CN209928990U

CN209928990U - Spent fuel storage pool

Info

Publication number: CN209928990U
Application number: CN201822189621.5U
Authority: CN
Inventors: 盛选禹; 孔文文; 成昱旻; 盛佳悦; 邵荣; 徐雅晨; 陈贺; 王岳巍; 陈敬旭
Original assignee: Tsinghua University; Tianjin Institute of Advanced Equipment of Tsinghua University
Current assignee: Tsinghua University; Tianjin Institute of Advanced Equipment of Tsinghua University
Priority date: 2018-12-25
Filing date: 2018-12-25
Publication date: 2020-01-10
Anticipated expiration: 2028-12-25

Abstract

The utility model provides a spent fuel storage pool, including a plurality of can with sea area intercommunication and can place spent fuel's pond structure. The pool structure comprises a cooling water-cooling pool which can be communicated with the sea area, a cooling water-heating pool which can be communicated with the sea area, and a pool which can store a plurality of spent fuels; the cooling water cooling pool is communicated with the water pool, the cooling water heating pool is communicated with the water pool, a control chamber is arranged inside the cooling water cooling pool, and the control chamber is communicated with the outside through an escape passage. The spent fuel storage pool of the utility model is designed to be built inside a nuclear power station, so the volume is very small and the pool is easy to saturate; the cooling system is complex and the cost is high; the security measures are difficult.

Description

Spent fuel storage pool

Technical Field

The utility model belongs to nuclear technology application especially relates to a spent fuel storage pool.

Background

When nuclear fuel is used in a reactor, the consumption of fissile nuclides and the generation of fission products and heavy nuclides cause the change of fuel reactivity, and finally the reactor can not maintain criticality any more, so that the nuclear fuel needs to be replaced to a certain extent. The fuel discharged after irradiation by the reactor is also called spent fuel or irradiated fuel. Spent fuel has a certain level of radioactivity and still generates waste heat, requiring additional care for its storage and disposal. Since water is a natural neutron blocker, and circulating water can also carry excess heat away. Therefore, it is a common method to store spent fuel in a pool. The existing spent fuel pool design is usually built in a nuclear power station, so that the volume is very small and the spent fuel pool is easy to saturate; the cooling system is complex and the cost is high; the security measures are difficult.

Disclosure of Invention

In view of the above, the present invention is directed to a spent fuel storage pool, a storage device in a spent fuel post-treatment facility, which is used for receiving spent fuel produced by a reactor and temporarily storing the spent fuel, waiting for entering subsequent treatment, and solving the problems that the existing spent fuel storage pool is usually built inside a nuclear power station, so that the spent fuel storage pool has a very small volume and is easily saturated; the cooling system is complex and the cost is high; the security measures are difficult.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a spent fuel storage pool comprises a plurality of pool structures which can be communicated with sea areas and can be used for placing spent fuel.

Further, the water pool structure comprises a cooling water cooling pool capable of being communicated with a sea area, a cooling water heating pool capable of being communicated with the sea area, and a water pool capable of storing a plurality of spent fuels;

the cooling water cooling pond with the pond intercommunication, the cooling water heating pond with the pond intercommunication, the inside control room that is equipped with of cooling water cooling pond, the control room passes through escape passage and outside intercommunication.

Furthermore, each pond structure top all is equipped with the storage frame.

Further, be equipped with the transfer crane that can transport the spent fuel on the storage frame, the transfer crane slides and sets up on the storage frame.

Further, store and put up inside being equipped with a plurality of storage spaces that can store the spentnuclear fuel, each storage space inside all be equipped with can with transfer crane complex crane track.

Furthermore, the cooling water-cooling pool is communicated with the sea area through a water inlet pipe.

Furthermore, the cooling water heating pool is communicated with the sea area through a water outlet pipe.

Furthermore, the inlet tube is communicated with the sea area through a water suction pump.

Furthermore, the water outlet pipe is communicated with the sea area through a water suction pump.

Compared with the prior art, a spent fuel storage pool have following advantage:

a spent fuel storage pool, can directly shift spent fuel to inside the pond by storing the frame through the transfer crane, store spent fuel through the pond, inlet tube and sea area intercommunication, inside cold water circulation to the pond in the sea area, and then can play the cooling effect to the inside spent fuel in pond, through cooling off the sea water after the hydrothermal pond will heaies up in the outlet pipe, get rid of to the sea area, to spent fuel operation in-process, if the accident of transfer crane to spent fuel breaks away from appears, operating personnel can flee through the passageway of fleing for one's life, holistic safety effect has further been strengthened, and then can realize one set of storage pool that can be applied to spent fuel temporary storage facility, can break away from the goods loading and unloading of nuclear power station independent completion spent fuel, remove, store. Has large volume (can contain more than 5000 tons), can independently receive the spent fuel generated by a plurality of nuclear power stations and temporarily store the spent fuel (more than 30 years). Has a complete and efficient cooling system and safety guarantee measures.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic view of an embodiment of a spent fuel storage pool according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a spent fuel storage pool according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a pool in a spent fuel storage pool according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a cooling water-cooling pool in a spent fuel storage pool according to an embodiment of the present invention.

Description of reference numerals:

1-aerial parts; 2-transport elevator; 3-transferring the crane; 4-a water pool; 5-cooling a water cooling tank; 6-water inlet pipe; 7-a water outlet pipe; 8-crane rail; 9-escape passage; 10-spent fuel pool cooling inlet; 11-spent fuel pool cooling outlet; 12-cooling the water heat pool.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

A spent fuel storage pool, as shown in figure 2, comprises a plurality of pool structures which can be communicated with sea areas and can be used for placing spent fuel.

The pool structure comprises a cooling water-cooling pool 5 which can be communicated with the sea area, a cooling water-heating pool 12 which can be communicated with the sea area, and a pool 4 which can store a plurality of spent fuels;

the cooling water cooling pool 5 is communicated with the water pool 4, the cooling water heating pool 12 is communicated with the water pool 4, a control room is arranged in the cooling water cooling pool 5 and is communicated with the outside through an escape passage 9, and the escape passage 9 is connected with an external transportation tunnel, namely an entrance of an above-ground facility, and is used for emergency. When the accident occurs, the personnel in the facility can evacuate the passageway to the ground.

A storage rack is arranged above each pool structure.

Be equipped with the transfer crane 3 that can transport the spent fuel on the storage frame, transfer crane 3 slides and sets up on storing the frame. The temporary spent fuel storage facility is independent of any nuclear power station, is an independent facility and is located on the coast. The overground part 1 comprises a loading and unloading area, a waiting area, a waste heat measurement area, a drying area, a transfer area, a personnel working area and the like, and spent fuel is mainly stored in an underground area. After the spent fuel is transported to the facility by the transport container, unloaded in the loading and unloading area and subjected to a series of treatments in the above ground area, the spent fuel rods enter the transport elevator 2 and are transported to the underground area. The spent fuel is lifted to the upper part of the pool 4 by the transfer crane 3, the transfer crane 3 is remotely controlled by ground personnel, and the spent fuel is gradually lowered onto the corresponding storage rack along the crane track 8.

The inside storage space that is equipped with a plurality of spent fuel that can store of storage frame, each storage space inside all be equipped with can with transfer crane 3 complex crane rail 8.

The length of the cave in which the pools 4 are located can exceed 120 meters, and each pool is 15 meters long and wide and 20 meters deep. Each pool 4 can arrange 15X15 storage racks, each storage rack is square in section, and the inner space can store 8-12 spent fuel rods. 5-7 pools can be arranged in the whole cave.

The seawater cooling circulation enters a cooling water cooling pool 5 from a water inlet 6 and enters a storage area of a pool 4 through a spent fuel pool cooling inlet 10, and the heated cooling water enters a cooling water heating pool 12 from a spent fuel pool cooling outlet 11 and returns through a water outlet pipe 7.

In the implementation process, the cooling water cooling tank 5 is communicated with the sea area through the water inlet pipe 6, and can be communicated with the sea area through the water suction pump through the water inlet pipe 6 to complete the circulation of water in the water tank 4. The cooling water heating pool 12 is communicated with the sea area through the water outlet pipe 7, or is communicated with the sea area through the water outlet pipe 7 through a water suction pump, and the circulation of water in the water pool 4 is completed.

Working mode of the example

The utility model discloses can be applied to the spent fuel temporary storage facility, the storage region is wholly established below sea level for the overground part 1 through transporting elevator 2 and transporting spent fuel to the underground, transfer crane 3 transports spent fuel to the corresponding position in pond 4 along track 8, can directly transfer spent fuel from the storage rack to the inside of pond 4 through transfer crane 3, store spent fuel through pond 4, inlet tube 6 is communicated with sea area, make the inside of pond 4 with the cold water circulation in the sea area, and then can play the cooling effect to the spent fuel in pond 4, through cooling water hot pond 12 with the sea water after the heating up in outlet pipe 7, get rid of to the sea area, in the operation process to spent fuel, if the accident of transfer crane 3 to spent fuel breaks away from, the operating personnel can flee through escape passage 9, further strengthened holistic safety effect, the utility model discloses can be applied to the spent fuel temporary storage facility, the scale can be enlarged to more than 5 pools, the seawater is directly utilized for cooling circulation, and the seawater can be directly utilized for sealing when leakage accidents occur.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A spent fuel storage pool is characterized in that: the device comprises a plurality of pool structures which can be communicated with sea areas and can be used for placing spent fuel;

the water pool structure comprises a cooling water cooling pool (5) capable of being communicated with a sea area, a cooling water heating pool (12) capable of being communicated with the sea area, and a water pool (4) capable of storing a plurality of spent fuels;

the cooling water cooling pool (5) is communicated with the pool (4), the cooling water heating pool (12) is communicated with the pool (4), a control chamber is arranged inside the cooling water cooling pool (5), and the control chamber is communicated with the outside through an escape passage (9).

2. The spent fuel storage pool of claim 1, wherein: each pool structure top all is equipped with stores the frame.

3. The spent fuel storage pool of claim 2, wherein: the storage rack is provided with a transfer crane (3) capable of transferring spent fuel, and the transfer crane (3) is arranged on the storage rack in a sliding mode.

4. The spent fuel storage pool of claim 3, wherein: store and put up inside being equipped with a plurality of storage spaces that can store the spentnuclear fuel, each storage space inside all be equipped with can with transfer crane (3) complex crane track (8).

5. The spent fuel storage pool according to any one of claims 1 to 4, wherein: and the cooling water-cooling pool (5) is communicated with the sea area through a water inlet pipe (6).

6. The spent fuel storage pool according to any one of claims 1 to 4, wherein: the cooling water heating pool (12) is communicated with the sea area through a water outlet pipe (7).

7. The spent fuel storage pool of claim 5, wherein: the water inlet pipe (6) is communicated with the sea area through a water suction pump.

8. The spent fuel storage pool of claim 6, wherein: and the water outlet pipe (7) is communicated with the sea area through a water suction pump.