阅读说明：本技术 安注水保护装置及具有其的反应堆 (safety water protection device and reactor with same ) 是由 张鹏 何丹丹 董博 苑皓伟 孙琼华 胡服全 刘丽芳 崔蕾 孔晓宁 费立凯 傅孝良 于 2019-09-12 设计创作，主要内容包括：本发明公开了一种安注水保护装置及具有其的反应堆,包括：本体,所述本体安装于反应堆吊篮的外侧；遮挡板,所述遮挡板与所述本体的边沿相连,且所述遮挡板沿第一方向凸出于所述本体；引流板,所述引流板与所述本体的下边沿相连且从上到下向所述第一方向倾斜延伸。根据本发明的安注水保护装置,通过设置本体、遮挡板和引流板,减少蒸汽向上运动对安注水的夹带,可以防止安注水从冷管旁通,从而可以使安注水向下流入到压力容器的下降段环腔,从而对堆芯进行有效的保护。(The invention discloses a safety water injection protection device and a reactor with the same, and the safety water injection protection device comprises: the body is arranged on the outer side of the reactor hanging basket; the shielding plate is connected with the edge of the body and protrudes out of the body along a first direction; the drainage plate is connected with the lower edge of the body and extends obliquely to the first direction from top to bottom. According to the safety water injection protection device, the body, the shielding plate and the drainage plate are arranged, so that the entrainment of the upward movement of steam to the safety water is reduced, the safety water can be prevented from bypassing the cold pipe, and the safety water can flow downwards into the descending section annular cavity of the pressure vessel, so that the reactor core is effectively protected.)

1. A safety water injection protection device is characterized by comprising:

The body is arranged on the outer side of the reactor hanging basket;

The shielding plate is connected with the edge of the body and protrudes out of the body along a first direction;

The drainage plate is connected with the lower edge of the body and extends obliquely to the first direction from top to bottom.

2. the safety water injection protection device of claim 1, wherein the shielding plate is connected with the upper edge and the two side edges of the body.

3. the safety water injection protection device of claim 2, wherein the shielding plate comprises a first section, a second section and a connecting section, the first section and the second section are respectively connected with two side edges of the body, the connecting section is connected with the upper edge of the body, and the connecting section is connected between the upper end of the first section and the upper end of the second section.

4. The safety water injection protection device of claim 3, wherein the connecting section is an arc-shaped section which is open downwards.

5. The safety water injection protection device of claim 1, wherein a flow guide groove extending in an up-and-down direction is formed in one side of the body facing the first direction.

6. The safety water injection protection device of claim 2, wherein the diversion trench is provided in plurality, and the diversion trenches are spaced apart.

7. The safety watering protection device of claim 1, wherein the width of the drainage plate is no less than the width of the body.

8. A reactor, comprising:

A pressure vessel;

A reactor basket mounted to the pressure vessel;

a safety injection water injection pipeline which is communicated with the interior of the pressure container;

The safety water injection protection device of any one of claims 1 to 7, wherein the body is mounted on the reactor basket, and an outlet of the safety water injection pipeline is opposite to the body.

9. The reactor according to claim 8, wherein the outlet of the installation water injection line has a pipe diameter smaller than the width of the body.

Technical Field

The invention belongs to the technical field of nuclear reactor safety, and particularly relates to a safety water injection protection device and a reactor with the same.

Background

When a pressurized water reactor breaks, the emergency reactor core cooling system of the AP/CAP series reactor injects safety injection water into the descending section annular cavity through a direct safety injection (DVI) pipeline to realize reactor core cooling. At the moment, a large amount of steam generated by the reactor core flows out of the break through the descending section of the pressure vessel, the upward steam and the downward injection water form reverse flow in the descending section, gas-liquid reverse flow limitation (CCFL) can be generated, and the injection water is prevented from entering the reactor core. And the combined action of various effects can also cause the occurrence of an ECC Bypass, and the safety water injection can not flow through the reactor core. Because the safety injection pipeline is vertical to the pressure vessel, safety injection water enters the descending section annular cavity and then vertically impacts the outer side of the reactor core hanging basket, so that a large amount of safety injection water splashes upwards and laterally, and the safety injection water bypass phenomenon is easier to occur.

Disclosure of Invention

the present invention is directed to solving at least one of the problems of the prior art. Therefore, one object of the present invention is to provide a safety water injection protection device, which can control the flow direction of the safety water injection, reduce the safety water injection bypass, and reduce the entrainment of the steam at the safety water injection port to the safety water injection.

The safety water injection protection device according to the embodiment of the invention comprises: the body is arranged on the outer side of the reactor hanging basket; the shielding plate is connected with the edge of the body and protrudes out of the body along a first direction; the drainage plate is connected with the lower edge of the body and extends obliquely to the first direction from top to bottom.

According to the safety water injection protection device, the body, the shielding plate and the drainage plate are arranged, so that the entrainment of the upward movement of steam to the safety water is reduced, the safety water can be prevented from bypassing the cold pipe, and the safety water can flow downwards into the descending section annular cavity of the pressure vessel, so that the reactor core is effectively protected.

According to the safety water injection protection device provided by the embodiment of the invention, the shielding plates are connected with the upper edge and the two side edges of the body.

According to the safety water injection protection device provided by the embodiment of the invention, the shielding plate comprises a first section, a second section and a connecting section, wherein the first section and the second section are respectively connected with the two side edges of the body, the connecting section is connected with the upper edge of the body, and the connecting section is connected between the upper end of the first section and the upper end of the second section.

according to the safety water injection protection device provided by the embodiment of the invention, the connecting section is an arc-shaped section which is open downwards.

According to the safety water injection protection device provided by the embodiment of the invention, one side of the body facing to the first direction is provided with the diversion trench extending along the up-down direction.

According to the safety water injection protection device provided by the embodiment of the invention, the flow guide grooves are multiple, and the flow guide grooves are arranged at intervals.

According to the safety water injection protection device provided by the embodiment of the invention, the width of the drainage plate is not less than that of the body.

the invention also proposes a reactor comprising: a pressure vessel; a reactor basket mounted to the pressure vessel; a safety injection water injection pipeline which is communicated with the interior of the pressure container;

According to the safety water injection protection device provided by any embodiment of the invention, the body is arranged on the reactor hanging basket, and the outlet of the safety water injection pipeline is opposite to the body.

According to the reactor provided by the embodiment of the invention, the pipe diameter of the outlet of the safety water injection pipeline is smaller than the width of the body.

The advantages of the reactor and the safety water injection protection device are the same compared with the prior art, and are not described again.

additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of a reactor configuration according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a safety water injection protection device according to one embodiment of the invention.

Reference numerals:

A reactor 1000;

a safety water injection protection device 100; a reactor basket 200; a pressure vessel 300; installing a water injection line 400; a cold pipe 500;

a body 1; a diversion trench 11;

a shielding plate 2; a first section 21; a second section 22; a connecting section 23;

and a drainage plate 3.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A safety water injection protection device 100 according to an embodiment of the present invention is described below with reference to fig. 1 and 2.

Unless otherwise specified, the up-down direction in this application is the vertical direction, i.e., the Z direction, and the first direction is the direction of the safety water injection protection device 100 toward the safety water injection pipeline 400, i.e., the a direction in fig. 1 and 2.

The cradle 200 of the reactor 1000 is installed in the pressure vessel 300, and a safe water injection line 400(DVI line) is provided on the outer shell of the pressure vessel 300, when an accident occurs, the safety water injection pipeline 400 injects water into the descending ring cavity of the pressure vessel 300, the outlet of the safety water injection pipeline 400 in the pressure vessel 300 faces the reactor 1000 basket 200, the safety water injection protection device 100 is installed in the reactor 1000 basket 200 and is located at the outlet of the safety water injection pipeline 400, when the safety water injection line 400 is filled with water into the pressure vessel 300, water may flow out of the outlet of the safety water injection line 400 and be directed to the safety water injection protection device 100, because the cold pipe 500 is arranged on the pressure vessel 300 near the safety injection water injection pipeline 400, the safety injection water can easily flow out from the cold pipe 500 without better diversion after the safety injection water is injected, so that the purpose of cooling the reactor core can not be achieved.

Wherein, ann water injection protection device 100 includes body 1, shielding plate 2 and drainage plate 3, and shielding plate 2 links to each other with the border of body 1, and shielding plate 2 follows first direction A and goes out body 1, and drainage plate 3 links to each other and from the top down to first direction A extends to one side with the lower border of body 1, and wherein, first direction A is close to the direction of pressure vessel 300 casing.

From this, when the ann water injection from ann water injection pipeline 400 pour into pressure vessel 300 in, ann water injection can be shot to body 1, and shielding plate 2 is used for sheltering from ann water injection, makes ann water injection can not be to being equipped with shielding plate 2 direction splash, guarantees that ann water injection downwards flows into pressure vessel 300's descending segment ring chamber, reduces the ann water injection of going out from cold pipe 500 bypass.

In some examples, the upper edge and the both sides edge of body 1 all are equipped with shielding plate 2, therefore, the safety water injection can be through shielding plate 2's backstop after 1 is being directive to the body, the safety water injection can flow into the decline section of pressure vessel 300 downwards, drainage plate 3 can be with the drainage of safety water injection, make the safety water injection flow into the reactor core downwards, and drainage plate 3 can have the condensation to ascending steam, because drainage plate 3 from the top down to first direction A extends to one side, steam from the below of safety water injection protection device 100 contacts drainage plate 3 at the in-process of upward movement, can take place the condensation, can reduce the safety water injection and upwards smuggle by reactor core steam and smuggle to both sides with relative safety water injection protection device 100, thereby carry out effectual protection to the reactor core.

According to the safety water injection protection device 100, the body 1, the shielding plate 2 and the drainage plate 3 are arranged, so that entrainment of upward movement of steam to the safety water is reduced, the safety water can be prevented from bypassing the cold pipe 500, the safety water can flow downwards into the descending section annular cavity of the pressure vessel 300, and the reactor core is effectively protected.

Some embodiments of a safety watering protection device 100 according to the invention are described below with reference to fig. 1 and 2.

In some embodiments, the shielding plate 2 is connected to the upper edge and the two side edges of the body 1, so that when the safety injection water is injected to the body 1, the shielding plate 2 can prevent the safety injection water from splashing from the two sides or the upper end of the body 1, thereby guiding the safety injection water and ensuring that more safety injection water flows downwards into the annular cavity of the descending section of the pressure vessel 300.

in some embodiments, the shielding plate 2 includes a first section 21, a second section 22 and a connecting section 23, the first section 21 and the second section 22 are respectively connected to two side edges of the body 1, the connecting section 23 is connected to an upper edge of the body 1, and the connecting section 23 is connected between an upper end of the first section 21 and an upper end of the second section 22.

In some embodiments, the connecting section 23 is an arc section which is open downwards, the connecting position of the arc connecting section 23 and the first section 21 is in smooth transition, and the connecting position of the arc connecting section 23 and the second section 22 is in smooth transition, so that splashing of the safety injection water after contacting the shielding plate 2 can be prevented, and the connecting section 23 can play a good role in stopping the safety injection water.

In some embodiments, a guide groove 11 extending in the up-down direction is formed in one side of the body 1 facing the first direction a, the guide groove 11 can guide safety injection water, and when the safety injection water flows on the body 1, the guide groove 11 can guide the safety injection water, so that the safety injection water can flow in the extending direction of the guide groove 11, and the safety injection water is ensured to flow downwards to the reactor core. In some examples, the diversion trench 11 is multiple, the diversion trenches 11 are spaced apart, the diversion trenches 11 can distribute the flow of the installation water, and the vortex formed locally inside the diversion trench 11 facilitates the downward flow of the installation water.

in some embodiments, the width of the drainage plate 3 is not less than the width of the body 1, so that the drainage plate 3 can drain water flowing down from the body 1 well, and the condensation of steam by the drainage plate 3 with a large area is also good.

In some embodiments, the pipe diameter of the outlet of the safety water injection pipeline 400 is smaller than the width of the body 1, so that it can be ensured that a larger part of water flowing out of the safety water injection pipeline 400 can be emitted to the safety water injection protection device 100, and thus the safety water injection protection device 100 has higher reliability, and in some examples, the inner diameter of the arc-shaped section of the shielding plate 2 is larger than the pipe diameter of the outlet of the safety water injection pipeline 400.

The reactor 1000 according to the present invention has corresponding advantages by providing the safety device for water injection according to the present invention, and will not be described herein again.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.