pressure, finishes test.
The method that the embodiment of the present invention provides, adopts PLC Automatic Control, and differential regulates, and valve is opened rapidly and timely adjustment, ensures that the thermal shock stage realizes in 19s at the appointed time, and temperature reaches 213 DEG C, and pressure reaches 0.45MPaa.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, can carry out the hardware that instruction is relevant by computer program to complete, program can be stored in computer read/write memory medium, this program, in the time carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Be more than the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (18)
1. a core one-level equipment performance test macro, is characterized in that, comprising:
LOCA stove, tests for the performance of the core one-level equipment to being placed therein;
Drum, for storing steam, and to described LOCA stove supply steam;
Wherein, described LOCA stove comprises main element, appurtenances and the attached technique mouth of pipe;
Described main element comprises: the cylindrical shell with certain enclosure space;
Described appurtenances comprise: for the electric heater that LOCA stove space is heated;
The attached technique mouth of pipe of described LOCA stove comprises: steam inlet, chemical solution import, chemical solution outlet, upper evacuation port, lower evacuation port, compressed air inlet; LOCA stove space temperature measurement instrument interface, pressure measuring instruments interface and level gauging instrument interface;
The chemical solution import of described LOCA stove is for inputting chemical solution to described LOCA stove, and described LOCA stove middle and lower part is also provided with the liquid level gauge being connected with described level gauging instrument interface, for measuring the liquid level of the chemical solution that enters described LOCA stove;
On the steam inlet of described LOCA stove, be provided with quick-opening valve parallel with one another and variable valve;
Wherein, in the thermal shock stage of performance test, described quick-opening valve and variable valve are for supplying with steam to control the space temperature of LOCA stove by supplying with/stop to described LOCA stove; Described quick-opening valve, variable valve and described upper evacuation port, lower evacuation port are for controlling in real time the pressure in described LOCA stove;
In non-thermal assault phase, described variable valve is supplied with steam to control the space temperature in LOCA stove for supplying with/stop to described LOCA stove; Described compressed air inlet is for adding pressurized air to control the pressure in described LOCA stove to described LOCA stove; Described upper evacuation port and lower evacuation port are for controlling the pressure in described LOCA stove.
2. the system as claimed in claim 1, is characterized in that, described system also comprises:
Chemical solution storage tank, for storing chemical liquid;
Spray pump, is connected with described chemical solution storage tank, for the chemical solution of described chemical solution storage tank is input to described LOCA stove from described chemical solution import;
Heat interchanger, cooling for the liquid that outlet is discharged through described chemical solution is carried out, and be input to described chemical solution storage tank and store.
3. system as claimed in claim 2, is characterized in that, when described system is used for testing three generations's core one-level equipment, also comprises:
Reheater, for by saturated vapour wherein of input heating pressurization, and is input to described drum and stores.
4. system as claimed in claim 2 or claim 3, is characterized in that, described LOCA stove is vertical LOCA stove, and the steam inlet of described LOCA stove comprises four point imports that arrange along described LOCA stove even circumferential; The temperature element that described temperature measuring instrument interface connects is arranged on the middle and upper part of described LOCA stove outside along the even circumferential of LOCA stove.
5. system as claimed in claim 2 or claim 3, is characterized in that, described LOCA stove is horizontal LOCA stove, and the steam inlet of described LOCA stove comprises four point imports that evenly arrange and be symmetrical in center line and the axis of described LOCA stove; The temperature element that described temperature measuring instrument interface connects is evenly arranged on described LOCA stove outside along the axis of LOCA stove.
6. a method of carrying out the core one-level equipment performance test of two generations in core one-level equipment performance test macro as claimed in claim 1, is characterized in that, comprises the step of following generation test environment:
In first and second stage, heat and maintain the temperature in described LOCA stove;
Phase III, the pipeline of LOCA stove input steam carries out, after heating coil, closing the outlet valve of described drum described in subtend, in drum, pours steam; Open quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, regulate the pressure in described LOCA stove, before caloric impact temperature peak value arrives, close described quick-opening valve and upper evacuation port and lower evacuation port, by variable valve to continuing to fill steam in LOCA stove, with the pressure in LOCA stove described in compressed air inlet and upper evacuation port and lower evacuation port control;
Fourth stage, closes the steam inlet total valve of LOCA stove, closes admission valve and the outlet valve of described drum, makes described LOCA stove naturally cooling;
Five-stage, in LOCA stove, when temperature decline predetermined temperature value, the electric heater starting on described LOCA stove heats the space temperature of its LOCA stove;
In the 6th stage, the pipeline of LOCA stove input steam carries out, after heating coil, closing the outlet valve of described drum described in subtend, in drum, pours steam; Open quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, regulate the pressure in described LOCA stove, before caloric impact temperature peak value arrives, close described quick-opening valve and upper evacuation port and lower evacuation port, by variable valve to continuing to fill steam in LOCA stove, with the pressure in LOCA stove described in compressed air inlet and upper evacuation port and lower evacuation port control; Open the valve of described chemical solution import, start spray pump, produce shower water and enter described LOCA stove from described chemical solution inflow point, the steam in described LOCA stove is cooled to liquid by shower water, discharges through chemical solution outlet;
The 7th stage, close the valve of spray pump and chemical solution import, regulate by the variable valve at steam inlet place the steam that enters LOCA stove, control the temperature and pressure in described LOCA stove;
The 8th stage, close described steam inlet total valve, open described upper evacuation port and lower evacuation port, so that described LOCA furnace inner space temperature drops to normal temperature, make its pressure drop to normal pressure.
7. method as claimed in claim 6, is characterized in that, described first and second stage comprises:
Adopt the electric heater of LOCA stove to heat the space temperature to 50 DEG C in LOCA stove; In 24 hours, the space temperature of LOCA stove is maintained between 48 DEG C-52 DEG C.
8. method as claimed in claim 7, is characterized in that, the described phase III comprises:
Open the steam inlet total valve of described LOCA stove to aperture 20%-50%, the pipeline of LOCA stove input steam carries out heating coil described in subtend;
Heating coil is complete, closes drum outlet, and to pouring steam in drum, making its temperature is 180 DEG C, and pressure is 1.0MPaa;
All open quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, to described LOCA stove input steam, be rapidly heated so that described LOCA furnace inner space temperature realizes;
Utilize upper evacuation port and the lower evacuation port of described LOCA stove to regulate the pressure in described LOCA stove;
At caloric impact temperature, to before peaking, the quick-opening valve in steam off exit, closes and closes evacuation port and lower evacuation port, enters the thermally-stabilised stage;
Utilize the variable valve of described steam outlet to continue to pour steam to described LOCA stove, measure the temperature of described LOCA stove, control the aperture of described steam regulating valve;
Measure the pressure of described LOCA stove, for controlling the aperture of valve of the valve of described compressed air inlet and the valve of upper evacuation port and lower evacuation port.
9. method as claimed in claim 8, is characterized in that, described five-stage comprises:
Space temperature in described LOCA stove drops to 50 DEG C, starts the electric heater on described LOCA stove, maintains space temperature in described LOCA stove at 48 DEG C-52 DEG C.
10. method as claimed in claim 9, is characterized in that, described the 6th stage comprises:
Open the steam inlet total valve of described LOCA stove to aperture 20%-50%, the pipeline of LOCA stove input steam carries out heating coil described in subtend;
Heating coil is complete, closes drum outlet, and to pouring steam in drum, making its temperature is 180 DEG C, and pressure is 1.0MPaa;
All open quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, to described LOCA stove input steam, be rapidly heated so that described LOCA furnace inner space temperature realizes;
Utilize upper evacuation port and the lower evacuation port of described LOCA stove to regulate the pressure in described LOCA stove;
At caloric impact temperature, to before peaking, the quick-opening valve in steam off exit, closes and closes evacuation port and lower evacuation port, enters the thermally-stabilised stage;
Utilize the variable valve of described steam outlet to continue to pour steam to described LOCA stove, measure the temperature of described LOCA stove, control the aperture of described steam regulating valve;
Measure the pressure of described LOCA stove, for controlling the aperture of valve of the valve of described compressed air inlet and the valve of upper evacuation port and lower evacuation port;
Open the valve of chemical solution import, start spray pump, the valve of chemical solution outlet by the liquid level control in LOCA stove to keep LOCA furnace pressure;
The chemical solution of discharging in LOCA stove is got back to chemical solution storage tank after heat interchanger is cooling;
When the space temperature pressure in LOCA stove in accordance with regulations curve decline time, the space temperature in LOCA stove is by the variable valve control of steam outlet, pressure is by compressed air inlet valve and upper exhaust-valve control.
11. methods as described in any one in claim 6-10, is characterized in that, described the 7th stage comprises:
Close spray pump, close chemical solution imported valve, continue with the space temperature to 100 DEG C in the variable valve control LOCA stove of steam outlet, pressure is adjusted to 0.2MPaa.
12. 1 kinds are carried out the method for three generations's core one-level equipment performance test in core one-level equipment performance test macro as claimed in claim 1, it is characterized in that, comprise the step of following generation test environment:
In first and second stage, heat and maintain the temperature in described LOCA stove;
Phase III, open described steam inlet total valve saturated vapour is inputted to reheater, after reheater heating pressurization, input drum, after being cooled to liquid by shower water, described LOCA stove discharges; Stablize vapor (steam) temperature and the pressure of reheater outlet; Close the outlet of drum, drum is poured to steam; Open quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, regulate the pressure in described LOCA stove, before caloric impact temperature peak value arrives, close described quick-opening valve and upper evacuation port and lower evacuation port, by variable valve to continuing to fill steam in LOCA stove, with the pressure in LOCA stove described in compressed air inlet and upper evacuation port and lower evacuation port control;
Fourth stage, closes the steam inlet variable valve of LOCA stove, and the upper evacuation port of standard-sized sheet LOCA stove and lower evacuation port are got rid of steam and steam condensate in LOCA stove;
Five-stage, when in LOCA stove, temperature drops to predetermined temperature value, the electric heater starting on described LOCA stove heats the space temperature of its LOCA stove;
In the 6th stage, the outlet temperature of reheater, is filled with steam to described drum described in preheating, makes the temperature and pressure in described drum reach predetermined value;
The 7th stage, close the valve of spray pump and chemical solution import, regulate by the variable valve at steam inlet place the steam that enters LOCA stove, control the temperature and pressure in described LOCA stove;
The 8th stage, close described steam inlet total valve, open described upper evacuation port and lower evacuation port, so that described LOCA furnace inner space temperature drops to normal temperature, make its pressure drop to normal pressure.
13. methods as claimed in claim 12, is characterized in that, described first and second stage comprises:
Adopt the electric heater of LOCA stove to heat the space temperature to 50 DEG C in LOCA stove; In 24 hours, the space temperature of LOCA stove is maintained between 48 DEG C-52 DEG C.
14. methods as claimed in claim 13, is characterized in that, the described phase III comprises:
Open steam inlet total valve to regulation aperture 20%-30%;
Saturated vapour enters reheater, after reheater heating, enters drum;
Steam in drum input LOCA stove, through chemical solution escape hole discharges after being cooled to liquid by shower water;
When reheater steam exit temperature is stabilized to 280-300 DEG C, after pressure stability 1.0MPaa, close drum outlet, drum is filled with to steam, make the temperature in it arrive 280-300 DEG C, pressure is to 1.0MPaa;
All open quick-opening valve and the variable valve of the steam outlet of the LOCA stove of test;
The valve control LOCA furnace pressure of the valve of evacuation port and lower evacuation port in adjusting;
Before arriving the peak value of caloric impact temperature, the quick-opening valve in steam off exit, closes and closes the valve of evacuation port and the valve of lower evacuation port, enters the thermally-stabilised stage;
In LOCA stove, continue to fill steam with the variable valve of steam outlet, LOCA stove is carried out to temperature survey, with the control valve opening of temperature control steam outlet of measuring, the aperture of the valve of the valve of compressed air inlet and the valve of upper evacuation port and lower evacuation port is by the control of LOCA furnace pressure.
15. methods as claimed in claim 14, is characterized in that, described fourth stage comprises:
Close the variable valve at the steam inlet place of LOCA stove, the valve of the upper evacuation port of standard-sized sheet LOCA stove and the valve of lower evacuation port, discharge steam and steam condensate in LOCA stove;
Close the power supply of reheater, close the variable valve of the steam outlet of LOCA stove, open the quick-opening valve of steam outlet and the valve of chemical solution import of LOCA stove for subsequent use, start the spray of LOCA stove for subsequent use, the steam being heated by reheater is after LOCA stove for subsequent use is cooling, emptying by evacuation port under LOCA stove for subsequent use, until reheater outlet temperature drops to 200 DEG C;
Steam off import main valve, cuts out the steam inlet valve of reheater.
16. methods as claimed in claim 15, is characterized in that, described five-stage comprises:
Space temperature in described LOCA stove drops to 50 DEG C, starts the electric heater on described LOCA stove, maintains space temperature in described LOCA stove at 48 DEG C-52 DEG C.
17. methods as claimed in claim 16, is characterized in that, described the 6th stage comprises:
First preheating reheater outlet temperature is to 280-300 DEG C;
Drum is filled with to steam, implements the thermal shock to LOCA stove;
In the time that the space temperature of LOCA stove drops to 200 DEG C, close reheater power supply;
When reheater outlet temperature reaches 200 DEG C, open drum steam inlet, to close reheater steam and import and export, steam is directly filled with LOCA stove by drum;
Open valve to regulation aperture, saturated vapour enters reheater, after reheater heating, enters drum;
Steam is emptying after described LOCA stove is cooled to liquid by shower water, when reheater outlet temperature is stabilized to 280-300 DEG C, after 1.0MPaa, closes drum outlet, and drum is filled to steam, makes temperature in it arrive 280-300 DEG C, and pressure is to 1.0MPaa.
18. methods as described in any one in claim 12-17, is characterized in that, described the 7th stage comprises:
Close spray pump, close chemical solution imported valve, continue with the space temperature to 100 DEG C in the variable valve control LOCA stove of steam outlet, pressure is adjusted to 0.2MPaa.
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| CN104269196B (en) * | 2014-08-27 | 2017-01-11 | 上海发电设备成套设计研究院 | Device and method for carrying out tests for stimulating environment in high energy pipeline rupture accident in nuclear power plant |
| CN105892515A (en) * | 2016-05-25 | 2016-08-24 | 国核工程有限公司 | Safety shell test pressure control system and control method thereof |
| CN109857164B (en) * | 2017-11-30 | 2022-04-26 | 福建宁德核电有限公司 | Spent fuel pool liquid level monitoring system calibration platform and calibration method |
| CN111627577B (en) * | 2020-06-05 | 2022-02-22 | 中国核动力研究设计院 | Test system and test method for performance evaluation of active equipment in accident environment |
| CN114414277B (en) * | 2022-01-13 | 2023-11-24 | 上海发电设备成套设计研究院有限责任公司 | Immersion test system device and test method |
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Address after: 518000 Guangdong province Futian District Shangbu Road West of the city of Shenzhen Shenzhen science and technology building 15 layer (1502-1504, 1506) Patentee after: CHINA NUCLEAR POWER TECHNOLOGY RESEARCH INSTITUTE Patentee after: China General Nuclear Power Corporation Address before: 518000 Guangdong city of Shenzhen province Futian District science and technology building, Shangbu Road 15 Patentee before: Zhongkehua Nuclear Power Technology Institute Co., Ltd. Patentee before: China Guangdong Nuclear Power Group Co., Ltd. |