CN117622377A - Nuclear fuel loading and unloading ship - Google Patents

Abstract

The invention belongs to the technical field of nuclear power ship design, and particularly relates to a nuclear fuel loading and unloading ship capable of serving most nuclear power ships. The ship comprises a plurality of ballast tanks and empty tanks, wherein the ballast tanks are mainly arranged at the two sides and the bottom of the ship, and the empty tanks are mainly arranged in the ship and the bow of the ship; the deck house, the engine room and the rudder engine room are arranged at the stern; the spent fuel cabin, the new fuel cabin and the spent fuel sending cabin are arranged in the middle area of the ship; the spent fuel cabin comprises a spent fuel pool, wherein shielding water is filled in the spent fuel pool, and a lifting grid and a plurality of spent fuel storage grids are fixed at the bottom of the spent fuel pool; the deck at the top of the spent fuel cabin is provided with a spent fuel cabin hanging port which is positioned right above the lifting grid, and the spent fuel cabin hanging port is opened or closed through a spent fuel cabin top cover. The invention can be widely applied to loading and unloading materials of various nuclear power ships, and provides new methods and basis for all relevant designs based on the loading and unloading materials of the ships.

Description

Nuclear fuel loading and unloading ship

Technical Field

The invention belongs to the technical field of nuclear power ship design, and particularly relates to a nuclear fuel loading and unloading ship capable of serving most nuclear power ships.

Background

The nuclear powered vessel has the following significant advantages over conventional powered vessels: 1. the nuclear energy is used as clean energy, so that the problem of exhaust emission caused by petroleum product fuel can be effectively avoided; 2. the nuclear power ship has extremely strong self-sustaining force, can operate for years after being filled with fuel once, greatly avoids the situation of filling fuel by port, shortens non-operation time and improves operation efficiency.

However, once the nuclear fuel needs to be replaced, the precise and safe design is necessary for the refueling operation in order to ensure that the leakage of the nuclear waste gas and the like does not occur due to the radiation hazard and the possibly caused nuclear pollution and the bad social influence.

Meanwhile, the shipboard nuclear facilities cannot have sufficient site conditions for setting special spent fuel storage, loading and unloading yards like the land nuclear facilities; moreover, marine nuclear fuel consumption is very slow compared to land-based nuclear facilities, especially nuclear power plants, and it is often only necessary to replace once a few years or even a few tens of years, if a refueling compartment is provided on a single vessel, it is very uneconomical. The loading and unloading by using the berthing base or the dock must cause the nuclear power ships or the platforms which are in operation to return to the navigation and stop, the refueling period is long, one or more matched fuel loading and unloading bases are needed to be built, the construction cost of land bases is high, the period is long, and when the number of the nuclear power ships or the platforms which need to be loaded and reloaded is increased, the land bases are difficult to meet corresponding requirements. Thus, it is a more operable solution to design a mobile seawater loading and unloading vessel that can provide loading and unloading services for other nuclear powered vessels.

Disclosure of Invention

The invention aims to provide a nuclear fuel loading and unloading ship capable of serving nuclear power ships for loading and unloading nuclear fuel, reasonable cabin and equipment arrangement related to the reloading, and a loading and unloading method with operability and safety. The invention can be widely applied to loading and unloading materials of various nuclear power ships, and provides new methods and basis for all relevant designs based on the loading and unloading materials of the ships.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

a nuclear fuel loading and unloading ship comprises a plurality of ballast tanks and empty tanks, wherein the ballast tanks are mainly arranged at the two sides and the bottom of the ship, and the empty tanks are mainly arranged in the ship and the bow of the ship; the deck house, the engine room and the rudder engine room are arranged at the stern; the spent fuel cabin, the new fuel cabin and the spent fuel sending cabin are arranged in the middle area of the ship;

the spent fuel cabin comprises a spent fuel pool, wherein shielding water is filled in the spent fuel pool, and a lifting grid and a plurality of spent fuel storage grids are fixed at the bottom of the spent fuel pool; the deck at the top of the spent fuel cabin is provided with a spent fuel cabin hanging port which is positioned right above the lifting grid, and the spent fuel cabin hanging port is opened or closed through a spent fuel cabin top cover; the upper part of the spent fuel cabin is welded with a man-bridge crane, the operation corridor is a platform positioned in the middle of the spent fuel cabin, the platform is higher than the water level of the spent fuel pool, one side of the operation corridor is welded and fixed with the four walls of the spent fuel cabin, and one side of the operation corridor facing the pool is provided with a water retaining coaming;

the new fuel bilge plane is provided with a new fuel storage room, a new fuel inspection room, a new fuel receiving room and a new fuel lifting grid; the new fuel cabin is provided with a new fuel cabin auxiliary crane at the upper part, a new fuel charging hanging port is arranged at the top of the new fuel cabin and is positioned right above the new fuel hanging grid, the new fuel charging hanging port is opened or closed through a new fuel charging hanging port top cover, a new fuel container hanging port is arranged at the top of the new fuel cabin and is positioned right above a new fuel receiving room, and the new fuel container hanging port is opened or closed through a container hanging port top cover;

the spent fuel sending cabin comprises a transmission pipe, a valve, a container loading well, a container preparation well, a container receiving and sending room, a spent fuel sending hanging port cabin cover, a sending cabin auxiliary crane and a new spent fuel middle partition wall; the transmission pipe and the valve are arranged on a wall plate between the spent fuel cabin and the spent fuel sending cabin, a spent fuel sending hanging port is formed right above the top of the spent fuel sending cabin and the receiving and dispatching room of the container, and the spent fuel sending hanging port is opened or closed through a spent fuel sending hanging port cabin cover; the upper part of the spent fuel sending cabin is provided with an auxiliary sending cabin crane, the new fuel cabin and the spent fuel sending cabin are separated by a new spent fuel middle partition wall, and the whole formed by the new fuel cabin and the spent fuel sending cabin are longitudinally arranged along the captain;

the large-scale rotary crane is arranged in a bow area, the material crane is arranged on the top of a new fuel cabin or a spent fuel sending cabin, the fluke is arranged on the bow part and the tail part of the ship, the anchor winch is used for winding and unwinding the fluke, and a loading and unloading workbin is fixed on a deck.

Four corners of the ship are provided with 8 anchor claws and are provided with 8 corresponding anchor windlass.

The shielding water submerges the lifting grillwork and the spent fuel storage grillwork.

The top of the spent fuel cabin is higher than the plane of the main deck, and the working corridor is kept at the same height with the main deck.

The height of the water retaining coaming is more than 0.8 meter.

The radiation shielding layer is installed on the perimeter of the spent fuel cabin, the new fuel cabin and the spent fuel sending cabin.

And (3) completing loading and unloading of the target ship:

s1, sailing the ship close to a target ship or a platform, ensuring proper positions of the two parties, and fixing the two parties;

s2, releasing flukes to be anchored by using an anchor winch, so as to ensure the stability of the ship;

s3, lifting the loading and unloading material box to a designated position of a target ship by using a large rotary crane to carry out unloading operation;

s4, lifting the loading and unloading workbin after the unloading operation is finished to a target position at the top of the spent fuel cabin of the ship, ensuring that an opening at the bottom of the loading and unloading workbin is aligned with a hanging opening of the spent fuel cabin, opening a top cover of the spent fuel cabin, and lifting the spent fuel into the spent fuel cabin through a crane in the loading and unloading workbin and falling into a lifting grid;

s5, after all spent fuel is lifted, closing a spent fuel cabin lifting opening, lifting a loading and unloading workbin to a target position at the top of a new fuel cabin of the ship, and ensuring that an opening at the bottom of the loading and unloading workbin is aligned with a new fuel loading lifting opening;

s6, transporting the new fuel in the new fuel storage room to a new fuel inspection room through a new fuel cabin auxiliary crane, and hoisting the new fuel to a new fuel hoisting grid after inspection;

s7, opening a top cover of a new fuel charging hanging port, and hanging the new fuel in the new fuel hanging grid into the loading and unloading material box through a crane in the loading and unloading material box;

s8, after all the required new fuel is suspended into the loading and unloading material box, closing a top cover of a new fuel loading suspended port;

s9, lifting the loading and unloading material box to a designated position of the target ship for loading operation;

s10, hoisting the spent fuel in the hoisting grid in the spent fuel cabin to a spent fuel storage grid through a man-bridge crane;

s11, the next furnace fuel loading and unloading is repeated S1-S8.

Finishing spent fuel post-treatment:

when the spent fuel is stored to a certain amount, the spent fuel is required to be transported to land landfills;

s1, recovering flukes by using a mooring machine, and driving the ship to a specified wharf;

s2, releasing the flukes again to stabilize the ship;

s3, lifting and tipping the spent fuel in the spent fuel storage grillwork, conveying the spent fuel to a container loading well in the spent fuel sending cabin through a conveying pipe and a valve to be filled into a specific container, conveying the spent fuel to a container preparing well for sending preparation, and conveying the spent fuel to a container receiving room;

s4, opening a spent fuel sending hanging hatch cover at the top spent fuel sending hanging port;

s5, lifting the specific container to a container transfer trolley through a material crane, and transporting to a specified wharf to finish transfer.

And (3) finishing new fuel storage:

s1, transporting new fuel to a main deck through a container transfer vehicle,

s2, opening a container hanging port top cover at the hanging port of the new material container,

s3, lifting the specific container from the container transfer trolley to a new fuel receiving room through a material crane;

s4, lifting the new fuel cabin auxiliary crane to a new fuel storage room for storage;

s5, closing the top cover of the hanging port of the container.

The beneficial effects obtained by the invention are as follows:

1) Compared with land-based loading and unloading means, the loading and unloading operation has less restriction on places.

2) Based on the characteristics of low refueling frequency of the nuclear energy ship, the nuclear fuel loading and unloading ship does not need excessive storage facilities, and the construction cost of the nuclear fuel loading and unloading ship is far less than that of land-based loading and unloading facilities.

3) The nuclear fuel loading and unloading ship sails on the sea, and the cooling cost of a spent fuel pool and the like is low; particularly, the loading and unloading place can be changed at will according to the seasonal change (such as running to a low-temperature water area for operation).

4) Besides the loading and unloading function, the large rotary crane also has larger lifting operation capacity, and can carry out other lifting operations to improve the economy when no material changing operation exists.

Drawings

FIG. 1 is a side view of a nuclear fuel handling vessel (spent fuel sending pod side);

FIG. 2 is a side view of a nuclear fuel handling vessel (new tank side);

FIG. 3 is a main deck equipment layout;

FIG. 4 is a main deck level nacelle layout;

FIG. 5 is a plan view of a reload house;

FIG. 6 is a top plan view of the refuge compartment;

FIG. 7 is a schematic diagram of a discharge process;

FIG. 8 is a schematic diagram of a charging process;

FIG. 9 is a diagram of spent transport.

Detailed Description

The invention will now be described in detail with reference to the drawings and specific examples.

A nuclear fuel loading and unloading ship comprising a spent fuel tank 01, a new fuel tank 02, a spent fuel delivery tank 03, a multi-deck deckhouse 04, a cabin 05, a rudder cabin 06, a plurality of ballast tanks 07, a piping 08 and a plurality of empty tanks 09.

The spent fuel cabin 01 is a cabin positioned in the middle of a ship and mainly comprises a spent fuel pool 10; the spent fuel pool 10 is filled with shielding water 11 for shielding fuel radiation; a lifting grid 14 and a plurality of spent fuel storage grids 15 are fixed at the bottom of the spent fuel pool; the deck at the top of the spent fuel cabin 01 is provided with a spent fuel cabin hanging port 12 which is positioned right above a hanging grid 14 and is opened or closed by a spent fuel cabin top cover 13; the upper part of the spent fuel cabin 01 is welded with a man-bridge crane 16, the operation gallery 17 is a platform positioned in the middle of the spent fuel cabin 01, the platform is higher than the water level of the spent fuel pool 10, one side of the gallery is welded and fixed with the four walls of the spent fuel cabin, and a water retaining coaming 18 is arranged on one side of the pool facing the water.

The bottom plane of the new fuel cabin 02 is provided with a new fuel storage room 20, a new fuel inspection room 21, a new fuel receiving room 22 and a new fuel lifting grid 28; the new fuel cabin 02 is provided with a new fuel cabin auxiliary crane 23 at the upper part for lifting operation in the cabin, a new fuel charging hanging port 24 is arranged at the top of the new fuel cabin and is positioned right above a new fuel lifting grid 28, the new fuel charging hanging port is opened or closed through a charging hanging port top cover 25, a new fuel container hanging port 26 is arranged at the top of the new fuel cabin and is positioned right above a new fuel receiving room 22, and the new fuel container hanging port 26 is opened or closed through a container hanging port top cover 27.

The spent fuel sending cabin 03 comprises a transmission pipe, a valve 30, a container loading well 31, a container preparing well 32, a container receiving and dispatching room 33, a spent fuel sending hanging port 34, a spent fuel sending hanging port cabin cover 35, a sending cabin auxiliary crane 36 and a new spent fuel middle partition wall 37. The transfer pipe and the valve 30 are mounted on the wall plate between the spent fuel compartment 01 and the spent fuel sending compartment 03. A spent fuel sending hanging port 34 is formed at the top of the spent fuel sending cabin 03 and right above the container receiving and sending room 33, and the spent fuel sending hanging port cover 35 is opened or closed; a sending cabin auxiliary crane 36 is arranged at the upper part of the spent fuel sending cabin 03 and used for in-cabin lifting operation. The new fuel cabin 02 and the spent fuel sending cabin 03 are separated by a new spent fuel middle partition wall 37, and the whole of the new fuel cabin 02 and the spent fuel sending cabin 03 and the spent fuel cabin 01 are longitudinally arranged along the ship length.

The invention also provides a transfer and other equipment for the nuclear fuel loading and unloading ship, which comprises the following components: the large-scale rotary crane 41 is arranged on the deck of the ship, the material crane 42 is arranged on the top of the new fuel cabin 02 or the spent fuel sending cabin 03, the fluke 44 is arranged on the bow and the tail of the ship for loading and unloading operation, the ship body is stabilized, the anchor winch 45 is used for retracting the fluke 44, and the radiation shielding layer 46 is arranged on the peripheries of the spent fuel cabin 01, the new fuel cabin 02 and the spent fuel sending cabin 03 to prevent radiation leakage.

The nuclear fuel loading and unloading scheme of the invention also relates to an onshore facility, comprising a fuel container transfer trolley 43, a loading and unloading bin 47 and a wharf 48.

Cabin arrangement:

the ship mainly comprises a large number of ballast tanks 07 and empty tanks 09, wherein the two sides and the bottom of the ship are mainly provided with the ballast tanks and are used for adjusting the ship posture; the hollow cabin 09 is used as the main part of the ship middle and bow to increase the buoyancy of the ship; the deck house 04, the engine room 05 and the rudder engine room 06 are arranged at the stern; because the design requirements (generally, the radiation shielding layer 46 is arranged), such as radiation protection and leakage protection, and the like, the dead weight of the spent fuel cabin 01, the new fuel cabin 02 and the spent fuel sending cabin 03 is larger, the spent fuel cabin is arranged in the middle area of the ship, and the structural safety and the ship stability are facilitated. (as shown in FIG. 4)

Device arrangement:

the large slewing crane 41 is arranged in the bow area (above the empty cabin) in order to obtain a greater lifting capacity; the four corners of the vessel are provided with 8 pairs of flukes 44 for better stability when the vessel is berthed, and are equipped with corresponding 8 anchoring machines 45. (as shown in FIG. 3)

A loading and unloading bin 47 (shown in figure 1) is fixed on the deck

The spent fuel cabin 01 is internally provided with a spent fuel pool 10, a certain amount of shielding water 11 is filled in the pool, a submerged lifting grid 14 and a spent fuel storage grid 15 can be ensured, and enough water layer thickness is reserved for shielding radiation; the roof of the spent fuel cabin 01 is higher than the plane of the main deck, and the working gallery 17 can keep the same height with the main deck; the edge of one side of the operation gallery 17 facing the pool is provided with a water blocking coaming 18 with a height of more than 0.8 meter for blocking the sloshing, splashing and overflowing of the shielding water 11; the upper part of the spent fuel cabin is provided with a man-bridge crane 16 for reversing the operation in the cabin such as the fuel storage position and the like.

The operation steps are as follows:

first partially completed target ship loading and unloading material

S1, sailing the ship close to a target ship or a platform, ensuring proper positions of the two parties, and fixing the two parties;

s2, using a mooring machine 45 to release the flukes 44 for mooring, so as to ensure the stability of the ship;

s3, the loading and unloading bin 47 (refer to patent number ZL2021 2 2504187.7) is lifted to a designated position of a target ship by using the large rotary crane 41 to carry out unloading operation (refer to application number 202111210052.8 for an operation method)

S4, lifting the loading and unloading workbin 47 after unloading operation is completed to a target position on the top of the spent fuel cabin 01 of the ship, ensuring that the bottom opening of the loading and unloading workbin 47 is aligned with the spent fuel cabin lifting opening 12, opening the spent fuel cabin top cover 13, lifting the spent fuel into the spent fuel cabin 01 through a crane in the loading and unloading workbin 47, and falling into the lifting grid 14.

S5, after all spent fuel is lifted, the spent fuel cabin hanging opening 12 is closed, the loading and unloading workbin 47 is lifted to a target position at the top of the new fuel cabin 02 of the ship, and the bottom opening of the loading and unloading workbin 47 is aligned with the new fuel loading hanging opening 24.

S6, transporting the new fuel in the new fuel storage room 20 to the new fuel inspection room 21 by the new fuel cabin auxiliary crane 23, and lifting the new fuel to the new fuel lifting grid 28 after inspection.

S7, opening the top cover 25 of the new fuel charging hanging port, and hanging the new fuel in the new fuel hanging grid into the loading and unloading bin 47 by a crane in the loading and unloading bin 47.

S8, after all the required new fuel is suspended into the loading and unloading box 47, the new fuel loading suspended port top cover 25 is closed.

S9, lifting the loading and unloading bin 47 to a designated position of the target ship for loading operation (the operation method refers to application number 202111210052.8)

S10, hoisting the spent fuel in the hoisting grillwork 14 in the spent fuel cabin 01 to the spent fuel storage grillwork 15 through the man-bridge crane 16;

s11 next furnace fuel loading/unloading (repetition S1-S8)

The second part completes the post-treatment of the spent fuel

When the spent fuel is stored to a certain amount, the spent fuel is required to be transported to land landfills;

s1, the anchor claws 44 are recovered by using the anchor windlass 45, and the ship is driven to a specified quay 48 or the like.

S2 may again release fluke 44 to stabilize the vessel.

S3, the spent fuel in the spent fuel storage grillwork 15 is transported to a container loading well 31 in the spent fuel sending cabin 03 through a transmission pipe and a valve 30 to be filled into a specific container, then transported to a container preparing well 32 to be sent for preparation, and finally transported to a container receiving and sending room 33;

s4 opens the spent fuel sending hanging hatch 35 at the top spent fuel sending hanging hatch 34.

S5, lifting the specific container to the container transfer trolley 43 through the material crane 42, and transporting to the appointed wharf 48 to finish transfer.

Third partial completion of new fuel storage

S1, transporting new fuel to a main deck through a container transfer vehicle,

s2, opening a container hanging port top cover 27 at a new material container hanging port 26,

s3, lifting a specific container from a container transfer trolley 43 to the new fuel receiving room 22 through a material crane 42;

s4, lifting the new fuel cabin auxiliary crane 23 into the new fuel storage room 20 for storage.

S5, closing the container hanging port top cover 27.

The foregoing description of the preferred embodiments of the present invention is not intended to limit the scope of the invention, but rather to cover all equivalent variations and modifications in shape, construction, characteristics and spirit according to the scope of the present invention as defined in the appended claims.

Claims (9)

1. A nuclear fuel loading and unloading ship, characterized in that: the ship comprises a plurality of ballast tanks and empty tanks, wherein the ballast tanks are mainly arranged at the two sides and the bottom of the ship, and the empty tanks are mainly arranged in the ship and the bow of the ship; the deck house, the engine room and the rudder engine room are arranged at the stern; the spent fuel cabin, the new fuel cabin and the spent fuel sending cabin are arranged in the middle area of the ship;

the spent fuel cabin comprises a spent fuel pool, wherein shielding water is filled in the spent fuel pool, and a lifting grid and a plurality of spent fuel storage grids are fixed at the bottom of the spent fuel pool; the deck at the top of the spent fuel cabin is provided with a spent fuel cabin hanging port which is positioned right above the lifting grid, and the spent fuel cabin hanging port is opened or closed through a spent fuel cabin top cover; the upper part of the spent fuel cabin is welded with a man-bridge crane, the operation corridor is a platform positioned in the middle of the spent fuel cabin, the platform is higher than the water level of the spent fuel pool, one side of the operation corridor is welded and fixed with the four walls of the spent fuel cabin, and one side of the operation corridor facing the pool is provided with a water retaining coaming;

the new fuel bilge plane is provided with a new fuel storage room, a new fuel inspection room, a new fuel receiving room and a new fuel lifting grid; the new fuel cabin is provided with a new fuel cabin auxiliary crane at the upper part, a new fuel charging hanging port is arranged at the top of the new fuel cabin and is positioned right above the new fuel hanging grid, the new fuel charging hanging port is opened or closed through a new fuel charging hanging port top cover, a new fuel container hanging port is arranged at the top of the new fuel cabin and is positioned right above a new fuel receiving room, and the new fuel container hanging port is opened or closed through a container hanging port top cover;

the spent fuel sending cabin comprises a transmission pipe, a valve, a container loading well, a container preparation well, a container receiving and sending room, a spent fuel sending hanging port cabin cover, a sending cabin auxiliary crane and a new spent fuel middle partition wall; the transmission pipe and the valve are arranged on a wall plate between the spent fuel cabin and the spent fuel sending cabin, a spent fuel sending hanging port is formed right above the top of the spent fuel sending cabin and the receiving and dispatching room of the container, and the spent fuel sending hanging port is opened or closed through a spent fuel sending hanging port cabin cover; the upper part of the spent fuel sending cabin is provided with an auxiliary sending cabin crane, the new fuel cabin and the spent fuel sending cabin are separated by a new spent fuel middle partition wall, and the whole formed by the new fuel cabin and the spent fuel sending cabin are longitudinally arranged along the captain;

the large-scale rotary crane is arranged in a bow area, the material crane is arranged on the top of a new fuel cabin or a spent fuel sending cabin, the fluke is arranged on the bow part and the tail part of the ship, the anchor winch is used for winding and unwinding the fluke, and a loading and unloading workbin is fixed on a deck.

2. The nuclear fuel loading and unloading vessel according to claim 1, wherein: four corners of the ship are provided with 8 anchor claws and are provided with 8 corresponding anchor windlass.

3. The nuclear fuel loading and unloading vessel according to claim 1, wherein: the shielding water submerges the lifting grillwork and the spent fuel storage grillwork.

4. The nuclear fuel loading and unloading vessel according to claim 1, wherein: the top of the spent fuel cabin is higher than the plane of the main deck, and the working corridor is kept at the same height with the main deck.

5. The nuclear fuel loading and unloading vessel according to claim 1, wherein: the height of the water retaining coaming is more than 0.8 meter.

6. The nuclear fuel loading and unloading vessel according to claim 1, wherein: the radiation shielding layer is installed on the perimeter of the spent fuel cabin, the new fuel cabin and the spent fuel sending cabin.

7. The nuclear fuel loading and unloading vessel according to claim 1, wherein: and (3) completing loading and unloading of the target ship:

s1, sailing the ship close to a target ship or a platform, ensuring proper positions of the two parties, and fixing the two parties;

s2, releasing flukes to be anchored by using an anchor winch, so as to ensure the stability of the ship;

s3, lifting the loading and unloading material box to a designated position of a target ship by using a large rotary crane to carry out unloading operation;

s4, lifting the loading and unloading workbin after the unloading operation is finished to a target position at the top of the spent fuel cabin of the ship, ensuring that an opening at the bottom of the loading and unloading workbin is aligned with a hanging opening of the spent fuel cabin, opening a top cover of the spent fuel cabin, and lifting the spent fuel into the spent fuel cabin through a crane in the loading and unloading workbin and falling into a lifting grid;

s5, after all spent fuel is lifted, closing a spent fuel cabin lifting opening, lifting a loading and unloading workbin to a target position at the top of a new fuel cabin of the ship, and ensuring that an opening at the bottom of the loading and unloading workbin is aligned with a new fuel loading lifting opening;

s6, transporting the new fuel in the new fuel storage room to a new fuel inspection room through a new fuel cabin auxiliary crane, and hoisting the new fuel to a new fuel hoisting grid after inspection;

s7, opening a top cover of a new fuel charging hanging port, and hanging the new fuel in the new fuel hanging grid into the loading and unloading material box through a crane in the loading and unloading material box;

s8, after all the required new fuel is suspended into the loading and unloading material box, closing a top cover of a new fuel loading suspended port;

s9, lifting the loading and unloading material box to a designated position of the target ship for loading operation;

s10, hoisting the spent fuel in the hoisting grid in the spent fuel cabin to a spent fuel storage grid through a man-bridge crane;

s11, the next furnace fuel loading and unloading is repeated S1-S8.

8. The nuclear fuel loading and unloading vessel of claim 7, wherein: finishing spent fuel post-treatment:

when the spent fuel is stored to a certain amount, the spent fuel is required to be transported to land landfills;

s1, recovering flukes by using a mooring machine, and driving the ship to a specified wharf;

s2, releasing the flukes again to stabilize the ship;

s3, lifting and tipping the spent fuel in the spent fuel storage grillwork, conveying the spent fuel to a container loading well in the spent fuel sending cabin through a conveying pipe and a valve to be filled into a specific container, conveying the spent fuel to a container preparing well for sending preparation, and conveying the spent fuel to a container receiving room;

s4, opening a spent fuel sending hanging hatch cover at the top spent fuel sending hanging port;

s5, lifting the specific container to a container transfer trolley through a material crane, and transporting to a specified wharf to finish transfer.

9. The nuclear fuel loading and unloading vessel of claim 8, wherein: and (3) finishing new fuel storage:

s1, transporting new fuel to a main deck through a container transfer vehicle,

s2, opening a container hanging port top cover at the hanging port of the new material container,

s3, lifting the specific container from the container transfer trolley to a new fuel receiving room through a material crane;

s4, lifting the new fuel cabin auxiliary crane to a new fuel storage room for storage;

s5, closing the top cover of the hanging port of the container.