CN219202779U

CN219202779U - Spent fuel storage and transportation pretreatment equipment

Info

Publication number: CN219202779U
Application number: CN202223174932.7U
Authority: CN
Inventors: 李仕元; 王晨; 赵京昌; 龚卫民; 景顺平; 王莉君; 李传生; 宫逸飞
Original assignee: Cgnpc Uranium Resources Co ltd; China Nuclear Power Operation Technology Corp Ltd
Current assignee: Cgnpc Uranium Resources Co ltd; China Nuclear Power Operation Technology Corp Ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-06-16
Anticipated expiration: 2032-11-29

Abstract

The utility model discloses a spent fuel storage and transportation pretreatment device, which comprises a main body; the main body comprises an inflation module, a gas-water separation module and a first switch valve; the main body is also provided with a first container interface and a second container interface, the first container interface can be connected with a gas port of the spent fuel storage and transportation container, and the second container interface can be connected with a liquid port of the spent fuel storage and transportation container; the gas outlet of the inflation module is communicated with the first container interface, the second container interface is communicated with the first interface of the first switch valve, and the second interface of the first switch valve is communicated with the inlet of the gas-water separation module; when the pressure in the spent fuel storage and transportation container is larger than or equal to a preset pressure value, the first switch valve is opened, and when the pressure in the spent fuel storage and transportation container is smaller than the preset pressure value, the first switch valve is closed. According to the utility model, the gas is filled into the spent fuel storage and transportation container, so that the liquid is quickly pressed into the gas-water separation module to carry out gas-water separation, the drying efficiency is improved, and the spent fuel loading time is shortened.

Description

Spent fuel storage and transportation pretreatment equipment

Technical Field

The utility model relates to the technical field of nuclear engineering, in particular to spent fuel storage and transportation pretreatment equipment.

Background

During the in-service operation of the pressurized water reactor nuclear power plant, the spent fuel assemblies discharged from the reactor are temporarily stored in a spent fuel pool of a fuel plant, and with the increase of the service life of domestic units, the spent fuel assemblies discharged from the nuclear power plant are increasingly increased, and the spent fuel assemblies are required to be discharged from the spent fuel pool and loaded to a special spent fuel storage container for off-stack storage or transportation to a post-treatment plant for treatment. The existing pressurized water reactor spent fuel assembly storage and transportation containers in China at present mainly comprise three types of container containers, namely an NAC-STC transport container, an ENUN 24P type transport container and a NUHOMS 32PTH1 type dry storage system.

In the process of loading and unloading the spent fuel assembly from the spent fuel storage and transportation container, related process operations such as drying and the like are required to be carried out on the spent fuel storage and transportation container. With the increase of service life of domestic nuclear power plant units, more and more nuclear power units face the problem of full capacity of a spent fuel pool, the transportation demand of a spent fuel assembly increases rapidly year by year, and the transportation demand of a high-fuel assembly is provided from 2018, so that the transportation safety of the high-fuel assembly is ensured, the security report of a spent fuel transportation container prescribes that the whole spent fuel loading time should not exceed 72 hours, and great challenges are provided for the whole spent fuel loading and transportation work.

Therefore, how to reduce the spent fuel loading time is a technical problem to be solved by the skilled person.

Disclosure of Invention

Accordingly, the present utility model is directed to a spent fuel pre-treatment device for storing and transporting, which aims to reduce the spent fuel loading time.

In order to achieve the above object, the present utility model provides the following solutions:

a spent fuel pre-storage and transportation treatment device, comprising a main body;

the main body comprises an inflation module, a gas-water separation module and a first switch valve;

the main body is also provided with a first container interface and a second container interface, the first container interface can be connected with a gas port of a spent fuel storage and transportation container, and the second container interface can be connected with a liquid port of the spent fuel storage and transportation container;

the gas outlet of the gas charging module is communicated with the first container interface, the second container interface is communicated with the first interface of the first switch valve, the second interface of the first switch valve is communicated with the inlet of the gas-water separation module, the gas outlet of the gas-water separation module is communicated with the gas discharging system, and the liquid outlet of the gas-water separation module is communicated with the liquid collecting device;

The first switch valve is opened when the pressure in the spent fuel storage and transportation container is greater than or equal to a preset pressure value, and is closed when the pressure in the spent fuel storage and transportation container is less than the preset pressure value.

In a specific embodiment, the inflation module includes a gas source interface, a gas filter, a first pressure transmitter, and a second on-off valve,

the air source interface is used for being communicated with an air source, the inlet of the air filter is communicated with the air source interface, the outlet of the air filter is communicated with the inlet of the first pressure transmitter, the outlet of the first pressure changer is communicated with the first interface of the second switch valve, and the second interface of the second switch valve is the air outlet of the inflation module;

and/or

The gas-water separation module comprises a gas-water separator, a third switch valve, a fourth switch valve and a water outlet joint,

the inlet of the gas-water separator is the inlet of the gas-water separation module, the gas outlet of the gas-water separator is communicated with the first interface of the third switch valve, the second interface of the third switch valve is the gas outlet of the gas-water separation module,

The liquid outlet of the gas-water separator is communicated with the first connector of the fourth switch valve, the second connector of the fourth switch valve is communicated with the water outlet connector, and the water outlet connector is the liquid outlet of the gas-water separation module.

In another specific embodiment, the body further comprises a water filling module, a first switching structure, and a second switching structure;

the outlet of the water filling module is communicated with the first interface of the first switching structure, the second interface of the first switching structure is communicated with the second interface of the first switching valve, and the third interface of the first switching structure is communicated with the inlet of the gas-water separation module;

the first interface of the second switching structure is communicated with the first container interface, the second interface of the second switching structure is communicated with the inlet of the gas-water separation module, and the third interface of the second switching structure is communicated with the outlet of the inflation module;

the first switching structure can be switched to the second interface of the first switching structure to be communicated with the first interface or the third interface, and the second switching structure can be switched to the first interface of the second switching structure to be communicated with the second interface or the third interface;

When the spent fuel storage and transportation container is required to be inflated and drained, the first container interface is communicated with a gas port of the spent fuel storage and transportation container, the second container interface is communicated with a liquid port of the spent fuel storage and transportation container, the first switching structure is switched to the second interface of the first switching structure to be communicated with the third interface, the second switching structure is switched to the first interface of the second switching structure to be communicated with the third interface, and the inflation module starts to inflate and drain the spent fuel storage and transportation container;

the aeration purging of the spent fuel storage and transportation container comprises continuous purging and pressure holding purging;

when the spent fuel storage and transportation container is subjected to pressure-holding purging, a first container interface is communicated with a gas port of the spent fuel storage and transportation container, a second container interface is communicated with a liquid port of the spent fuel storage and transportation container, the first switch valve is closed, the first switch structure is switched to the second interface of the first switch structure to be communicated with a third interface, the first interface of the second switch structure is switched to be communicated with the third interface, the inflation module is started to inflate gas with preset pressure into the spent fuel storage and transportation container, the first switch valve is opened, and the gas with pressure extrudes water vapor in the spent fuel storage and transportation container to the gas-water separation module;

When the spent fuel storage and transportation container is continuously purged, the first container interface is communicated with a gas port of the spent fuel storage and transportation container, the second container interface is communicated with a liquid port of the spent fuel storage and transportation container, the first switch valve is opened, the first switch structure is switched to the second interface of the first switch structure to be communicated with the third interface, the second switch structure is switched to the first interface of the second switch structure to be communicated with the third interface, the inflation module is started to inflate the spent fuel storage and transportation container, and the moisture in the spent fuel storage and transportation container is extruded to the gas-water separation module;

when auxiliary drainage is needed for the spent fuel storage and transportation container, the first container interface is communicated with the gas port of the spent fuel storage and transportation container, the liquid port of the spent fuel storage and transportation container is communicated with the drainage pump, the second switching structure is switched to the first interface of the second switching structure to be communicated with the third interface, and the inflation module is started to inflate the spent fuel storage and transportation container for auxiliary drainage;

when the spent fuel storage and transportation container is required to be filled with water and exhausted, the first container interface is communicated with a gas port of the spent fuel storage and transportation container, the second container interface is communicated with a liquid port of the spent fuel storage and transportation container, the first switch valve is opened, the first switch structure is switched to be communicated with the first interface and the second interface of the first switch structure, the second switch structure is switched to be communicated with the first interface and the second interface of the second switch structure, and the water filling module starts to fill water and exhaust into the spent fuel storage and transportation container;

When the temporary pressure relief of the spent fuel storage and transportation container is needed, the first container interface is communicated with the gas port of the spent fuel storage and transportation container, the gas outlet of the gas-water separation module is communicated with the gas discharge system, the first switch valve is closed, and the second switch structure is switched to the first interface and the second interface of the second switch structure to be communicated for pressure relief.

In another specific embodiment, the body further comprises a safety heat exchange module, a third switching structure, and a fourth switching structure;

the first interface of the third switching structure is communicated with the first interface of the second switching structure, the second interface of the third switching structure is communicated with the first container interface, the third interface of the third switching structure is communicated with the first gas interface of the safety heat exchange module, and the second gas interface of the safety heat exchange module is communicated with the first container interface;

the first interface of the fourth switching structure is communicated with the second interface of the first switching valve, the second interface of the fourth switching structure is communicated with the second interface of the first switching structure, the third interface of the fourth switching structure is communicated with the first liquid interface of the safety heat exchange module, and the second liquid interface of the safety heat exchange module is communicated with the second interface of the first switching valve;

The first interface of the third switching structure can be switched to be communicated with the second interface or the third interface, and the fourth switching structure can be switched to be communicated with the second interface of the fourth switching structure and be communicated with the first interface or the third interface;

when the spent fuel storage and transportation container needs to be cooled, the first switch valve is opened, the first switch structure is switched to be communicated with the first interface and the second interface of the first switch structure, the second switch structure can be switched to be communicated with the first interface and the second interface of the second switch structure, the third switch structure can be switched to be communicated with the first interface and the third interface of the third switch structure, the fourth switch structure can be switched to be communicated with the second interface and the third interface of the fourth switch structure, and the water filling module is started to fill water into the spent fuel storage and transportation container;

when the spent fuel pre-storage and transportation treatment equipment needs to be cleaned, the first container interface is communicated with the second container interface, the first switching structure is switched to the first interface and the second interface of the first switching structure, the second switching structure can be switched to the first interface and the second interface of the second switching structure, the first switching valve is opened, the third switching structure can be switched to the first interface and the third interface of the third switching structure, the fourth switching structure can be switched to the second interface and the third interface of the fourth switching structure, the water filling module is started to fill water into the spent fuel pre-storage and transportation treatment equipment and is discharged through the gas-water separation module, and cleaning is completed.

In another specific embodiment, the water filling module comprises a water source interface, a water return interface, a bypass flow regulating valve and a flow regulating valve,

the water source interface and the backwater interface are respectively used for being communicated with a water source,

the inlet of the flow regulating valve and the inlet of the bypass flow regulating valve are respectively communicated with the water source interface, the outlet of the bypass flow regulating valve is communicated with the backwater interface, and the outlet of the flow regulating valve is the outlet of the water filling module;

and/or

The safety heat exchange module is a plate heat exchanger.

In another specific embodiment, the body further comprises a vacuum drying module;

the main body is also provided with a third container interface and a fourth container interface, the third container interface can be connected with a gas port of the spent fuel storage and transportation container, and the fourth container interface can be connected with a liquid port of the spent fuel storage and transportation container;

the first interface of the vacuum drying module is communicated with the third container interface and the fourth container interface respectively, and the second interface of the vacuum drying module is used for communicating with a gas discharge system;

when the spent fuel storage and transportation container is required to be dried in vacuum, the third container interface is communicated with a gas port of the spent fuel storage and transportation container, the fourth container interface is communicated with a liquid port of the spent fuel storage and transportation container, the second interface of the vacuum drying module is communicated with the gas discharge system, and the vacuum drying module is started to perform vacuum drying on the spent fuel storage and transportation container.

In another specific embodiment, the body further comprises a fifth switch valve;

the first interface of the fifth switch valve is communicated with the inflation module, and the second interface of the fifth switch valve is respectively communicated with the first interface of the vacuum drying module, the third container interface and the fourth container interface;

when the spent fuel storage and transportation container is required to be filled with gas, the third container interface is communicated with a gas port of the spent fuel storage and transportation container, the fourth container interface is communicated with a liquid port of the spent fuel storage and transportation container, the fifth switch valve is opened, and the inflation module is used for filling the spent fuel storage and transportation container with gas through the third container interface and the fourth container interface;

when the spent fuel storage and transportation container is required to be subjected to leakage detection, the third container interface is communicated with a gas port of the spent fuel storage and transportation container, the fourth container interface is communicated with a liquid port of the spent fuel storage and transportation container, and after filling a preset amount of gas into the spent fuel storage and transportation container, the fifth switching valve is closed for pressure maintaining test;

or alternatively

When the spent fuel storage and transportation container is required to be subjected to leakage detection, the third container interface is communicated with a gas port of the spent fuel storage and transportation container, the fourth container interface is communicated with a liquid port of the spent fuel storage and transportation container, the fifth switch valve is closed, the vacuum drying module is started to vacuumize the spent fuel storage and transportation container to a preset vacuum degree, and the connection between the vacuum drying module and the spent fuel storage and transportation container is disconnected to perform a pressure maintaining test.

In another specific embodiment, the vacuum drying module comprises a vacuum pump, a second pressure transmitter, a dust removal filter, an oil filtration filter, a sixth on-off valve, and a seventh on-off valve;

the first interface of the sixth switch valve is the first interface of the vacuum drying module, the second interface of the sixth switch valve is communicated with the inlet of the dust removal filter, the outlet of the dust removal filter is communicated with the inlet of the vacuum pump, the outlet of the vacuum pump is communicated with the inlet of the oil filter, the gas outlet of the oil filter is communicated with the first interface of the seventh switch valve, and the second interface of the seventh switch valve is the second interface of the vacuum drying module.

In another specific embodiment, the body further comprises an exhaust emission module;

the inlet of the exhaust gas emission module and the second interface of the vacuum drying module are respectively communicated with the gas outlet of the gas-water separation module, and the outlet of the exhaust gas emission module is used for being communicated with a gas emission system of the nuclear power station.

In another specific embodiment, the exhaust emission module comprises an exhaust filter, an exhaust regulator valve, a gas sampling interface, and a gas sampling return interface;

The first interface of the exhaust gas regulating valve is an inlet of the exhaust gas emission module, the second interface of the exhaust gas regulating valve is communicated with an inlet of the exhaust gas filter, and an outlet of the exhaust gas filter is used for discharging the filtered gas;

the gas sampling interface is communicated with a first interface of the waste gas regulating valve through an eighth switching valve, and the gas sampling reflux interface is communicated with a second interface of the waste gas regulating valve through a ninth switching valve;

when the spent fuel storage and transportation container is in a continuous purging state, gas sampling is carried out, at the moment, a first sampling interface of a sampling and analyzing device is communicated with the gas sampling interface, the first container interface is communicated with a gas port of the spent fuel storage and transportation container, a second container interface is communicated with a liquid port of the spent fuel storage and transportation container, a second sampling interface of the sampling and analyzing device is communicated with the gas sampling backflow interface, an eighth switching valve and a ninth switching valve are opened, and the inflation module works.

In another specific embodiment, the spent fuel storage and pre-treatment equipment further comprises an electronic control system, a water drawing module and a switching assembly;

The electric control system is in signal connection with each electric device on the main body;

the water drawing module is used for supplying liquid to the main body;

the adapter assembly is mounted on each interface of the main body for connecting to the spent fuel storage and transportation container.

The various embodiments according to the utility model may be combined as desired and the resulting embodiments after such combination are also within the scope of the utility model and are part of specific embodiments of the utility model.

According to the spent fuel storage and transportation pretreatment equipment provided by the utility model, gas is input into the spent fuel storage and transportation container, so that the pressure in the spent fuel storage and transportation container is increased, residual liquid in the spent fuel storage and transportation container is extruded into the gas-water separation module under the action of the gas pressure, after gas-liquid separation, the gas is discharged into the waste gas discharge module through the gas outlet of the gas-water separation module, and the liquid is discharged into the liquid collecting device through the liquid outlet in the gas-water separation module until the liquid outlet in the gas-water separation module is no longer used for discharging the liquid. According to the utility model, residual liquid in the spent fuel storage and transportation container is quickly pressed into the gas-water separation module to carry out gas-water separation, so that the residual water can be discharged thoroughly, the drying efficiency is improved, the drying effect is improved, and the spent fuel loading time is shortened.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without novel efforts for a person skilled in the art.

FIG. 1 is a schematic diagram of a main body according to the present utility model;

FIG. 2 is a schematic diagram of the main body of the present utility model in a water-filled and air-exhausted stage;

FIG. 3 is a schematic view of the main body of the present utility model in the aeration-drainage stage;

fig. 4 is a schematic diagram of a main body in an inflation purge-hold-down stage according to the present utility model;

FIG. 5 is a schematic diagram of the main body of the present utility model in a vacuum drying stage;

FIG. 6 is a schematic diagram of the main body of the present utility model in a gas filling stage;

FIG. 7 is a schematic diagram of the main body in a cooling-by-circulation stage according to the present utility model;

fig. 8 is a schematic diagram of the main body provided by the utility model in a temporary pressure release stage;

FIG. 9 is a schematic diagram of the main body of the present utility model in an auxiliary drainage stage;

FIG. 10 is a schematic diagram of the main body of the present utility model in a cleaning stage;

FIG. 11 is a schematic diagram of a front view of a spent fuel pre-storage and transportation treatment device according to the present utility model;

fig. 12 is a schematic left-view structural diagram of the spent fuel pre-treatment equipment provided by the utility model.

Wherein, in fig. 1-12:

the main body 100, the aeration module 101, the gas-water separation module 102, the first switch valve 103, the first container interface 104, the second container interface 105, the spent fuel storage and transportation container 200, the liquid collection device 300, the gas source interface 101a, the gas filter 101b, the first pressure transmitter 101c, the second switch valve 101d, the gas-water separator 102a, the third switch valve 102b, the fourth switch valve 102c, the drain connector 102d, the water filling module 106, the first switch structure 107, the second switch structure 108, the safety heat exchange module 109, the third switch structure 110, the fourth switch structure 111, the water source interface 106a, the return water interface 106b, the flow regulating valve 106c, the bypass flow regulating valve 106d, the vacuum drying module 112, the third container interface 113, the fourth container interface 114, the fifth switch valve 115, the vacuum pump 112a, the dust filter 112b, the oil filter 112c, the sixth switch valve 112d, the seventh switch valve 112e, the separator 112g, the exhaust gas discharge module, the exhaust filter 116a, the exhaust gas regulating valve 116b, the gas sampling interface 116c, the exhaust sampling interface 116f, the exhaust system control interface 400 f.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1 to 12 in the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without novel efforts, are intended to fall within the scope of this utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top surface", "bottom surface", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the indicated positions or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limitations of the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It should be noted that, the communication in this context may be a direct connection between adjacent components, or may be a connection through a pipe, etc., where the interface is blocked in an initial state, and is in a conductive state when the connection is made.

Referring to FIGS. 1-12, a first aspect of the present utility model provides a spent fuel pre-storage and handling equipment for reducing spent fuel loading time.

It will be appreciated that the spent fuel pre-storage treatment equipment provided by the present utility model is not limited to use with the spent fuel storage vessel 200, but may be used with other vessels or devices to be dried.

Specifically, the spent fuel storage and transportation pretreatment equipment comprises a main body 100, wherein the main body 100 comprises an inflation module 101, a gas-water separation module 102 and a first switch valve 103, as shown in fig. 1, and in order to facilitate the integration of all parts, the utility model discloses that the main body 100 further comprises a frame, wherein the inflation module 101, the gas-water separation module 102 and the first switch valve 103 are all arranged on the frame, and the frame can be formed by splicing sectional materials, or can be formed by welding rods, pipes or the like, as shown in fig. 11 and 12. The frame has sufficient strength and rigidity to secure the components. In order to facilitate moving the whole main body 100, the utility model discloses a lifting ring is arranged at the top end of a frame, a caster with a brake is arranged at the bottom end of the frame so as to facilitate pushing the main body 100, and a detachable door plate is arranged in the circumferential direction of the frame so as to facilitate transportation, installation and use.

The main body 100 is further provided with a first container interface 104 and a second container interface 105, wherein the first container interface 104 can be connected with a gas port of the spent fuel storage and transportation container 200, and the second container interface 105 can be connected with a liquid port of the spent fuel storage and transportation container 200.

The gas outlet of the aeration module 101 communicates with a first container interface 104, a second container interface 105 communicates with a first interface of a first on-off valve 103, and a second interface of the first on-off valve 103 communicates with an inlet of the gas-water separation module 102. Specifically, the first switching valve 103 is an adjustable opening degree adjusting valve, for example, an electrically controlled ball valve, etc., and the first switching valve 103 is an electrically controlled ball valve with an adjustable opening degree, which is only one specific embodiment of the present utility model, and in practical application, the first switching valve 103 may be a manual switching valve, etc.

The gas outlet of the gas-water separation module 102 is for communication with a gas discharge system, and the liquid outlet of the gas-water separation module 102 is for communication with a liquid collection device 300. Specifically, the liquid collection device 300 may be a loading well or the like.

The first on-off valve 103 is opened when the pressure in the spent fuel storage and transportation container 200 is greater than or equal to a preset pressure value, and the first on-off valve 103 is closed when the pressure in the spent fuel storage and transportation container 200 is less than the preset pressure value.

It should be noted that the preset pressure value refers to a safety pressure value set according to the design pressure limit value of the spent fuel storage and transportation container 200, so as to avoid the safety problem caused by the overlarge pressure in the spent fuel storage and transportation container 200.

According to the pre-treatment equipment for the spent fuel storage and transportation, the gas is input into the spent fuel storage and transportation container 200, and when the pressure in the spent fuel storage and transportation container 200 is greater than or equal to the preset pressure, the first switch valve 103 is opened, so that the safety problem caused by overlarge pressure in the spent fuel storage and transportation container 200 is avoided. And the utility model fills gas into the spent fuel storage and transportation container 200 through the inflation module 101, when the pressure is greater than or equal to the preset pressure, the first switch valve 103 is opened, and the liquid is quickly pressed into the gas-water separation module 102 to carry out gas-water separation, so that the residual water in the spent fuel storage and transportation container 200 can be discharged more thoroughly, the drying efficiency is improved, the drying effect is improved, and the spent fuel loading time is shortened.

In some embodiments, the main body 100 further includes a water filling module 106, a first switching structure 107, and a second switching structure 108, and specifically, the water filling module 106 may enable communication between liquids between other modules, i.e. may supply water to other modules, and may also enable return water of other components.

The outlet of the water filling module 106 is in communication with a first interface of a first switching structure 107, a second interface of the first switching structure 107 is in communication with a second interface of the first switching valve 103, and a third interface of the first switching structure 107 is in communication with an inlet of the gas-water separation module 102. The first switching structure 107 is capable of switching to the second interface of the first switching structure 107 to communicate with the first interface or the third interface. It will be appreciated that when the second port of the first switching structure 107 communicates with the first port, then the third port is blocked; when the second port of the first switching structure 107 communicates with the third port, then the first port is blocked.

Specifically, the first switching structure 107 has at least 3 interfaces, and can switch between 1 interface and at least 2 other interfaces, for example, the first switching structure 107 may be a three-way valve, a four-way valve, a five-way valve, or the like, and only the interfaces, such as the four-way valve, the five-way valve, or the like, which are not needed, need to be plugged. To improve control of the first switching structure 107, the present utility model discloses that the first switching structure 107 is an electric three-way valve.

The first port of the second switching structure 108 communicates with the first container port 104, the second port of the second switching structure 108 communicates with the inlet of the gas-water separation module 102, and the third port of the second switching structure 108 communicates with the outlet of the aeration module 101. The second switching structure 108 is capable of switching to the first interface of the second switching structure 108 in communication with the second interface or the third interface. It will be appreciated that when the first interface of the second switching fabric 108 is in communication with the second interface, then the third interface is blocked; when the first port of the first switching structure 107 communicates with the third port, then the second port is blocked.

Specifically, the second switching structure 108 has at least 3 interfaces, and can switch between 1 interface and at least 2 other interfaces, for example, the second switching structure 108 may be a three-way valve, a four-way valve, a five-way valve, or the like, and only the interfaces, such as the four-way valve, the five-way valve, or the like, which are not needed, need to be blocked. To improve control of the second switching structure 108, the present utility model discloses that the second switching structure 108 is an electric three-way valve.

When the spent fuel storage and transportation container 200 needs to be inflated and drained, as shown in fig. 3, the first container interface 104 is communicated with the gas port of the spent fuel storage and transportation container 200, the second container interface 105 is communicated with the liquid port of the spent fuel storage and transportation container 200, the first switching structure 107 is switched to the second interface of the first switching structure 107 to be communicated with the third interface, the second switching structure 108 can be switched to the first interface of the second switching structure 108 to be communicated with the third interface, and the inflation module 101 starts to inflate and drain the spent fuel storage and transportation container 200.

The aeration purge of the spent fuel storage and transportation vessel 200 includes a continuous purge and a hold-down purge. Because the first switch valve 103 is an electrically controlled ball valve, when the pressure in the spent fuel storage and transportation container 200 is greater than or equal to a preset pressure value, the first switch valve 103 is opened, and when the pressure in the spent fuel storage and transportation container 200 is less than the preset pressure value, the first switch valve 103 is closed.

When the spent fuel storage and transportation container 200 is purged under pressure, as shown in fig. 4, the first container interface 104 is communicated with the gas port of the spent fuel storage and transportation container 200, the second container interface 105 is communicated with the liquid port of the spent fuel storage and transportation container 200, the first switch valve 103 is closed, the first switch structure 107 is switched to the second interface of the first switch structure 107 to be communicated with the third interface, the second switch structure 108 is switched to the first interface of the second switch structure 108 to be communicated with the third interface, the gas filling module 101 starts to fill gas with preset pressure into the spent fuel storage and transportation container 200, and then the first switch valve 103 is opened, and the gas with pressure extrudes the water vapor in the spent fuel storage and transportation container 200 to the gas-water separation module 102.

When the spent fuel storage and transportation container 200 is continuously purged, the first container interface 104 is communicated with the gas port of the spent fuel storage and transportation container 200, the second container interface 105 is communicated with the liquid port of the spent fuel storage and transportation container 200, the first switch valve 103 is opened, the first switch structure 107 is switched to the second interface of the first switch structure 107 to be communicated with the third interface, the second switch structure 108 is switched to the first interface of the second switch structure 108 to be communicated with the third interface, and the inflation module 101 is started to inflate the spent fuel storage and transportation container 200, so that the water vapor in the spent fuel storage and transportation container 200 is extruded to the gas-water separation module 102. During the continuous purge, the inflation module 101 is able to output a gas at a continuous steady pressure.

When auxiliary drainage of the spent fuel storage and transportation container 200 is required, as shown in fig. 9, the first container interface 104 is communicated with the gas port of the spent fuel storage and transportation container 200, and the second container interface 105 is not connected. The liquid port of the spent fuel storage and transportation container 200 is communicated with the drainage pump, the second switching structure 108 can be switched to the first port of the second switching structure 108 to be communicated with the third port, and the inflation module 101 is started to inflate the spent fuel storage and transportation container 200, so that the drainage pump can pump out the liquid in the spent fuel storage and transportation container 200, and auxiliary drainage is realized.

When the spent fuel storage and transportation container 200 needs to be filled with water and exhausted, as shown in fig. 2, the first container interface 104 is communicated with the gas port of the spent fuel storage and transportation container 200, the second container interface 105 is communicated with the liquid port of the spent fuel storage and transportation container 200, the first switch valve 103 is opened, the first switch structure 107 is switched to the first interface of the first switch structure 107 to be communicated with the second interface, the second switch structure 108 is switched to the first interface of the second switch structure 108 to be communicated with the second interface, and the water filling module 106 starts to fill water into the spent fuel storage and transportation container 200 so as to discharge the gas in the spent fuel storage and transportation container 200 into the gas-water separation module 102 for gas-water separation, thereby realizing the discharge of the gas. It should be noted that, the water filling module 106 may be a container with water stored therein or be externally connected with a water source, and in this embodiment, the liquid collecting device 300 used for discharging water from the gas-water separation module is taken as an example of the externally connected water source of the water filling module 106, so that the number of parts is reduced, and the cost is saved.

When the temporary pressure relief of the spent fuel storage and transportation container 200 is required, as shown in fig. 8, the first container interface 104 is communicated with the gas port of the spent fuel storage and transportation container 200, the second container interface 105 is communicated with the liquid port of the spent fuel storage and transportation container 200, the first switch valve 103 is closed, and the second switch structure 108 is switched to the first interface of the second switch structure 108 to be communicated with the second interface, so that the gas in the spent fuel storage and transportation container 200 can be rapidly discharged after gas-water separation through the gas-water separation module 102, the pressure relief of the spent fuel storage and transportation container 200 is realized, and the danger caused by the overlarge pressure in the spent fuel storage and transportation container 200 is avoided.

In some embodiments, the main body 100 further includes a safety heat exchange module 109, a third switching structure 110, and a fourth switching structure 111, where the safety heat exchange module 109 is any structure capable of achieving heat exchange.

The first interface of the third switching structure 110 communicates with the first interface of the second switching structure 108, the second interface of the third switching structure 110 communicates with the first container interface 104, the third interface of the third switching structure 110 communicates with the first gas interface of the safety heat exchange module 109, and the second gas interface of the safety heat exchange module 109 communicates with the first container interface 104. The third switching structure 110 is capable of switching to the first interface of the third switching structure 110 to communicate with the second interface or the third interface. It will be appreciated that when the first interface of the third switching structure 110 is in communication with the second interface, then the third interface is blocked; when the first interface of the third switching structure 110 communicates with the third interface, then the second interface is blocked.

Specifically, the third switching structure 110 may have at least 3 interfaces, and may be configured to be capable of switching between 1 interface and at least 2 other interfaces, for example, the third switching structure 110 may be a three-way valve, a four-way valve, a five-way valve, or the like, and only the interfaces, such as the four-way valve, the five-way valve, or the like, that are not needed may be blocked. In order to improve the control of the third switching structure 110, the present utility model discloses that the third switching structure 110 is an electric three-way valve.

The first interface of the fourth switching structure 111 communicates with the second interface of the first switch valve 103, the second interface of the fourth switching structure 111 communicates with the second interface of the first switching structure 107, the third interface of the fourth switching structure 111 communicates with the first liquid interface of the safety heat exchange module 109, and the second liquid interface of the safety heat exchange module 109 communicates with the second interface of the first switch valve 103. The second interface of the fourth switching structure 111, which can be switched to the fourth switching structure 111, communicates with the first interface or the third interface. It will be appreciated that when the second interface of the fourth switching structure 111 communicates with the first interface, then the third interface is blocked; when the second interface of the third switching structure 110 is in communication with the third interface, then the first interface is blocked.

Specifically, the fourth switching structure 111 has at least 3 ports, and can switch between 1 port and at least 2 other ports, for example, the fourth switching structure 111 may be a three-way valve, a four-way valve, a five-way valve, or the like, and only the ports, such as the four-way valve or the five-way valve, that are not needed may be blocked. In order to improve control of the fourth switching structure 111, the present utility model discloses that the fourth switching structure 111 is an electric three-way valve.

When the spent fuel storage and transportation container 200 needs to be cooled, as shown in fig. 7, the first switch valve 103 is opened, the first switch structure 107 is switched to the first interface and the second interface of the first switch structure 107, the second switch structure 108 is switched to the first interface and the second interface of the second switch structure 108, the third switch structure 110 is switched to the first interface and the third interface of the third switch structure 110, the second interface of the fourth switch structure 111 is switched to the third interface of the fourth switch structure 111, the water filling module 106 is started to fill water into the spent fuel storage and transportation container 200, so that liquid can flow through the safety heat exchange module 109 and then enter the spent fuel storage and transportation container 200, and gas discharged from the spent fuel storage and transportation container 200 flows through the safety heat exchange module 109 and then enters the gas-water separation module 102 for gas-water separation and then is discharged. When the difference between the water temperature at the outlet of the spent fuel storage and transportation container 200 and the water temperature at the inlet of the container is smaller, the third switching structure 110 and the fourth switching structure 111 are switched to shield the safety heat exchange module 109, and the cooling liquid in the loop directly enters the spent fuel storage and transportation container 200, so that the heat exchange rate is improved. The water temperature in the spent fuel storage and transportation container 200 is different from the water temperature of the water source by the continuous replacement of the low-temperature water until the difference is smaller than the set value, and the set value can be set according to the requirement.

The water filling module 106 provides a stable cooling water source and completes the heat exchange between the cooling liquid and the high temperature gas or liquid exhausted from the spent fuel storage and transportation vessel 200 in the safety heat exchange module 109. The heat exchange power of the safety heat exchange module 109 meets the heat exchange requirement when the spent fuel storage and transportation container 200 reaches the internal high temperature limit value, ensures that the temperature of cooling water entering the spent fuel storage and transportation container 200 is in a proper range, avoids damage to the cladding of the spent fuel assembly caused by excessive temperature stress, and ensures safety. Namely, the utility model realizes the effective cooling of the spent fuel storage and transportation container 200 by arranging the safety heat exchange module 109, and further improves the safety.

When the spent fuel pre-treatment device is subjected to several use periods or excessive accumulation of radioactive substances and needs to clean the main body 100, as shown in fig. 10, the first container interface 104 is communicated with the second container interface 105, the first interface of the first switching structure 107 is communicated with the second interface, the second switching structure 108 can be switched to the first interface of the second switching structure 108 to be communicated with the second interface, the first switching valve 103 is opened, the third switching structure 110 can be switched to the first interface of the third switching structure 110 to be communicated with the third interface, the fourth switching structure 111 can be switched to the second interface of the fourth switching structure 111 to be communicated with the third interface, and the water filling module 106 is started to fill water into the spent fuel pre-treatment device, so that liquid can flow through the safety heat exchange module 109 and the gas-water separation module to clean pipes and equipment in the loop.

When the temporary pressure relief of the spent fuel storage and transportation container 200 is required, as shown in fig. 8, the third switching structure 110 is switched to the first interface of the third switching structure 110 to communicate with the second interface.

In some embodiments, the main body 100 further includes a vacuum drying module 112 for vacuum drying the spent fuel storage and transportation container 200.

The main body 100 is further provided with a third container port 113 and a fourth container port 114, the third container port 113 is capable of being connected to a gas port of the spent fuel storage and transportation container 200, and the fourth container port 114 is capable of being connected to a liquid port of the spent fuel storage and transportation container 200.

The first port of the vacuum drying module 112 is in communication with the third container port 113 and the fourth container port 114, respectively, and the second port of the vacuum drying module 112 is for communication with a gas exhaust system.

When the spent fuel storage and transportation container 200 needs to be vacuum dried, as shown in fig. 5, the third container interface 113 is communicated with the gas port of the spent fuel storage and transportation container 200, the fourth container interface 114 is communicated with the liquid port of the spent fuel storage and transportation container 200, the second interface of the vacuum drying module 112 is communicated with the gas discharge system, and the vacuum drying module 112 is started to vacuum dry the spent fuel storage and transportation container 200.

When the sixth on-off valve 112d is provided, the opening degree of the sixth on-off valve 112d may be adjusted according to the process requirement during the vacuum drying, so as to adjust the intake air amount, and avoid the icing phenomenon caused by the too fast pumping speed (the process schematic diagram refers to fig. 5).

Further, the present utility model discloses that the main body 100 further includes a fifth switch valve 115, a first port of the fifth switch valve 115 is communicated with the inflation module 101, and a second port of the fifth switch valve 115 is respectively communicated with the first port of the vacuum drying module 112, the third container port 113 and the fourth container port 114.

When the spent fuel storage and transportation container 200 needs to be filled with gas, as shown in fig. 6, the third container interface 113 is communicated with the gas port of the spent fuel storage and transportation container 200, the fourth container interface 114 is communicated with the liquid port of the spent fuel storage and transportation container 200, the fifth switch valve 115 is opened, and the inflation module 101 fills the spent fuel storage and transportation container 200 with gas through the third container interface 113 and the fourth container interface 114.

When pressure drop leak detection of the spent fuel storage and transportation vessel 200 is required, it can be done by two methods:

the method comprises the following steps: the third container port 113 is connected to the gas port of the spent fuel storage and transportation container 200, the fourth container port 114 is connected to the liquid port of the spent fuel storage and transportation container 200, and after filling the spent fuel storage and transportation container 200 with a predetermined amount of gas, the fifth on-off valve 115 is closed to perform a pressure maintaining test. The pressure drop method is to connect the interface of the spent fuel storage and transportation container 200 with the container leak hole and then to reach a certain pressure to the gas (helium etc.) in the leak detection part such as the container cover, the device in this process is consistent with the process of filling the spent fuel storage and transportation container 200 with gas.

The second method is as follows: the third container interface 113 is communicated with the gas port of the spent fuel storage and transportation container 200, the fourth container interface 114 is communicated with the liquid port of the spent fuel storage and transportation container 200, the fifth switch valve 115 is closed, the vacuum drying module 112 is started to vacuumize the spent fuel storage and transportation container 200 to a preset vacuum degree, the connection between the vacuum drying module 112 and the spent fuel storage and transportation container 200 is disconnected (when the sixth switch valve 112d is arranged, the sixth switch valve 112d is also required to be closed), and a pressure maintaining test is performed. The method is characterized in that the interface of the spent fuel storage and transportation container 200 is connected with a container leakage hole, and then the vacuum is pumped into leakage detection parts such as a container cover and the like to reach a certain vacuum degree, and the main body 100 in the process is consistent with the vacuum drying process.

In some embodiments, the body 100 further includes an exhaust emission module 116, the inlet of the exhaust emission module 116 and the second interface of the vacuum drying module 112 are respectively in communication with the gas outlet of the gas-water separation module 102, the outlet of the exhaust emission module 116 being for communication with a gas exhaust system of the nuclear power plant.

The utility model realizes that the gas separated by the gas-water separation module 102 is discharged after being treated by arranging the waste gas discharge module 116, thereby avoiding environmental pollution and further improving the safety.

In some embodiments, the spent fuel pre-storage treatment equipment further comprises an electronic control system, a water scooping module, and a transfer assembly.

The electric control system is in signal connection with each electric device on the main body 100 to realize automatic control of each electric device, so that manual operation is avoided, manpower is saved, and safety is improved. More specifically, the electric control system adopts a remote centralized control mode, and meanwhile, a control cabinet control mode is redundant, and the remote control PC performs TCP/IP communication with a control cabinet integrated in the equipment through the Ethernet, so that a man-machine operation interface is provided for operators. The control system 400 invokes corresponding control subroutines according to different process parameters of each spent fuel storage and transportation container 200 to realize automatic control of the process of different types of containers.

The water drawing module is used for supplying liquid to the main body 100, and specifically, the water drawing module comprises a submersible pump and a carrying trolley.

The switching components are installed at each interface of the main body 100 for connecting the spent fuel storage and transportation containers 200, so as to realize switching of the different types of the spent fuel storage and transportation containers 200, thereby improving the universality of the spent fuel pre-storage and transportation treatment equipment.

As shown in fig. 1, the present utility model specifically discloses that the inflation module 101 includes a gas source interface 101a, a gas filter 101b, a first pressure transmitter 101c, and a second on-off valve 101d.

The gas source interface 101a is used for communicating with a gas source, specifically, helium, and it should be noted that the gas source may be other inert gas or compressed air.

The inlet of the gas filter 101b is communicated with the gas source interface 101a, the outlet of the gas filter 101b is communicated with the inlet of the first pressure transmitter 101c, the outlet of the first pressure changer is communicated with the first interface of the second switch valve 101d, and the second interface of the second switch valve 101d is the gas outlet of the inflation module 101.

The use of the gas filter 101b can filter out impurities in the gas source, prevent the impurities from entering the spent fuel storage and transportation container 200, and improve safety.

The first pressure transmitter is used for adjusting the air source pressure.

The gas source port 101a, the gas filter 101b, the first pressure transmitter 101c, and the second switching valve 101d may be connected to each other through a pipe, or may be connected directly to each other.

In order to facilitate detection of the air source output flow rate, a flow meter or the like may be installed between the second on-off valve 101d and the first pressure varying device.

It will be appreciated that initiating operation of the inflation module 101 means that the air supply is connected to the air supply interface 101a and the inflation module 101 is capable of supplying air to the other modules.

Further, the present utility model discloses that the second on-off valve 101d is an electric ball valve, and it is understood that the second on-off valve 101d may be another valve capable of being opened and closed.

Further, the utility model discloses that the safety heat exchange module 109 is a plate heat exchanger. It should be noted that the use of the plate heat exchanger as the safety heat exchange module 109 is only one embodiment of the present utility model, and in practical applications, the safety heat exchange module 109 may be provided in other structures capable of realizing heat exchange.

Further, the present utility model specifically discloses that the gas-water separation module 102 includes a gas-water separator 102a, a third switch valve 102b, a fourth switch valve 102c, and a drain port connector 102d.

The inlet of the gas-water separator 102a is the inlet of the gas-water separation module 102, the gas outlet of the gas-water separator 102a is communicated with the first interface of the third switch valve 102b, the second interface of the third switch valve 102b is the gas outlet of the gas-water separation module 102, and the gas separated by the gas-water separator 102a is discharged through the second interface of the third switch valve 102 b.

The liquid outlet of the gas-water separator 102a is communicated with the first interface of the fourth switch valve 102c, the second interface of the fourth switch valve 102c is communicated with the water outlet joint 102d, and the water outlet joint 102d is the liquid outlet of the gas-water separation module 102.

Specifically, the utility model discloses a third switch valve 102b and a fourth switch valve 102c which are all electric ball valves, the gas-water separator 102a has a water level self-adaptive adjusting function, and an operator is not required to operate the state of the fourth switch valve 102c according to the liquid level of the gas-water separator 102a, so that the system is ensured to be in a gas-water balance state.

Further, the present disclosure discloses that water fill module 106 includes a water source interface 106a, a return water interface 106b, a flow regulator valve 106c, and a bypass flow regulator valve 106d.

The water source interface 106a and the water return interface 106b are respectively used for communicating with a water source, and the water source may be a device that separately provides a water source, or may be water stored in the liquid collection device 300.

The inlet of the flow regulating valve 106c and the inlet of the bypass flow regulating valve 106d are respectively communicated with the water source interface 106a, the outlet of the bypass flow regulating valve 106d is communicated with the backwater interface 106b, and the outlet of the flow regulating valve 106c is the outlet of the water filling module 106.

The bypass flow rate control valve 106d and the flow rate control valve 106c are electric control valves, so that automatic control of the opening degrees of the bypass flow rate control valve 106d and the flow rate control valve 106c is facilitated.

To facilitate monitoring of the output flow of the water filling module 106, the present utility model discloses a flow meter installed between the flow regulating valve 106c and the first interface of the first switching structure 107.

Further, the present utility model specifically discloses that the vacuum drying module 112 includes a vacuum pump 112a, a second pressure transmitter, a dust removal filter 112b, an oil filter 112c, a sixth switch valve 112d, and a seventh switch valve 112e.

The first interface of the sixth switch valve 112d is the first interface of the vacuum drying module 112, the second interface of the sixth switch valve 112d is communicated with the inlet of the dust removal filter 112b, the outlet of the dust removal filter 112b is communicated with the inlet of the vacuum pump 112a, the outlet of the vacuum pump 112a is communicated with the inlet of the oil filter 112c, the gas outlet of the oil filter 112c is communicated with the first interface of the seventh switch valve 112e, and the second interface of the seventh switch valve 112e is the second interface of the vacuum drying module 112.

Still further, the vacuum drying module 112 further includes a tenth switch valve 112f, as shown in fig. 1, wherein a first port of the tenth switch valve 112f is respectively communicated with a first port of the sixth switch valve 112d, a third container port 113 and a fourth container port 114, and a second port of the tenth switch valve 112f is respectively communicated with an inlet of the exhaust gas discharging module 116, a second port of the seventh switch valve 112e and a gas outlet of the gas-water separation module 102.

In order to facilitate the control of each state of the vacuum drying module 112, the present utility model discloses that the sixth switch valve 112d, the seventh switch valve 112e and the tenth switch valve 112f are all electric ball valves.

Further, the present disclosure specifically discloses that the exhaust emission module 116 includes an exhaust filter 116a, an exhaust regulator 116b, a gas sampling interface 116c, and a gas sampling return interface 116d.

The exhaust emission module 116 further includes an exhaust emission interface 116e, the exhaust emission interface 116e being for connection with a gas emission system of the nuclear power plant.

Specifically, the exhaust gas filter 116a is a high-efficiency gas filter.

The first port of the exhaust gas regulating valve 116b is an inlet of the exhaust gas discharge module 116, the second port of the exhaust gas regulating valve 116b is communicated with an inlet of the exhaust gas filter 116a, and an outlet of the exhaust gas filter 116a is used for discharging the filtered gas.

The gas sampling port 116c is connected to the first port of the exhaust gas control valve 116b via an eighth switching valve, and the gas sampling return port 116d is connected to the second port of the exhaust gas control valve 116b via a ninth switching valve.

When sampling, the first sampling interface of the sampling analysis device is communicated with the gas sampling interface 116c, the first container interface 104 is communicated with the gas port of the spent fuel storage and transportation container 200, the second container interface 105 is communicated with the liquid port of the spent fuel storage and transportation container 200, the second sampling interface of the sampling analysis device is communicated with the gas sampling reflux interface 116d, the eighth switch valve and the ninth switch valve are opened, and the inflation module 101 works.

To improve sampling accuracy, the utility model discloses that the sampling is in a continuous purge stage.

When the spent fuel pre-storage treatment equipment is used for quick drying, the first container interface 104 is communicated with a gas port of the spent fuel storage and transportation container 200, the second container interface 105 is communicated with a liquid port of the spent fuel storage and transportation container 200, a gas outlet of the gas-water separation module 102 is communicated with the waste gas emission module 116 of the spent fuel pre-storage treatment equipment, and a liquid outlet of the gas-water separation module 102a is communicated with the liquid collection device 300; starting the inflation module 101, closing the first switch valve 103, and inflating the spent fuel storage and transportation container 200 with gas until the pressure in the spent fuel storage and transportation container 200 is greater than or equal to a preset pressure value, at this time, opening the first switch valve 103, discharging the liquid in the spent fuel storage and transportation container 200 to the gas-water separation module 102 under the action of the gas pressure, discharging the gas to the exhaust emission module 116 through a gas outlet of the gas-water separation module 102 after gas-liquid separation, and discharging the liquid to the liquid collecting device 300 through a liquid outlet of the gas-water separation module 102; when the pressure in the spent fuel storage and transportation container 200 is less than the preset pressure value, the first switch valve 103 is closed and the above steps are repeated until the liquid outlet in the gas-water separation module 102 no longer discharges liquid.

When the spent fuel pre-storage treatment equipment includes a safety heat exchange module 109, the method of flash drying includes:

connecting the inflation module 101 with a gas source, the first container interface 104 being in communication with a gas port of the spent fuel storage and transportation container 200, the second container interface 105 being in communication with a liquid port of the spent fuel storage and transportation container 200;

the gas source is regulated to the required pressure through the inflation module 101, and meanwhile, the gas flows through the safety heat exchange module 109 through the first switching structure 107, the second switching structure 108, the third switching structure 110 and the fourth switching structure 111, and the gas is inflated into the spent fuel storage and transportation container 200 after passing through the safety heat exchange module 109;

closing the first switch valve 103, so that the gas filled in the spent fuel storage and transportation container 200 is continuously accumulated in the spent fuel storage and transportation container 200 until reaching a preset value lower than the safety pressure limit value of the spent fuel storage and transportation container 200;

when the pressure in the spent fuel storage and transportation container 200 reaches a preset value, the first switch valve 103 is automatically opened, the residual water in the spent fuel storage and transportation container 200 is extruded to the gas-water separation module 102 under the drive of pressure gas, after the water is separated in the gas-water separation module 102, the liquid is discharged to a canning pond through a drainage pipeline of the gas-water separation module 102, and the gas is filtered and discharged to a gas discharge system through the exhaust gas discharge module 116;

When the pressure in the spent fuel storage and transportation container 200 gradually decreases to a set value, the first switch valve 103 is automatically closed, and the gas accumulation in the spent fuel storage and transportation container is restarted;

the above steps are repeated until the water is no longer being drained by the water-vapor separation module 102.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and 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 present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims

1. A spent fuel pre-storage treatment device, comprising a main body;

2. The pre-storage and transportation treatment equipment for spent fuel according to claim 1, wherein the inflation module comprises a gas source interface, a gas filter, a first pressure transmitter and a second switch valve,

and/or

3. The spent fuel pre-storage treatment equipment of claim 1, wherein the main body further comprises a water filling module, a first switching structure, and a second switching structure;

4. The spent fuel pre-storage treatment equipment of claim 3, wherein the main body further comprises a safety heat exchange module, a third switching structure, and a fourth switching structure;

5. The pre-treatment plant for spent fuel storage and transportation according to claim 4, wherein the water filling module comprises a water source interface, a water return interface, a bypass flow regulating valve and a flow regulating valve,

and/or

The safety heat exchange module is a plate heat exchanger.

6. The spent fuel pre-shipment treatment facility of claim 1, wherein the main body further comprises a vacuum drying module;

7. The spent fuel pre-storage treatment equipment of claim 6, wherein the main body further comprises a fifth on-off valve;

or alternatively

8. The spent fuel pre-storage treatment equipment of claim 6, wherein the vacuum drying module comprises a vacuum pump, a second pressure transmitter, a dust removal filter, an oil filtration filter, a sixth on-off valve, and a seventh on-off valve;

9. The spent fuel pre-storage treatment equipment of claim 6, wherein the main body further comprises an exhaust emission module;

10. The spent fuel pre-storage treatment equipment of claim 9, wherein the exhaust emission module comprises an exhaust filter, an exhaust regulator valve, a gas sampling interface, and a gas sampling return interface;

11. The pre-fuel storage and handling treatment equipment according to any one of claims 1 to 10, further comprising an electronic control system, a water scooping module and a transfer assembly;

the water drawing module is used for supplying liquid to the main body;