CN207038191U - Core component inlet nozzle - Google Patents

Abstract

A kind of core component inlet nozzle is the utility model is related to, the core component inlet nozzle includes nose, and the nose has the pillar extended from.The truncated cone is configured with the opposite end relative with nose of pillar, and hexagon body extends from the cone.Internal flow chamber connects with the window limited by pillar.Each of nose, pillar, cone, hexagon body and internal flow chamber align along inlet nozzle axis.

Description

Core component inlet nozzle

Technical field

It the utility model is related to nuclear reaction field, more particularly to a kind of core component inlet nozzle.

Background technology

Fission-type reactor includes propagation-burning fast reaction heap (also referred to as traveling wave reactor, or TWR).TWR refer to by It is designed to use natural uranium, depleted uranium, light-water reactor spentnuclear fuel or thorium indefinitely to transport as heavily loaded fuel after starting Turn and wherein propagation and with the reactor that will be advanced relative to fuel of ripple of after-combustion.Therefore, in some respects, TWR be according to Lai Yu breeds the through type fast reaction heap of the subcritical heavily loaded operating fuel to upstate and combustion in situ.In TWR, increase Grow and central core of the ripple of fissioning (" propagation-combustion wave ") originating from reactor in and move relative to fuel.It is quiet in fuel In the case of only, propagation and combustion wave are from burning-point to external expansion.In some cases, fuel is moveable so as to breed and burnt Ripple moves relative to core body static (for example, standing wave) but relative to fuel；Standing wave should be considered as a kind of TWR.The shifting of fuel assembly It is dynamic to be referred to as " fuel exchange (fuel shuffling) " and standing wave be completed, this be to reactor characteristic (heat, flux, power, Fuel combustion etc.) regulation.The central core that wherein fuel assembly is switched is configured in reactor vessel.Fuel assembly includes Fission nuclear fuel component and the nuclear fuel assembly that fissile material can be produced.It may also be configured with central core for adjusting reaction The reaction controlling component of heap characteristic.

The fission energy limited by standing wave forms heat energy, and the heat energy is through one or more Main Coolant loops and centre Coolant loop is continuously delivered to steam generator to generate electricity, and Low Temperature Thermal is arranged by one group of water-cooled vacuum condenser Go out.Coolant system is separated into Main Coolant loop and intercoolant loop helps to maintain core body and Main Coolant loop Integrality.In TWR, Main Coolant loop and intercoolant loop are both using Liquid Sodium as cooling agent.

Utility model content

On the one hand, technology of the present utility model is related to a kind of core component inlet nozzle, and it has：Nose；From nose The pillar of shape portion extension, the wherein pillar have stage portion, and diameter of its B-C post in the first side of stage portion exists less than pillar The diameter of second side of stage portion, and its B-C post limits window；Cone, the cone, which has, configures in pillar and nose The truncated cone of relative one end；From the hexagon body of cone extension, its B-C post, cone and hexagon body limit and window The internal flow chamber being in fluid communication, and wherein in nose, pillar, cone, hexagon body and internal flow chamber Each is all alignd along inlet nozzle axis.In one example, window includes multiple windows with internal flow chamber. In another example, pillar limits the first circumferential grooves close to nose configuration and the second circumferential groove close to cone configuration Groove.In another example, the opposite sides of the first circumferential grooves and the second circumferential arrangements of grooves in the multiple window.Another again In one example, cone has the diameter bigger than the diameter of pillar.

In another example of above-mentioned aspect, one end relative with cone of hexagon body limits multiple slits.One In individual example, the opposite sides of hexagon body limits a pair of jam plate grooves, and wherein jam plate groove is more than every in the multiple slit One.In another example, core component inlet nozzle also includes the Hexagonal tube engaged with hexagon Ontology Matching. In yet another example, core component inlet nozzle also includes being used for the carrying being fixed on Hexagonal tube on hexagon body Ring and snap ring.In yet another example, hexagon body limits circular in one end relative with cone of hexagon body Opening, the wherein circular open and internal flow chamber.In another example, the flowing in hexagon body is configured Chamber is tapered to the minimum diameter at cone from the maximum gauge of close opening.

Brief description of the drawings

Below form the application a part accompanying drawing be for described technology it is illustrative and be not intended to Any mode limits the scope for the technology for requiring patent right, and the scope should be based on claim appended herein.

Fig. 1 shows some basic building blocks of traveling wave reactor in form of a block diagram.

Fig. 2 is the schematic cross sectional views of the core body of traveling wave reactor.

Fig. 3 is the exploded view of core component.

Fig. 4 is the perspective view of core component inlet nozzle.

Fig. 5 is inlet nozzle and the amplification view at core body supporting structure interface.

Embodiment

Fig. 1 shows some basic building blocks of traveling wave reactor (TWR) 100 in form of a block diagram.In general, TRW100 includes Accommodate the reactor core body 102 of multiple fuel assembly (not shown).Core body 102, which configures, is keeping the liquid sodium cooling of certain volume In the pond 104 of agent 106.Pond 104 is referred to as hot pond and with higher than also accommodating surrounding's cold drop 108 of Liquid Sodium cooling agent 106 Sodium temperature (being attributed to by energy caused by the fuel assembly in reactor core body 102).Hot pond 104 is (interior by boss portion Portion's container, redan) 110 separated with cold drop 108.The headroom 112 of the ullage of sodium cooling agent 106 is filled with such as argon The inert protective gas of gas.Reactor vessel 114 (containment) surrounds reactor core body 102, hot pond 104 and cold drop 108, and Sealed using reactor lid 116.Reactor lid 116 provides the various maintenance points led in the inside of reactor vessel 114.

The size of reactor core body 102 is selected based on Multiple factors, including the characteristic of fuel, desired generated energy, can For space of reactor 100 for using etc..TWR various examples as needed or can it is expected to be used for low-power (about 300MW_e- about 500MW_e), middle power (about 500MW_e- about 1000MW_e) and high power (about 1000MW_eMore than) application in.Can be by core body 102 surroundings set unshowned one or more reflectors to return to neutron reflection in core body 102 to improve reactor 100 Performance.In addition, can produce fissile material and fissible nuclear component moved in the core body 102 and around it (or " switching ") with Control the nuclear reaction wherein occurred.

Sodium cooling agent 106 circulates via main sodium cooling agent pump 118 in container 114.Main coolant pump 118 is from cold drop 108 Aspirate sodium cooling agent 106 and it is ejected into pumping chamber (plenum) below reactor core body 102.Cooling agent the last 106 Make upwardly through core body and be heated due to the reaction occurred in reactor core body 102.The cooling agent 106 of heating is from Re Chi 104 enter (one or more) intermediate heat exchanger 120, and leave intermediate heat exchanger 120 and reenter cold drop 108. This Main Coolant loop 122 thus makes sodium cooling agent 106 be circulated completely in reactor vessel 114.

Intermediate heat exchanger 120 combines and is physically separate from all the time with main sodium pond 104 and 108 that (that is, intermediate sodium and main sodium be forever Far from fusion) one section of Liquid Sodium closed loop.Heat (is fully accommodated in by intermediate heat exchanger 120 from Main Coolant loop 122 In container 114) it is delivered to intercoolant loop 124 (being positioned only part in container 114).Intermediate heat exchanger 120 passes through Elbows 110, so as to bridge hot pond 104 and cold drop 108 (to allow the sodium 106 in Main Coolant loop 122 to flow therebetween It is dynamic).In one example, four intermediate heat exchangers 120 are distributed in container 114.Or heat exchange among two or six Device 120 is distributed in container 114.

Intercoolant loop 124 makes the sodium cooling agent 126 through pipeline disengaging container 114 be followed via reactor lid 116 Ring.Middle sodium pump 128 positioned at the outside of reactor vessel 114 circulates sodium cooling agent 126.Heat is from Main Coolant loop 122 Sodium cooling agent 106 be delivered to the sodium cooling agent 126 of the intercoolant loop 124 in intermediate heat exchanger 120.Cooling during rolling The sodium cooling agent 126 of agent loop 124 is by multiple pipes 130 in intermediate heat exchanger 120.These pipes 130 keep Main Coolant The sodium cooling agent 106 of loop 122 separates with the sodium cooling agent 126 of intercoolant loop 124, while transmits heat therebetween Energy.

Direct heat exchanger 132 extends into hot pond 104 and generally in case of emergency into Main Coolant loop 122 Sodium cooling agent 106 provide cooling.Direct heat exchanger 132 is configured to allow for sodium cooling agent 106 to be entered and left from hot pond 104 Heat exchanger 132.Direct heat exchanger 132 has the structure similar to intermediate heat exchanger 120, wherein the pipe 134 is kept The NaK (sodium-potassium) of Main Coolant loop 122 and the direct heat exchanger cooling agent (NaK) of direct reactor coolant loop 138 136 separate, while transferring heat energy therebetween.

(in the reactor vessel 114 and outside reactor vessel 114) other assisted reaction pile elements include But it is not limited to be not shown but obvious pump, check-valves, stop valve, flange, discharge launder to those skilled in the art Deng.Through reactor lid 116 other through hole (for example, port, inert protective gas for main refrigerant pump 118 Port, protective gas port etc. are handled with inspection port, sodium) it is not shown.Control system 140 is used to controlling and monitoring anabolic reaction The various components and system of heap 100.

Broadly, the present disclosure describes the configuration for the performance for improving the reactor 100 described in Fig. 1.Specifically, in core body Example, configuration and the arrangement of the middle core component inlet nozzle used are illustrated and retouched in more detail below with reference to figure below State.

Fig. 2 is the schematic cross sectional views of the core body 200 of traveling wave reactor.Core body 200 be schematically shown and including Central core region 202 with multiple core components 204.Core component 204 may include fissible nuclear fuel assembly, can produce The nuclear fuel assembly of raw fissile material, shield assembly, reflector assembly, control assembly and standby close down component or testing of materials group Part.In general, the content (for example, fissile material, control material etc.) of component determines specific components.However, each component This material of holding component it is identical.Periphery core area 206 includes container inner storage tank 208.Through the life-span of core body 200, Fissible nuclear fuel assembly and the nuclear fuel assembly (and some other components) of fissile material can be produced in central core area Switched between domain 202 and periphery core area 206.This performs in each stage in core body life-span to start on demand or on request, Maintain, accelerate or terminate nuclear reaction or generating and/or for security consideration.

Core component 204 is supported by the upper plate 210 of core body supporting structure 212.Sodium cooling agent is pumped into configuration in upper plate In the pumping chamber 214 of 210 lower sections and flow upward to core component 204, herein it by the nuclear reaction that occurs in core body 200 and by Heating.Description guiding sodium stream passes through core body 202 and the structure of various assemblies below.

Fig. 3 is the exploded view of core component 300.Core component 300 includes the elongated pipeline 302 with axis A.Pipeline 302 have hexagonal cross-section.Manipulation socket 304 with internal flow passageway is fixed in the first end 306 of pipeline 302, and And with allowing to grasp it by the mechanism in reactor vessel to be lifted, fallen and otherwise move core component 300 The internal or external feature structure moved in core body, removed from core body or moved in core body.Inlet nozzle 308 is fixed on pipeline On 302 the second end 310.Multiple load-carrying rings 312 and snap ring 314 are used to that socket 304 will to be manipulated and inlet nozzle 308 is attached to pipe Road 302.Include multiple jam plates 316 (being two in this example) and multiple rod rail (pin in the adjacent one end of inlet nozzle 308 strip rails)318.Jam plate 316 and rod rail 318 in fuel assembly jointly by fuel bundle 320 (if for example existed If) be connected with inlet nozzle 308.It also show sealing ring 322 and current limiter 324.It is for example more detailed in figures 4 and 5 below Ground describes the configuration of Exemplary portals ozzle.

Fig. 4 is the perspective view of the core component inlet nozzle 400 of usually integral structure.Ozzle 400 includes nose 402 and the ozzle pillar 404 that extends from.Nose 402 can be conical, sharp, or including allowing ozzle 400 to be located at Further feature structure in core body supporting structure.Interface cone is configured with one end relative with nose 402 of ozzle pillar 404 Body 406, and it is configured with hexagon body 408 in the wide end of interface cone 406.Interface cone 406 is cut into hexagon, but It is contemplated that other shapes.Each of nose 402, pillar 404, interface cone 406 and hexagon body 408 are along axis A aligns.Pillar 404 limits multiple windows 410 as coolant entrance, specifically there is six windows in shown ozzle 400 410.Window 410 is in fluid communication with extending through the internal flow chamber 412 of pillar 404, cone 406 and hexagon body 408. Therefore, window 410 provides the road for flowing into inlet nozzle 400 for sodium cooling agent and flowing through internal flow chamber 412 then up Footpath.The opening 414 that sodium cooling agent limits from one end by hexagon body 408 flows out and flow ipe (not shown) is to configure Flowed around cluster therein.

Figure 4 illustrates the further feature of ozzle 400.For example, two circumferential grooves 416 above the window 410 and under Side's configuration is around pillar 404.Lower groove 416a configures close to nose 402, and upper groove 416b configures close to cone 406. Groove 416 is configured to receive the seal 322 shown in Fig. 3.Stage portion 418 just expands pillar below upper groove 416b 404 diameter so that diameter of the pillar 404 above stage portion 418 is more than diameter of the pillar 404 below stage portion 418.Should Position that the expansion of diameter helps to prevent in inlet nozzle 400 to be disposed to the socket being described further below (or from its Remove) when damage sealing ring 322 (Fig. 3).Interface between cone 406 and hexagon body 408 is formed with lip 420. Interface cone 406 has the diameter bigger than pillar 404.Lip 420 is configured in the second end that inlet nozzle 400 inserts pipeline Second end of Shi Zhicheng pipelines.Inlet nozzle 400 limits multiple mechanical sockets 422 in hexagon body 408, for by pipeline It is fixed on inlet nozzle 400 (for example, using load-carrying ring and snap ring shown in Fig. 3).In this example, three mechanical sockets be present 422, each mechanical receptacle compartment is opened 120 degree (for example, in hexagon bodies 408 every on a face).Hexagon body 408 is also Limit the passage 424 for receiving current limiter coil pipe.Multiple rod rail slits 426 are limited simultaneously by the upper end of hexagon body 408 And it is configured to receive rod rail shown in Fig. 3.These rod rails support cluster and allow sodium to flow out and flow into from inlet nozzle 400 In pipeline.Jam plate groove 428 is configured to receive the jam plate shown in Fig. 3 so as to which rod rail is held in place by.

Fig. 5 is inlet nozzle and the sectional view at core body supporting structure interface 500.Fig. 5 shows inlet nozzle 400 in Fig. 3 institutes It is in place and engage in the socket 502 of the core body supporting structure shown.The base portion 504 of socket 502 limits offer and leads to static state instead Answer the path 505 of the flow path for sodium in heap sodium pond.In addition, path 505 provide in inlet nozzle 400 from socket 502 suctions that may occur when being removed are released, and pressure when inlet nozzle 400 feel relieved wherein discharges.Socket 502 Including allowing two conical surfaces 506,508 in place wherein of inlet nozzle 400.The lower conical surface 506 allows inlet nozzle 400 to be easier It is positioned in socket 502, and the upper conical surface 508 engages with cone 406.Fig. 5 also illustrates that pipeline 302 utilizes load-carrying ring 312 and snap ring 314 matchingly engage with inlet nozzle 400.Bypass current limiter coil pipe 324 rests on lip 420 at the second end 310 of pipeline 302 Bypass stream when upper between restriction conduit 302 and inlet nozzle 400.Jam plate 316 and rod rail 318 are also shown as, so as to provide Position is rested against for cluster (not shown) of the configuration in pipeline 302.

When inlet nozzle 400 is in place in socket 502 as shown in Figure 5, the sodium stream passed through from path 505 is limited. In the state of sealing ring limit path 505, cooling agent aperture 510 of the sodium stream from configuration around the base portion 504 of socket 502 is logical Cross.Sodium stream continues to flow up and flowed into the window 410 of pillar 404 around socket base 504.Sealing ring 322 prevents not The flowing of desired sodium, so as to prevent inlet nozzle 400 due to the elevated pressure in interface cone 406 and nose 402 and from Socket 502 is forced out.Sodium stream instead continues on through window 410 and flowed into internal flow chamber 412, and is passing through jam plate 316 Flowed up before being discharged to rod rail 318 and from opening 414 in pipeline 302 in inlet nozzle 400.In this example, it is interior Portion's flow chamber 412 limits in the opening position of the cone 406 of inlet nozzle 400 has the first diameter D₁Conical configuration.It is larger Second bobbin diameter D₂At opening 414.Larger opening 414 allows na expansion and flows out to configure from inlet nozzle 400 to exist Around cluster (not shown) in pipeline 302.

It should be understood that the disclosure is not limited to concrete structure, processing step or material disclosed herein, but extend to association area Skilled artisan will realize that their equivalent.It should also be understood that term used herein has merely for the sake of description The purpose of body embodiment, and be not intended to be limited.It must be noted that as used in this manual, singulative " one ", "one" and it is " described " include plural number reference, unless separately expressly stating otherwise within a context.

It is evident that system and method described herein be well suited for realizing the objects and advantages mentioned and Wherein intrinsic objects and advantages.Those skilled in the art will recognize that the method and system in this specification can be used and permitted Multimode is implemented and therefore should not limited by the embodiment and example of foregoing illustrative.In this respect, it is described herein different real Any number of feature for applying example is combined into one embodiment and with more than whole features described herein or few spy The alternate embodiment of sign is possible.

Although describing various embodiments for the purpose of this disclosure, various changes and modifications can be made, its is same In the scope contemplated by the disclosure.Those skilled in the art can be made to will readily appreciate that and covered in the disclosure Spirit in many other changes.

Claims (11)

1. A kind of 1. core component inlet nozzle, it is characterised in that including：

   Nose；

   From the pillar of nose extension, wherein the pillar includes stage portion, wherein the pillar is in the stage portion The diameter of first side is less than diameter of the pillar in the second side of the stage portion, and wherein described pillar limits window；

   Cone, the cone include the truncated cone of the configuration in one end relative with the nose of the pillar；

   The hexagon body extended from the cone,

   Wherein, the pillar, the cone and the hexagon body limit the internal flow chamber being in fluid communication with the window Room, and

   Wherein, it is every in the nose, the pillar, the cone, the hexagon body and the internal flow chamber One is alignd along inlet nozzle axis.
2. 2. core component inlet nozzle according to claim 1, it is characterised in that the window includes and the inside stream Multiple windows of dynamic chamber.
3. 3. core component inlet nozzle according to claim 2, it is characterised in that the pillar is limited close to the nose The first circumferential grooves and the second circumferential grooves close to cone configuration of shape portion configuration.
4. 4. core component inlet nozzle according to claim 3, it is characterised in that first circumferential grooves and described Two circumferential grooves configure the opposite sides in the multiple window.
5. 5. core component inlet nozzle according to claim 1, it is characterised in that the cone has than the pillar The big diameter of diameter.
6. 6. core component inlet nozzle according to claim 1, it is characterised in that the hexagon body with the cone One end of body phase pair limits multiple slits.
7. 7. core component inlet nozzle according to claim 6, it is characterised in that the opposite sides of the hexagon body A pair of jam plate grooves are limited, wherein the jam plate groove is more than each in the multiple slit.
8. 8. core component inlet nozzle according to claim 1, it is characterised in that also include and the hexagon body Hexagonal tube with ground engagement.
9. 9. core component inlet nozzle according to claim 8, it is characterised in that also include being used for the hexagonal tube Road is fixed on load-carrying ring and snap ring on the hexagon body.
10. 10. core component inlet nozzle according to claim 1, it is characterised in that the hexagon body is described six One end relative with the cone of side shape body limits the opening of circular, wherein the opening and the internal flow chamber Room connects.
11. 11. core component inlet nozzle according to claim 10, it is characterised in that configuration is in the hexagon body Flow chamber minimum diameter at the cone is tapered to from the maximum gauge close to the opening.