Pool for passive emergency cooling of reactor

Abstract

The utility model provides a passive emergency cooling pool for a reactor, and aims to solve the technical problem of poor stability of a reactor cooling system. The pool for emergency cooling comprises an emergency pool which is supplied with water through a first pipeline, and the first pipeline is provided with a first water pump; the water tower is communicated with the emergency water pool through a second pipeline, a second water pump is arranged on the second pipeline, and the volume of the water tower is smaller than that of the emergency water pool; the water inlet end of the emergency cooling loop is communicated with the bottom of the water tower through a water supply pipe, and the water return end is connected to the top of the water tower through a return pipe; wherein the reactor is arranged on the emergency cooling loop, the reactor comprises a containment outer roof truss, and the altitude of the water tower is higher than the altitude of the emergency pool and the altitude of the containment outer roof truss. When an external power source disappears due to natural disasters, emergency cooling can be continuously carried out on the reactor, so that sufficient time is provided for first-aid repair.

Description

Technical Field

[0001] The utility model relates to a nuclear energy safety system, in particular to a reactor passive emergency cooling water pool. Background Art

[0002] The current reactor uses external kinetic water as cooling water. The existing cooling system has the disadvantage of poor stability. In the case of natural disasters, the power system is easily destroyed, causing the cooling system to stop working. Utility Model Content

[0003] In view of the technical problem of poor stability of reactor cooling systems in the prior art, the utility model provides a reactor passive emergency cooling water pool, which has the advantage of improving the stability of the cooling system.

[0004] The technical solution of the utility model is:

[0005] Reactor passive emergency cooling pool, including:

[0006] an emergency water tank, which is supplied with water through a first pipeline, wherein the first pipeline is provided with a first water pump;

[0007] A water tower, connected to the emergency water pool through a second pipe, and a second water pump is provided on the second pipe, and the volume of the water tower is smaller than that of the emergency water pool;

[0008] An emergency cooling circuit, whose water inlet end is connected to the bottom of the water tower through a water supply pipe, and whose water return end is connected to the top of the water tower through a return pipe;

[0009] Wherein, the reactor is arranged on the emergency cooling loop, the reactor includes a containment outer roof frame, and the altitude of the water tower is higher than the altitude of the emergency water pool and the altitude of the containment outer roof frame.

[0010] Optionally, a control valve and a mobile pump interface are provided on both the first pipeline and the second pipeline.

[0011] Optionally, a contaminated water pool and a contamination treatment device are provided between the reactor and the return pipe.

[0012] Optionally, a first valve is provided between the water supply pipe and the reactor;

[0013] A second valve is provided between the reactor and the contaminated water pool;

[0014] A water absorber is provided in the polluted water pool;

[0015] A third pump and a third valve are provided between the water absorber and the pollution treatment device.

[0016] Optionally, the containment shell is installed on the outer layer of the reactor, and the reactor further comprises a steel containment shell pressure vessel installed on the middle layer and a core pressure vessel installed on the inner layer;

[0017] The emergency cooling circuit includes a first cooling branch, a second cooling branch and a third cooling branch connected in parallel between the water supply pipe and the return pipe;

[0018] The core pressure vessel is arranged on the first cooling branch, the steel containment pressure vessel is arranged on the second cooling branch, and the containment outer roof is arranged on the third cooling branch.

[0019] Optionally, the polluted water pool includes a heavily polluted water pool, a moderately polluted water pool and a lightly polluted water pool;

[0020] The pollution treatment device includes a heavy pollution treatment device, a medium pollution treatment device and a light pollution treatment device;

[0021] The heavily polluted water pool and the heavily polluted treatment device are connected in series to the first cooling branch;

[0022] The moderately polluted water pool and the moderately polluted treatment device are connected in series to the second cooling branch;

[0023] The lightly polluted water pool and the lightly polluted treatment device are connected in series to the third cooling branch.

[0024] Optionally, a sprinkler is provided on the top of the containment outer roof truss.

[0025] Optionally, a booster is provided on the water supply pipe.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] First, an emergency water pool is set up to store a large amount of emergency cooling water. Then, a first water pump arranged on the first pipeline supplies water to the emergency water pool from water sources such as oceans, rivers, and lakes near the reactor construction site, thereby solving the problem of high regional requirements for reactor construction.

[0028] In addition, a water tower is installed between the emergency water pool and the reactor, and the emergency cooling water in the emergency water pool is pumped into the water tower through a second water pump. By raising the altitude of the water tower, the emergency cooling water can circulate in the emergency cooling circuit under the action of gravitational potential energy, so that when a natural disaster causes the external power source to disappear, the reactor can continue to be cooled in an emergency, thus providing sufficient time for emergency repairs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0031] Figure 2 for Figure 1 The enlarged schematic diagram of the middle A part;

[0032] Figure 3 for Figure 1 Enlarged schematic diagram of part B in the middle. DETAILED DESCRIPTION

[0033] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0037] Example:

[0038] See also Figure 1-Figure 3The reactor passive emergency cooling water pool includes an emergency water pool 1, a first pipeline 2, a first water pump 3, a water tower 4, a second pipeline 5, a second water pump 6, and an emergency cooling circuit. The emergency water pool 1 is built in an area with abundant water resources, the first pipeline 2 is arranged on the emergency water pool 1, and the first water pump 3 is arranged on the first pipeline 2, and the emergency cooling water can be continuously added to the emergency water pool 1 through the first water pump 3.

[0039] The water tower 4 is built near the reactor 7, and a building for raising the height of the water tower 4 is built at the bottom of the water tower 4, or the water tower 4 is built against a mountain, so that the altitude of the water tower 4 is higher than the altitude of the emergency water pool 1 and the altitude of the reactor 7. A second pipeline 5 is arranged between the water tower 4 and the emergency water pool 1, and a second water pump 6 is arranged on the second pipeline 5, and the emergency cooling water in the emergency water pool 1 can be pumped into the water tower 4 through the second water pump 6.

[0040] Since the emergency water pool 1 is used to store emergency cooling water required by the reactor, the overall volume of the emergency water pool 1 is several times or even dozens of times the volume of the water tower 4 .

[0041] The emergency cooling loop is installed between the water tower 4 and the reactor 7. The water inlet end of the emergency cooling loop is connected to the bottom of the water tower 4 through the water supply pipe 8, and then the water return end of the emergency cooling loop is connected to the top of the water tower 4 through the return pipe 9. The reactor 7 is arranged between the water supply pipe 8 and the return pipe 9 of the emergency cooling loop.

[0042] The working principle of this embodiment is to first set up an emergency water pool 1 for storing a large amount of emergency cooling water, and then supply water to the emergency water pool 1 through a first water pump 3 set on a first pipeline 2. The first pipeline 2 and the first water pump 3 store water in the emergency water pool 1 through a water source such as an ocean, a river or a lake where the reactor 7 is built, for use in emergency cooling of the reactor, thereby solving the problem of high regional requirements for the construction of the reactor 7.

[0043] In addition, a water tower 4 is installed between the emergency water pool 1 and the reactor 7, and the emergency cooling water in the emergency water pool 1 is sent to the water tower 4 through the second water pump 6. By raising the altitude of the water tower 4, the emergency cooling water can circulate in the emergency cooling circuit under the action of gravitational potential energy, so that when a natural disaster causes the external power source to disappear, the reactor 7 can continue to be cooled in an emergency, thereby providing sufficient time for emergency repairs.

[0044] Preferably, the first pipeline 2 and the second pipeline 5 are both provided with a control valve and a mobile pump interface, and by providing the control valve and the mobile pump interface, the first pipeline 2 and the second pipeline 5 have the function of connecting to other water sources. At the same time, a booster is provided on the water supply pipe 8.

[0045] In addition, in this embodiment, the water tower 4 has the same earthquake resistance, wind resistance, tsunami resistance, corrosion resistance, and natural disaster resistance as the adjacent reactor building, and complies with the relevant standards and specifications for nuclear power plant construction.

[0046] In one specific embodiment:

[0047] A contaminated water pool and a pollution treatment device are provided between the reactor 7 and the return pipe 9. By setting up a non-contaminated water pool, the emergency cooling water contaminated by the reactor 7 is temporarily stored. Then, the sewage is purified by the sewage treatment device and then returned to the water tower 4 through the return pipe 9 to realize the cooling cycle.

[0048] In another specific embodiment:

[0049] A first valve 10 is provided between the water supply pipe 8 and the reactor 7, a second valve 11 is provided between the reactor 7 and the contaminated water pool, a water absorber 12 is provided in the contaminated water pool, and a third pump 13 and a third valve are provided between the water absorber 12 and the pollution treatment device.

[0050] Valves and pumps are provided on the connecting pipes between the water supply pipe 8, the reactor 7, the contaminated water pool, the water absorber 12 and the contamination treatment device to control the flow path and flow rate of the emergency cooling water.

[0051] In another specific embodiment:

[0052] The reactor 7 includes a core pressure vessel 7-1 arranged in the inner layer, a steel containment pressure vessel 7-2 arranged in the middle layer, and a containment outer roof frame 7-3 arranged in the outer layer. The contaminated water pool includes a heavily contaminated water pool 14, a moderately contaminated water pool 15, and a lightly contaminated water pool 16, and the pollution treatment device includes a heavily contaminated treatment device 17, a moderately contaminated treatment device 18, and a lightly contaminated treatment device 19.

[0053] The emergency cooling circuit comprises a first cooling branch 20 , a second cooling branch 21 and a third cooling branch 22 connected in parallel between the water supply pipe 8 and the return pipe 9 .

[0054] The emergency cooling water in the first cooling branch 20 flows sequentially through the first branch pipe 20-1, the core pressure vessel 7-1, the first drain pipe 20-2, the heavily polluted water pool 14, the first water intake pipe 20-3, and the heavily polluted treatment device 17. The first branch pipe 20-1 is connected to the water supply pipe 8, and the output end of the heavily polluted treatment device 17 is connected to the return pipe 9.

[0055] The emergency cooling water in the second cooling branch 21 flows sequentially through the second branch pipe 21-1, the steel containment pressure vessel 7-2, the second drain pipe 21-2, the moderately polluted water pool 15, the second water intake pipe 21-3, and the moderately polluted treatment device 18. The second branch pipe 21-1 is connected to the water supply pipe 8, and the output end of the moderately polluted treatment device 18 is connected to the return pipe 9.

[0056] The emergency cooling water in the third cooling branch 22 flows through the third branch pipe 22-1, the sprinkler 22-2, the containment outer roof truss 7-3, the third drain pipe 22-3, the lightly polluted water pool 16, the third water suction pipe 22-4, and the lightly polluted treatment device 19. The third branch pipe 22-1 is connected to the water supply pipe 8, and the output end of the lightly polluted treatment device 19 is connected to the return pipe 9. The sprinkler 22-2 is located above the containment outer roof truss 7-3.

[0057] The first branch pipe 20-1, the second branch pipe 21-1 and the third branch pipe 22-1 are respectively provided with a first valve 10. The first valve 10 provided on the first branch pipe 20-1 is a high-temperature and high-pressure shuttle welding check valve, and the structure of the high-temperature and high-pressure shuttle welding check valve can refer to Chinese Patent No.: CN201010123357.0. The first valves 10 provided on the second branch pipe 21-1 and the third branch pipe 22-1 are both shuttle micro-stop check valves, and the structure of the shuttle micro-stop check valve can refer to Chinese Patent No.: CN200710050795.7.

[0058] A water absorber 12 is respectively provided at the end of the first water suction pipe 20-3, the second water suction pipe 21-3 and the third water suction pipe 22-4, and the three water absorbers 12 are respectively submerged in the heavily polluted water pool 14, the moderately polluted water pool 15 and the lightly polluted water pool 16. A third pump 13 is respectively provided on the first water suction pipe 20-3, the second water suction pipe 21-3 and the third water suction pipe 22-4, and the third pump 13 is a booster pump, and sewage is supplied to the heavily polluted treatment device 17, the moderately polluted treatment device 18 and the lightly polluted treatment device 19 through the three third pumps 13.

[0059] In this embodiment, the following three working states can be realized simultaneously or independently according to the state of the natural disaster accident: 1. Submerged through-flow external circulation of the core pressure vessel 7-1; 2. Submerged through-flow external circulation of a certain capacity in the containment outer roof truss 7-3; 3. Through-flow spraying on the top of the containment outer roof truss 7-3.

[0060] The components of the entire system are capable of adapting to multiple operating modes such as passive, manual, robotic, pneumatic, and power source drive to accommodate emergency cooling treatments in different states.

[0061] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. Reactor passive emergency cooling water pool, characterized in that: include: an emergency water tank, which is supplied with water through a first pipeline, wherein the first pipeline is provided with a first water pump; A water tower, connected to the emergency water pool through a second pipe, and a second water pump is provided on the second pipe, and the volume of the water tower is smaller than that of the emergency water pool; An emergency cooling circuit, whose water inlet end is connected to the bottom of the water tower through a water supply pipe, and whose water return end is connected to the top of the water tower through a return pipe; Wherein, the reactor is arranged on the emergency cooling loop, the reactor includes a containment outer roof frame, and the altitude of the water tower is higher than the altitude of the emergency water pool and the altitude of the containment outer roof frame.

2. The reactor passive emergency cooling water pool according to claim 1, characterized in that: The first pipeline and the second pipeline are both provided with a control valve and a mobile pump interface.

3. The reactor passive emergency cooling water pool according to claim 1, characterized in that: A contaminated water pool and a contamination treatment device are provided between the reactor and the return pipe.

4. The reactor passive emergency cooling water pool according to claim 3, characterized in that: A first valve is provided between the water supply pipe and the reactor; A second valve is provided between the reactor and the contaminated water pool; A water absorber is provided in the polluted water pool; A third pump and a third valve are provided between the water absorber and the pollution treatment device.

5. The reactor passive emergency cooling water pool according to claim 4, characterized in that: The containment shell is installed on the outer layer of the reactor, and the reactor also includes a steel containment shell pressure vessel installed on the middle layer and a core pressure vessel installed on the inner layer; The emergency cooling circuit includes a first cooling branch, a second cooling branch and a third cooling branch connected in parallel between the water supply pipe and the return pipe; The core pressure vessel is arranged on the first cooling branch, the steel containment pressure vessel is arranged on the second cooling branch, and the containment outer roof is arranged on the third cooling branch.

6. The reactor passive emergency cooling water pool according to claim 5, characterized in that: The polluted water pools include heavily polluted water pools, moderately polluted water pools and lightly polluted water pools; The pollution treatment device includes a heavy pollution treatment device, a medium pollution treatment device and a light pollution treatment device; The heavily polluted water pool and the heavily polluted treatment device are connected in series to the first cooling branch; The moderately polluted water pool and the moderately polluted treatment device are connected in series to the second cooling branch; The lightly polluted water pool and the lightly polluted treatment device are connected in series to the third cooling branch.

7. The reactor passive emergency cooling water pool according to claim 6, characterized in that: A sprinkler is provided on the top of the containment outer roof frame.

8. The reactor passive emergency cooling water pool according to claim 4, characterized in that: A pressure booster is provided on the water supply pipe.

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