CN206097930U

CN206097930U - Built -in water tank that reloads of nuclear power station containment

Info

Publication number: CN206097930U
Application number: CN201621031663.0U
Authority: CN
Inventors: 侯建飞; 赵延辉; 唐睿; 高亚甫
Original assignee: China General Nuclear Power Corp; China Nuclear Power Engineering Co Ltd
Current assignee: China General Nuclear Power Corp; China Nuclear Power Engineering Co Ltd
Priority date: 2016-08-31
Filing date: 2016-08-31
Publication date: 2017-04-12
Anticipated expiration: 2026-08-31

Abstract

The utility model discloses a built -in water tank that reloads of nuclear power station containment, including outer loop and inner ring, wherein, be equipped with on the endocyclic outer wall and mix the pipeline in a plurality of, be equipped with a plurality of on the internal face of outer loop or the outer wall and mix the pipeline outward, mix the outer distribution of pipe opposite direction that mixes of pipeline and outer loop in just endocyclic. The utility model discloses among the built -in water tank that reloads of nuclear power station containment, when mixing the pipeline and putting into operation simultaneously, the inner and outer ring fluid is whole realizes that directed annular flows, can realize that the high efficiency in the built -in water tank flow field of reloading of whole containment is mixed when inside and outside, and the homogeneity in full flow field is good.

Description

The built-in material-changing water tank of nuclear power plant containment shell

Technical field

The utility model belongs to technical field of nuclear power, and more specifically, the utility model is related to one kind and mixes with ideal The built-in material-changing water tank of nuclear power plant containment shell of effect.

Background technology

Nuclear power station is required for substantial amounts of boron water, material-changing water tank to can be used to store a large amount of boracics in the operation of normal and accident Water, is the important safe items of nuclear power station.According to the difference of position, the material-changing water tank of pressurized-water reactor nuclear power plant is divided into containment External material-changing water tank and the built-in material-changing water tank of containment.

At present, two generation pressurized-water reactor nuclear power plants generally adopt external design, the melt pit of containment bottom to can be used to collect safety Water leakage and shower water in shell is so as to recycled.Under nominal situation, the water remains stationary in melt pit is motionless.Accident conditions Under, the recycling stage can be just switched to when only material-changing water tank water level is low to fetch water from melt pit.But, existing two generations presurized water reactor Do not there is provided in nuclear power station melt pit and mix setting.

At present, part three generations nuclear power technology adopts the built-in material-changing water tank of containment (abbreviation IRWST), and material-changing water tank is arranged in The reactor building bottom.Material-changing water tank is in monocyclic arrangement, and left and right two parts are arranged symmetrically, and is disposed with material-changing water tank tangential Pipeline is mixed with radial direction, pipeline is tangentially mixed for 4 and is arranged in outer side surface, one group radially mixing pipeline is arranged in interior sidewall surface.

In nuclear power station during normal operation, need to be sampled monitoring to the water in IRWST, at this time, it may be necessary to enter IRWST Row is mixed, and mixes the accuracy that effect directly influences sampling monitoring.Under accident conditions, IRWST has multiple water sources, in order to protect The safe operation of card nuclear power station, prevents IRWST downstream users from occurring dilution because sucking boron water, needs also exist for entering IRWST Row is mixed, and mixes the reactivity that effect directly influences reactor core.

In view of this, it is necessary to which a kind of built-in material-changing water tank of nuclear power plant containment shell for mixing effect with ideal is provided.

Utility model content

The purpose of this utility model is：Overcome the deficiencies in the prior art, there is provided a kind of core that effect is mixed with ideal The built-in material-changing water tank of power plant safety shell.

To achieve these goals, the utility model provides a kind of nuclear power plant containment shell built-in material-changing water tank, and it includes outer Ring and inner ring, wherein, the outside wall surface of inner ring be provided with mix pipeline, the internal face or outside wall surface of outer shroud are provided with outer mixes pipe Line, and inner ring in mix pipeline contrary with the outer arranged direction for mixing pipeline of outer shroud.

Improve as one kind of the built-in material-changing water tank of the utility model nuclear power plant containment shell, in the outside wall surface of the inner ring Inside mix pipeline to arrange along counter clockwise direction, outer on the internal face or outside wall surface of the outer shroud mixes pipeline along clockwise Direction is arranged.

Improve as one kind of the built-in material-changing water tank of the utility model nuclear power plant containment shell, in the outside wall surface of the inner ring Inside mix pipeline to arrange clockwise, outer on the internal face or outside wall surface of the outer shroud mixes pipeline along counterclockwise Direction is arranged.

Improve as one kind of the built-in material-changing water tank of the utility model nuclear power plant containment shell, in the outside wall surface of the inner ring Even being distributed with 3-5 roots mixes pipeline, is evenly distributed with the internal face or outside wall surface of the outer shroud outside 2-4 roots and mixes pipeline.

Improve as one kind of the built-in material-changing water tank of the utility model nuclear power plant containment shell, in the inner ring or outer ring The inside and outside upper height limit for mixing pipeline apart from the built-in material-changing water tank bottom surface of containment is the built-in material-changing water tank depth of water of containment 60%, lower limit is the 40% of the built-in material-changing water tank depth of water of containment.

Improve as one kind of the built-in material-changing water tank of the utility model nuclear power plant containment shell, in the inner ring pipeline is mixed Be 30 °～60 ° with the tangential angle of inner ring, it is described per root in mix pipeline and inner ring tangential angle it is identical or different.

Improve as one kind of the built-in material-changing water tank of the utility model nuclear power plant containment shell, the outer of the outer shroud mixes pipeline It it is 0 °～30 ° with the tangential angle of outer shroud, described each outer tangential angle for mixing pipeline and outer shroud is identical or different.

Improve as one kind of the built-in material-changing water tank of the utility model nuclear power plant containment shell, the built-in water that reloads of the containment Case is provided with filter and is detained basket, and the inside and outside pipe inserting of mixing is arranged in adjacent filter and is detained between basket.

Compared with prior art, there are the built-in material-changing water tank of the utility model nuclear power plant containment shell following Advantageous to imitate Really：When inside and outside pipeline is mixed while when putting into operation, IRWST inner and outer rings fluid integrally realizes the annularly flow for orienting, it is possible to achieve whole Individual IRWST flow fields are efficiently mixed, and the uniformity of whole flow field is preferable.It is arranged such, it is ensured that IRWST water samplings under nominal situation As a result accuracy, by the effect of mixing for ensureing IRWST, improves the temperature and the uniformity of concentration of boron water in IRWST；Can Ensure the reactivity control of reactor core under accident conditions, by ensureing that IRWST's mixes effect, IRWST downstream users can be prevented The dilution of suction boron water, it is to avoid reactor core reactivity is impacted, it is ensured that the safe operation of nuclear power station.

Description of the drawings

With reference to the accompanying drawings and detailed description, to the built-in material-changing water tank of the utility model nuclear power plant containment shell and its have Beneficial technique effect is described in detail.

Fig. 1 is the structural representation of the built-in material-changing water tank of the utility model nuclear power plant containment shell.

Specific embodiment

In order that the purpose of this utility model, technical scheme and technique effect become apparent from understanding, below in conjunction with accompanying drawing and Specific embodiment, is further elaborated to the utility model.It should be appreciated that concrete described in this specification Embodiment is not intended to limit the utility model just for the sake of explaining the utility model.

Refer to shown in Fig. 1, be the structural representation of the built-in material-changing water tank of the utility model nuclear power plant containment shell, it is bag Include the bicyclic pond of inner ring 10 and outer shroud 20, wherein, the outside wall surface of inner ring 10 be provided with mix pipeline 100, the inwall of outer shroud 20 Face or outside wall surface mix pipeline 200 outside being provided with, and pipeline 100 is mixed in inner ring 10 and mixes the cloth of pipeline 200 with the outer of outer shroud 20 Put in opposite direction.

It is disposed with the outside wall surface of inner ring 10 in several and mixes pipeline 100 (for example, mixing pipeline for 3～5), inside stirs Mixed pipeline 100 is circumferentially uniformly distributed in the outside wall surface of inner ring 10, in the outside wall surface of inner ring 10 in mix pipeline 100 Arrangement need to avoid mixing fluid and directly wash away filter and be detained the equipment (as shown in each square frame 30 in Fig. 1) such as basket.In figure In showing embodiment, per root in mix the tangential angle α of pipeline 100 and inner ring be 30 °～60 °, per root in mix pipeline 100 Can be adjusted according to the actual arrangement situation of equipment in IRWST with different from the tangential angle of inner ring.Additionally, inner ring 10 It is the 60% of the IRWST depth of waters that upper height limit of the pipeline 100 apart from IRWST bottom surfaces is mixed in outside wall surface, and lower limit is IRWST water Deep 40%.

Several are arranged on the internal face or outside wall surface of outer shroud 20, and outward mixing pipeline 200 (for example, mixes pipe for 2～4 Line), the internal face or outside wall surface that pipeline 200 is mixed outward in outer shroud 20 is circumferentially uniformly distributed, the internal face of outer shroud 20 or outer The outer arrangement for mixing pipeline 200 on wall need to avoid mixing fluid and directly wash away filter and be detained the equipment such as basket.In diagram In embodiment, per root outside to mix the tangential angle β of pipeline 200 and outer shroud be 0 °～30 °, each is outer mix pipeline 200 with The tangential angle of outer shroud can be adjusted according to actual needs with difference.Additionally, mixing pipeline 200 outward apart from IRWST bottom surfaces Upper height limit for the IRWST depth of waters 60%, lower limit for the IRWST depth of waters 40%.

In the shown embodiment, the interior quantity of pipeline 100 of mixing of inner ring 10 is to mix pipeline 100 in 4,4 to arrange Between adjacent equipment (square frame in figure), pipeline 1/2/3/4 and the tangential α 3/ of 1/ α of angle α 2/ of inner ring are mixed in inner ring 10 α 4 is respectively 45 °/60 °/45 °/30 °.The outer pipeline 200 of mixing of outer shroud 20 for 3, per root outside mix pipeline 200 and be tangentially Arrangement, the i.e. β 3 of 1/ β of β 2/ are 0 °.

It should be noted that in the shown embodiment, pipeline 100 is inside mixed in distribution counterclockwise, pipeline 200 is mixed outward In distribution clockwise.But, according to other embodiment of the present utility model, inside mixing pipeline 100 can be distributed in clockwise, The correspondence of pipeline 200 is mixed outward in distribution counterclockwise, as long as mixing the arrangement mode of pipeline 200 outward with the interior row for mixing pipeline 100 Row mode is contrary.

Describe in detail as can be seen that relative to prior art, the utility model nuclear power to of the present utility model with reference to more than The built-in material-changing water tank of containment of standing at least has following beneficial technique effect：

When inside and outside pipeline 100,200 is mixed while when putting into operation, IRWST inner and outer rings fluid integrally realizes the annular flow for orienting It is dynamic, it is possible to achieve whole IRWST flow fields are efficiently mixed, and the uniformity of whole flow field is preferable.It is arranged such, it is ensured that nominal situation The accuracy of lower IRWST water sampling results, by ensureing that IRWST's mixes effect, improves in IRWST the temperature of boron water and dense The uniformity of degree；Ensure the reactivity control of reactor core under accident conditions, by ensureing that IRWST's mixes effect, can prevent IRWST downstream users suck the dilution of boron water, it is to avoid reactor core reactivity is impacted, it is ensured that the safe operation of nuclear power station.

According to above-mentioned principle, the utility model can also carry out appropriate change and modification to above-mentioned embodiment.Therefore, The utility model is not limited to specific embodiment disclosed and described above, to some modifications and changes of the present utility model Should also be as falling in scope of the claims of the present utility model.Although additionally, some are specific used in this specification Term, but these terms are merely for convenience of description, do not constitute any restriction to the utility model.

Claims

1. the built-in material-changing water tank of a kind of nuclear power plant containment shell, it includes outer shroud and inner ring, it is characterised in that：The outer wall of the inner ring Face is provided with several mixes pipeline, and the internal face or outside wall surface of the outer shroud are provided with outside several mixes pipeline, and interior It is contrary with the outer arranged direction for mixing pipeline of outer shroud pipeline to be mixed in ring.

2. the built-in material-changing water tank of nuclear power plant containment shell according to claim 1, it is characterised in that：The outside wall surface of the inner ring On in mix pipeline and arrange along counter clockwise direction, outer on the internal face or outside wall surface of the outer shroud mixes pipeline along suitable Clockwise is arranged.

3. the built-in material-changing water tank of nuclear power plant containment shell according to claim 1, it is characterised in that：The outside wall surface of the inner ring On in mix pipeline and arrange clockwise, outer on the internal face or outside wall surface of the outer shroud mixes pipeline along inverse Clockwise is arranged.

4. the built-in material-changing water tank of nuclear power plant containment shell according to claim 1, it is characterised in that：The outside wall surface of the inner ring On be evenly distributed with 3-5 roots and mix pipeline, be evenly distributed with the internal face or outside wall surface of the outer shroud outside 2-4 roots and mix pipe Line.

5. the built-in material-changing water tank of nuclear power plant containment shell according to claim 1, it is characterised in that：In the inner ring or outer ring The inside and outside upper height limit for mixing pipeline apart from the built-in material-changing water tank bottom surface of containment for the built-in material-changing water tank depth of water of containment 60%, lower limit is the 40% of the built-in material-changing water tank depth of water of containment.

6. the built-in material-changing water tank of nuclear power plant containment shell according to claim 1, it is characterised in that：Mix in the inner ring The tangential angle of pipeline and inner ring is 30 °～60 °, it is described per root in mix pipeline and inner ring tangential angle it is identical or not Together.

7. the built-in material-changing water tank of nuclear power plant containment shell according to claim 1, it is characterised in that：The outer of the outer shroud is mixed The tangential angle of pipeline and outer shroud is 0 °～30 °, and described each outer tangential angle for mixing pipeline and outer shroud is identical or not Together.

8. the built-in material-changing water tank of nuclear power plant containment shell according to claim 1, it is characterised in that：Displacement in the containment Material water tank is provided with filter and is detained basket, and the inside and outside pipe inserting of mixing is arranged in adjacent filter and is detained between basket.