CN109255176B - Dynamic exhaust subsequent loop residual air volume standard value lifting analysis method and system - Google Patents
Dynamic exhaust subsequent loop residual air volume standard value lifting analysis method and system Download PDFInfo
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Abstract
The invention discloses a dynamic exhaust subsequent loop residual air volume standard value lifting analysis method and a system, wherein the method comprises the following steps: aiming at a standard value of the residual air volume of a loop to be lifted, analyzing the feasibility of lifting the standard value from the angle of primary loop water chemistry control; after the feasibility analysis is passed, the likelihood that release of the loop dissolved air from the coolant results in a loop becoming two-phase flow is analyzed; after the analysis that two-phase flow is possible, carrying out safety analysis on the unit under the high-solubility air state; after it is analyzed that two-phase flow is impossible or safety analysis is passed, the mechanical characteristics of the gas-containing operation of the important equipment of the primary loop are analyzed, and if the mechanical characteristics are analyzed, the standard value to be lifted is confirmed to be available. The invention can be used for analyzing and proving the lifting of the standard value of the residual air volume of the primary circuit of the nuclear power unit, and can be used for confirming whether the primary circuit air volume standard value to be lifted is available or not and can also be used in the fields of overhaul strategy optimization and the like.
Description
Technical Field
The invention relates to the field of nuclear power, in particular to a method and a system for improving and analyzing a standard value of the residual air volume of a loop after dynamic exhaust.
Background
The pressurized water reactor nuclear power plant uses water as a primary loop coolant, a moderator and a secondary loop working medium, and the coolant water works under the condition of strong radioactive irradiation. Thus, corrosion phenomena are more serious and detrimental in nuclear power plants. If the fuel element cladding breaks, leaking fission products into a circuit, will increase the radioactivity of the circuit coolant. As one of the means for corrosion protection, it is necessary to remove dissolved oxygen as much as possible during the control of the unit operation.
In the restarting process after the uncovering, reloading and overhaul of the machine set, the operation of static air discharge and dynamic air discharge is carried out for a plurality of times after the loop is full of water so as to discharge the residual air in the loop. Only after the measured residual standard air volume of the primary loop is lower than 21 standard cubic meters, nitrogen purging is carried out until the oxygen content of the capacity control box is lower than 2%, and the unit is allowed to continue to ascend to a platform at 80 ℃ for chemical deoxidation. After chemical oxygen removal, the oxygen content of the primary circuit water is subject to the values required in the chemical and radiochemical specifications. At present, in the starting process of a pressurized water reactor nuclear power unit, a method of firstly performing static exhaust and then performing dynamic exhaust (inching a main pump) is generally adopted to perform loop exhaust, and the residual air volume of a loop is judged according to the liquid level change of a volume control box, wherein the current standard is 21 standard cubic meters. If the residual air volume of the first loop is lower than 21 standard cubic meters, the unit continues to ascend to perform operations such as chemical deoxidation and the like. Due to unit difference and different specific operation details, the situation that the main pump does not reach the standard after a plurality of times of inching often occurs, and an operator can only start and stop the main pump continuously to exhaust. The main pump is started and stopped for multiple times to exhaust, so that the equipment safety of the main pump is jeopardized, and a major repair critical path is delayed, so that major repair optimization is not facilitated.
As each overhaul consumes a great deal of manpower and time on static exhaust and dynamic exhaust operation of a loop, personnel is more in dose, overhaul management departments and operation departments of the nuclear power unit in China have studied and improved the static and dynamic exhaust operation for a long time, including adjusting the order of static and dynamic exhaust, installing temporary pump suction to accelerate exhaust, and the like, and have achieved remarkable results. However, there are disadvantages to varying degrees in the implementation. And the standard value of the residual air volume of one loop is improved by a very creative method. At present, the pressurized water reactor nuclear power unit does not see the research of lifting the standard value of the residual air volume of a loop in the starting process of the unit, and does not have an analysis method for lifting the standard value of the residual air volume of the loop.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method and a system for improving and analyzing the standard value of the residual air volume of a loop after dynamic exhaust aiming at the defects in the prior art.
The technical scheme adopted for solving the technical problems is as follows: a method for analyzing the standard value lifting of the residual air volume of a dynamic exhaust subsequent loop is constructed, and the method comprises the following steps:
chemical analysis: aiming at a standard value of the residual air volume of a loop to be lifted, analyzing the feasibility of lifting the standard value from the angle of primary loop water chemistry control;
a flow analysis step: after the feasibility analysis passes, analyzing the likelihood that release of a loop of dissolved air from the coolant results in a loop becoming two-phase flowing;
and unit safety analysis: after the analysis that two-phase flow is possible, carrying out safety analysis on the unit under the high-solubility air state;
important equipment mechanics analysis: after the analysis that two-phase flow is impossible or safety analysis passes, the mechanical characteristics of the gas-containing operation of the important equipment of the loop are analyzed, if the mechanical characteristics are analyzed to pass, the standard value to be lifted is confirmed to be available, otherwise, the standard value to be lifted is confirmed to be unavailable.
Preferably, the method further comprises:
optimizing: after confirming that the standard value to be lifted is available, analyzing and optimizing the purging strategy of the containment box; the chemical platform diamine deoxygenation strategy was analyzed and optimized.
Preferably, the flow analysis step specifically includes:
modeling a loop and its auxiliary systems;
based on the established model, the thermal parameters of the main nodes of a loop in the starting process of the main pump are analyzed;
calculating a saturated air solubility based on the thermodynamic parameter;
for the standard value of the residual air volume of a loop to be lifted, if the air solubility caused by the lifting of the standard value is higher than the saturated air solubility, confirming that the dissolved air in the loop will be separated out, and changing the flow of the loop into two-phase flow.
Preferably, the unit safety analysis step specifically includes:
in the normal shutdown mode of cooling the waste heat removal system, the following three analyses are performed: design reference accident analysis under a loop two-phase flow working condition, safety function analysis of a loop system and equipment under the loop two-phase flow working condition, and structural integrity analysis of the equipment and components under the loop two-phase flow working condition;
if all the three analyses pass, the unit in the high-solubility air state is judged to pass the safety analysis.
Preferably, the step of mechanical analysis of the important equipment specifically includes:
modeling the gas-containing operation of the important equipment of the loop, analyzing various performance and mechanical indexes of the gas-containing operation of the important equipment, comparing the performance and mechanical indexes with relevant specifications and field relevant data, and judging that the mechanical analysis passes if the performance and mechanical indexes are compared with the relevant specifications and the field relevant data.
The invention also discloses a system for lifting and analyzing the standard value of the residual air volume of the dynamic exhaust subsequent loop, which comprises the following steps:
the chemical analysis module is used for analyzing the feasibility of standard value lifting from the angle of primary circuit water chemistry control aiming at the primary circuit residual air volume standard value to be lifted;
a flow analysis module for analyzing a likelihood that release of a loop of dissolved air from the coolant results in a loop becoming two-phase flow after the feasibility analysis passes;
the unit safety analysis module is used for carrying out safety analysis on the unit in the high-solubility air state after the two-phase flow possibly occurs is analyzed;
and the important equipment mechanical analysis module is used for analyzing the mechanical characteristics of the gas-containing operation of the important equipment of the first loop after the two-phase flow is not possible to occur or the safety analysis is passed, and confirming that the standard value to be lifted is available if the mechanical characteristics are passed, or confirming that the standard value to be lifted is not available if the mechanical characteristics are not passed.
Preferably, the system further comprises:
the optimizing module is used for analyzing and optimizing the purging strategy of the volume control box after confirming that the standard value to be lifted is available; the chemical platform diamine deoxygenation strategy was analyzed and optimized.
Preferably, the flow analysis module specifically includes:
the thermal parameter analysis unit is used for analyzing the thermal parameters of main nodes of a loop in the starting process of the main pump based on a model established for the loop and an auxiliary system of the loop;
a saturated air solubility analysis unit for calculating a saturated air solubility based on the thermal parameter;
and the two-phase flow prediction unit is used for confirming that dissolved air in the one loop will be separated out and the one-loop flow will be changed into two-phase flow if the air solubility caused by the lifting of the standard value is higher than the saturated air solubility for the standard value of the residual air volume of the one loop to be lifted.
Preferably, the unit safety analysis module is specifically configured to perform the following three analyses in a normal shutdown mode of cooling the waste heat removal system: design reference accident analysis under a loop two-phase flow working condition, safety function analysis of a loop system and equipment under the loop two-phase flow working condition, and structural integrity analysis of the equipment and components under the loop two-phase flow working condition; if all the three analyses pass, the unit in the high-solubility air state is judged to pass the safety analysis.
Preferably, the important equipment mechanical analysis module is specifically configured to model the gas-containing operation of the important equipment of the loop, analyze various performances and mechanical indexes of the gas-containing operation of the important equipment, compare the performances and mechanical indexes with relevant specifications and field relevant data, and if the performances and mechanical indexes are compared, determine that the mechanical analysis is passed.
The method and the system for improving and analyzing the standard value of the residual air volume of the dynamic exhaust subsequent loop have the following beneficial effects: the invention can be used for analyzing and proving the primary loop air volume standard value of the nuclear power unit to be lifted, and can be used for confirming whether the primary loop air volume standard value to be lifted is available or not and also can be used in the fields of overhaul strategy optimization and the like.
Drawings
For a clearer description of an embodiment of the invention or of a technical solution in the prior art, the drawings that are needed in the description of the embodiment or of the prior art will be briefly described, it being obvious that the drawings in the description below are only embodiments of the invention, and that other drawings can be obtained, without inventive effort, by a person skilled in the art from the drawings provided:
FIG. 1 is a flow chart of a method for analyzing the residual air volume calibration value of a dynamic exhaust back-circuit according to the first embodiment;
fig. 2 is a schematic structural diagram of a system for analyzing the residual air volume standard value of a dynamic exhaust back-circuit according to the second embodiment.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Exemplary embodiments of the present invention are illustrated in the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The invention has the following general ideas: aiming at a standard value of the residual air volume of a loop to be lifted, analyzing the feasibility of lifting the standard value from the angle of primary loop water chemistry control; after the feasibility analysis passes, analyzing the likelihood that release of a loop of dissolved air from the coolant results in a loop becoming two-phase flowing; after the analysis that two-phase flow is possible, carrying out safety analysis on the unit under the high-solubility air state; after the analysis that two-phase flow is impossible or safety analysis passes, the mechanical characteristics of the gas-containing operation of the important equipment of the loop are analyzed, if the mechanical characteristics are analyzed to pass, the standard value to be lifted is confirmed to be available, otherwise, the standard value to be lifted is confirmed to be unavailable.
In order to better understand the above technical solutions, the following detailed description will be made with reference to the accompanying drawings and specific embodiments, and it should be understood that specific features in the embodiments and examples of the present invention are detailed descriptions of the technical solutions of the present application, and not limit the technical solutions of the present application, and the technical features in the embodiments and examples of the present invention may be combined with each other without conflict.
Example 1
Referring to fig. 1, a first embodiment discloses a method for analyzing a standard value of residual air volume of a circuit after dynamic exhaust, the method comprising:
chemical analysis step S101: aiming at a standard value of the residual air volume of a loop to be lifted, analyzing the feasibility of lifting the standard value from the angle of primary loop water chemistry control;
flow analysis step S102: after the feasibility analysis passes, analyzing the likelihood that release of a loop of dissolved air from the coolant results in a loop becoming two-phase flowing;
unit safety analysis step S103: after the analysis that two-phase flow is possible, carrying out safety analysis on the unit under the high-solubility air state;
important equipment mechanics analysis step S104: after the analysis that two-phase flow is impossible or safety analysis passes, the mechanical characteristics of the gas-containing operation of the important equipment of the loop are analyzed, if the mechanical characteristics are analyzed to pass, the standard value to be lifted is confirmed to be available, otherwise, the standard value to be lifted is confirmed to be unavailable.
Optimization step S105: after confirming that the standard value to be lifted is available, analyzing and optimizing the purging strategy of the containment box; the chemical platform diamine deoxygenation strategy was analyzed and optimized.
Regarding step S101:
in a specific embodiment, the chemical analysis step S101 specifically includes:
s1011, aiming at a standard value of the air volume of a loop to be lifted, analyzing the influence of the standard value lifting on the total time of a dynamic exhaust link, a capacity control box purging link and a chemical platform diamine deoxidizing link;
and S1012, if the total time does not exceed the total time corresponding to the original standard value, judging that the feasibility analysis is passed.
The standard value is improved, which means that after the dynamic exhaust link is finished, the residual air volume of a loop is higher than the original standard value of 21 standard cubic meters, so that more residual air needs to be treated in the follow-up purging link of the container control box and the chemical platform diamine deoxidization link, and after the chemical platform diamine deoxidization link, the dissolved oxygen content is ensured to be smaller than the value required in the chemical and radiochemical technical specifications, such as 0.1 ppm.
Specifically, the promotion of the residual air after the dynamic exhaust can be solved by increasing the blowing times of the blowing link of the volume control box and increasing the diamine amount of the diamine deoxidization link of the chemical platform, and the time change caused specifically can be predicted by model prediction and also can be estimated based on empirical data comparison.
Regarding step S102:
according to the related guideline and a design method of a loop system and equipment, trace air (non-condensed gas) dissolved in the coolant is not considered when the pressurized water reactor is designed in a thermodynamic manner. Even if considered, it is generally considered that the non-condensable gas dissolved in the coolant has a uniform flow of the same velocity field, temperature field, and pressure field as the liquid phase. If the standard value of the residual air volume of the loop is increased to be feasible, the dynamic exhaust is finished until the chemical platform diamine deoxidizes to be qualified, and the air solubility is increased in the coolant flowing in the loop and the main auxiliary system. According to the theory of two-phase flow, when a transient occurs in a circuit, resulting in a drop in pressure in the circuit, the gas uniformly dissolved in the coolant will gasify (the dissolved air is released from the coolant, becomes bubbles, and the bubbles have a different velocity field, temperature field, pressure field from the surrounding coolant), and the flow is a two-phase flow (bubble flow). According to the above analysis, if the residual air volume standard value of the next loop after dynamic exhaust is increased, modeling needs to be performed on the next loop and an auxiliary system thereof, and whether the dissolved air in the next loop is released from the coolant to be changed into two-phase flow in the transient process caused by starting and stopping the main pump is analyzed. For the CPR1000 unit, the analysis results were: the standard value of the residual air volume of the primary loop is increased to 24 standard cubic meters, dissolved air in flowing coolant can not be released to form bubbles, two-phase flow can not be formed, and the operation safety of the primary loop system and equipment is not influenced.
In a specific embodiment, the flow analysis step 102 specifically includes:
s1021, modeling a loop and an auxiliary system thereof;
s1022, based on the established model, the thermodynamic parameters of the main nodes of the loop in the starting process of the main pump, such as pressure, temperature and the like, are analyzed.
S1023, calculating the saturated air solubility based on the thermal parameter, and generally calculating the corresponding saturated oxygen solubility and saturated nitrogen solubility.
S1024, for the standard value of the residual air volume of the loop to be lifted, if the air solubility caused by the lifting of the standard value is higher than the saturated air solubility, generally the oxygen solubility and the nitrogen solubility are respectively higher than the saturated oxygen solubility and the saturated nitrogen solubility, the dissolved air in the loop is confirmed to be separated out, and the flow of the loop is changed into two-phase flow.
Regarding step S103:
in a specific embodiment, the unit safety analysis step S103 specifically includes: in the normal shutdown mode of cooling the waste heat removal system, the following three analyses are performed: design reference accident analysis under a loop two-phase flow working condition, safety function analysis of a loop system and equipment under the loop two-phase flow working condition, and structural integrity analysis of the equipment and components under the loop two-phase flow working condition; if all the three analyses pass, the unit in the high-solubility air state is judged to pass the safety analysis.
Regarding step S104:
in a specific embodiment, the important equipment mechanics analysis step S104 specifically includes: modeling the gas-containing operation of the important equipment of the loop, analyzing various performance and mechanical indexes of the gas-containing operation of the important equipment, comparing the performance and mechanical indexes with relevant specifications and field relevant data, and judging that the mechanical analysis passes if the performance and mechanical indexes are compared with the relevant specifications and the field relevant data.
For example, a circuit-critical device includes a main pump, which can be modeled in three dimensions, calculated and analyzed for pump flow, head, and finite element analysis and vibration evaluation under gas-containing operation.
Regarding step S105:
the volume control box purge comprises two stages: pressure build-up purge and intermittent purge. The pressure-holding purging is performed by increasing the liquid level of the control box and discharging oxygen in the upper space of the control box, and the standard of the stage is lower than 10%; intermittent purging is to open the vent valve to vent oxygen at regular intervals, a stage of which is standard below 2%. Therefore, the time and effect of each link can be analyzed through modeling analysis and on-site data checking, and even the standard of the pressure-holding purging stage is changed, so that the minimum purging times can be realized, and the same 2% standard can be achieved.
Regarding the optimization of diamine deoxidization of a chemical platform, the addition amount of diamine and deoxidization effect can be influenced by the dissolved oxygen amount in a loop coolant, the dissolved oxygen amount in a volume control box, the residual free oxygen amount in a loop and the oxygen generated by decomposition of added hydrogen peroxide. Analyzing each influencing factor and the effect thereof to obtain the optimal diamine addition.
Example two
Referring to fig. 2, based on the same inventive concept as the first embodiment, the present embodiment discloses a dynamic exhaust back-circuit residual air volume standard value lifting analysis system, comprising:
the chemical analysis module 201 is configured to analyze, for a standard value of a remaining air volume of a first circuit to be lifted, feasibility of lifting the standard value from a first circuit water chemistry control perspective;
a flow analysis module 202 for analyzing a likelihood that release of a loop of dissolved air from the coolant results in a loop becoming two-phase flow after the feasibility analysis passes;
the unit safety analysis module 203 is configured to perform safety analysis on the unit in the high-solubility air state after analyzing that two-phase flow may occur;
and the important equipment mechanical analysis module 204 is used for analyzing the mechanical characteristics of the gas-containing operation of the important equipment of the loop after the two-phase flow is not possible to occur or the safety analysis is passed, if the mechanical characteristics are passed, confirming that the standard value to be lifted is available, otherwise, confirming that the standard value to be lifted is not available.
The optimizing module 205 is configured to analyze and optimize the purging strategy of the containment tank after confirming that the standard value to be lifted is available; the chemical platform diamine deoxygenation strategy was analyzed and optimized.
Specifically, the flow analysis module 202 specifically includes:
the thermal parameter analysis unit is used for analyzing the thermal parameters of main nodes of a loop in the starting process of the main pump based on a model established for the loop and an auxiliary system of the loop;
a saturated air solubility analysis unit for calculating a saturated air solubility based on the thermal parameter;
and the two-phase flow prediction unit is used for confirming that dissolved air in the one loop will be separated out and the one-loop flow will be changed into two-phase flow if the air solubility caused by the lifting of the standard value is higher than the saturated air solubility for the standard value of the residual air volume of the one loop to be lifted.
Specifically, the unit safety analysis module is specifically configured to perform the following three analyses in a normal shutdown mode of cooling the waste heat removal system: design reference accident analysis under a loop two-phase flow working condition, safety function analysis of a loop system and equipment under the loop two-phase flow working condition, and structural integrity analysis of the equipment and components under the loop two-phase flow working condition; if all the three analyses pass, the unit in the high-solubility air state is judged to pass the safety analysis.
Specifically, the important equipment mechanical analysis module 203 is specifically configured to model the air-containing operation of the important equipment of the loop, analyze various performances of the air-containing operation of the important equipment, compare the performances with relevant specifications and field performance data, and if the performances are qualified, determine that the mechanical characteristic analysis is passed.
For further details, reference may be made to the first embodiment, and no further description is given here.
It is noted that in the above description of the various modules, the division into these modules is for clarity of illustration. However, in actual implementation, the boundaries of the various modules may be fuzzy. For example, any or all of the functional modules herein may share various hardware and/or software elements. As another example, any and/or all of the functional modules herein may be implemented in whole or in part by execution of software instructions by a common processor. In addition, various software sub-modules executed by one or more processors may be shared among various software modules. Accordingly, the scope of the present invention is not limited by the mandatory boundaries between the various hardware and/or software elements unless expressly required.
In summary, the method and the system for improving and analyzing the standard value of the residual air volume of the dynamic exhaust subsequent loop have the following beneficial effects: the invention can be used for analyzing and proving the standard value lifting of the residual air volume of the first loop after the dynamic exhaust of the nuclear power unit, and can be used for confirming whether the standard value of the residual air volume of the first loop to be lifted is available or not and can also be used in the fields of overhaul strategy optimization and the like.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (6)
1. The method for analyzing the standard value lifting of the residual air volume of the dynamic exhaust subsequent loop is characterized by comprising the following steps of:
chemical analysis: aiming at a standard value of the residual air volume of a loop to be lifted, analyzing the feasibility of lifting the standard value from the angle of primary loop water chemistry control;
a flow analysis step: after the feasibility analysis passes, analyzing the likelihood that release of a loop of dissolved air from the coolant results in a loop becoming two-phase flowing;
and unit safety analysis: after the analysis that two-phase flow is possible, carrying out safety analysis on the unit under the high-solubility air state;
important equipment mechanics analysis: after the analysis that two-phase flow is impossible or safety analysis passes, the mechanical characteristics of the gas-containing operation of the important equipment of the primary loop are analyzed, if the mechanical characteristics are analyzed to pass, the standard value to be lifted is confirmed to be available, otherwise, the standard value to be lifted is confirmed to be unavailable;
the flow analysis step specifically comprises the following steps: modeling a loop and its auxiliary systems; based on the established model, the thermal parameters of the main nodes of a loop in the starting process of the main pump are analyzed; calculating a saturated air solubility based on the thermodynamic parameter; for the standard value of the residual air volume of a loop to be lifted, if the air solubility caused by the lifting of the standard value is higher than the saturated air solubility, confirming that the dissolved air in the loop will be separated out, and changing the flow of the loop into two-phase flow;
the unit safety analysis steps specifically comprise: in the normal shutdown mode of cooling the waste heat removal system, the following three analyses are performed: design reference accident analysis under a loop two-phase flow working condition, safety function analysis of a loop system and equipment under the loop two-phase flow working condition, and structural integrity analysis of the equipment and components under the loop two-phase flow working condition; if all the three analyses pass, the unit in the high-solubility air state is judged to pass the safety analysis.
2. The method for dynamic exhaust back-circuit residual air volume calibration value boost analysis of claim 1, further comprising:
optimizing: after confirming that the standard value to be lifted is available, analyzing and optimizing the purging strategy of the containment box; the chemical platform diamine deoxygenation strategy was analyzed and optimized.
3. The method for improving and analyzing the standard value of the residual air volume of the dynamic exhaust back circuit according to claim 1, wherein the important equipment mechanics analysis step specifically comprises the following steps:
modeling the gas-containing operation of the important equipment of the loop, analyzing various performance and mechanical indexes of the gas-containing operation of the important equipment, comparing the performance and mechanical indexes with relevant specifications and field relevant data, and judging that the mechanical analysis passes if the performance and mechanical indexes are compared with the relevant specifications and the field relevant data.
4. A dynamic exhaust back-loop residual air volume standard value lifting analysis system, comprising:
the chemical analysis module is used for analyzing the feasibility of standard value lifting from the angle of primary circuit water chemistry control aiming at the primary circuit residual air volume standard value to be lifted;
a flow analysis module for analyzing a likelihood that release of a loop of dissolved air from the coolant results in a loop becoming two-phase flow after the feasibility analysis passes;
the unit safety analysis module is used for carrying out safety analysis on the unit in the high-solubility air state after the two-phase flow possibly occurs is analyzed;
the important equipment mechanical analysis module is used for analyzing the mechanical characteristics of the gas-containing operation of the important equipment of the first loop after the two-phase flow is not likely to occur or the safety analysis is passed, if the mechanical characteristics are passed, confirming that the standard value to be lifted is available, otherwise, confirming that the standard value to be lifted is not available;
wherein, the flow analysis module specifically includes: the thermal parameter analysis unit is used for analyzing the thermal parameters of main nodes of a loop in the starting process of the main pump based on a model established for the loop and an auxiliary system of the loop; a saturated air solubility analysis unit for calculating a saturated air solubility based on the thermal parameter; the two-phase flow prediction unit is used for determining that dissolved air in a loop will be separated out and that the flow of the loop will be changed into two-phase flow if the air solubility caused by the lifting of the standard value is higher than the saturated air solubility for the standard value of the residual air volume of the loop to be lifted;
the unit safety analysis module is specifically used for executing the following three analyses under the normal shutdown mode of cooling the waste heat discharging system: design reference accident analysis under a loop two-phase flow working condition, safety function analysis of a loop system and equipment under the loop two-phase flow working condition, and structural integrity analysis of the equipment and components under the loop two-phase flow working condition; if all the three analyses pass, the unit in the high-solubility air state is judged to pass the safety analysis.
5. The dynamic exhaust after-circuit residual air volume fraction boost analysis system of claim 4, further comprising:
the optimizing module is used for analyzing and optimizing the purging strategy of the volume control box after confirming that the standard value to be lifted is available; the chemical platform diamine deoxygenation strategy was analyzed and optimized.
6. The system for improving and analyzing the residual air volume standard value of the dynamic exhaust subsequent loop according to claim 4, wherein the important equipment mechanical analysis module is specifically configured to model the air-containing operation of the primary loop, analyze various performance and mechanical indexes of the air-containing operation of the important equipment, and compare the performance and mechanical indexes with relevant specifications and field relevant data, and if the performance and mechanical indexes are compared, determine that the mechanical analysis is passed.
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