A collaborative design method for fast reactors

Abstract

The present application provides a collaborative design method for a fast reactor, the method comprising: determining an upstream system located upstream of the equipment to be designed of the fast reactor and related systems associated with the equipment to be designed, wherein the equipment to be designed includes a stack container and internal components of the fast reactor; obtaining requirements of the upstream system and related systems; determining the design requirements of the equipment to be designed based on the requirements of the upstream system and related systems; performing functional decomposition and performance decomposition on the equipment to be designed based on the design requirements; designing the first layer of components included in the equipment to be designed based on the decomposed functions and performances; and designing the second layer of components included in the equipment to be designed based on the functional and performance requirements of the first layer of components. The collaborative design method of the present application is conducive to quickly completing modification positioning and related modification work, reducing the number of iterations of the overall equipment, shortening the development cycle, and achieving efficient collaborative design.

Description

Technical Field

[0001] The present application relates to the field of nuclear engineering technology, and in particular to a collaborative design method for fast reactors. Background Art

[0002] When designing reactor containers and internal components, due to the large number of related systems and equipment and the involvement of many disciplines, it is necessary for multiple systems, units and departments to work together, which makes it difficult to update and iterate the reactor containers and internal components. Summary of the invention

[0003] In one aspect, the present application provides a collaborative design method for a fast reactor, the method comprising:

[0004] Determining an upstream system located upstream of a device to be designed of a fast reactor and a related system associated with the device to be designed, wherein the device to be designed includes a reactor vessel and reactor internals of the fast reactor;

[0005] Obtaining requirements of the upstream system and the related systems;

[0006] Determining design requirements of the device to be designed according to the acquired requirements of the upstream system and the related systems;

[0007] According to the design requirements, perform functional decomposition and performance decomposition on the device to be designed;

[0008] Designing the first-layer components of the device to be designed according to the decomposed functions and performances; and

[0009] According to the functions and performance requirements of the first-layer components, the second-layer components included in the device to be designed are designed.

[0010] According to the collaborative design method of the present application, large and complex equipment with multiple parameters is split into multiple parts, and the core requirements of each part are used as the iteration direction, which is conducive to quickly completing the modification positioning and related modification work, reducing the number of iterations of the overall equipment, shortening the development cycle, and realizing efficient collaborative design. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Other objects and advantages of the present application will be apparent from the following description of the present application with reference to the accompanying drawings, which will help to provide a comprehensive understanding of the present application.

[0012] Figure 1 is a flow chart of a collaborative design method according to an embodiment of the present application;

[0013] Figure 2 is a supplementary flow chart of the collaborative design method according to an embodiment of the present application;

[0014] Figure 3It is a schematic diagram of the decomposition of functions and performances according to the embodiments of the present application;

[0015] FIG4( a) is an analysis and evaluation diagram of process verification according to an embodiment of the present application;

[0016] FIG4( b ) is an analysis and evaluation diagram of safety verification according to an embodiment of the present application.

[0017] It should be noted that, for the sake of clarity, in the drawings used to describe the embodiments of the present application, the sizes of structures or regions may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by ordinary technicians in the field. The words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0020] In this document, unless otherwise specified, directional terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the device, element or component referred to must have a specific orientation, be constructed or operate in a specific orientation. It should be understood that when the absolute position of the described object changes, the relative positional relationship they represent may also change accordingly. Therefore, these directional terms cannot be understood as limiting the present application.

[0021] The generation of design plans for reactor vessels and internal components is an important link and prerequisite for the engineering construction and safe use of fast reactors.

[0022] At present, in the design process of reactor vessels and internal components, each design discipline performs separate design based on proprietary software, and the design results are completed through manual capitalization and document delivery to complete the design interface and design coupling work. This coupling form will lead to disadvantages such as low efficiency and slow iteration, and a large amount of manpower is wasted on the coupling design iteration work.

[0023] In the design of new reactor containers and internal components, a large amount of human resources is wasted on communication, documentation and coordination management, as well as ineffective iterative design. It is common that the downstream system needs to be urgently iterated after the upstream system design is changed. Finally, due to unreasonable downstream design parameters, the upstream needs to be iterated again.

[0024] The design optimization and iteration of new reactor containers and internal components is time-consuming and cumbersome, requiring a large amount of design iteration calculations, but it is difficult to obtain the best design solution. As the application scenarios continue to change, the design requirements continue to increase. It is difficult to efficiently design a reasonable optimization solution in a short time based on the existing experience in the design of reactor containers and internal components.

[0025] Based on this, the present application provides a collaborative design method for fast reactors, which divides the whole into multiple parts, obtains the iterative requirements of multiple parts respectively, and divides the complex overall equipment development work into blocks by decomposition and splitting in stages and levels to achieve efficient collaborative design of multiple disciplines.

[0026] Figure 1 The flowchart of the collaborative design method according to the embodiment of the present application is schematically shown.

[0027] like Figure 1 As shown, this embodiment includes steps S10 to S60, and the method includes:

[0028] Step S10, determining an upstream system located upstream of the equipment to be designed of the fast reactor and related systems associated with the equipment to be designed, wherein the equipment to be designed includes a reactor vessel and reactor internals of the fast reactor.

[0029] The fast reactor is divided into blocks, which are divided into downstream systems, equipment to be designed and related systems. Among them, the downstream system needs to be designed based on the upstream system, so the design change of the upstream system will have a greater impact on the downstream system. In this application, we must first determine what the upstream systems are and accurately grasp the needs of the upstream systems, which will help reduce the iteration work of the downstream system. The related systems are highly correlated with the equipment to be designed, and at the beginning of the design, it is also necessary to grasp the needs of the related systems in advance.

[0030] Step S20, obtaining requirements of upstream systems and related systems.

[0031] The upstream system includes the reactor body and the primary cooling system. Taking this as an example, the requirements for the reactor body and the primary cooling system are as follows:

[0032] 1) During normal operation, the reactor body and the primary cooling system of the primary circuit need to remove the 1500MW of heat generated by the core to ensure the core cooling performance.

[0033] 2) Provide cooling for the components within the reactor body and the primary cooling system of the first circuit as well as the equipment to be designed, so as to ensure the mechanical performance of the system and the equipment to be designed.

[0034] 3) In the event of anticipated operating events and accident conditions, the residual heat in the core can be discharged to put the reactor in a safe state.

[0035] 4) The pressure boundary of the reactor body and the primary cooling system can form a safety barrier to contain radioactive materials.

[0036] Step S30, determining the design requirements of the equipment to be designed according to the acquired requirements of the upstream system and related systems.

[0037] According to the steady-state and transient iteration requirements of the upstream system, the equipment to be designed is divided into multiple design stages and design goals.

[0038] Step S40, according to the design requirements, the function and performance of the equipment to be designed are decomposed, and the decomposed functions include: at least one of a supporting function, a containment function, a cooling channel function, a biological shielding function and an auxiliary function; and / or the decomposed performance includes: at least one of thermal efficiency, life, safety performance, test performance and maintenance performance.

[0039] According to functional decomposition and performance decomposition, the components in the device to be designed can be divided into multiple layers, where the first-layer components are designed based on the functions and performance requirements of the device to be designed, the second-layer components are designed based on the functions and performance requirements of the first-layer components, the third-layer components are designed based on the functions and performance requirements of the second-layer components, and so on.

[0040] The embodiment of the present application provides a device to be designed with two layers of components, such as Figure 3 shown.

[0041] Step S50, designing the first layer of components included in the equipment to be designed according to the decomposed functions and performances, the first layer of components including: in-pile support components, in-pile shielding components, pump support components, pressure pipes, sodium supply pipes, in-pile ionization chamber channels, main containers, protective containers and at least one of plug protection sleeves.

[0042] like Figure 3As shown, the functional requirements of the equipment to be designed include: supporting function, containment function, cooling channel function, biological shielding function and auxiliary function; the performance requirements of the equipment to be designed include: thermal efficiency, life, safety, testing and maintenance.

[0043] Design the first layer of components based on the functional and performance requirements of the above equipment to be designed.

[0044] For example, in the support function requirements, the relevant designs of the in-pile support components, pump support components, in-pile ionization chamber channels and plug protection sleeves can be completed.

[0045] For another example, based on the thermal efficiency performance requirements, the relevant design of the ionization chamber channel within the pile can be completed.

[0046] Step S60, according to the functions and performance requirements of the first-layer components, design the second-layer components included in the equipment to be designed, the second-layer components including: at least one of a heat shielding component, an insulation layer, a sodium squeezer, a main container sodium filling and discharging pipe, a protective container discharge pipe, a hydrogen sampling purge pipe and a core melt collection device.

[0047] Design the second-layer components based on the functional and performance requirements of the first-layer components.

[0048] For example, in a supporting component within a reactor, a heat shield component may be mounted thereon.

[0049] Of course, some functional requirements and performance requirements also require design support from the second-layer components. For example, the thermal efficiency performance requirements require the joint efforts of the in-core ionization chamber channel of the first-layer components and the insulation layer of the second-layer components. The test performance requirements require the joint support of the second-layer heat shielding components, insulation layer, sodium squeezer, main container sodium filling and discharge pipes, protective container discharge pipes, hydrogen sampling and purge pipes and core melt collection devices.

[0050] According to an embodiment of the present application, the collaborative design method further includes: performing failure mode analysis and formulating evaluation criteria and material selection criteria based on the service environment and load conditions of each component of the equipment to be designed.

[0051] The service environment includes: sodium liquid, sodium vapor, argon, air, etc. The failure modes include: strength, stiffness, stability, stability, buckling, resonance, fatigue, creep, deformation, etc.

[0052] In the process of formulating evaluation criteria and material selection criteria, it is necessary to consider the interrelationships between the various components of the equipment to be designed.

[0053] The analysis and research included the long-term performance evaluation of the core melting collector, the stability evaluation of the in-core support, the flow-induced vibration screening of the in-core components, the cold and hot mixing analysis of the sodium liquid in the in-core, the probability analysis of sodium leakage in the main container, the bolt analysis of the in-core components, the flow-induced vibration analysis of the pressure tube, the fatigue crack propagation analysis of the pressure tube, and the influence analysis of the sodium liquid level fluctuation. Through the research, the typical thermal shock, special failure mode and failure probability in the fast reactor were systematically studied. In addition to the previous evaluation of the strength, stiffness, stability, dynamic thermal properties, stability, fatigue, creep, thermal deformation of the reactor container and the in-core components and the related sensitivity analysis, the technical design of the reactor container and the in-core components was fully completed.

[0054] According to an embodiment of the present application, the collaborative design method further includes: analyzing and evaluating the device to be designed according to the evaluation criteria.

[0055] In one embodiment, as shown in FIG. 4( a ) and FIG. 4( b ), process verification and safety verification are performed on the equipment to be designed, respectively.

[0056] Process verification includes verification of components such as support rings, heads, insulation layers and bellows. Relevant performance data is obtained through extreme manufacturing, and influencing factors are classified and sorted to quickly identify modification directions during the design iteration process.

[0057] In actual application, due to the large specifications and weight of fast reactor vessels and internal components, and the large proportion of large forgings in the equipment, the smelting, forging and heat treatment links have always been the key processes affecting the independence of nuclear power equipment. In order to reduce the risk of equipment service and shorten the manufacturing cycle, the support ring, head, insulation layer and bellows are all made of one-piece and weld-free technology, successfully overcoming the size effect of large forgings.

[0058] Safety verification includes verification of components such as pressure pipes, seismic devices and siphon breaking devices. Through verification, relevant performance data is obtained, possible uncertainties are analyzed, and influencing factors are classified and ranked.

[0059] Whether the structural dimensions and elevation position of the siphon destruction device are designed reasonably will affect the normal operation of the primary sodium purification system, and even in rated operation, a large amount of covering gas in the reactor vessel will be entrained into the main circulation pump and the core, causing damage to the main pump and core power oscillation. In actual application, the siphon destruction device is a non-passive special safety component in the design of fast reactor internal components. It is arranged in the in-core piping part of the primary sodium purification system. Its main function is to terminate or delay the coolant leakage process as soon as possible when a rupture accident occurs in the external piping of the primary sodium purification system of the demonstration fast reactor, so as to prevent a major loss of cooling accident and affect the safety of reactor operation.

[0060] In summary, during the analysis and evaluation process, correlation analysis of indicators is carried out for typical failure modes and key indicators. Through correlation analysis, the influencing factors are classified and sorted to quickly locate the modification direction during the design iteration process.

[0061] According to one embodiment of the present application, Figure 2 As shown, before determining the upstream system located upstream of the to-be-designed equipment of the fast reactor and the related systems associated with the to-be-designed equipment, the coordination method may further include:

[0062] Step S01, determining the overall design requirements of the fast reactor.

[0063] Step S02, according to the overall design requirements, design the matching relationship between the upstream system, the equipment to be designed and the related systems, wherein the matching relationship includes: the flow matching relationship and the resistance matching relationship between the first loop, the second loop and the third loop of the fast reactor, the first loop and the second loop are the sodium loops of the fast reactor, and the third loop is the water loop of the fast reactor.

[0064] Step S03, configuring the upstream system, the equipment to be designed and the related systems according to the overall design requirements and matching relationships.

[0065] According to the national strategic development needs, the overall technical indicators and military and economic goals of fast reactors are formulated as the overall design requirements. According to the overall needs of the reactor, the reactor is decomposed into upstream systems, equipment to be designed and related systems. Each of the upstream systems, equipment to be designed and related systems contains multiple devices and multiple components, and each system has corresponding functions. The relationship between the upstream system, equipment to be designed and related systems is established to implement rapid iteration.

[0066] According to the collaborative design method of the present application, large and complex equipment with multiple parameters is split into multiple parts, and the core requirements of each part are used as the iteration direction, which is conducive to quickly completing the modification positioning and related modification work, reducing the number of iterations of the overall equipment, shortening the development cycle, and realizing efficient collaborative design.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0068] Although some embodiments according to the overall technical concept of the present application have been shown and described, those skilled in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the overall technical concept of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A collaborative design method for a fast reactor, characterized in that: The method comprises: Determining an upstream system located upstream of a device to be designed of a fast reactor and a related system associated with the device to be designed, wherein the device to be designed includes a reactor vessel and reactor internals of the fast reactor; Obtaining requirements of the upstream system and the related systems; Determining design requirements of the device to be designed according to the acquired requirements of the upstream system and the related systems; According to the design requirements, perform functional decomposition and performance decomposition on the device to be designed; Designing the first-layer components of the device to be designed according to the decomposed functions and performances; and According to the functions and performance requirements of the first-layer components, the second-layer components included in the device to be designed are designed.

2. The collaborative design method according to claim 1, characterized in that: The method further comprises: performing failure mode analysis and formulating evaluation criteria and material selection criteria according to the service environment and load conditions of each component of the equipment to be designed.

3. The collaborative design method according to claim 2, characterized in that: In the process of formulating the evaluation criteria and material selection criteria, the interrelationships between the various components of the equipment to be designed are taken into consideration.

4. The collaborative design method according to claim 2 or 3, characterized in that: The method further includes: analyzing and evaluating the equipment to be designed according to the evaluation criteria.

5. The collaborative design method according to claim 1, characterized in that: The decomposed functions include: at least one of a support function, a containment function, a cooling channel function, a biological shielding function and an auxiliary function; and / or The decomposed performance includes at least one of thermal efficiency, lifespan, safety performance, test performance and maintenance performance.

6. The collaborative design method according to claim 1, characterized in that: The first layer of components includes: at least one of an in-pile support component, an in-pile shield component, a pump support component, a pressure pipe, a sodium supply pipe, an in-pile ionization chamber channel, a main container, a protection container, and a plug protection sleeve; and / or The second layer of components includes at least one of a heat shielding component, a heat preservation layer, a sodium squeezer, a main container sodium filling and discharging pipe, a protection container discharge pipe, a hydrogen sampling purge pipe and a core melt collection device.

7. The collaborative design method according to claim 1, characterized in that: Before determining an upstream system located upstream of the equipment to be designed of the fast reactor and a related system associated with the equipment to be designed, the method further includes: determining the overall design requirements for the fast reactor; According to the overall design requirements, design the matching relationship between the upstream system, the device to be designed and the related system; and The upstream system, the equipment to be designed and the related systems are configured according to the overall design requirements and the matching relationship.

8. The collaborative design method according to claim 7, characterized in that: The matching relationship includes: a flow matching relationship and a resistance matching relationship between the first loop, the second loop and the third loop of the fast reactor, The first loop and the second loop are sodium loops of the fast reactor, and the third loop is a water loop of the fast reactor.

9. The collaborative design method according to claim 1, characterized in that: Before performing functional decomposition and performance decomposition on the device to be designed according to the design requirements, the method further includes: According to the steady-state and transient iteration requirements of the upstream system, the design phases are divided and the design objectives of each design phase are determined.

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