CN102054537A - 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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- CN102054537A CN102054537A CN2009101096392A CN200910109639A CN102054537A CN 102054537 A CN102054537 A CN 102054537A CN 2009101096392 A CN2009101096392 A CN 2009101096392A CN 200910109639 A CN200910109639 A CN 200910109639A CN 102054537 A CN102054537 A CN 102054537A
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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
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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 the nuclear power technology field, relate in particular to a kind of nuclear one-level equipment performance test macro and method.
Background technology
The nuclear safety codes requirement; for guaranteeing nuclear power station at normal operating condition, energy safe operation under the operating mode after accident conditions and the 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.Therefore at the nuclear one-level nuclear power generating equipment in the containment, they must keep normal trouble free service function during the coolant loss accident He after the accident, carry out in the simulating Safety shell during the accident very necessity of heat power and electrochemical conditions performance test down.The core of this experiment is: the simulation of operating mode harsh and unforgiving environments operating mode during the accident and after the accident in the containment, and tested equipment specific function is investigated device.The simulation of operating mode harsh and unforgiving environments operating mode after accident and the accident realizes specific temperature and pressure exactly in the containment, and chemical environment.
Prior art provides the performance test stand of examining one-level equipment in a kind of containment under the accident environmental baseline, and its thermal technology and chemical environment are to realize that in test cabin (hereinafter to be referred as the LOCA stove) its volume is 2.48m3 to the maximum.Obviously, the LOCA furnace volume limits the scope of tested equipment, because the LOCA furnace volume is too little, much examines one-level equipment and can not carry out accident environmental performance test in the containment.And can't reach at the appointed time two generation unit the temperature that requires of thermal shock, can not guarantee that in the thermal shock stage temperature evenly distributes, 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 design of the performance test system of existing nuclear one-level equipment, this system can not satisfy 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 nuclear one-level equipment performance tests under the accident environmental baseline in containment, and guarantee that the thermal shock stage realizes the control accuracy with temperature, pressure at the appointed time, with reach the three generations that meets the international norm requirement and two generation presurized water reactor unit nuclear 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 invention provides a kind of nuclear one-level equipment performance test macro, comprising:
The LOCA stove is used for the performance that is positioned over nuclear one-level equipment is wherein tested;
Drum is used to store steam, and to described LOCA stove supply steam;
Wherein, described LOCA stove comprises main element, appurtenances and the attached technology mouth of pipe;
Described main element comprises: the cylindrical shell with certain enclosure space;
Described appurtenances comprise: be used for electric heater that LOCA stove space is heated;
The attached technology mouth of pipe of described LOCA stove comprises: steam inlet, chemical solution import, chemical solution export, go up evacuation port, following 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 used for to described LOCA stove input chemical solution, and described LOCA stove middle and lower part also is provided with the liquid level gauge that is connected with described level gauging instrument interface, is used to measure the liquid level of the chemical solution that enters described LOCA stove;
The steam inlet of described LOCA stove is 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 used 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 upward evacuation port, following evacuation port are used for controlling in real time the pressure in the described LOCA stove;
In the non-thermal shock stage, described variable valve is used for supplying with/stopping to described LOCA stove supplying with steam with the space temperature in the control LOCA stove; Described compressed air inlet is used for adding pressurized air to control the pressure in the described LOCA stove to described LOCA stove; The described evacuation port of going up is used to control the interior pressure of described LOCA stove with following evacuation port.
The embodiment of the invention also provides a kind of method of carrying out the nuclear one-level equipment performance test of two generations in nuclear one-level equipment performance test macro, comprising:
In first and second stage, heat and keep temperature in the described LOCA stove;
Phase III, after the pipeline of the described LOCA stove input of subtend steam carries out heating coil, close the outlet valve of described drum, in drum, pour steam; Open the quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, regulate the pressure in the described LOCA stove, before the caloric impact temperature peak value arrives, close described quick-opening valve and last evacuation port and following evacuation port, to continuing to fill steam in the LOCA stove, control the interior pressure of described LOCA stove with following evacuation port by variable valve with compressed air inlet and last evacuation port;
The quadravalence section is closed the steam inlet total valve of LOCA stove, closes the admission valve and the outlet valve of described drum, makes described LOCA stove natural cooling;
Five-stage, when temperature dropped to predetermined temperature value in the LOCA stove, the electric heater that starts on the described LOCA stove heated the space temperature of its LOCA stove;
The 6th stage, after the pipeline of the described LOCA stove input of subtend steam carries out heating coil, close the outlet valve of described drum, in drum, charge into steam; Open the quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, regulate the pressure in the described LOCA stove, before the caloric impact temperature peak value arrives, close described quick-opening valve and last evacuation port and following evacuation port, to continuing to fill steam in the LOCA stove, control the interior pressure of described LOCA stove with following evacuation port by variable valve with compressed air inlet and last evacuation port; 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 the described LOCA stove is cooled to liquid by shower water, discharges through the chemical solution outlet.
The 7th stage, close the valve of spray pump and chemical solution import, regulate the steam that enters the LOCA stove by the variable valve at steam inlet place, control the temperature and pressure in the described LOCA stove;
The 8th stage, close described steam inlet total valve, open described evacuation port and the following evacuation port gone up, so that described LOCA furnace inner space temperature drops to normal temperature, make its pressure drop to normal pressure.
Accordingly, the embodiment of the invention also provides a kind of and carried out the method that the three generations examines the test of one-level equipment performance in nuclear one-level equipment performance test macro, it is characterized in that, comprising:
In first and second stage, heat and keep temperature in the described LOCA stove;
Phase III, open described steam inlet total valve saturated vapour is imported reheater, through importing drum after the reheater heating and pressurizing, after being cooled to liquid by shower water, described LOCA stove discharges; Stablize the vapor (steam) temperature and the pressure of reheater outlet; Close the outlet of drum, drum is poured steam; Open the quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, regulate the pressure in the described LOCA stove, before the caloric impact temperature peak value arrives, close described quick-opening valve and last evacuation port and following evacuation port, to continuing to fill steam in the LOCA stove, control the interior pressure of described LOCA stove with following evacuation port by variable valve with compressed air inlet and last evacuation port;
The quadravalence section is closed the steam inlet total valve of LOCA stove, closes the admission valve and the outlet valve of described drum, makes described LOCA stove natural cooling;
Five-stage, when temperature dropped to predetermined temperature value in the LOCA stove, the electric heater that starts on the described LOCA stove heated the space temperature of its LOCA stove;
In the 6th stage, the outlet temperature of the described reheater of preheating pours steam to described drum, makes the temperature and pressure in the described drum reach predetermined value;
The 7th stage, close the valve of spray pump and chemical solution import, regulate the steam that enters the LOCA stove by the variable valve at steam inlet place, control the temperature and pressure in the described LOCA stove;
The 8th stage, close described steam inlet total valve, open described evacuation port and the following evacuation port gone up, 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 invention provides, can realize temperature and pressure control in the LOCA stove simultaneously, and the steam flow and the regulating power that strengthen, make this nuclear one-level equipment performance test macro reach thermal shock requirement, other stages and the thermally-stabilised phase temperature pressure controling precision height of two generations and the test of three generations's unit.And temperature and pressure is realized evenly distributing in the LOCA stove, guarantees that tested nuclear one-level equipment bears the temperature, pressure of regulation, guarantees that experiment is accurately reliable.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of structural representation of examining one-level equipment performance test macro embodiment one among the present invention;
Fig. 2 is a kind of structural representation of examining one-level equipment performance test macro embodiment two among the present invention;
Fig. 3 is a kind of structural representation of examining one-level equipment performance test macro embodiment three among the present invention;
Fig. 4 is the schematic flow sheet that carries out the method embodiment one of two generations nuclear one-level equipment performance test among the present invention in nuclear one-level equipment performance test macro;
Fig. 5 is the schematic flow sheet that carries out the method embodiment two of two generations nuclear one-level equipment performance test among the present invention in nuclear one-level equipment performance test macro;
Fig. 6 carries out the schematic flow sheet that the three generations examines the method embodiment one of one-level equipment performance test among the present invention in nuclear one-level equipment performance test macro;
Fig. 7 carries out the schematic flow sheet that the three generations examines the method embodiment two of one-level equipment performance test among the present invention in nuclear one-level equipment performance test macro.
Embodiment
The present invention is directed to above-mentioned the deficiencies in the prior art, a kind of nuclear one-level equipment performance test macro and method are provided, the technical scheme that the embodiment of the invention provides, realize temperature and pressure control in the LOCA stove simultaneously, and the steam flow and the regulating power that strengthen, make this nuclear one-level equipment performance test macro reach thermal shock requirement, other stages and the thermally-stabilised phase temperature pressure controling precision height of two generations and the test of three generations's unit.And temperature and pressure is realized evenly distributing in the LOCA stove, guarantees that tested nuclear one-level equipment bears the temperature, pressure of regulation, guarantees that experiment is accurately reliable.
Referring to Fig. 1, be a kind of structural representation of examining one-level equipment performance test macro embodiment one among the present invention;
The nuclear one-level equipment performance test macro that present embodiment provides comprises:
LOCA stove 2 is used for the performance that is positioned over nuclear one-level equipment is wherein tested;
The attached technology mouth of pipe of LOCA stove 2 comprises: steam inlet 21, chemical solution import 22, chemical solution outlet 23, go up evacuation port 24, evacuation port 25, compressed air inlet 26 and be used to measure LOCA stove space temperature measurement instrument interface, pressure measuring instruments interface and level gauging instrument interface (figure does not show) down;
The chemical solution import 22 of described LOCA stove 2 is used for to described LOCA2 stove input chemical solution, described LOCA stove 2 middle and lower parts also are provided with the liquid level gauge that is connected with described level gauging instrument interface, are used for measuring the liquid level of the chemical solution that enters described LOCA stove 2; When the liquid level of the chemical solution in the described LOCA stove 2 surpasses 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 LOCA stove 2 and are entered the space temperature of LOCA stove 2 with control, quick-opening valve 210 and variable valve 211 and go up evacuation port 24 and following evacuation port 25 is used for controlling in real time the interior pressure of LOCA stove 2; In the non-thermal shock stage, variable valve 211 is supplied with steam to control the space temperature in the LOCA stove 2, the pressurized air that air compressor machine produces adds pressurized air or controls in the LOCA stoves 2 by last evacuation port 24 and following evacuation port 25 by compressed air inlet 26 in LOCA stove 2 pressure to LOCA stove 2;
Need to prove that the volume of LOCA stove provided by the invention is greater than 2.48m
3, can satisfy test needs to large-scale nuclear one-level functions of the equipments.
A kind of nuclear one-level equipment performance test macro that the embodiment of the invention provides, owing to adopt large-scale LOCA stove, and can accurately simulate the LOCA furnace temperature, pressure, and corrosion environment, can solve the three generations and two generation presurized water reactor unit nuclear one-level equipment in containment during the accident and the performance test under the post accident environment condition, and guarantee that the thermal shock stage realizes the control accuracy of temperature and pressure at the appointed time, with reach the three generations that meets the international norm requirement and two generation presurized water reactor unit nuclear one-level equipment during accident and the parameter that requires of post accident environment condition test.
Referring to Fig. 2, be a kind of structural representation of examining one-level equipment performance test macro embodiment two among the present invention;
The nuclear one-level equipment performance test macro that present embodiment provides comprises each ingredient of the system that embodiment one provides, and different is that the nuclear one-level equipment performance test macro that present embodiment provides also comprises:
Chemical solution storage tank 5 is used for storage of chemical liquid;
Heat interchanger 4 is used for and will cools off through the liquid that described chemical solution outlet 23 is discharged, and be input to described chemical solution storage tank 5 again and store, so that nuclear one-level equipment is carried out performance test, can be recycling.The chilled water of described heat interchanger 4 is supplied with by cooling water pipeline, this cooling water pipeline is provided with the cooling water inlet valve, when the cooling water inlet valve is opened, chilled water enters heat interchanger 4 by pipeline from the cooling water inlet on the heat interchanger, and discharge by coolant outlet, in addition, chilled water can also be input to chemical solution storage tank 5, is used to regulate the concentration of described chemical solution wherein.
Optionally, the LOCA stove 2 in the present embodiment also comprises sewage draining exit, is used under special circumstances, do emptying when handling the LOCA stove, by this sewage draining exit the residual liquid of testing usefulness in the LOCA stove is discharged to sewage treatment plant and handles.
Implement system provided by the invention, three generations and two generation presurized water reactor unit nuclear one-level equipment performance tests under the accident environmental baseline in containment have been solved, and guarantee that the thermal shock stage realizes the control accuracy with temperature, pressure at the appointed time, with reach the three generations that meets the international norm requirement and two generation presurized water reactor unit nuclear one-level equipment in the parameter of accident environmental baseline test request.
In the present embodiment, for nuclear one-level equipment is carried out performance test, mainly utilize 180 ℃ in certain power station, the auxiliary steam of 1MPaa, realize during the interior accident of containment and environment temperature and pressure condition after the accident, for guaranteeing the nuclear 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 for satisfying the needs of different IPs level equipment:
Table 1
Need to prove that in each embodiment of nuclear one-level equipment performance test macro provided by the invention, system comprises the LOCA stove of a test usefulness at least, but does not get rid of the situation that comprises a plurality of LOCA stoves.
Referring to Fig. 2, a kind of embodiment that examines one-level equipment performance test macro at test two generations presurized water reactor unit nuclear one-level equipment among the present invention is described equally.
The technology mouth of pipe of the LOCA stove that present embodiment provides also comprises the interface (figure does not show) of the various measuring instruments that are used to measure LOCA stove space temperature, pressure and liquid level, steam enters in the LOCA stove 2 after by drum 1, in the different tests stage, the steam flow difference, LOCA stove 2 steam inlets 21 places are provided with quick-opening valve 210 and variable valve 211 in parallel, at thermal shock stage quick-opening valve 210 and 211 while of variable valve standard-sized sheet, satisfy the needs that are rapidly heated, little in other stage steam requirements, supply with steam with variable valve 211.
Space temperature is controlled by the variable valve 211 and the quick-opening valve 210 at steam regulation import 21 places in the LOCA stove 2.
Also be provided with the measuring instrument of gaging pressure on the LOCA stove, according to the pressure number of degrees that show on the pressure-measuring device, the valve opening of evacuation port, following evacuation port, compressed air inlet in the control.
In the thermal shock stage, LOCA stove 2 space pressure are by the quick-opening valve 210 and the variable valve 211 at steam inlet 21 places, and realization is united in the control of the valve of the valve of the last evacuation port 24 of LOCA stove 2 and following evacuation port 25.
For the non-thermal shock stage, the control of LOCA stove 2 internal pressures, realize to LOCA stove 2 interpolation pressurized air or at last evacuation port 24 and the 25 enforcement emptyings of following evacuation port by compressed air inlet 26, when pressure higher, then open the valve row pressure of going up evacuation port 24 and following evacuation port 25, on the low side when pressure, add pressurized air to replenish the pressure in the LOCA stove 2 by compressed air inlet 26.Need to prove that the described evacuation port 24 of going up can communicate with each other with following evacuation port 25, also can carry out emptying respectively.
Need to prove that for guaranteeing in good time temperature control, overcome the departure that the intrinsic hysteresis quality of general industry temperature element causes, the embodiment of the invention adopts Millisecond reaction heat galvanic couple to measure the feedback space temperature in real time.When LOCA stove when being vertical, temperature element (and measure temperature measuring instrument) is evenly arranged in the space, middle and upper part of LOCA stove outside along the circumference of LOCA stove, and the interface by temperature measuring set obtains medial temperature that temperature element the records controlled variable as the steam regulating valve aperture.And even for guaranteeing temperature field and pressure field, 4 branch imports that steam is uniformly distributed along the circumference from LOCA furnace tube top enter the LOCA stove.
When LOCA stove when being horizontal, steam enters the LOCA stove from 4 branch 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, and the interface by temperature measuring set obtains medial temperature that temperature element the records controlled variable as the steam regulating valve aperture.
The thermal shock stage belongs to the interior temperature and pressure field of LOCA and presents the 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, exhaust-valve forces current downflow on the steam about opening simultaneously, guarantees that so simultaneously radial and axial temperature, pressure is evenly distributed.
The system that the embodiment of the invention provides adopts Automatic Control, and differential is regulated, and valve is opened rapidly and timely adjustment, and the assurance thermal shock stage is realized the control accuracy of temperature and pressure at the appointed time.
Referring to Fig. 3, be a kind of structural representation of examining one-level equipment performance test macro embodiment three among the present invention.
In the present embodiment, the Performance Test System that is primarily aimed at three generations's presurized water reactor unit nuclear one-level equipment describes.
As shown in Figure 3, three generations's presurized water reactor unit nuclear one-level equipment is carried out performance test, native system except comprise with above-mentioned two generation presurized water reactor unit nuclear one-level equipment performance test macro 26S Proteasome Structure and Function, also comprise and need reheater 6, it is used for input saturated vapour heating and pressurizing 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℃ |
Performance test at three generations's presurized water reactor unit nuclear one-level equipment, saturated vapour is introduced into reheater 6, and these reheater 6 heating steams are heated to 280-300 ℃, pressure 0.9-1MPaa, and the steam after the heating and pressurizing is input to drum 1 stores, again by in the drum 1 input LOCA stove 2.
The function of the miscellaneous part in the present embodiment and effect and embodiment one are similar, repeat no more, different is, in the system that present embodiment provides, comprise two LOCA stoves, wherein, the 3#LOCA stove is the stand-by equipment of 1#LOCA stove, the 1#LOCA stove is a LOCA stove of examining one-level equipment performance test usefulness, and its function and effect will be described in detail in the performance test methods embodiment two that carries out three generations's presurized water reactor unit nuclear one-level equipment in nuclear one-level equipment performance test macro.
The system that the embodiment of the invention provides adopts the PLC Automatic Control, and differential is regulated, and valve is opened rapidly and timely adjustment, and the assurance thermal shock stage is realized the control accuracy with temperature, pressure at the appointed time.
Referring to Fig. 4, in nuclear one-level equipment performance test macro, carrying out the schematic flow sheet of the method embodiment one of two generations nuclear one-level equipment performance test among the present invention.
The method of carrying out the nuclear one-level equipment performance test of two generations that present embodiment provides mainly comprises the step that generates test environment:
Be specially: heat and keep temperature in the LOCA stove;
Be specially: after the pipeline of subtend LOCA stove input steam carries out heating coil, close the outlet valve of drum, in drum, pour steam; Open the quick-opening valve and the variable valve at the steam inlet place of LOCA stove, regulate the pressure in the LOCA stove, before the caloric impact temperature peak value arrives, close quick-opening valve and last evacuation port and following evacuation port, to continuing to fill steam in the LOCA stove, control the interior pressure of LOCA stove with following evacuation port by variable valve with compressed air inlet and last evacuation port; Need to prove, the technology mouth of pipe of the LOCA stove that present embodiment provides comprises the interface of the various measuring instruments that are used to measure LOCA stove space temperature, pressure and liquid level, pass through temperature measuring set, the parameter that records, the aperture of control quick-opening valve and variable valve is controlled the valve opening that goes up evacuation port and following evacuation port and compressed air inlet by the parameter that pressure-measuring device obtains.
Be specially: close the steam inlet total valve of LOCA stove, close the admission valve and the outlet valve of drum, make LOCA stove natural cooling;
Be specially: when temperature dropped to predetermined temperature value in the LOCA stove, the electric heater on the startup LOCA stove heated the space temperature of its LOCA stove;
Be specially: after the pipeline of subtend LOCA stove input steam carries out heating coil, close the outlet valve of drum, in drum, pour steam; Open the quick-opening valve and the variable valve at the steam inlet place of LOCA stove, regulate the pressure in the LOCA stove, before the caloric impact temperature peak value arrives, close quick-opening valve and last evacuation port and following evacuation port, to continuing to fill steam in the LOCA stove, control the interior pressure of LOCA stove with following evacuation port by variable valve with compressed air inlet and last evacuation port; Open the valve of chemical solution import, start spray pump, produce shower water and enter the LOCA stove from chemical solution inflow point, steam in the LOCA stove is cooled to liquid by shower water, discharges through the chemical solution outlet, need to prove, in order to guarantee to have in the LOCA stove chemical solution of certain volume, need control the liquid level of chemical solution by liquid level gauge, by the liquid level parameter that liquid level gauge obtains, the valve opening of control chemical solution outlet.
Be specially: close the valve of spray pump and chemical solution import, regulate the steam that enters the LOCA stove, the temperature and pressure in the control LOCA stove by the variable valve at steam inlet place;
Step 106 i.e. the 8th stage, is tested ending phase;
Be specially: steam off import total valve, open evacuation port and following 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 the LOCA stove, made temperature, pressure, the corrosion environment of test nuclear one-level equipment, can carry out the temperature resistance resistance to compression and erosion-resisting performance is tested to the nuclear one-level equipment in the LOCA stove of being placed on.
Implement method provided by the invention, three generations and two generation presurized water reactor unit nuclear one-level equipment performance tests under the accident environmental baseline in containment have been solved, and guarantee that the thermal shock stage realizes the control accuracy of temperature and pressure at the appointed time, with reach the three generations that meets the international norm requirement and two generation presurized water reactor unit nuclear one-level equipment in the parameter of accident environmental baseline test request.
Referring to Fig. 5, in nuclear one-level equipment performance test macro, carrying out the schematic flow sheet of the method embodiment two of two generations nuclear one-level equipment performance test among the present invention;
Wherein, the stage 1-2 shown in Fig. 5 is a warm-up phase, is specially:
Adopt the space temperature to 50 ℃ in the electric heater heating LOCA stove of LOCA stove; In 24 hours, the space temperature of LOCA stove is maintained between 48 ℃-52 ℃.
The steam inlet total valve of opening the LOCA stove is to aperture 20%-50%, and the pipeline of subtend LOCA stove input steam carries out heating coil;
Heating coil finishes, and closes the drum outlet, and to pouring steam in the drum, making its temperature is 180 ℃, and pressure is 1.0MPaa;
All open the quick-opening valve and the variable valve at the steam inlet place of LOCA stove, to LOCA stove input steam, so that LOCA furnace inner space temperature realizes being rapidly heated;
Utilize the last evacuation port and the following evacuation port of LOCA stove to regulate the interior pressure of LOCA stove;
Before the peaking, the quick-opening valve in steam off exit closes and closes evacuation port and following evacuation port, enters the thermally-stabilised stage at caloric impact temperature;
Utilize the variable valve of steam outlet to continue to charge into steam, measure the temperature of LOCA stove, the aperture of control steam regulating valve to the LOCA stove;
Measure the pressure of LOCA stove, be used to control the aperture of the valve of the valve of the valve of compressed air inlet and last evacuation port and following evacuation port; Need to prove, the technology mouth of pipe of the LOCA stove that present embodiment provides comprises the interface of the various measuring instruments that are used to measure LOCA stove space temperature, pressure and liquid level, pass through temperature measuring set, the parameter that records, the aperture of control quick-opening valve and variable valve is controlled the valve opening that goes up evacuation port and following evacuation port and compressed air inlet by the parameter that pressure-measuring device obtains.
The thermally-stabilised stage continues 12 minutes.
Stage 4 shown in Fig. 5 is the natural cooling stage, is specially:
Close the steam inlet total valve of LOCA stove, close the admission valve and the outlet valve of drum, make LOCA stove natural cooling;
Space temperature in the LOCA stove drops to predetermined temperature value, for example 50 ℃ the time, starts the electric heater on the LOCA stove, keeps space temperature in the LOCA stove at 48 ℃-52 ℃, keeps 24 hours.
The steam inlet total valve of opening the LOCA stove is to aperture 20%-50%, and the pipeline of subtend LOCA stove input steam carries out heating coil;
Heating coil finishes, and closes the drum outlet, and to pouring steam in the drum, making its temperature is 180 ℃, and pressure is 1.0MPaa;
All open the quick-opening valve and the variable valve at the steam inlet place of LOCA stove, to LOCA stove input steam, so that LOCA furnace inner space temperature realizes being rapidly heated;
Utilize the last evacuation port and the following evacuation port of LOCA stove to regulate the interior pressure of LOCA stove;
Before the peaking, the quick-opening valve in steam off exit closes and closes evacuation port and following evacuation port, enters the thermally-stabilised stage at caloric impact temperature;
Utilize the variable valve of steam outlet to continue to pour steam, measure the temperature of LOCA stove, the aperture of control steam regulating valve to the LOCA stove;
Measure the pressure of LOCA stove, be used to control the aperture of the valve of the valve of the valve of compressed air inlet and last evacuation port and following 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 is controlled to keep LOCA furnace pressure and liquid level by the liquid level in the LOCA stove; , need to prove, in order to guarantee to have in the LOCA stove chemical solution of certain volume, need control the liquid level of chemical solution by liquid level gauge, by the liquid level parameter that liquid level gauge obtains, the valve opening of control chemical solution outlet.
The chemical solution of discharging in the LOCA stove is got back to the chemical solution storage tank after the heat interchanger cooling;
At the 200th second to 96 hours, the space temperature pressure in LOCA stove curve in accordance with regulations descended, and the space temperature in the LOCA stove is by the variable valve control of steam outlet, and pressure is by compressed air inlet valve and the control of last exhaust-valve.
Close spray pump, close the chemical solution imported valve, continue with the space temperature to 100 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.
Steam off import total valve is opened evacuation port and following 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 invention provides adopts the PLC Automatic Control, and differential is regulated, and valve is opened rapidly and timely adjustment, guarantees that the thermal shock stage realizes in the 30s at the appointed time, and temperature reaches 156 ℃, and pressure reaches 0.56MPaa.
Referring to Fig. 6, in nuclear one-level equipment performance test macro, carrying out the schematic flow sheet that the three generations examines the method embodiment one of one-level equipment performance test among the present invention;
In conjunction with Fig. 3, the three generations that carries out that specifying present embodiment provides examines the method that the one-level equipment performance is tested, and comprises the step of following generation test environment:
Step 200, i.e. first and second stage, warm-up phase;
Be specially: heat and keep temperature in the LOCA stove;
Step 201, i.e. the phase III, thermal shock is implemented and the thermally-stabilised stage;
Be specially: open the steam inlet total valve, saturated vapour is imported reheater,, after the 3#LOCA stove is cooled to liquid by shower water, discharge through importing drum after the reheater heating and pressurizing; Stablize the vapor (steam) temperature and the pressure of reheater outlet; Close the outlet of drum, drum is charged into steam; Open the quick-opening valve and the variable valve at the steam inlet place of the 1#LOCA stove of testing usefulness, regulate the pressure in the 1#LOCA stove, before the caloric impact temperature peak value arrives, close quick-opening valve and last evacuation port and following evacuation port, to continuing to fill steam in the 1#LOCA stove, control the interior pressure of 1#LOCA stove with following evacuation port by variable valve with compressed air inlet and last evacuation port;
Step 202, i.e. quadravalence section, natural cooling stage;
Be specially: close the steam inlet variable valve of 1#LOCA stove, the last evacuation port of standard-sized sheet 1#LOCA stove and following evacuation port are got rid of steam and steam condensate in the 1#LOCA stove; Need to prove that last evacuation port and following emptying communicate, and also can realize the effect of emptying separately respectively.
Step 203, i.e. five-stage, thermally-stabilised stage;
Be specially: when temperature dropped to predetermined temperature value in the 1#LOCA stove, the electric heater on the startup 1#LOCA stove heated 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, charge into steam to drum, make the temperature and pressure in the 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 the steam that enters the 1#LOCA stove, the temperature and pressure in the control 1#LOCA stove by the variable valve at steam inlet place;
Step 206 i.e. the 8th stage, is tested ending phase;
Be specially: steam off import total valve, open evacuation port and following 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 the LOCA stove, made temperature, pressure, the corrosion environment of test nuclear one-level equipment, can carry out the temperature resistance resistance to compression and erosion-resisting performance is tested to the nuclear one-level equipment in the LOCA stove of being placed on.
Implement method provided by the invention, solved the performance test under the accident environmental baseline in containment of three generations's presurized water reactor unit nuclear one-level equipment, and guarantee that the thermal shock stage realizes the control accuracy of temperature and pressure at the appointed time, to reach three generations's presurized water reactor unit nuclear one-level equipment of meeting the international norm requirement parameter at accident environmental baseline test request.
Referring to Fig. 7, in nuclear one-level equipment performance test macro, carrying out the schematic flow sheet that the three generations examines the method embodiment two of one-level equipment performance test among the present invention;
In conjunction with Fig. 3, the method flow of present embodiment is described;
Wherein, the stage 1-2 shown in Fig. 7 is a warm-up phase, is specially:
Adopt the space temperature to 50 ℃ in the electric heater heating LOCA stove of LOCA stove; In 24 hours, the space temperature of LOCA stove is maintained between 48 ℃-52 ℃.
Open the steam inlet total valve to regulation aperture 20%-30%;
Saturated vapour enters reheater, through entering drum after the reheater heating;
Steam in drum input 3#LOCA stove is discharged through the chemical solution escape hole after being cooled to liquid by shower water;
When the reheater steam exit temperature is stabilized to 280-300 ℃, behind the pressure stability 1.0MPaa, close the drum outlet, drum is charged into steam, make the temperature in it arrive 280-300 ℃, pressure is to 1.0MPaa;
All open the quick-opening valve and the variable valve of the steam outlet of the 1#LOCA stove of testing;
The valve of the valve of evacuation port and following evacuation port control 1#LOCA furnace pressure in the adjusting;
Before the peak value that arrives caloric impact temperature, the quick-opening valve in steam off exit closes and closes the valve of evacuation port and the valve of following evacuation port, enters the thermally-stabilised stage;
Variable valve by steam outlet continues to fill steam in the 1#LOCA stove, the 1#LOCA stove is carried out temperature survey, with the control valve opening of the temperature control steam outlet measured, the aperture of the valve of the valve of compressed air inlet and the valve of last evacuation port and following evacuation port is controlled by the 1#LOCA furnace pressure;
The thermally-stabilised stage continues 12 minutes.
Stage 4 shown in Fig. 7 is the natural cooling stage, is specially:
Close the variable valve at the steam inlet place of 1#LOCA stove, the valve of the last evacuation port of standard-sized sheet 1#LOCA stove and the valve of following evacuation port are discharged steam and steam condensate in the 1#LOCA stove;
Close the power supply of reheater, close the variable valve of the steam outlet of 1#LOCA stove, the quick-opening valve of the steam outlet of unlatching 3#LOCA stove and the valve of chemical solution import, start the spray of 3#LOCA stove, the steam that is heated by reheater is after the cooling of 3#LOCA stove, by evacuation port emptying under the 3#LOCA stove, drop to 200 ℃ until the reheater outlet temperature;
Steam off import main valve cuts out the steam inlet valve of reheater.
Space temperature in the 1#LOCA stove drops to predetermined temperature value, for example 50 ℃ the time, starts the electric heater on the 1#LOCA stove, keeps space temperature in the 1#LOCA stove at 48 ℃-52 ℃, keeps 24 hours.
Preheating reheater outlet temperature is to 280-300 ℃;
Drum is charged into steam, implement thermal shock the 1#LOCA stove;
When the space temperature of 1#LOCA stove drops to 200 ℃, close the reheater power supply;
When the reheater outlet temperature reaches 200 ℃, open the drum steam inlet, to close reheater steam and import and export, steam directly charges into the 1#LOCA stove by drum;
Open valve to the regulation aperture, saturated vapour enters reheater, through entering drum after the reheater heating;
Steam emptying after the 3#LOCA stove is cooled to liquid by shower water when the reheater outlet temperature is stabilized to 280-300 ℃, behind the 1.0MPaa, is closed the drum outlet, and drum is filled steam, makes its interior temperature to 280-300 ℃, and pressure is to 1.0MPaa.
Close spray pump, close the chemical solution imported valve, continue with the space temperature to 100 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.
Steam off import total valve is opened evacuation port and following 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 invention provides adopts the PLC Automatic Control, and differential is regulated, and valve is opened rapidly and timely adjustment, guarantees that the thermal shock stage realizes in the 19s at the appointed time, and temperature reaches 213 ℃, and pressure reaches 0.45MPaa.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
More than be preferred implementation of the present invention, should be pointed out that for those skilled in the art that under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (18)
1. a nuclear one-level equipment performance test macro is characterized in that, comprising:
The LOCA stove is used for the performance that is positioned over nuclear one-level equipment is wherein tested;
Drum is used to store steam, and to described LOCA stove supply steam;
Wherein, described LOCA stove comprises main element, appurtenances and the attached technology mouth of pipe;
Described main element comprises: the cylindrical shell with certain enclosure space;
Described appurtenances comprise: be used for electric heater that LOCA stove space is heated;
The attached technology mouth of pipe of described LOCA stove comprises: steam inlet, chemical solution import, chemical solution export, go up evacuation port, following 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 used for to described LOCA stove input chemical solution, and described LOCA stove middle and lower part also is provided with the liquid level gauge that is connected with described level gauging instrument interface, is used for measuring the liquid level of the chemical solution that enters described LOCA stove;
The steam inlet of described LOCA stove is 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 used 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 upward evacuation port, following evacuation port are used for controlling in real time the pressure in the described LOCA stove;
In the non-thermal shock stage, described variable valve is used for supplying with/stopping to described LOCA stove supplying with steam with the space temperature in the control LOCA stove; Described compressed air inlet is used for adding pressurized air to control the pressure in the described LOCA stove to described LOCA stove; The described evacuation port of going up is used to control the interior pressure of described LOCA stove with following evacuation port.
2. the system as claimed in claim 1 is characterized in that, described system also comprises:
The chemical solution storage tank is used to store chemical liquid;
Spray pump is connected with described chemical solution storage tank, is used for the chemical solution of described chemical solution storage tank is input to the described LOCA stove from described chemical solution import;
Heat interchanger is used for the liquid that the outlet through described chemical solution is discharged is cooled off, and is input to described chemical solution storage tank and stores.
3. system as claimed in claim 2 is characterized in that, described system is used to test the three generations when examining one-level equipment, also comprises:
Reheater, being used for will wherein saturated vapour heating and pressurizing of input, and is input to described drum and stores.
4. as claim 2 or 3 described systems, it is characterized in that described LOCA stove is vertical LOCA stove, the steam inlet of described LOCA stove comprises four branch imports that evenly are provided with along described LOCA stove circumference; The temperature element that described temperature measuring instrument interface connects evenly is arranged on the middle and upper part of described LOCA stove outside along the circumference of LOCA stove.
5. as claim 2 or 3 described systems, it is characterized in that described LOCA stove is horizontal LOCA stove, the steam inlet of described LOCA stove comprises four branch imports that evenly are provided with and are symmetrical in the center line and the axis of described LOCA stove; The temperature element that described temperature measuring instrument interface connects evenly is arranged on described LOCA stove outside along the axis of LOCA stove.
6. a method of carrying out the nuclear one-level equipment performance test of two generations in nuclear 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 keep temperature in the described LOCA stove;
Phase III, after the pipeline of the described LOCA stove input of subtend steam carries out heating coil, close the outlet valve of described drum, in drum, pour steam; Open the quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, regulate the pressure in the described LOCA stove, before the caloric impact temperature peak value arrives, close described quick-opening valve and last evacuation port and following evacuation port, to continuing to fill steam in the LOCA stove, control the interior pressure of described LOCA stove with following evacuation port by variable valve with compressed air inlet and last evacuation port;
The quadravalence section is closed the steam inlet total valve of LOCA stove, closes the admission valve and the outlet valve of described drum, makes described LOCA stove natural cooling;
Five-stage, in the LOCA stove during temperature decline predetermined temperature value, the electric heater that starts on the described LOCA stove heats the space temperature of its LOCA stove;
The 6th stage, after the pipeline of the described LOCA stove input of subtend steam carries out heating coil, close the outlet valve of described drum, in drum, pour steam; Open the quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, regulate the pressure in the described LOCA stove, before the caloric impact temperature peak value arrives, close described quick-opening valve and last evacuation port and following evacuation port, to continuing to fill steam in the LOCA stove, control the interior pressure of described LOCA stove with following evacuation port by variable valve with compressed air inlet and last evacuation port; 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 the described LOCA stove is cooled to liquid by shower water, discharges through the chemical solution outlet.
The 7th stage, close the valve of spray pump and chemical solution import, regulate the steam that enters the LOCA stove by the variable valve at steam inlet place, control the temperature and pressure in the described LOCA stove;
The 8th stage, close described steam inlet total valve, open described evacuation port and the following evacuation port gone up, 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 space temperature to 50 ℃ in the electric heater heating LOCA stove of LOCA stove; In 24 hours, the space temperature of LOCA stove is maintained between 48 ℃-52 ℃.
8. method as claimed in claim 7 is characterized in that, the described phase III comprises:
The steam inlet total valve of opening described LOCA stove is to aperture 20%-50%, and the pipeline of the described LOCA stove input of subtend steam carries out heating coil;
Heating coil finishes, and closes the drum outlet, and to pouring steam in the drum, making its temperature is 180 ℃, and pressure is 1.0MPaa;
All open the quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, to described LOCA stove input steam, so that described LOCA furnace inner space temperature realizes being rapidly heated;
Utilize the last evacuation port and the following evacuation port of described LOCA stove to regulate the interior pressure of described LOCA stove;
Before the peaking, the quick-opening valve in steam off exit closes and closes evacuation port and following evacuation port, enters the thermally-stabilised stage at caloric impact temperature;
Utilize the variable valve of described steam outlet to continue to pour steam, measure the temperature of described LOCA stove, control the aperture of described steam regulating valve to described LOCA stove;
Measure the pressure of described LOCA stove, be used to control the aperture of the valve of the valve of the valve of described compressed air inlet and last evacuation port and following 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 ℃, starts the electric heater on the described LOCA stove, keeps the interior space temperature of described LOCA stove at 48 ℃-52 ℃.
10. method as claimed in claim 9 is characterized in that, described the 6th stage comprises:
The steam inlet total valve of opening described LOCA stove is to aperture 20%-50%, and the pipeline of the described LOCA stove input of subtend steam carries out heating coil;
Heating coil finishes, and closes the drum outlet, and to pouring steam in the drum, making its temperature is 180 ℃, and pressure is 1.0MPaa;
All open the quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, to described LOCA stove input steam, so that described LOCA furnace inner space temperature realizes being rapidly heated;
Utilize the last evacuation port and the following evacuation port of described LOCA stove to regulate the interior pressure of described LOCA stove;
Before the peaking, the quick-opening valve in steam off exit closes and closes evacuation port and following evacuation port, enters the thermally-stabilised stage at caloric impact temperature;
Utilize the variable valve of described steam outlet to continue to pour steam, measure the temperature of described LOCA stove, control the aperture of described steam regulating valve to described LOCA stove;
Measure the pressure of described LOCA stove, be used to control the aperture of the valve of the valve of the valve of described compressed air inlet and last evacuation port and following evacuation port;
Open the valve of chemical solution import, start spray pump, the valve of chemical solution outlet is controlled to keep the LOCA furnace pressure by the liquid level in the LOCA stove;
The chemical solution of discharging in the LOCA stove is got back to the chemical solution storage tank after the heat interchanger cooling;
When the space temperature pressure in LOCA stove when curve descends in accordance with regulations, the space temperature in the LOCA stove is by the variable valve control of steam outlet, and pressure is by compressed air inlet valve and the control of last exhaust-valve.
11., it is characterized in that described the 7th stage comprises as each described method among the claim 6-10:
Close spray pump, close the chemical solution imported valve, continue with the space temperature to 100 in the variable valve control LOCA stove of steam outlet ℃, pressure is adjusted to 0.2MPaa.
12. one kind is carried out the method that the three generations examines the test of one-level equipment performance in nuclear one-level equipment performance test macro as claimed in claim 1, it is characterized in that, comprises the step of following generation test environment:
In first and second stage, heat and keep temperature in the described LOCA stove;
Phase III, open described steam inlet total valve saturated vapour is imported reheater, through importing drum after the reheater heating and pressurizing, after being cooled to liquid by shower water, described LOCA stove discharges; Stablize the vapor (steam) temperature and the pressure of reheater outlet; Close the outlet of drum, drum is poured steam; Open the quick-opening valve and the variable valve at the steam inlet place of described LOCA stove, regulate the pressure in the described LOCA stove, before the caloric impact temperature peak value arrives, close described quick-opening valve and last evacuation port and following evacuation port, to continuing to fill steam in the LOCA stove, control the interior pressure of described LOCA stove with following evacuation port by variable valve with compressed air inlet and last evacuation port;
The quadravalence section is closed the steam inlet variable valve of LOCA stove, the last evacuation port of standard-sized sheet LOCA stove and following evacuation port, steam and steam condensate in the eliminating LOCA stove;
Five-stage, when temperature dropped to predetermined temperature value in the LOCA stove, the electric heater that starts on the described LOCA stove heated the space temperature of its LOCA stove;
In the 6th stage, the outlet temperature of the described reheater of preheating charges into steam to described drum, makes the temperature and pressure in the described drum reach predetermined value;
The 7th stage, close the valve of spray pump and chemical solution import, regulate the steam that enters the LOCA stove by the variable valve at steam inlet place, control the temperature and pressure in the described LOCA stove;
The 8th stage, close described steam inlet total valve, open described evacuation port and the following evacuation port gone up, so that described LOCA furnace inner space temperature drops to normal temperature, make its pressure drop to normal pressure.
13. method as claimed in claim 12 is characterized in that, described first and second stage comprises:
Adopt the space temperature to 50 ℃ in the electric heater heating LOCA stove of LOCA stove; In 24 hours, the space temperature of LOCA stove is maintained between 48 ℃-52 ℃.
14. method as claimed in claim 13 is characterized in that, the described phase III comprises:
Open the steam inlet total valve to regulation aperture 20%-30%;
Saturated vapour enters reheater, through entering drum after the reheater heating;
Steam in drum input LOCA stove is discharged through the chemical solution escape hole after being cooled to liquid by shower water;
When the reheater steam exit temperature is stabilized to 280-300 ℃, behind the pressure stability 1.0MPaa, close the drum outlet, drum is charged into steam, make the temperature in it arrive 280-300 ℃, pressure is to 1.0MPaa;
All open the quick-opening valve and the variable valve of the steam outlet of the LOCA stove of testing;
The valve of the valve of evacuation port and following evacuation port control LOCA furnace pressure in the adjusting;
Before the peak value that arrives caloric impact temperature, the quick-opening valve in steam off exit closes and closes the valve of evacuation port and the valve of following evacuation port, enters the thermally-stabilised stage;
Variable valve with steam outlet continues to fill steam in the LOCA stove, the LOCA stove is carried out temperature survey, with the control valve opening of the temperature control steam outlet measured, the aperture of the valve of the valve of compressed air inlet and the valve of last evacuation port and following evacuation port is controlled by the LOCA furnace pressure.
15. method as claimed in claim 14 is characterized in that, described quadravalence section comprises:
Close the variable valve at the steam inlet place of LOCA stove, the valve of the last evacuation port of standard-sized sheet LOCA stove and the valve of following evacuation port are discharged steam and steam condensate in the 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 of standby LOCA stove and the valve of chemical solution import, start the spray of standby LOCA stove, the steam that is heated by reheater is after standby LOCA stove cooling, by evacuation port emptying under the standby LOCA stove, drop to 200 ℃ until the reheater outlet temperature;
Steam off import main valve cuts out the steam inlet valve of reheater.
16. method as claimed in claim 15 is characterized in that, described five-stage comprises:
Space temperature in described LOCA stove drops to 50 ℃, starts the electric heater on the described LOCA stove, keeps the interior space temperature of described LOCA stove at 48 ℃-52 ℃.
17. method as claimed in claim 16 is characterized in that, described the 6th stage comprises:
Elder generation's preheating reheater outlet temperature is to 280-300 ℃;
Drum is charged into steam, implement thermal shock the LOCA stove;
When the space temperature of LOCA stove drops to 200 ℃, close the reheater power supply;
When the reheater outlet temperature reaches 200 ℃, open the drum steam inlet, to close reheater steam and import and export, steam directly charges into the LOCA stove by drum;
Open valve to the regulation aperture, saturated vapour enters reheater, through entering drum after the reheater heating;
Steam emptying after described LOCA stove is cooled to liquid by shower water when the reheater outlet temperature is stabilized to 280-300 ℃, behind the 1.0MPaa, is closed the drum outlet, and drum is filled steam, makes its interior temperature to 280-300 ℃, and pressure is to 1.0MPaa.
18., it is characterized in that described the 7th stage comprises as each described method among the claim 12-17:
Close spray pump, close the chemical solution imported valve, continue with the space temperature to 100 in the variable valve control L0CA stove of steam outlet ℃, pressure is adjusted to 0.2MPaa.
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| CN103871519A (en) * | 2012-12-14 | 2014-06-18 | 中国核动力研究设计院 | Method using major loop thermometer to monitor severe accident |
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| CN114414277A (en) * | 2022-01-13 | 2022-04-29 | 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 |
| 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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